CN102619503B - Cable formation tester - Google Patents

Abstract

The invention discloses a cable formation tester, which includes a probe, a pressure measurement module, a sampling cylinder module, a hydraulic power module, a pump extraction module, an electronic control module, a downhole fluid identification module, and a common pipeline running through each module, and the sampling cylinder The sampling cylinder of the module includes a liquid storage cylinder containing its own fluid and a PVT sampling cylinder containing the measured formation fluid; the downhole fluid identification module can detect the quality characteristics of the formation fluid entering the sample pipeline in real time; the pumping module has a pre-test There are 3 working modes: mode, fluid pumping mode and fluid reverse injection mode. Compared with the traditional cable formation tester, the present invention can obtain high-quality original formation fluid samples, analyze the obtained formation fluid samples, and can accurately obtain various characteristic parameters of the formation fluid. The cable formation tester of the present invention adopts The modular structure design increases the flexibility of the instrument and facilitates the assembly and maintenance of the instrument.

Description

Cable Formation Tester

technical field

The invention relates to an oil well testing instrument, especially a cable formation testing device, which can obtain high-quality original formation fluid samples and accurately measure formation pressure.

Background technique

In the petroleum industry, obtaining accurate formation parameters in oil wells is of great significance for improving the production efficiency of oil reservoirs. In the process of petroleum exploration, in order to grasp the flow properties and physical parameters of oil and gas layers, it is necessary to carry out exact dynamic evaluation of oil and gas reservoirs. The current common practice is to test the formations, which involves a formation tester. Formation testers generally include drill pipe formation testers and cable formation testers. Although the drill pipe formation tester has mature technology, it is inconvenient to use, has a long construction period, complicated positioning operation, poor safety and reliability, and is especially not suitable for deep well or offshore oil drilling. The cable formation tester uses a cable to transmit and locate it in the wellbore downhole, and sends a control signal through the ground to make the cable formation tester work, and takes a certain volume of suction and sampling of the located formation fluid, and the suction cable formation The formation fluid of the tester is tracked and recorded to achieve the purpose of reservoir evaluation. However, the existing formation testers are not safe to use, difficult to maintain, not conducive to disassembly, easily disturbed by the test environment, unable to adapt to various formation conditions, and accurately reflect the real appearance of oil and gas formations, so its application is not ideal.

Contents of the invention

In order to solve the problems in the prior art, the purpose of the present invention is to provide a cable formation tester, which can obtain high-quality original formation fluid samples, and can accurately measure formation pressure at various points along the wellbore, and can calculate formation permeability, determine The oil-gas-water interface, to study the properties of the reservoir, and analyze the original formation fluid samples obtained, can determine the properties of the suspicious formation fluid, determine the oil-gas ratio, and obtain various characteristic parameters of the formation fluid. The cable formation tester adopts a modular The unique structural design increases the flexibility of the instrument and facilitates the assembly and maintenance of the instrument.

In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

A cable formation tester, including a probe and a pressure measurement module, a sampling cylinder module, a hydraulic power module, a pump exhaust module, an electronic control module, a power supply module for supplying power to each module, and a public pipeline running through each module, the probe and the measuring tube The pressure module includes a retractable pusher, a sampling probe and a pressure sensor. The sampling probe and the pusher are arranged opposite to each other and can be supported on the inner wall of the wellbore, and the main body of the cable formation detector is fixed at the predetermined depth of the wellbore. The fluid directly enters the sample pipeline through the sampling probe, the pressure sensor measures the pressure of the fluid entering the sampling probe, and transmits the detection signal to the electronic control module in real time, and the hydraulic power module provides hydraulic power for the pusher, sampling probe and pump exhaust module , the pump exhaust module sucks the fluid entering the sample pipeline, so that the fluid enters and exits the sampling cylinder in the sampling cylinder module, and the electronic control module receives the signals sent by the detection elements of each module, and can convert and amplify the signals before transmitting to the ground, and convert the ground control commands into control signals to control the actuators of each module. The electronic control module also includes a downhole depth positioning system. The power supply cable, signal transmission line, sample pipeline, hydraulic oil supply pipeline and hydraulic oil return pipeline are laid in the hollow tube cavity. The liquid storage cylinder and the PVT sampling cylinder containing the measured formation fluid, the closed-loop pressure control system is connected with the electronic control module signal, and the pressure compensation control is performed on the inner cavity of the sampling cylinder; the measured formation fluid and the fluid contained in the liquid storage cylinder are passed through Sample pipeline transportation; the cable formation tester also includes a downhole fluid identification module, the signal output end of the downhole fluid identification module is connected with the signal receiving end of the electronic control module, and the downhole fluid identification module detects the quality of the formation fluid entering the sample pipeline in real time characteristics, and send the detection data signal to the electronic control module in real time; the pump pumping module has three working modes: pre-test mode, fluid pumping mode and fluid reverse injection mode. When opening the sampling probe and making it contact with the measured reservoir in the wellbore for the first time, a pre-test is performed first. In the pre-test mode, the pumping module sucks the formation fluid through the sampling probe for the first time, and records the inhaled formation fluid. Pressure recovery curve, after completing the pre-test mode stage, enter the fluid pumping mode stage, the fluid pumping mode is to use the pumping module to repeatedly discharge the contaminated formation fluid into the wellbore, and at the same time detect the formation fluid in the sample pipeline When the quality characteristics of the detected formation fluid meet the sampling requirements, the measured formation fluid in the sample pipeline is injected into the PVT sampling cylinder. In the fluid reverse injection mode, the pumping module is used to drain the reservoir The fluid contained in the liquid cylinder is injected into the formation.

The above-mentioned pump extraction module includes a two-way extraction hydraulic cylinder, an electro-hydraulic servo reversing valve, a one-way valve group and a two-position three-way solenoid valve, specifically: the two-way extraction hydraulic cylinder is a combined hydraulic cylinder, including the same piston Two hydraulic cylinder units in reverse series of the rod, wherein in the first hydraulic cylinder unit, the first piston fixedly connected to one end of the piston rod makes the first hydraulic cylinder form two hydraulic cylinder working chambers, chamber I and chamber II, In the second hydraulic cylinder unit, the second piston fixedly connected to the other end of the piston rod makes the second hydraulic cylinder also form two hydraulic cylinder working chambers, chamber III and chamber IV, chamber II and chamber III are located between the two pistons , Chamber II and Chamber III can respectively pump the measured formation fluid or the fluid contained in the liquid storage cylinder according to the different working modes of the pumping module, Chamber I and Chamber IV are working medium oil chambers respectively; Chamber I and Chamber IV The hydraulic control circuit is formed by the electro-hydraulic servo reversing valve and the hydraulic energy transmission pipeline of the hydraulic power module to make the combined hydraulic cylinder work in balance; the chamber II and chamber III are respectively connected to the sampling probe, the wellbore, and the reservoir through the same set of one-way valve groups. The liquid cylinder is connected with the PVT sampling cylinder, and the one-way valve group is also connected with the wellbore and the sampling cylinder respectively through the two-position three-way solenoid valve. The polluted formation fluid is repeatedly discharged into the wellbore. When the quality of the formation fluid meets the sampling requirements, the II chamber and the III chamber control the direction of the liquid flow through the two-position three-way solenoid valve to inject the measured formation fluid into the PVT. In the sampling cylinder, through the control of the liquid flow delivery direction by the one-way valve group, the sampling probe sucks the formation fluid into chamber II and chamber III, and also injects the fluid contained in the liquid storage cylinder into the formation; the two-position three-way electromagnetic The liquid flow port of one of the valves is connected with the wellbore, the liquid flow port of the other of the two-position three-way solenoid valve is connected with the liquid storage cylinder and the PVT sampling cylinder respectively, and the chamber II and III pass through the one-way valve group , two-position three-way solenoid valve to form a fluid delivery pipeline for respectively transporting the measured formation fluid and the fluid contained in the liquid storage cylinder.

The above one-way valve group is a bridge circuit composed of four one-way valves, which are specifically connected in sequence by one-way valve A, one-way valve B, one-way valve C and one-way valve D, wherein one-way valve B and one-way valve Check valve A is connected in series to form a first-stage mud check valve, wherein check valve C and check valve D are also connected in series to form a second-stage mud check valve, and check valve B and check valve C are reversed. The series connection is non-conductive, and the one-way valve D and the one-way valve A are also connected in reverse series. The solenoid valve is connected with the liquid outlet of one-way valve A and the liquid outlet of one-way valve D at the same time, and the PVT sampling cylinder is also connected with the liquid outlet of one-way valve A and the liquid outlet of one-way valve D through the two-position three-way solenoid valve. The chamber II is connected with the liquid outlet of one-way valve B and the liquid inlet of one-way valve A at the same time, and the chamber III is connected with the liquid outlet of one-way valve C and the liquid inlet of one-way valve D at the same time, so that the pumping The exhaust module realizes two working modes: pre-test mode and fluid pumping mode.

As an improvement of the technical solution of the present invention, the pumping module also includes another set of one-way valve group, which is also a bridge circuit composed of four one-way valves, specifically, one-way valve E, one-way valve F, one-way valve The valve G and the one-way valve H are sequentially connected, wherein the one-way valve G and the one-way valve H are connected in series to form a one-stage injection fluid one-way valve, and the one-way valve F and the one-way valve E are connected in series and form a The two-stage injection fluid one-way valve, the one-way valve F and the one-way valve G are connected in reverse series and are not conducting, the one-way valve H and the one-way valve E are also connected in reverse series and not conducting, the sampling probe is connected with the one-way valve F at the same time The liquid outlet is connected with the liquid outlet of the one-way valve G, the liquid storage cylinder is connected with the liquid inlet of the one-way valve E and the liquid inlet of the one-way valve H through the two-position three-way solenoid valve, and the II cavity is connected with the one-way valve at the same time. The liquid inlet of F is connected with the liquid outlet of one-way valve E, and the chamber III is connected with the liquid inlet of one-way valve G and the liquid outlet of one-way valve H at the same time, so that the pumping module realizes the fluid reverse injection mode, through The special reversing solenoid valve for the branch control of the sample pipeline realizes the switching work of two sets of one-way valve groups, so that the pumping and discharging module realizes the alternate operation of the fluid reverse injection mode and the fluid pumping mode.

The above-mentioned downhole depth positioning system uses gamma rays to complete the depth positioning of the measured reservoir.

In the fluid pumping mode stage, the pumping speed of formation fluid is preferably 1cm ³ /s-60cm ³ /s, and the rated formation fluid pumping speed is preferably 40cm ³ /s. In the pre-test mode stage, the extraction volume of formation fluid is preferably 1 cm ³ to 20 cm ³ .

As a further improvement of the technical solution of the present invention, a linear displacement sensor is installed on the piston of the hydraulic cylinder unit of the pumping module, and the linear displacement sensor transmits the real-time detected piston position signal to the electronic control module.

As the first further improvement of the technical solution of the present invention, the downhole fluid identification module includes a resistivity tester, and the resistivity tester detects the resistivity of the formation fluid entering the sample pipeline. In the fluid pumping mode stage, when the detected After the resistivity of the original formation fluid meets the sampling requirements, immediately enter the fluid sample sampling stage, switch the liquid flow outlet of the two-position three-way solenoid valve, and inject the formation fluid in the sample pipeline into the PVT sampling cylinder.

As the first further improvement of the technical solution of the present invention, the downhole fluid identification module also includes an optical fluid identification sensor, which can identify the physical mixing state of the formation fluid multiphase flow, and detect and distinguish each phase material in real time , and can distinguish between mud filtrate and original formation fluid. In the fluid pumping mode stage, when the physical mixing state of the original formation fluid entering the sample pipeline is detected, it immediately enters the fluid sample sampling stage and switches the two-position three-way solenoid valve. Inject the formation fluid in the sample pipeline into the PVT sampling cylinder.

As the second further improvement of the technical solution of the present invention, the cable formation tester also includes a double-probe module. The double-probe module includes two sampling probes, and the two sampling probes form 180° horizontal settings or different lengths of the cable formation tester. The positions are set in parallel, and the two sampling probes are respectively matched with the pressure sensor to measure the horizontal permeability or vertical permeability of the formation, or the two sampling probes work as the main and auxiliary work for each other.

As the third further improvement of the technical solution of the present invention, the closed-loop pressure control system is composed of a pressure sensor, a DC stepping motor and a flow control valve, so that the pressure drop of the formation fluid injected into the PVT sampling cylinder is controlled within 0.5 MPa, and the already The pressure of the formation fluid injected into the PVT sampling cylinder is always above the bubble point pressure of the formation fluid.

As the fourth further improvement of the technical solution of the present invention, the cable formation tester also includes a double packer module, which divides a section of sealed space in the wellbore, and the liquid can be discharged into or out of the double-sealed space. The space sealed by the spacer forms a micro-drill pipe formation tester structure.

As the fifth further improvement of the technical solution of the present invention, the cable formation tester also includes a quick sampling probe module, and simultaneously uses two pumping modules to suck formation fluid through sample pipelines and shielding management, greatly reducing cleaning Time spent by formation fluids.

As the sixth further improvement of the technical solution of the present invention, the cable formation tester also includes a flow control module, which can control the flow rate of the formation fluid to be tested and enhance the measurement of anisotropic permeability.

As the seventh further improvement of the technical solution of the present invention, the hydraulic power module is composed of a three-phase asynchronous motor, an inclined-axis plunger pump, an oil tank, an overflow valve, an accumulator and a pressure switch, and its hydraulic system provides no more than The hydraulic energy of 25MPa, the oil tank has a floating oil tank structure, so that the pressure of the working medium is the same as that of the environment.

As the eighth further improvement of the technical solution of the present invention, the modules of the cable formation tester are connected by module connectors that can be directly disassembled and connected, which can be plugged and played. The module connectors include power supply cable connectors and signal transmission lines. Fittings, sample line fittings, hydraulic supply line fittings, and hydraulic return line fittings.

Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant advantages:

1. The cable formation tester of the present invention can obtain high-quality original formation fluid samples, and can accurately measure the formation pressure at various points along the wellbore.

2. The pressure data measured by the cable formation tester of the present invention can calculate the formation permeability, determine the oil-gas-water interface, and study the properties of the reservoir.

3. By analyzing the physical properties of the original formation fluid sample obtained by the cable formation tester of the present invention, the properties of the fluid in the suspicious layer can be determined, the oil-gas ratio can be determined, and various parameters of the formation fluid can be obtained. Since these parameters are all obtained when the formation fluid is slightly polluted in the early stage of drilling, they have important reference value.

4. Compared with the traditional cable formation tester, the cable formation tester of the present invention mainly introduces pump pumping technology, downhole fluid identification technology and closed-loop pressure control technology, and uses hydraulic servo control technology to achieve high-quality original formation fluid Sampling function.

5. The cable formation tester of the present invention adopts a modular structure design. Through expansion, it is convenient to realize the combination of various functions, improve sampling accuracy and sampling efficiency, and can perform accurate pressure measurement and high-quality sampling of original formation fluid samples in oil wells. According to different test needs, the required modules can be combined flexibly, which greatly enhances the applicability of the instrument, increases the flexibility of the instrument, and is also convenient for the assembly and maintenance of the instrument.

6. The cable formation tester of the present invention can be widely used in oil and gas exploration, and has very broad application prospects.

Description of drawings

Fig. 1 is a schematic diagram of the basic module structure of a cable formation tester according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the pumping and exhausting module according to Embodiment 1 of the present invention.

Fig. 3 is a schematic diagram of the one-way valve group in the second embodiment of the present invention.

Detailed ways

In conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail as follows:

Embodiment one:

Referring to Figures 1 and 2, a cable formation tester includes a probe and a pressure measurement module 3, a sampling cylinder module 6, a hydraulic power module 2, a pump extraction module 4, an electronic control module 1, and a power supply module for supplying power to each module And the public pipeline 9 that runs through each module, the probe and the pressure measurement module 3 include a retractable pusher 8, a sampling probe 7 and a pressure sensor, the sampling probe 7 and the pusher 8 are arranged opposite to each other, and can be supported in the wellbore 17 The main body of the cable formation detector is fixed on the predetermined depth position of the wellbore 17, the measured formation fluid directly enters the sample pipeline through the sampling probe 7, and the pressure sensor measures the pressure of the fluid entering the sampling probe 7, and sends the detection signal to the electronic circuit in real time. The control module 1 transmits, and the hydraulic power module 2 provides hydraulic power for the pusher 8, the sampling probe 7 and the pump exhaust module 4, and the pump exhaust module 4 sucks the fluid entering the sample pipeline, so that the fluid enters and exits the sampling cylinder module The sampling tube in 6, the electronic control module 1 receives the signals sent by the detection elements of each module, can convert and amplify the signals and send them to the ground, and convert the control commands on the ground into control signals to control the actuators of each module , the electronic control module 1 also includes a downhole depth positioning system. The downhole depth positioning system performs depth positioning on the measured reservoir of the wellbore 17. In the hollow lumen of the public pipeline 9, power supply cables, signal transmission lines, sample pipelines, and hydraulic pressure are laid. The oil supply pipeline and the hydraulic oil return pipeline are characterized in that the sampling cylinder module 6 includes a sampling cylinder and a closed-loop pressure control system, and the sampling cylinder includes a liquid storage cylinder 19 for containing its own fluid and a PVT sampling cylinder 18 for containing the measured formation fluid , the closed-loop pressure control system is connected with the electronic control module 1 to perform pressure compensation control on the inner cavity of the sampling cylinder; the formation fluid to be measured and the fluid contained in the liquid storage cylinder 19 are all transported through the sample pipeline; the cable formation tester also includes a downhole The fluid identification module 5, the signal output end of the downhole fluid identification module 5 is connected to the signal receiving end of the electronic control module 1, the downhole fluid identification module 5 detects the quality characteristics of the formation fluid entering the sample pipeline in real time, and transmits the detected data signal in real time Send to the electronic control module 1; the pump pumping module 4 has three working modes: pre-test mode, fluid pumping mode and fluid reverse injection mode. 7 and make it contact with the wellbore measured reservoir for the first time, first perform a pre-test, in the pre-test mode stage, the pumping and drainage module 4 sucks the formation fluid through the sampling probe 7 for the first time, and records the pressure recovery curve of the sucked formation fluid After completing the pre-test mode stage, enter the fluid pumping mode stage, the fluid pumping mode is to use the pump pumping module 4 to repeatedly discharge the contaminated formation fluid into the wellbore 17, and at the same time detect the formation fluid in the sample pipeline. quality, and when the quality characteristics of the detected formation fluid meet the sampling requirements, then inject the measured formation fluid in the sample pipeline into the PVT sampling cylinder 18, and in the fluid reverse injection mode, use the pumping module 4 The fluid contained in the liquid storage cylinder 19 is injected into the formation. The cable formation tester in this embodiment adopts a modular structure design, which can flexibly combine the required modules according to different test needs, which greatly enhances the applicability of the instrument, and can perform accurate pressure measurement and high-quality original formation in oil wells Fluid sample sampling. The pressure data measured by the cable formation tester in this embodiment can calculate the formation permeability, determine the oil-gas-water interface, and study the properties of the reservoir. By analyzing the quality characteristics of the original formation fluid samples obtained, the properties of the fluid in the suspicious layer can be determined, the oil-gas ratio can be determined, and various parameters of the formation fluid can be obtained. Since these parameters are all obtained when the formation fluid is slightly polluted in the early stage of drilling, they have important reference value.

In this embodiment, referring to FIG. 2, the above-mentioned pumping and discharging module 4 includes a two-way pumping and discharging hydraulic cylinder 11, an electro-hydraulic servo reversing valve 10, a one-way valve group and a two-position three-way solenoid valve 14, specifically: a two-way pumping The row of hydraulic cylinders 11 is a combined hydraulic cylinder, including two reverse series hydraulic cylinder units sharing the same piston rod, wherein in the first hydraulic cylinder unit, the first piston fixedly connected to one end of the piston rod makes the first hydraulic pressure The cylinder forms two hydraulic cylinder working chambers, chamber I and chamber II. In the second hydraulic cylinder unit, the second piston fixedly connected to the other end of the piston rod makes the second hydraulic cylinder also form two hydraulic chambers, chamber III and chamber IV. In the working chamber of the cylinder, chamber II and chamber III are located between the two pistons. Chamber II and chamber III can respectively suck the measured formation fluid or the fluid contained in the liquid storage cylinder 19 according to the different working modes of the pumping module 4. Chamber I and Chamber IV are working medium oil chambers respectively; Chamber I and Chamber IV form a hydraulic control circuit through the electro-hydraulic servo reversing valve 10 and the hydraulic energy delivery pipeline of the hydraulic power module 2, so that the combined hydraulic cylinder works in balance; II Cavity and III chamber are respectively connected with sampling probe 7, wellbore 17, liquid storage cylinder 19 and PVT sampling cylinder 17 through the same set of one-way valve group, and the one-way valve group is also connected with wellbore 17 and sampling The wellbore is connected to each other, and the II chamber and the III chamber control the direction of the liquid flow through the one-way valve group to repeatedly discharge the polluted formation fluid into the wellbore 17. When the quality of the formation fluid meets the sampling requirements, the II chamber and the III chamber The third chamber then controls the direction of liquid flow delivery through the two-position three-way solenoid valve 14, injects the measured formation fluid into the PVT sampling cylinder 18, and controls the direction of liquid flow delivery through the one-way valve group to make the sampling probe 7 inhale Formation fluid is injected into chamber II and chamber III, and the fluid contained in the liquid storage cylinder 19 can also be injected into the formation; one of the liquid flow ports of the two-position three-way solenoid valve 14 communicates with the wellbore 17, and the two-position three-way The liquid flow port of the other position of the solenoid valve 14 communicates with the liquid storage cylinder 19 and the PVT sampling cylinder 18 respectively. The fluid and liquid storage cylinder 19 has its own fluid delivery line for the fluid.

In this embodiment, referring to Fig. 2, the above-mentioned one-way valve group is a bridge circuit composed of four one-way valves, specifically, one-way valve A, one-way valve B, one-way valve C and one-way valve D in sequence One-way valve B and one-way valve A are connected in series to form a first-stage mud one-way valve 12, and one-way valve C and one-way valve D are also connected in series to form a second-level mud one-way valve 13 , the one-way valve B and the one-way valve C are connected in reverse series, and the one-way valve D and the one-way valve A are also connected in reverse series, and the sampling probe 7 is simultaneously connected with the liquid inlet of the one-way valve B and the The liquid inlet of C is connected, the well shaft 17 is connected with the liquid outlet of check valve A and the liquid outlet of check valve D through the two-position three-way solenoid valve 14, and the PVT sampling cylinder 18 is also connected through the two-position three-way solenoid valve 14 At the same time, it is connected with the liquid outlet of one-way valve A and the liquid outlet of one-way valve D. The chamber II is connected with the liquid outlet of one-way valve B and the liquid inlet of one-way valve A at the same time. The chamber III is connected with the liquid outlet of one-way valve C at the same time. The liquid outlet of the one-way valve D is connected with the liquid inlet of the one-way valve D, so that the pumping and discharging module 4 realizes two working modes of the pre-test mode and the fluid pumping and discharging mode. In this embodiment, the pump extraction module 4 is the core component of the cable formation tester of this embodiment, as shown in Figure 2, mainly includes a two-way extraction hydraulic cylinder 11, a one-way valve group, and an electro-hydraulic servo reversing valve 10 And two-position three-way electromagnetic valve 14 forms. The pump extraction module 4 has three working modes: pre-test, fluid extraction and reverse injection. After the sampling probe 7 and the pusher 8 of the cable formation tester in this embodiment are stretched out, a pre-test is first performed to determine whether the sampling probe is sealed with the wellbore and whether the formation permeability meets the test requirements. When in the fluid pumping mode, the mud one-way valves 12 and 13 work, and the two-position three-way solenoid valve 14 works in the left position. When pressure oil is supplied to chamber I, chamber IV communicates with the oil tank at the same time, and the piston moves from top to bottom. At this time, the formation fluid in chamber II is discharged into the wellbore through check valve A, and at the same time enters the formation fluid in the sample pipeline from sampling probe 7. Fluid is also sucked into chamber III through check valve C. When the piston moves to the end point, the electro-hydraulic servo reversing valve 10 is switched, and the pressure oil enters the IV chamber, while the I chamber communicates with the oil tank, and the piston moves from bottom to top. At this time, the formation fluid in the chamber III is discharged into the wellbore 17 through the one-way valve D, and at the same time, the formation fluid in the sample pipeline is sucked in the chamber II through the one-way valve B. Repeatedly, the two-way pumping hydraulic cylinder 11 will continuously suck the formation fluid, and then discharge the polluted formation fluid into the wellbore 17 with high back pressure. When it is detected that the formation fluid in the sample pipeline meets the sampling requirements, the two-position three-way solenoid valve 14 is switched to inject qualified samples into the PVT sampling cylinder 18 .

In this embodiment, a linear displacement sensor is installed on the piston of the hydraulic cylinder unit of the pumping module 4 , and the linear displacement sensor transmits the real-time detected piston position signal to the electronic control module 1 . During the pre-test, the pumping volume of the fluid is between 1cm ³ and 20cm ³ . By installing a linear displacement sensor on the piston, hydraulic servo control technology is used to achieve accurate fluid volume control.

In this embodiment, the modules of the cable formation tester are connected by module connectors that can be directly disassembled and connected, which can be plugged and played. The module connectors include power supply cable connectors, signal transmission line connectors, and sample pipeline connectors. , Hydraulic oil supply line joints and hydraulic oil return line joints. The cable formation tester in this embodiment adopts a modular structure, adopts electronic bus and hydraulic bus technology, so that each module is relatively independent, and the serial connection of each module is realized through the simple and fast combined connection of the end joints of each adjacent module, so that each module can be connected in series. In the module, electric energy, control signal, hydraulic working medium and formation fluid are transmitted independently.

In this embodiment, the above-mentioned downhole depth positioning system uses gamma rays to complete the depth positioning of the measured reservoir, collects corrected depth data, transmits it to the electronic control module 1, and then sends it to the ground monitoring center. The cable formation tester in this embodiment transmits control signals to realize the control of the working state of the cable formation tester in this embodiment.

In this embodiment, in the stage of fluid pumping mode, the pumping speed of formation fluid is preferably 1 cm ³ /s-60 cm ³ /s; the rated pumping speed of formation fluid is preferably 40 cm ³ /s; In the model stage, the extraction volume of formation fluid is preferably 1cm ³ -20cm ³ , and the minimum volume of the pre-test can reach 1cm ³ .

In this embodiment, when performing precise pressure measurement and PVT sampling on the exploration oil layer of the open-hole wellbore, it is first determined that the depth of the wellbore 17 where the oil reservoir is located needs to be tested, and the formation tester is lowered into the wellbore using a cable, and gamma rays are used to complete the test. The depth of the instrument in the wellbore 17 is positioned. The electronic control module 1 of this embodiment can convert and amplify the signals collected by each signal detection device and send them to the ground, and convert the control commands on the ground into control signals to control the action of the cable formation tester of this embodiment.

The probe and pressure measurement module 3 of this embodiment should have a fluid pressure measurement sensor, such as a quartz pressure sensor, in addition to a retractable pusher and a sampling probe, which can measure the pressure change curve of the formation fluid, and then preliminarily estimate the formation flow permeability. When the cable formation tester of this embodiment is lowered to the depth of the specified wellbore 17, the hydraulic power module 2 starts to work, and the sampling probe 7 and the pusher 8 are driven from the cable formation tester of this embodiment to the Stretch out in the opposite direction, and fix the wireline formation tester in the wellbore 17. Then close the balance valve, open the sampling probe 7, and enter the pre-test mode. The piston of the two-way extraction hydraulic cylinder 11 moves a certain distance according to a given volume, the formation fluid will flow into the two-way extraction hydraulic cylinder 11 through the sample pipeline, and the pressure recovery curve of the formation fluid can be recorded to judge whether the sampling probe 7 is It is sealed with the wellbore 17, and the formation flow permeability can be preliminarily estimated according to the pressure recovery curve.

When it is judged that the sampling probe 7 is well sealed with the formation and the permeability of the formation can meet the sampling requirements, it starts to enter the fluid pumping mode. The pumping and drainage module 4 is used to repeatedly discharge the contaminated formation fluid into the wellbore 17 with high back pressure. At the same time, use the downhole fluid identification module to detect the quality of the formation fluid in the sample pipeline. When the quality of the formation fluid meets the sampling requirements, switch the two-position three-way solenoid valve 14 to inject the formation fluid in the sample pipeline into the sampling cylinder module 6 In the PVT sampling cylinder 18 in.

After the oil storage formation to be tested has completed the pressure measurement and sampling tasks at one point, open the balance valve, close the sampling probe 7, and use hydraulic power to retract the sampling probe 7 and the pusher 8 into the cable formation tester of this embodiment. Reselect pressure measurement and sampling points, repeat the above process, and perform pressure measurement and sampling multiple times.

Embodiment two:

The technical solution of this embodiment is basically the same as that of Embodiment 1, the difference is that:

In this embodiment, referring to FIG. 3 , the pumping module 4 also includes another set of one-way valves, which is also a bridge circuit composed of four one-way valves, specifically one-way valve E, one-way valve F , one-way valve G and one-way valve H are connected in sequence, wherein one-way valve G and one-way valve H are connected in series to form a one-stage injection fluid one-way valve 15, wherein one-way valve F and one-way valve E are connected in series conduction and form the secondary injection fluid one-way valve 16, the one-way valve F and the one-way valve G are reversely connected in series and not conducting, the one-way valve H and the one-way valve E are also reversely connected in series and not conducting, the sampling probe 7 simultaneously It communicates with the liquid outlet of the one-way valve F and the liquid outlet of the one-way valve G, and the liquid storage cylinder 19 communicates with the liquid inlet of the one-way valve E and the liquid inlet of the one-way valve H through the two-position three-way solenoid valve 14 at the same time , the chamber II is connected with the liquid inlet of the one-way valve F and the liquid outlet of the one-way valve E at the same time, and the chamber III is connected with the liquid inlet of the one-way valve G and the liquid outlet of the one-way valve H at the same time, so that the pump exhausts the module 4 Realize the fluid reverse injection mode, and realize the switching work of two sets of one-way valve groups by controlling the special reversing solenoid valves 20 and 21 through the branch of the sample pipeline, so that the pumping and discharging module 4 realizes the fluid reverse injection mode and the fluid pumping and discharging mode alternate work. In the reverse injection mode, the mud one-way valves 12, 13 stop working, and the direction of liquid flow is controlled by the injection fluid one-way valves 14, 15. In this embodiment, the fluid contained in the cable formation tester is injected into the formation, and the special reversing solenoid valves 20 and 21 are controlled through the branch of the sample pipeline to make the injection fluid check valves 14 and 15 work. The working process is related to the fluid pumping process. The row mode is similar. Ordinary formation fluid or acidic solution can be stored in the liquid storage cylinder 19. When the formation fluid is extracted, the stored solution is injected into the original formation through the two-way pumping hydraulic cylinder 11, which can improve the flow conditions of the formation fluid. The physical properties of the original formation fluid can be judged by the change of the characteristics of the acidified formation. The volume of the liquid storage cylinder 19 can adopt several specifications of 4.5L, 10L and 20L, and the liquid storage cylinder 19 with different volumes can be selected according to the needs to be loaded with the cable formation tester of this embodiment.

Embodiment three:

The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, except that:

In this embodiment, the downhole fluid identification module includes a resistivity tester. The resistivity tester detects the resistivity of the formation fluid entering the sample pipeline. In the fluid pumping mode, when the detected resistivity of the original formation fluid meets After the sampling request, immediately enter the fluid sample sampling stage, and switch the liquid flow outlet of the two-position three-way solenoid valve 14 to inject the formation fluid in the sample pipeline into the PVT sampling cylinder 18 . By detecting the resistivity of the original formation fluid and referring to the system working standard value, the key step of switching the two-position three-way solenoid valve 14 from the fluid pumping mode stage is realized, and the formation fluid in the sample pipeline is injected into the PVT sampling cylinder In 18, it is realized to accurately and timely inform the ground engineer when the formation fluid in the sample pipeline meets the sampling requirements.

Embodiment four:

The technical solution of this embodiment and embodiment three is basically the same, the difference is:

In this embodiment, the downhole fluid identification module also includes optical fluid identification. The optical fluid identification sensor can identify the physical mixing state of multiphase flow of formation fluid, detect and distinguish each phase material in real time, and can distinguish mud filtrate from original formation fluid. In the fluid pumping mode stage, when the physical mixing state of the original formation fluid entering the sample pipeline is detected, the fluid sample sampling stage is immediately entered, and the liquid flow outlet of the two-position three-way solenoid valve 14 is switched, and the The formation fluid in the path is injected into the PVT sampling cylinder 18. The optical fluid identification sensor of this embodiment can monitor fluid composition in real time, it can distinguish the difference between mud filtrate, original formation fluid and hydrocarbons, analyze whether it is oil, water or oil-water mixture, and can also distinguish liquid and gas , and finally accurately judge the fluid composition in the sample pipeline. In this embodiment, the combination of the resistivity tester and the optical identification component is used to detect the quality characteristics of the formation fluid in the sample pipeline. When the quality characteristics index of the formation fluid meets the sampling requirements, the two-position three-way solenoid valve 14 is switched immediately, and the The formation fluid in the sample line is injected into the PVT sampling barrel 18, so it can tell the ground engineer more accurately and in time when the formation fluid in the sample line meets the sampling requirement. Optical fluid identification sensors are less affected by temperature, have high measurement accuracy, and can accurately analyze and judge the composition and properties of formation fluids.

Embodiment five:

The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, except that:

In this embodiment, the cable formation tester also includes a double-probe module, and the double-probe module includes two sampling probes 7, and the two sampling probes 7 are arranged horizontally at 180° or arranged in parallel at different length positions of the cable formation tester. The two sampling probes 7 cooperate with the pressure sensors respectively to measure the horizontal permeability or vertical permeability of the formation, or the two sampling probes 6 work as main and auxiliary one another. On the one hand, the dual-probe module of this embodiment enhances the comparative test capability of the cable formation tester, and on the other hand, the two sampling probes 7 can also realize the main and auxiliary sampling and measurement working mechanism. During use, one of the sampling probes 7 can be used In working condition, another sampling probe 7 is in standby position, which can improve the success rate of formation testing. If one sampling probe 7 breaks down, the other sampling probe 7 can still work normally, reducing the bad influence of the test failure.

Embodiment six:

The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, except that:

In this embodiment, the closed-loop pressure control system is composed of a pressure sensor, a DC stepper motor and a flow control valve, so that the pressure drop of the formation fluid injected into the PVT sampling cylinder 17 is controlled within 0.5 MPa, and the pressure drop of the formation fluid injected into the PVT sampling cylinder 17 is controlled within 0.5 MPa. The pressure of the formation fluid is always above the bubble point pressure of the formation fluid. In this embodiment, the sampling cartridge module 6 has a closed loop pressure control system. The closed-loop pressure control system can ensure that the pressure of the formation fluid is always above its bubble point pressure during PVT sampling. The volume of PVT sampling cylinder 18 can be 500cm ³ , and overvoltage protection device and vacuum insulation technology can also be used, and 6 PVT sampling cylinders can be carried each time, eg. The sampling cylinder module 6 compensates the pressure in the PVT sampling cylinder 18, so that the pressure of the formation fluid sample to be measured entering the PVT sampling cylinder 18 is always above its bubble point pressure, so as to realize overpressure protection and ensure that the formation fluid sample does not occur. Changes in composition and properties to facilitate accurate testing of formation oil storage conditions.

Embodiment seven:

The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, except that:

In this embodiment, the wireline formation tester also includes a double packer module. The double packer module divides a section of sealed space in the wellbore 17, and the liquid can be discharged into or out of the space sealed by the double packer. A micro drill pipe formation tester structure is formed. The combination of the double packer module and the pumping and drainage module 4 of this embodiment can make the cable formation tester of this embodiment form a small drill pipe formation tester. The formation fluid can be firstly injected into the annular elastic sealing element of the double packer through the pumping module 4 , so that the double packer divides a section of sealed space in the wellbore 17 . Fluid can be drained into or out of the area sealed by the dual packers, so multi-rate pressure testing and injection testing can be performed. If a probe and pressure measurement module are added to the instrument string of the double packer, a large range of horizontal and vertical permeability data can also be obtained by using vertical interference testing.

Embodiment eight:

The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, except that:

In this embodiment, the cable formation tester also includes a quick sampling probe module, and simultaneously uses two pumping and exhausting modules 4 to suck formation fluid through different sample pipelines and shielding management respectively. The rapid sampling probe module of this embodiment adopts the concept of focused sampling. The sampling probe 7 includes a sample pipeline and a shielded pipeline. At the same time, two pumping modules 4 are used to suck the formation fluid through different pipelines, which can make The speed of removing mud filtrate pollution is greatly improved, which can greatly reduce the time required to obtain high-purity formation fluid samples, improve sampling efficiency, and is suitable for application in high-permeability formation sampling.

Embodiment nine:

The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, except that:

In this embodiment, the cable formation tester further includes a flow control module, which can control the flow rate of the measured formation fluid and enhance the determination of anisotropic permeability. The flow control module of this embodiment has a larger volume PVT sampling cylinder 18 capable of controlling and accurately measuring pressure or flow rate, such as a PVT sampling cylinder 18 with a volume of 1 L, which will enhance the measurement of anisotropic permeability.

Embodiment ten:

The technical solutions of this embodiment are basically the same as those of the foregoing embodiments, except that:

In this embodiment, the hydraulic power module 2 is composed of a three-phase asynchronous motor, an inclined-axis plunger pump, a fuel tank, an overflow valve, an accumulator and a pressure switch, and its hydraulic system provides hydraulic energy not higher than 25MPa. With a floating oil tank structure, the pressure of the working medium is the same as that of the environment, reducing noise and vibration, and ensuring the stability and efficiency of the hydraulic system.

The embodiment of the present invention has been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can also be made according to the purpose of the invention of the present invention. If more formation data need to be measured, you can choose Various optional components of the cable formation tester to make the cable formation tester more powerful. All changes, modifications, substitutions, combinations, and simplifications done according to the spirit and principle of the technical solution of the present invention should be equivalent replacement methods, as long as they meet the purpose of the present invention, as long as they do not deviate from the cable formation tester of the present invention The technical principle and inventive concept all belong to the protection scope of the present invention.

Claims (18)

1. a cable formation tester, comprise probe and manometric module (3), sampling tube module (6), hydraulic power module (2), pump pump drainage module (4), electronic control module (1), for power module and the public pipeline (9) running through each described module of each module for power supply, described probe and manometric module (3) comprise the telescoping ram (8) that can stretch, sampling probe (7) and pressure sensor, described sampling probe (7) and described telescoping ram (8) are arranged dorsad, the inwall of pit shaft (17) can be supported in, and make cable formation tester main body be fixed on pit shaft (17) desired depth position, tested formation fluid directly enters sample inlet by described sampling probe (7), described pressure sensor measurement enters the pressure of the fluid of described sampling probe (7), and detection signal is transmitted to described electronic control module (1) in real time, described hydraulic power module (2) is described telescoping ram (8), sampling probe (7) and described pump pump drainage module (4) provide hydraulic power, described pump pump drainage module (4) formation fluid aspirates, formation fluid is made to enter the sample inlet of cable formation tester by described sampling probe (7), the signal that the detecting element that described electronic control module (1) accepts to control each module sends, ground is sent to after signal being carried out changing and amplifying, the control instruction on ground is converted to the executive component of control signal to each module to control, described electronic control module (1) also comprises down-hole depth localization system, the tested reservoir of described down-hole depth localization system to pit shaft (17) carries out depth localization, power cable is laid in the hollow tube chamber of described public pipeline (9), signal transmssion line, sample inlet, hydraulic pressure oil feed line and hydraulic oil-returning pipeline, it is characterized in that: described sampling tube module (6) comprises sampling tube and Closed-loop pressure control system, described sampling tube comprises the PVT sampling tube (18) of liquid storage cylinder (19) and the tested formation fluid of storage holding and carry fluid, described Closed-loop pressure control system is connected with described electronic control module (1) signal, pressure compensation control is carried out to described sampling tube inner chamber,

The fluid that tested formation fluid and described liquid storage cylinder (19) carry all is carried by described sample inlet;

Described cable formation tester also comprises downhole fluid identification module (5), the signal output part of described downhole fluid identification module (5) is connected with the signal receiving end of described electronic control module (1), described downhole fluid identification module (5) detects the mass property entering the formation fluid of sample inlet in real time, and is sent to described electronic control module (1) by data detection signal;

Described pump pump drainage module (4) has pretest pattern, fluid pump drainage pattern and fluid inverse injection mode 3 kind mode of operation, when carrying out depth localization to the tested reservoir of pit shaft, close equalizing valve, when opening sampling probe (7) and make the tested reservoir first contacts of itself and pit shaft, first pretest is carried out, in pretest mode phases, described pump pump drainage module (4) sucks formation fluid for the first time by described sampling probe (7), and record the pressure build-up curve of the formation fluid sucked, fluid pump drainage mode phases is entered after completing pretest mode phases, fluid pump drainage pattern is uses described pump pump drainage module (4) to be repeatedly discharged in pit shaft (17) by the formation fluid polluted and to go, detect the quality of formation fluid in described sample inlet simultaneously, and after the mass property of the formation fluid detected meets sampling requirement, again the tested formation fluid in described sample inlet is injected in PVT sampling tube (18), in fluid inverse injection pattern, use described pump pump drainage module (4) to be injected in stratum by the fluid that described liquid storage cylinder (19) carries to go.

2. cable formation tester according to claim 1, it is characterized in that, described pump pump drainage module (4) comprises two-way pump drainage hydraulic cylinder (11), electro-hydraulic servo reversal valve (10), one way valve group and two-position three way magnetic valve (14), be specially: described two-way pump drainage hydraulic cylinder (11) is combined type hydraulic cylinder, comprise the hydraulic cylinder unit of two differential concatenations of shared same piston rod, wherein in the first hydraulic cylinder unit, the first piston be fixedly connected with piston rod one end makes described first hydraulic cylinder unit form I chamber and two, II chamber hydraulic cylinder works chamber, wherein in the second hydraulic cylinder unit, the second piston be fixedly connected with the piston rod other end makes described second hydraulic cylinder unit also form III chamber and two, IV chamber hydraulic cylinder works chamber, described II chamber and III chamber are described in two between piston, the fluid that tested formation fluid or described liquid storage cylinder (19) carry can be aspirated according to the different working modes of described pump pump drainage module (4) respectively in described II chamber and III chamber, described I chamber and IV chamber are working media oil pocket,

Described I chamber and IV chamber form hydraulic control circuit by the hydraulic energy transfer pipeline of described electro-hydraulic servo reversal valve (10) and described hydraulic power module (2), make described combined type hydraulic cylinder balancing work;

Described II chamber and III chamber by same set of one way valve group respectively with sampling probe (7), pit shaft (17), liquid storage cylinder (19) is communicated with PVT sampling tube (18), described one way valve group is also connected with sampling tube with described pit shaft (17) respectively by described two-position three way magnetic valve (14), described II chamber and III chamber by described one way valve group to the control of liquid stream throughput direction, the formation fluid polluted is discharged into repeatedly in pit shaft (17) and goes, after the quality of formation fluid meets sampling requirement, described II chamber and III chamber are again by the control of described two-position three way magnetic valve (14), tested formation fluid is injected in PVT sampling tube (18), by described one way valve group to the control of liquid stream throughput direction, make described sampling probe (7) suck formation fluid and enter described II chamber and III chamber, the fluid that described liquid storage cylinder (19) can also be made to carry is injected in stratum and goes,

The wherein liquid head piece of of described two-position three way magnetic valve (14) is communicated with described pit shaft (17), the liquid head piece of the wherein another one of described two-position three way magnetic valve (14) is communicated with PVT sampling tube (18) with described liquid storage cylinder (19) respectively, and described II chamber and III chamber are formed by described one way valve group, described two-position three way magnetic valve (14) and carry the fluid delivery pipeline carrying fluid in tested formation fluid and described liquid storage cylinder (19) respectively.

3. cable formation tester according to claim 2, it is characterized in that: described one way valve group is the bridge type return be made up of 4 one way valves, specifically by one way valve A, one way valve B, one way valve C and one way valve D is linked in sequence and forms, wherein one way valve B and one way valve A connect conducting shape one-level mud one-way valve (12), wherein one way valve C and one way valve D also connects conducting form secondary mud one-way valve (13), described one way valve B and the not conducting of one way valve C differential concatenation, described one way valve D and one way valve A also differential concatenation not conducting, described sampling probe (7) is connected with the liquid-inlet of described one way valve C with the liquid-inlet of described one way valve B simultaneously, described pit shaft (17) is connected with the liquid outlet of described one way valve D with the liquid outlet of described one way valve A by described two-position three way magnetic valve (14) simultaneously, described PVT sampling tube (18) is also connected with the liquid outlet of described one way valve D with the liquid outlet of described one way valve A by described two-position three way magnetic valve (14) simultaneously, described II chamber is connected with the liquid-inlet of described one way valve A with the liquid outlet of described one way valve B simultaneously, described III chamber is connected with the liquid-inlet of described one way valve D with the liquid outlet of described one way valve C simultaneously, described pump pump drainage module (4) is made to realize pretest pattern, fluid pump drainage pattern two kinds of mode of operations.

4. cable formation tester according to claim 3, it is characterized in that: described pump pump drainage module (4) also comprises another set of one way valve group, its bridge type return be also made up of 4 one way valves, specifically by one way valve E, one way valve F, one way valve G and one way valve H is linked in sequence and forms, wherein one way valve G and one way valve H connect conducting form one-stage injection fluid non-return valve (16), wherein one way valve F and one way valve E connect conducting shape secondary injection fluid non-return valve (15), described one way valve F and the not conducting of one way valve G differential concatenation, described one way valve H and one way valve E also differential concatenation not conducting, described sampling probe (7) is connected with the liquid outlet of described one way valve G with the liquid outlet of described one way valve F simultaneously, described liquid storage cylinder (19) is connected with the liquid inlet of described one way valve H with the liquid inlet of described one way valve E by described two-position three way magnetic valve (14) simultaneously, described II chamber is connected with the liquid outlet of described one way valve E with the liquid inlet of described one way valve F simultaneously, described III chamber is connected with the liquid outlet of described one way valve H with the liquid inlet of described one way valve G simultaneously, described pump pump drainage module (4) is made to realize fluid inverse injection pattern, special reversing solenoid valve (20 is controlled by sample inlet branch road, 21) two covers described one way valve group switch operating is realized, described pump pump drainage module (4) is made to realize the alternation of fluid inverse injection pattern and fluid pump drainage pattern.

5. according to the cable formation tester in claim 2 ~ 4 described in any one, it is characterized in that: on the piston of the hydraulic cylinder unit of described pump pump drainage module (4), install Linear displacement transducer, the piston position signal detected in real time transmits to described electronic control module (1) by described Linear displacement transducer.

6. cable formation tester according to claim 5, it is characterized in that: described downhole fluid identification module (5) comprises resistivity measurement meter, described resistivity measurement meter detects the resistivity entering the formation fluid of described sample inlet, in fluid pump drainage mode phases, after the resistivity of the prime stratum fluid detected meets sampling requirement, at once formation fluid sampling is started, switch the fluid outlet of described two-position three way magnetic valve (14), the formation fluid in described sample inlet is injected in described PVT sampling tube (18).

7. cable formation tester according to claim 6, it is characterized in that: described downhole fluid identification module also comprises optical fluid identification sensor, described optical fluid identification sensor can identify the physical mixed state of formation fluid multiphase flow, real-time detection also distinguishes each phase material, and F and prime stratum fluid can be distinguished, in fluid pump drainage mode phases, when after the physical mixed state prime stratum fluid entering described sample inlet being detected, also the formation fluid sampling stage is at once entered, and switch the fluid outlet of described two-position three way magnetic valve (14), formation fluid in described sample inlet is injected in described PVT sampling tube (18).

8. cable formation tester according to claim 5, it is characterized in that: it also comprises dual probe module, described dual probe module comprises two described sampling probes (7), two described sampling probes (7) mutually form 180 ° and are horizontally disposed with or be arranged in parallel in described cable formation tester different length position, described two described sampling probes (7) are matched with pressure sensor respectively, measure stratum horizontal permeability or vertical permeability, or two described sampling probe (7) major-minor work each other.

9. cable formation tester according to claim 5, it is characterized in that: described Closed-loop pressure control system is made up of pressure sensor, DC stepper motor and flow control valve, the formation fluid pressure drop of the described PVT sampling tube (18) of injection is controlled within 0.5MPa, and makes the pressure of the formation fluid injecting described PVT sampling tube (18) all the time on the bubble point pressure of formation fluid.

10. cable formation tester according to claim 5, it is characterized in that: it also comprises twin packer module, described twin packer module is partitioned into the space of one section of sealing in pit shaft (17), liquid can be discharged into or discharge by the space of described twin packer module sealing, forms miniature drilling rod formation tester structure.

11. cable formation testers according to claim 5, it is characterized in that: cable formation tester also comprises fast sampling probe module, described fast sampling probe module uses two pump pump drainage modules (4) to aspirate respectively by sample inlet and shielding pipeline formation fluid simultaneously, can greatly reduce the time that cleaning formation fluid is used.

12. cable formation testers according to claim 5, is characterized in that: it also comprises flowing control module, and described flowing control module can control tested formation fluids speed, strengthen the mensuration of anisotropic permeability.

13. cable formation testers according to claim 5, it is characterized in that: described hydraulic power module (2) is made up of threephase asynchronous, bent axis type axial piston pump, fuel tank, overflow valve, accumulator and pressure switch, its hydraulic system provides not higher than the hydraulic energy of 25MPa, described fuel tank has floating Oiltank structure, makes the pressure of working media identical with the pressure of environment.

14. according to the cable formation tester in Claims 1 to 4 described in any one, it is characterized in that: between its each module, use the module connector that directly can carry out dismounting connection to connect, can plug and play, described module connector comprises power cable joint, Signal transmissions wire terminal, sample inlet joint, hydraulic pressure oil feed line joint and hydraulic oil-returning pipe joint.

15., according to the cable formation tester in Claims 1 to 4 described in any one, is characterized in that: described down-hole depth localization system utilizes gamma ray to complete depth localization to tested reservoir.

16., according to the cable formation tester in Claims 1 to 4 described in any one, is characterized in that: in fluid pump drainage mode phases, and the speed of formation fluid pump drainage is 1cm ³/ s ~ 60cm ³/ s.

17., according to the cable formation tester in Claims 1 to 4 described in any one, is characterized in that: in fluid pump drainage mode phases, and specified formation fluid pump drainage speed is 40cm ³/ s.

18., according to the cable formation tester in Claims 1 to 4 described in any one, is characterized in that: in pretest mode phases, and the extraction volume of formation fluid is 1cm ³~ 20cm ³.