CN204126640U - π storage type logging system - Google Patents

Abstract

The utility model discloses a π storage type logging system, which comprises a ground system and a downhole instrument string. The ground system includes an industrial computer, and the downhole instrument string includes drilling tools and drill pipes assembled and connected up and down. Assembled and connected with the upper hanger, the first power supply nipple, the storage control nipple, the temperature/tension/mud resistivity meter, the gamma energy spectrum logging tool, the compensated neutron logging tool, the lithology density logging tool, the second Second power sub, digital acoustic logging tool, six-arm caliper, third power sub, resistivity logging tool, telescopic sub, lower hanger, upper hanger connected with drilling tool, first power sub The pin connection with the upper hanger is realized through the release device on the upper hanger. The utility model can complete all conventional well logging items in one trip, has high logging efficiency, high logging success rate, high logging safety and low logging cost.

Description

π storage logging system

technical field

The utility model relates to a π storage type well logging system, which belongs to the field of petroleum exploration well logging.

Background technique

As the oilfield enters the mid-to-late development stage, the oil wells gradually deepen, and the pressure of the water injection wells increases year by year. At present, the wireline logging system is widely used to explore oil wells, and the systems involved include conventional three-parameter logging system, logging-while-drilling system, and drill pipe delivery logging system. Each of these logging systems has different advantages. They can collect formation logging data such as resistivity, acoustic wave propagation velocity, neutron porosity, lithology density, and natural gamma in one trip. However, they have the following common features: Disadvantages: 1. During the well logging process of these well logging systems, the exposed cables are easily damaged during the well logging process, and are easy to accumulate underground, which is easy to cause serious downhole accidents and has a high risk. 2. The downhole instrument strings of these logging systems can adopt two data transmission methods: one is that each instrument in the downhole instrument string transmits the logging data measured by itself to the ground in real time through the cable, and there is a data transmission caused by cable damage. Disadvantages such as loss. The other is to store each instrument in the downhole instrument string separately. This separate storage method makes it necessary to read the logging data in each instrument one by one after the downhole instrument string returns to the ground, which is very cumbersome. Moreover, each instrument needs to be equipped with a memory (need to be equipped with a power supply), which greatly increases the cost of the downhole instrument string.

Utility model content

The purpose of the utility model is to provide a π storage type logging system, which can complete all conventional logging items in one trip, has high logging efficiency, high logging success rate, high logging safety and low logging cost.

In order to achieve the above object, the utility model adopts the following technical solutions:

A π storage type logging system, characterized in that it includes a ground system and a downhole instrument string, the ground system includes an industrial computer, and the downhole instrument string includes a drilling tool and a drill pipe that are assembled up and down and connected, and are connected from top to bottom in the drill pipe. The upper hanger, first power supply nipple, storage control nipple, temperature/tension/mud resistivity meter, gamma energy spectrum logging tool, compensated neutron logging tool, lithology density logging tool, Second power sub, digital acoustic logging tool, six-arm caliper, third power sub, resistivity logging tool, telescopic sub, lower hanger, upper hanger connected with drilling tool, first power short The pin connection between the joint and the upper hanger is realized through the release device installed on the upper hanger. The first power supply sub-joint, storage control sub-joint, temperature/tension/mud resistivity instrument, gamma spectrum logging in the drill pipe tool, compensated neutron logging tool, lithology density logging tool, second power sub, digital acoustic logging tool, six-arm caliper, third power sub, resistivity logging tool can be The drill pipe is axially pushed out of the drill pipe and hung on the bottleneck structure of the lower hanger for well logging, including: storage control pup joint, temperature/tension/mud resistivity instrument, gamma energy spectrum logging tool, compensated neutron logging The power supply terminals of the logging tool and the lithology density logging tool are respectively connected to the output terminal of the first power supply nipple, the power supply terminals of the digital acoustic logging tool and the six-arm caliper are respectively connected to the output terminal of the second power supply nipple, and the resistance The power supply end of the rate logging tool is connected to the output end of the third power supply sub-section, the first power supply sub-section, temperature/tension/mud resistivity instrument, gamma energy spectrum logging tool, compensated neutron logging tool, lithology The signal transmission ends of the density logging tool, the second power sub, the digital acoustic logging tool, the six-arm caliper, the third power sub, and the resistivity logging tool are respectively connected to the corresponding signal transmission ends of the storage control sub .

The storage control sub-section includes a controller, a memory, a signal terminal of the memory, the first power supply sub-section, the temperature/tension/mud resistivity instrument, the gamma energy spectrum logging tool, the compensation center The sub-logging tool, the lithology density logging tool, the second power supply sub-section, the digital acoustic logging tool, the six-arm caliper, the third power supply sub-section, and the resistivity The signal transmission terminals of the logging tool are respectively connected with the corresponding signal terminals of the controller.

The first power supply short joint, the second power supply short joint, and the third power supply short joint include batteries.

An upper four-arm centralizer and a lower four-arm centralizer are respectively arranged above and below the digital acoustic logging tool.

The resistivity logging tool is an induction logging tool, or the resistivity logging tool is a dual laterolog tool and an eight laterolog tool.

A flexible sub-joint and a rotating sub-joint are installed between the storage control sub-section and the temperature/tension/mud resistivity meter.

The releaser is a numerically controlled releaser or a mechanical releaser, wherein: when the releaser is a numerically controlled releaser, a pulse pressure detection circuit is installed on the numerically controlled releaser, the numerically controlled releaser, and the pulse pressure detection circuit The power supply end of the power supply is connected to the output end of the first power supply short joint, and the signal transmission end of the digital control releaser and the pulse pressure detection circuit is connected to the corresponding signal transmission end of the storage control short joint.

The utility model has the advantages of:

1. Each instrument of the downhole instrument string can store the measured logging data in the storage control sub-section through the cable in the string. After the downhole instrument string returns to the ground, it can be read from the storage control sub-section to the industrial computer. The cost of configuring memory and power supply for each instrument is saved, and the accuracy and reliability of data transmission and reading are ensured, and the operation is convenient.

2. The utility model saves the cable, avoids downhole accidents caused by cable damage or accumulation in the downhole, and has a high logging success rate and high logging safety.

3. According to the size of the borehole to be measured, conventional drill pipe or special drill pipe can be selected. The utility model only needs the drilling team to provide hoisting equipment to carry out the logging operation. The logging area is small, the logging operation is simple, and the logging cost is low, which is only 50% to 70% of the conventional logging cost.

4. The utility model can also perform well logging operations that are difficult to achieve by conventional wireline logging under harsh environments such as high pressure and harmful gases.

5. The utility model can complete all the conventional well logging items in one downhole, and the logging efficiency is high. Formation logging data are collected to provide a basis for reservoir evaluation.

Description of drawings

Fig. 1 is a schematic composition diagram of the utility model.

Fig. 2 is a schematic diagram of the composition of the downhole instrument string in the utility model.

Detailed ways

As shown in Figures 1 and 2, the π storage type logging system of the present invention includes a ground system and a downhole instrument string 100, the ground system includes an industrial computer 400, and the downhole instrument string 100 includes a drilling tool 101 assembled up and down connected together, a drill pipe ( not marked in the figure), the upper hanger 102, the first power supply nipple 104, the storage control nipple 105, the temperature/tension/mud resistivity meter 108, the gamma energy Spectrum logging tool 109, compensated neutron logging tool 110, lithology density logging tool 111, second power supply nipple 112, digital acoustic logging tool 113, six-arm caliper 114, third power nipple 115, Resistivity logging tool 116, telescopic sub 117, lower hanger 118, upper hanger 102 is connected with drilling tool 101, the first power supply sub 104 and upper hanger 102 are connected via the release device installed on upper hanger 102 103 realizes the pin connection, the first power supply nipple 104 in the drill pipe, the storage control nipple 105, the temperature/tension/mud resistivity instrument 108, the gamma energy spectrum logging tool 109, the compensated neutron logging tool 110, the rock The density logging tool 111, the second power supply nipple 112, the digital acoustic logging tool 113, the six-arm caliper tool 114, the third power supply nipple 115, and the resistivity logging tool 116 can be released along the The drill pipe is axially pushed out of the drill pipe and hung on the bottleneck structure of the lower hanger 118 for well logging, in which: storage control nipple 105, temperature/tension/mud resistivity instrument 108, gamma energy spectrum logging tool 109, compensation The power supply terminals of the neutron logging tool 110 and the lithology density logging tool 111 are respectively connected to the output terminal of the first power supply nipple 104, and the power supply terminals of the digital acoustic logging tool 113 and the six-arm caliper tool 114 are respectively connected to the output terminal of the second power nipple 104. The output end of the power supply sub-section 112 is connected, the power supply end of the resistivity logging tool 116 is connected with the output end of the third power supply sub-section 115, the first power supply sub-section 104, the temperature/tension/mud resistivity instrument 108, the gamma energy Spectrum logging tool 109, compensated neutron logging tool 110, lithology density logging tool 111, second power supply nipple 112, digital acoustic logging tool 113, six-arm caliper 114, third power nipple 115, The signal transmission terminals of the resistivity logging tool 116 are respectively connected with the corresponding signal transmission terminals of the storage control nipple 105 .

As shown in FIG. 1 , the ground system may further include a printer 500 , and the printer 500 is connected to a corresponding IO terminal of the industrial computer 400 via a hub 300 .

In the present utility model, the ground system is a well-known system in the art, and it can also be designed with other equipment, and the specific configuration will not be repeated here.

In actual design, the memory control sub-section 105 may include a controller, a memory, a signal terminal of the memory, a first power supply sub-section 104, a temperature/tension/mud resistivity instrument 108, a gamma spectrum logging tool 109, a compensating center Signals of sub-logging tool 110, lithology-density logging tool 111, second power sub-section 112, digital acoustic logging tool 113, six-arm caliper 114, third power sub-section 115, and resistivity logging tool 116 The transmission ends are respectively connected with corresponding signal ends of the controller.

In actual design, the first power supply short joint 104 , the second power supply short joint 112 and the third power supply short joint 115 include batteries. An upper four-arm centralizer and a lower four-arm centralizer (not shown in the figure) are respectively provided on the upper and lower sides of the digital acoustic logging tool 113 .

As shown in Figure 2, in actual design, if the downhole instrument string 100 is too long, a flexible sub 106 and a rotating sub 107 can be installed between the storage control sub 105 and the temperature/tension/mud resistivity instrument 108 .

In actual use, the composition of the resistivity logging tool 116 can be selected according to user requirements. In the present utility model, the resistivity logging tool 116 has two kinds of structures, one is that the resistivity logging tool 116 is an induction logging tool (induction mode), and the other is that the resistivity logging tool 116 is a double lateral logging tool and eight laterolog tools (lateral mode).

In actual design, the releaser 103 can be a numerically controlled releaser or a mechanical releaser. When the releaser 103 is a numerically controlled releaser, a pulse pressure detection circuit (not shown in the figure) is installed on the numerically controlled releaser. The output end is connected, and the signal transmission end of the numerically controlled releaser and the pulse pressure detection circuit is connected with the corresponding signal transmission end of the storage control nipple 105 .

Each instrument in the downhole instrument string 100 is briefly introduced below:

Drilling tool 101: used for smoothly lowering downhole instrument strings to the bottom of the well.

Upper hanger 102: used to hang and fix each instrument below it.

Releaser 103: used to release the instruments in the drill pipe (except the upper hanger 102, telescopic sub-joint 117, and lower hanger 118) to the outside of the drill pipe along the axial direction of the drill pipe, so that the relevant instruments can perform measurement operations.

Pulse pressure detection circuit: used to detect the mud pressure pulse signal in the well.

The first power supply sub-section 104: it is controlled by the controller of the storage control sub-section 105, and starts or stops supplying power to each instrument connected to it in the downhole instrument string 100.

Storage control nipple 105: it is mainly used to pre-store the measurement instructions issued by the industrial computer 400, receive and store the logging data measured by each instrument. The storage control sub-section 105 includes a controller and a memory, wherein: the controller is used to control the work of each instrument, and receives the logging data measured by each instrument; Well data and preset parameters.

Flexible sub-joint 106: mainly used for flexible connection of upper and lower instruments, suitable for construction in inclined wells, and beneficial for the downhole instrument string 100 to pass through boreholes with large inclination changes.

Rotating short joint 107: It can be rotated relative to the upper and lower instruments, so as to prevent twisting and ensure safety.

Temperature/tension/mud resistivity meter 108: it is mainly used to measure the tension of wire rope, mud resistivity and borehole temperature.

Gamma energy spectrum logging tool 109: Classify the energy of gamma rays, and make full use of the information provided by the formation to determine the content of uranium, thorium, and potassium in the formation.

Compensated neutron logging tool 110: mainly used for measuring radioactivity compensated neutron porosity. The compensated neutron logging tool is a porosity logging tool whose readings reflect the hydrogen content of the formation. In porous formations, the hydrogen content of the framework material is negligible, while the pore space is usually filled with water or oil, and the hydrogen content of the two is approximately equal. Therefore, formation porosity can be determined indirectly by measuring the amount of hydrogen contained in the formation.

Lithology Density Logging Tool 111: Mainly used to measure radioactive lithology density.

The second power supply joint 112 : it is controlled by the controller of the storage control joint 105 , and starts or stops supplying power to the instruments connected to it in the downhole instrument string 100 .

Digital Sonic Logging Tool 113: It is an acoustic logging tool used in cased wells to inspect and evaluate the quality of cement cementing engineering. The main task is to check the cement bonding quality between the casing and the formation, including the first cementing surface The cementing quality of the cementing surface—the cementing situation between the cement sheath and the casing, the cementing quality of the second cementing surface—the cementing situation between the cementing sheath and the formation. At the same time, problems related to cementing engineering quality such as cement return height, cement compressive strength and casing rupture are also evaluated. In an open hole, acoustic logging tools can measure the acoustic properties of the formation medium around the wellbore, such as the sound propagation velocity in the formation, the attenuation characteristics of the formation medium to acoustic energy, etc.

Upper and lower four-arm centralizers: used to fix the digital sonic logging tool up and down.

Six-arm caliper 114: mainly used for measuring borehole caliper.

The third power supply joint 115: it is controlled by the controller of the storage control joint 105, and starts or stops supplying power to each instrument connected to it in the downhole instrument string 100.

Induction logging tool: mainly used to measure the array induction resistivity of the formation.

Dual laterolog tool: mainly used to measure deep and shallow dual laterolog resistivity.

Eight lateral logging tools: It is mainly used to measure the true resistivity of the formation, the resistivity of the flushing zone, and the resistivity of the intrusion zone, and then calculate the parameters such as permeability and water saturation, determine the lithology, and divide the oil and water layers. Its detection depth is shallow, and its vertical layering ability is strong.

Telescopic nipple 117: avoid damage to the bottom of the instrument.

Lower hanger 118: used in conjunction with upper hanger 102, for fixing various instruments above it.

In the present utility model, drilling tool 101, upper hanger 102, releaser 103, storage control nipple 105, pulse pressure detection circuit, temperature/tension/mud resistivity instrument 108, gamma energy spectrum logging instrument 109, compensation Neutron logging tool 110, lithology density logging tool 111, digital acoustic logging tool 113, six-arm caliper tool 114, dual laterologging tool, eight laterologging tool, induction logging tool, telescoping short Section 117, lower hanger 118, upper and lower four-arm centralizers, flexible joints, rotating joints, drill pipes, etc. are all existing instruments in this field or belong to well-known technologies in this field, so their specific components will not be detailed here. In addition, in the above description, the specific connection mode between related instruments is also a well-known technology in the art, and will not be repeated here.

Preset the parameters before use. Connect the controller of the storage control sub-section 105 of the downhole instrument string 100 with the industrial computer 400 by temporarily connecting the cable, so that the two can communicate, and perform clock calibration on the storage control sub-section 105 and the industrial computer 400, so that the clocks of both Synchronization, and the industrial computer 400 transmits the measurement command and the preset mud pressure pulse value to the storage control joint 105, which are stored by the memory.

After the parameters are preset, it can be used, and the downhole instrument string 100 is lowered into the well filled with mud at a set speed through the hoisting equipment, and the downhole instrument string 100 fully circulates the mud while being lowered. When the downhole instrument string 100 is lowered to the bottom of the well, the pulse pressure detection circuit will detect that the actual mud pressure pulse value has reached the preset mud pressure pulse value. The bayonet pin is put away by the device, and the relevant instruments in the drill pipe can be pushed out by increasing the pump pressure (the pushed out instruments pass through the hollow cavity of the telescopic nipple 117 and the lower hanger 118, and when the pump pressure suddenly drops, it indicates that the instruments is pushed out of the drill pipe), and by means of the bottleneck structure of the lower hanger 118, the released instrument is suspended below the lower hanger 118, ready for logging. If it is a mechanical release device, when the downhole instrument string 100 is lowered to the bottom of the well, the pin of the mechanical release device will be cut off by throwing a ball, and then the pump pressure will be increased to push out all relevant instruments in the drill pipe, and the relevant instruments in the drill pipe will be pushed out by the lower hanger. The bottleneck structure of 118, the instrument that pushes out is suspended under the lower hanger 118, is ready to carry out well logging.

When the relevant instruments are pushed out of the drill pipe, the controller controls the first, second, and third power nipples 104, 112, and 115 to be turned on, and each instrument is powered on. At the same time, the controller reads the pre-stored measurements from the memory. Instructions are used to issue measurement instructions to each instrument in the downhole instrument string 100 (here, an instrument with a measurement function). Therefore, the downhole instrument string 100 is lifted at a constant speed at a preset speed (eg, 9 m/min), and at the same time, each instrument performs measurement operations. While each instrument is performing measurement operations, each instrument will transmit the logging data measured by itself to the controller, and then stored in the memory.

When the downhole instrument string 100 returns to the wellhead, the controller controls each instrument to stop the measurement operation. On the ground, connect the controller to the industrial computer 400, and transmit the logging data (formation parameters—time corresponding data) stored in the memory to the industrial computer 400 via a temporary connection cable, so that the industrial computer 400 combines the depth recorded by itself ——Time corresponding data to draw various logging curves (such as formation parameters-depth corresponding relationship curve), and calculate the oil, gas and water content of each layer to provide accurate logging data for oilfield dynamic monitoring .

The utility model has the advantages of:

1. Each instrument of the downhole instrument string can store the measured logging data in the storage control sub-section through the cable in the string. After the downhole instrument string returns to the ground, it can be read from the storage control sub-section to the industrial computer. The cost of configuring memory and power supply for each instrument is saved, and the accuracy and reliability of data transmission and reading are ensured, and the operation is convenient.

2. The utility model saves the cable, avoids downhole accidents caused by cable damage or accumulation in the downhole, and has a high logging success rate and high logging safety.

3. According to the size of the borehole to be measured, conventional drill pipe or special drill pipe can be selected. The utility model only needs the drilling team to provide hoisting equipment to carry out the logging operation. The logging area is small, the logging operation is simple, and the logging cost is low, which is only 50% to 70% of the conventional logging cost.

4. The utility model can also perform well logging operations that are difficult to achieve by conventional wireline logging under harsh environments such as high pressure and harmful gases.

5. The utility model can complete all the conventional well logging items in one downhole, and the logging efficiency is high. Formation logging data are collected to provide a basis for reservoir evaluation.

The above are the preferred embodiments of the utility model and the technical principles used therefor. For those skilled in the art, without departing from the spirit and scope of the utility model, any technical solution based on the utility model Obvious changes such as basic equivalent transformations and simple replacements all fall within the protection scope of the present utility model.

Claims (7)

1. a π storage type logging system, is characterized in that: it comprises ground system and downhole instrument string, and ground system comprises Industrial Personal Computer (IPC), and downhole instrument string comprises assembles connected drilling tool up and down, drilling rod, in drilling rod from top to bottom successively assembly and connection have on hanger, first power supply pipe nipple, store and control pipe nipple, temperature/tension force/mud resistivity instrument, gamma spectroscopy tool, compensation neutron logger, litho-density tool, second source pipe nipple, Sonic Digital Tool, six arm calipers, 3rd power supply pipe nipple, resistivity tool, Telescopic short piece, lower hanger, upper hanger is connected with drilling tool, realizes pin joint between the first power supply pipe nipple and upper hanger via the release that upper hanger is installed, the first power supply pipe nipple in drilling rod, store and control pipe nipple, temperature/tension force/mud resistivity instrument, gamma spectroscopy tool, compensation neutron logger, litho-density tool, second source pipe nipple, Sonic Digital Tool, six arm calipers, 3rd power supply pipe nipple, resistivity tool can axially be pushed out drilling rod along drilling rod via release and be suspended on the bottleneck structure of lower hanger and log well, wherein:

Store and control pipe nipple, temperature/tension force/mud resistivity instrument, gamma spectroscopy tool, compensation neutron logger, the feeder ear of litho-density tool is connected with the output of the first power supply pipe nipple respectively, Sonic Digital Tool, the feeder ear of six arm calipers is connected with the output of second source pipe nipple respectively, the feeder ear of resistivity tool is connected with the output of the 3rd power supply pipe nipple, first power supply pipe nipple, temperature/tension force/mud resistivity instrument, gamma spectroscopy tool, compensation neutron logger, litho-density tool, second source pipe nipple, Sonic Digital Tool, six arm calipers, 3rd power supply pipe nipple, the corresponding signal transmission ends that the Signal transmissions end of resistivity tool controls pipe nipple with storage is respectively connected.

2. π storage type logging system as claimed in claim 1, is characterized in that:

Described storage controls pipe nipple and comprises controller, memory, and the Signal transmissions end of the signal end of memory, described first power supply pipe nipple, described temperature/tension force/mud resistivity instrument, described gamma spectroscopy tool, described compensation neutron logger, described litho-density tool, described second source pipe nipple, described Sonic Digital Tool, described six arm calipers, described 3rd power supply pipe nipple, described resistivity tool is connected with the corresponding signal end of controller respectively.

3. π storage type logging system as claimed in claim 1, is characterized in that:

Described first power supply pipe nipple, described second source pipe nipple, described 3rd power supply pipe nipple comprise battery.

4. π storage type logging system as claimed in claim 1, is characterized in that:

The upper and lower of described Sonic Digital Tool is respectively equipped with four arm centralizers, lower four arm centralizers.

5. π storage type logging system as claimed in claim 1, is characterized in that:

Described resistivity tool is induction log tool, or described resistivity tool is dual laterolog equipment and eight side direction logging instrument.

6. π storage type logging system as claimed in claim 1, is characterized in that:

Described storage controls to be provided with flexible nipple and rotating short-knot between pipe nipple and described temperature/tension force/mud resistivity instrument.

7. π storage type logging system as claimed in claim 1, is characterized in that:

Described release is number-controlled release or mechanical type release, wherein: when described release is number-controlled release, number-controlled release is provided with pulse testing circuit, the feeder ear of number-controlled release, pulse testing circuit is connected with the output of described first power supply pipe nipple, and the Signal transmissions end of number-controlled release, pulse testing circuit is connected with the described corresponding signal transmission ends controlling pipe nipple that stores.