CN115992695A - Novel underground intelligent measurement and control device, system and method - Google Patents
Novel underground intelligent measurement and control device, system and method Download PDFInfo
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Abstract
The invention provides a novel underground intelligent measurement and control device, a system and a method, wherein the novel underground intelligent measurement and control device comprises an optical fiber underground temperature and pressure flow sensor and a hydraulic control valve, wherein the optical fiber underground temperature and pressure flow sensor is connected with the hydraulic control valve through threads, the optical fiber underground temperature and pressure flow sensor collects underground fluid flow, temperature and pressure data, and the underground data is transmitted to an external wellhead control cabinet through an optical cable; the hydraulic control valve is connected to a wellhead control cabinet through a hydraulic control pipeline, and the wellhead control cabinet pressurizes the hydraulic control valve through the hydraulic control pipeline to adjust the underground flow. The novel underground intelligent measurement and control device, system and method realize underground signal test without electronic components, measurement and control are more accurate, hydraulic pressure is more beneficial to pushing accurate control of an underground hydraulic control valve compared with the traditional electric force, and the problem that the underground valve is not pushed is solved.
Description
Technical Field
The invention relates to the technical field of underground intelligent equipment, in particular to a novel underground intelligent measurement and control device, system and method.
Background
The underground intelligent equipment refers to a large number of electronic components, but the electronic equipment is aged and damaged due to the underground high temperature, so that the service life of the intelligent pipe column is shortened; therefore, the mechanical and optical fiber testing technology without electronic components is considered to be adopted in the underground and is applied to the underground test; and the hydraulic control pipeline is used for pressing to realize the control of the underground valve switch. Finally, the test and the control are separated, two paths of signals are respectively carried out, a wellhead control cabinet is arranged at a wellhead, and the analysis and judgment of the signals and the issuing of control instructions are realized.
In the petroleum industry, a large number of practical electronic components of oil-water well underground intelligent equipment, but because the underground high temperature and the self-heating after the circular telegram of electronic equipment for electronic equipment ageing, damage. The service life of the underground intelligent equipment is greatly shortened, and the service life of the underground intelligent pipe column is shortened; the underground intelligent equipment refers to a large number of electronic components, but the electronic equipment is aged and damaged due to the underground high temperature, so that the service life of the intelligent pipe column is shortened; therefore, the mechanical and optical fiber testing technology without electronic components is considered to be adopted in the underground and is applied to the underground test; and the hydraulic control pipeline is used for pressing to realize the control of the underground valve switch. Finally, the test and the control are separated, two paths of signals are respectively carried out, a wellhead control cabinet is arranged at a wellhead, and the analysis and judgment of the signals and the issuing of control instructions are realized.
In application number: the Chinese patent application of CN202010095172.7 relates to an offshore thick oil steam huff-puff injection-production integrated device, which comprises a high-temperature wellhead, an underground safety control system and an aerogel heat insulation oil pipe positioned in a production sleeve; the aerogel heat insulation oil pipe is provided with an aerogel heat insulation coupling, an underground safety valve, a cable passing packer, a hydraulic control pipeline and a Y-shaped joint; the improvement is that: the aerogel heat insulation oil pipe is also provided with an injection-production conversion valve, and is connected with a common oil pipe by virtue of a traversing device, and the bottom of a punching oil pipe connected with the common oil pipe is provided with a bottom fixing device; the high-temperature optical fiber enters the perforated oil pipe and then is connected with the bottom fixing device; the outer side of the aerogel heat insulation oil pipe is provided with a downhole safety control system hydraulic control pipeline and a high-temperature cable; the underground safety control system hydraulic control pipeline is connected with the exhaust valve and the ground hydraulic control system; the high-temperature cable is connected with the high-temperature electric pump and the ground electric pump control cabinet, and the uniflow valve is arranged at the outlet of the high-temperature electric pump and connected with the Y-shaped joint; the device can be simply switched between steam injection and periodic production, and has the function of on-line monitoring of high-temperature parameters at the bottom of the well.
In application number: in the chinese patent application CN202011294592.4, a well completion production string structure for controlling pressure of underground seismic waves is related, which is characterized by comprising a seismic source well string and a receiving well string; the seismic source well string comprises a first oil well casing, a first production oil pipe, a first downhole safety valve, a first production packer, a first Y-shaped joint, a perforated pipe, a centralizer, a hydraulic control sliding sleeve, a blind pipe plug, a first uniflow valve, a first electric submersible pump, a first screen pipe, a first perforation, a hydraulic controllable seismic source device and a first hydraulic control pipeline; the receiving well string comprises a second oil well casing, a second production oil pipe, a second subsurface safety valve, a second production packer, a second Y-shaped joint, a second uniflow valve, a second electric submersible pump, a second screen pipe, a second perforation, a second hydraulic control pipeline and an optical fiber.
In application number: the Chinese patent application of CN201910960638.2 relates to a composite electrohydraulic underground control system of a deepwater test pipe column safety device, which comprises a ground platform, an umbilical cable, an underwater accumulator set, an underground control module and a hydraulic actuator. The sensor devices arranged on the hydraulic actuator interface loop and the control loop are used for collecting environmental parameter data such as pressure, the ground platform is used for analyzing and comparing the collected data with the database and then sending out a control command, and the control command is transmitted to the underground control module through a cable to control the hydraulic actuator.
In application number: in the chinese patent application CN201610696164.1, a bi-directional wireless identification controlled production string and a control device for producing a stratified section are involved, so that balanced stratified section production can be realized in an oil well. The pipe column comprises a releasing tool, a packer and a centralizer, and the components are connected through an oil pipe string. The production string is released underground by a releasing tool, and the underground intelligent balanced production control valve is connected below the packer and the centralizer through an oil pipe string. The regulation and control device used with the pipe column comprises an adapter, a wireless identification electromagnetic induction charger and a wireless radio frequency identification butt joint device, wherein a cable is sequentially connected with the adapter, the wireless identification electromagnetic induction charger and the wireless radio frequency identification butt joint device, and the regulation and control device is connected with an underground intelligent balanced production control valve in a butt joint mode by being put into a layered section exploitation production pipe column through the cable.
In application number: in the Chinese patent application of CN201620911013.9, a layered section exploitation measurement and control production pipe column is related to be used in layered or section exploitation production of an oil well, continuous monitoring and control of layered or section exploitation production are realized, and a technical means is provided for acquiring dynamic production data of the oil well in real time and adjusting the production condition of the oil well in time. The production string is released in the pit through a releasing tool, an underground measuring and adjusting device is connected below a packer and a centralizer through an oil pipe string, an intelligent real-time adjusting and controlling device is connected between the releasing tool and the packer through the oil pipe string, all the underground measuring and adjusting devices in the production string are connected in parallel through connecting cables and are fixed outside the underground measuring and adjusting device, the centralizer and the packer through cable protectors, and the upper end of the connecting cable is connected with the intelligent real-time adjusting and controlling device; the shell of the wireless radio frequency identification communication module of the bidirectional wireless regulation device is inserted into the inner central tube of the eccentric installation cavity of the intelligent real-time regulation device, and the control cable is connected with the ground control equipment.
The prior art is greatly different from the invention, and the technical problem which is needed to be solved by the user is not solved, so that the invention discloses a novel underground intelligent measurement and control device, system and method.
Disclosure of Invention
The invention aims to provide a novel underground intelligent measurement and control device, system and method which not only realize underground intelligent test and control without electronic elements, but also realize long service life of an underground intelligent pipe column.
The aim of the invention can be achieved by the following technical measures: the novel underground intelligent measurement and control device comprises an optical fiber underground temperature and pressure flow sensor and a hydraulic control valve, wherein the optical fiber underground temperature and pressure flow sensor is connected with the hydraulic control valve through threads, the optical fiber underground temperature and pressure flow sensor collects underground fluid flow, temperature and pressure data, and the underground data is transmitted to an external wellhead control cabinet; the hydraulic control valve is connected to a wellhead control cabinet through a hydraulic control pipeline, and the wellhead control cabinet pressurizes the hydraulic control valve through the hydraulic control pipeline to adjust the underground flow.
The aim of the invention can be achieved by the following technical measures:
the optical fiber downhole temperature, pressure and flow sensor comprises a tuning fork vibration generator, an optical fiber vibration sensor and an optical fiber signal transmission device, wherein the tuning fork vibration generator is arranged in an oil pipe and consists of a plurality of tuning forks, and can generate vibration with corresponding frequency according to different fluid flow rates; the optical fiber vibration sensor is arranged outside the oil pipe, embedded on the outer wall of the oil pipe, connected with the optical fiber signal transmission device, receives a vibration signal from the tuning fork vibration generator and transmits the vibration signal to the optical fiber signal transmission device; the optical fiber signal transmission device consists of a communication optical fiber, receives the vibration signal from the optical fiber vibration sensor and transmits the vibration signal to the wellhead control cabinet.
The tuning forks are coaxially fixed on a connecting line at certain intervals.
The connecting line is a straight line or a spiral line with the same radius as the circular tuning fork.
The hydraulic control valve comprises an upper joint, a hydraulic control pipeline joint, a spring, a connecting sleeve, a central pipe, a lower joint, a piston, a first hole, a second hole, a third hole and a rubber ring, wherein the upper joint is connected with the hydraulic control pipeline joint, and the upper joint is connected with the upper end of the connecting sleeve through internal threads; the lower end of the connecting sleeve is connected with the lower joint through internal threads; the connecting sleeve is provided with the first hole; and the first hole is opposite to and the same size as the second hole positioned in the central tube; the upper end of the central tube is connected with the upper joint through external threads, and the lower end of the central tube is connected with the lower joint through external threads; the inner side of the piston is the central tube, the outer side of the piston is the upper joint, the upper end of the piston is close to the hydraulic control pipeline joint, and the piston is a moving part; the inner side and the outer side of the piston are provided with the rubber rings; the spring is positioned in a space surrounded by the upper joint and the piston; and the piston is provided with the third hole; the third hole is the same as the first hole and the second hole in size and shape.
When the spring is in a non-compression state, the third hole is staggered from the first hole and the second hole, no overlapping part exists, when the hydraulic control pipeline is pressurized, hydraulic oil pushes the piston to compress the spring due to the sealing effect of the rubber ring, the third hole, the first hole and the second hole start to have overlapping parts, and the greater the pressure of the hydraulic control pipeline is, the more the overlapping parts are, the hydraulic control valve
The greater the fluid flow between the inside and outside, the greater the downhole flow.
The object of the invention can also be achieved by the following technical measures: the novel underground intelligent measurement and control system comprises a wellhead control cabinet, a plurality of hydraulic control pipelines and a plurality of underground intelligent measurement and control devices, wherein the hydraulic control pipelines and the underground intelligent measurement and control devices are connected to the wellhead control cabinet, each underground intelligent measurement and control device is provided with a hydraulic control pipeline which is correspondingly connected with the hydraulic control pipeline, the underground intelligent measurement and control devices respectively collect underground fluid flow, temperature and pressure data of a production layer where the underground intelligent measurement and control devices are located and transmit the underground data to the wellhead control cabinet, and the hydraulic control pipelines respectively pressurize the corresponding underground intelligent measurement and control devices under the control of the wellhead control cabinet so as to regulate the underground flow.
The aim of the invention can be achieved by the following technical measures:
the novel underground intelligent measurement and control system further comprises a plurality of traversable packers, the traversable packers are used for setting the well bore at the upper parts of different underground production layers, and the corresponding underground intelligent measurement and control devices are installed at the positions, corresponding to the production layers, of the oil pipe columns below the traversable packers.
After the ground control cabinet judges whether the flow of each layer reaches the production allocation and injection allocation of each production layer according to the received flow information of each production layer in the underground, the ground control cabinet controls the hydraulic control pipelines to respectively pressurize the corresponding underground intelligent measurement and control devices so as to adjust the underground flow, and after the adjustment is finished, the plurality of underground intelligent measurement and control devices send the current underground temperature, pressure and flow information to the ground control cabinet.
The ground control cabinet compares the flow information of each underground production layer with the pre-manually input production allocation and injection allocation, and when the flow information of the underground production layer is larger than the pre-manually input production allocation and injection allocation, the wellhead control cabinet increases the pressure and reduces the flow of the hydraulic control pipeline on the underground intelligent measurement and control device of the corresponding production layer; otherwise, the wellhead control cabinet reduces the pressure and increases the flow of the hydraulic control pipeline on the underground intelligent measurement and control device at the corresponding production level.
The underground intelligent measurement and control device comprises an optical fiber underground temperature and pressure flow sensor and a hydraulic control valve, wherein the optical fiber underground temperature and pressure flow sensor is connected with the hydraulic control valve through threads, and the optical fiber underground temperature and pressure flow sensor collects underground fluid flow, temperature and pressure data and transmits the underground data to the wellhead control cabinet; the hydraulic control valve is connected to the wellhead control cabinet through a hydraulic control pipeline, and the wellhead control cabinet pressurizes the hydraulic control valve through the hydraulic control pipeline to adjust the underground flow.
The optical fiber downhole temperature, pressure and flow sensor comprises a tuning fork vibration generator, an optical fiber vibration sensor and an optical fiber signal transmission device, wherein the tuning fork vibration generator is arranged in an oil pipe and consists of a plurality of tuning forks, and can generate vibration with corresponding frequency according to different fluid flow rates; the optical fiber vibration sensor is arranged outside the oil pipe, embedded on the outer wall of the oil pipe, connected with the optical fiber signal transmission device, receives a vibration signal from the tuning fork vibration generator and transmits the vibration signal to the optical fiber signal transmission device; the optical fiber signal transmission device consists of a communication optical fiber, receives the vibration signal from the optical fiber vibration sensor and transmits the vibration signal to the wellhead control cabinet.
The tuning forks are coaxially fixed on a connecting line at certain intervals.
The connecting line is a straight line or a spiral line with the same radius as the circular tuning fork.
The hydraulic control valve comprises an upper joint, a hydraulic control pipeline joint, a spring, a connecting sleeve, a central pipe, a lower joint, a piston, a first hole, a second hole, a third hole and a rubber ring, wherein the upper joint is connected with the hydraulic control pipeline joint, and the upper joint is connected with the upper end of the connecting sleeve through internal threads; the lower end of the connecting sleeve is connected with the lower joint through internal threads; the connecting sleeve is provided with the first hole; and the first hole is opposite to and the same size as the second hole positioned in the central tube; the upper end of the central tube is connected with the upper joint through external threads, and the lower end of the central tube is connected with the lower joint through external threads; the inner side of the piston is the central tube, the outer side of the piston is the upper joint, the upper end of the piston is close to the hydraulic control pipeline joint, and the piston is a moving part; the inner side and the outer side of the piston are provided with the rubber rings; the spring is positioned in a space surrounded by the upper joint and the piston; and the piston is provided with the third hole; the third hole is the same as the first hole and the second hole in size and shape.
When the spring is in a non-compression state, the third hole is staggered from the first hole and the second hole, no overlapping part exists, when the hydraulic control pipeline is pressurized, hydraulic oil pushes the piston to compress the spring due to the sealing effect of the rubber ring, the overlapping part exists between the third hole and the first hole as well as between the third hole and the second hole, and the liquid flow between the inside and the outside of the hydraulic control valve is larger as the pressure of the hydraulic control pipeline is larger, and the underground flow is larger.
The aim of the invention can be achieved by the following technical measures: the novel underground intelligent measurement and control method adopts a novel underground intelligent measurement and control system and comprises the following steps:
and 4, regulating the pressure of each hydraulic control pipeline layer by the wellhead control cabinet so as to regulate the underground flow.
In step 1, the parameter a is a fraction between 0 and 1, a being a percentage of the reasonable fluctuation range of Qp.
In the step 3, if Qp is less than Qp (1-a) and less than Qp is less than Qp (1+a), then Qc is considered to meet the requirements, and the flow returns to the step 2; otherwise, qc is not in accordance with the requirement, and the step 4 is entered.
In step 4, if Qc < Qp (1-a), the wellhead control cabinet increases the pressure in the corresponding pilot-operated pipeline by a level Δp, the downhole flow increases, and the flow returns to step 2.
In step 4, if Qp (1+a) < Qc, the wellhead control cabinet reduces the pressure in the corresponding pilot-operated line by a level Δp, the downhole flow rate is reduced, and the flow returns to step 2.
The invention relates to a novel underground intelligent measurement and control device, a system and a method, wherein the underground intelligent measurement and control device consists of an optical fiber temperature, pressure and flow sensor and a hydraulic control valve; in the underground intelligent production pipe column, an underground intelligent control device is placed at a position corresponding to a production layer, and each production layer is separated by a traversable layered packer; one optical cable is connected with all underground intelligent measurement and control devices and is used for reading underground signals. Each underground intelligent measurement and control device is connected with a special hydraulic control pipeline and used for controlling the opening degree of the hydraulic control valve. The wellhead control cabinet is used for reading and analyzing the test signals and sending down-hole control instructions.
The invention has the advantages and beneficial effects that: (1) the underground signal test without electronic components is realized, which is helpful for the longevity and long-time in-well of the underground intelligent equipment; (2) the test circuit and the control circuit are separated, so that the interference of two paths of signals for testing and controlling is effectively avoided, and the measurement and control are more accurate; (3) each underground intelligent measurement and control device uses an independent hydraulic control pipeline, hydraulic pressure is more beneficial to pushing the accurate control of an underground hydraulic control valve compared with the traditional electric force, and the problem that the underground valve is not pushed is solved.
Drawings
FIG. 1 is a block diagram of one embodiment of a novel downhole intelligent measurement and control device of the present invention;
FIG. 2 is a block diagram of a fiber optic downhole flow sensor in accordance with an embodiment of the present invention;
FIG. 3 is a block diagram of a hydraulic control valve in accordance with an embodiment of the present invention;
FIG. 4 is a block diagram of a novel downhole intelligent measurement and control system in accordance with an embodiment of the present invention;
FIG. 5 is a flow chart of a novel method of intelligent downhole measurement and control in accordance with an embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
As shown in fig. 1, fig. 1 is a structural diagram of the novel underground intelligent measurement and control device of the invention. The novel underground intelligent measurement and control device comprises: an optical fiber downhole temperature pressure flow sensor 10 and a hydraulic control valve 20; the optical fiber downhole temperature, pressure and flow sensor 10 is connected with the hydraulic control valve 20 through threads.
The fiber optic downhole temperature pressure flow sensor 10 collects downhole fluid flow, temperature and pressure data and transmits the downhole data to an external wellhead control cabinet. The hydraulic control valve 20 is connected to a wellhead control cabinet through a hydraulic control pipeline, and the wellhead control cabinet pressurizes the hydraulic control valve 20 through the hydraulic control pipeline to adjust the underground flow.
The optical fiber downhole temperature, pressure and flow sensor is shown in fig. 2 and consists of a tuning fork vibration generator 21, an optical fiber vibration sensor 22 and an optical fiber signal transmission device 23. The tuning fork vibration generator 21 is arranged in the oil pipe and consists of a plurality of tuning forks, and can generate vibration with corresponding frequency according to different fluid flow rates; the optical fiber vibration sensor 22 is arranged outside the oil pipe, embedded on the outer wall of the oil pipe, connected with the optical fiber signal transmission device 23, receives the vibration signal from the tuning fork vibration generator 21, and transmits the vibration signal to the optical fiber signal transmission device 23; the optical fiber signal transmission device 23 is composed of a communication optical fiber, receives the vibration signal from the optical fiber vibration sensor 22, and transmits the vibration signal to the wellhead control cabinet.
Wherein the tuning fork vibration generator 21 is a core component: the tuning forks are coaxially fixed at certain intervals on a connecting line, which is usually a straight line, or a spiral line with the same radius as the circular tuning fork (the uniformity in the circumferential direction can be ensured). The principle is as follows: the fluid flows, pushes the tuning forks and forms an eddy current behind each tuning fork, the frequency of the eddy current is proportional to the speed of the fluid, the eddy current pushes the tuning forks to vibrate, and the resonance frequency is the largest with the tuning fork vibration amplitude consistent with the frequency of the eddy current. The vibrations are transmitted to the fiber optic vibration sensor and then the well fiber is transmitted to the surface.
The sensor has the function of testing the flow of fluid downhole, and may also test other parameters downhole including, but not limited to, temperature, pressure. The downhole temperature, pressure and flow sensor has an inner drift diameter, so that the downhole testing tool can pass through.
The hydraulic control valve (shown in fig. 3) includes: 3-1 upper joint, 3-2 hydraulic control pipeline joint, 3-3 spring, 3-4 connecting sleeve, 3-5 central tube, 3-6 lower joint, 3-7 piston, 3-8-1 hole 1, 3-8-2 hole 2, 3-8-3 hole 3, 3-9 rubber ring; the left side of the whole tool is the upper side, and the right side is the lower side;
the hydraulic control valve connection relation is as follows: the upper joint 3-1 is provided with a hydraulic control pipeline joint 3-2, and the upper joint 3-1 is connected with the upper end of the connecting sleeve 3-4 through internal threads; the lower ends of the connecting sleeves 3-4 are connected through an internal thread lower joint 3-6; the connecting sleeve 3-4 is provided with a 3-8-1 hole 1; and the 3-8-1 holes 1 are opposite to and the same size as the 3-8-2 holes 2 positioned on the central tube 3-5; the upper end of the central tube 3-5 is connected with the upper joint through external threads, and the lower end of the central tube 3-5 is connected with the lower joint 3-6 through external threads; the inner side of the piston 3-7 is a central tube 3-5, the outer side of the piston 3-7 is an upper joint 3-1, the upper end of the piston 3-7 is close to a 3-2 hydraulic control pipeline joint, and the piston 3-7 is a moving part; the inner side and the outer side of the piston 3-7 are provided with rubber rings 3-9; the spring 3-3 is positioned in a space surrounded by the upper joint 3-1 and the piston 3-7; and the piston is provided with 3-8-3 holes 3; the sizes and shapes of the 3-8-3 holes 3 and the 3-8-1 holes 1 and the 3-8-2 holes 2 are the same; when the spring is in a non-compressed state, the hole 3 is staggered from the hole 2 and the hole 1, and no overlapping part exists;
action relation: pressurizing the hydraulic control pipeline; the hydraulic oil pushes the piston 3-7 to compress the spring under the sealing action of the rubber ring 3-9, and the 3-8-3 hole 3 and the 3-8-1 and the 3-8-2 start to have overlapped parts; the tool is communicated with the inside and the outside; the greater the pressure of the hydraulic control pipeline, the more the overlapped parts are, and the greater the liquid flow between the inner pipe and the outer pipe is; conversely: when the hydraulic control pipeline reduces the pressure, the piston 3-7 moves leftwards, and the water injection hole of the water nozzle is reduced;
the working principle is that when the pressure of the hydraulic control pipeline is increased, the piston compression spring is pushed to move downwards to shield the liquid inlet hole, the liquid inlet hole is reduced, and the liquid inlet amount is reduced. Conversely, when the pressure of the hydraulic control pipeline is reduced, the piston moves upwards under the action of the spring, and the liquid inlet amount is increased.
The downhole intelligent measurement and control system is shown in fig. 4, and comprises: the well head control cabinet 1, the hydraulic control pipeline 2-2, the hydraulic control pipeline 2-3, the oil pipe 3, the optical cable 4, the traversable packer 5-1, the traversable packer 5-2, the traversable packer 5-3, the underground intelligent measurement and control device 6-1, the underground intelligent measurement and control device 6-2 and the underground intelligent measurement and control device 6-3;
the wellhead control cabinet 1 is connected with an underground intelligent measurement and control device 6-1, an underground intelligent measurement and control device 6-2 and an underground intelligent measurement and control device 6-3 through an optical cable 4; the well mouth control cabinet 1 of the underground intelligent measurement and control device transmits control instructions to the underground intelligent measurement and control devices 6-1, 6-2 and 6-3 through the optical cable 4. The underground intelligent measurement and control devices 6-1, 6-2 and 6-3 transmit the flow information of all underground production layers to the wellhead control cabinet 1 through the optical cable 4;
the wellhead control cabinet 1 is also connected with an underground intelligent measurement and control device 6-1 through a hydraulic control pipeline 2-1; the wellhead control cabinet 1 is also connected with an underground intelligent measurement and control device 6-2 through a hydraulic control pipeline 2-2; the wellhead control cabinet 1 is also connected with an underground intelligent measurement and control device 6-3 through a hydraulic control pipeline 2-3;
the packer 5-1, 5-2, 5-3 and the underground intelligent measurement and control device 6-1, 6-2, 6-3 can be penetrated and alternately connected through the oil pipe 3, and the underground intelligent measurement and control device is arranged at the position corresponding to the underground production layer. A crossover packer may be placed above each production zone.
The underground intelligent measurement and control device tests temperature, pressure and flow data of a corresponding underground production horizon through an optical fiber temperature, pressure and flow sensor; and is uploaded to the wellhead control cabinet 1 through the optical cable 4; the production allocation and injection allocation quantity Qp of each production level is manually set in the wellhead control cabinet 1 in advance; the underground measured flow is compared with the production allocation and injection allocation quantity Qp of each production layer which is input in advance in a wellhead control cabinet, if the value of the test flow Qc is between Qp (1-a) < Qc < Qp (1+a), the demand of accompanying production and injection allocation is met, otherwise, the demand of accompanying production and injection allocation is not met; if Qc is smaller than Qp (1-a), the test flow is smaller than the production and injection allocation, and the actual flow needs to be increased, so that the wellhead control cabinet 1 increases the pressure on the hydraulic control pipeline on the underground intelligent measurement and control device of the corresponding production level, a piston in the hydraulic control valve downwards presses a spring, an injection hole is enlarged, and the flow is increased. In contrast, if Qp (1+a) < Qc, it indicates that the test flow Qc is greater than the production and injection allocation Qp, and the actual flow needs to be reduced, so that the wellhead control cabinet 1 has less pressure on the hydraulic control pipeline on the underground intelligent measurement and control device at the corresponding production level, the piston in the hydraulic control valve moves upward under the thrust of the spring, the injection hole becomes smaller, and the flow is reduced.
The traversable packer can traverse an optical cable and a hydraulic control pipeline, a plurality of traversable packers are arranged in the pipe column and used for separating layers, and one traversable packer is arranged on the upper part and the lower part of the production layer respectively; the underground intelligent measurement and control device is arranged at a corresponding position of each production layer, is used for testing production parameters of the production layers, and is uploaded to the wellhead control cabinet through an optical cable. The underground intelligent measurement and control device receives pressure control of a hydraulic control pipeline, the opening degree of a hydraulic control valve changes, and the adjustment of the output (water injection quantity or oil production quantity) of each layer is realized. There may be one or more; the optical cable only needs one optical cable, is connected with each underground intelligent measurement and control device and is used for conveying underground temperature, pressure, flow and other layer production parameters to the ground; the hydraulic control pipeline is used for controlling the opening of the switch valve of each intelligent measurement and control device, and one independent hydraulic control pipeline corresponds to the hydraulic control valve in one intelligent measurement and control device, so that the opening of each layer of position regulator can be regulated; the wellhead control cabinet comprises: for (1) transmitting and receiving fiber optic signals; (2) independently controlling the pressure of each layer of hydraulic control pipeline; (3) and regulating the pressure of each layer of hydraulic control pipeline according to the read actual distribution quantity of each layer, so as to achieve qualified injection distribution. The underground intelligent measurement and control device and the traversable packer are connected in the pipe column through an oil pipe. The underground intelligent measurement and control system is arranged on an underground intelligent measurement and control pipe column, and the underground intelligent measurement and control pipe column can be used for a water injection well and an oil extraction well.
The underground intelligent measurement and control method is shown in fig. 5. After connecting all the underground tools and entering the underground intelligent measurement and control pipe column, the following control flow is executed in the wellhead control cabinet:
step 1) inputting target production and injection allocation quantity Qp, deltaP and a (a is a fraction between 0 and 1, wherein a is a percentage of a reasonable fluctuation range of Qp, and the percentage is determined by a field engineer; ) The method comprises the steps of carrying out a first treatment on the surface of the
In a wellhead control cabinet, manually inputting the production allocation and injection allocation quantity Qp of each production layer;
step 2) reading actual flow Qc of each layer;
the wellhead control cabinet 1 reads underground signals measured by all underground intelligent measurement and control devices through optical cables 4, wherein the underground signals comprise temperature, pressure and flow Qc of a production horizon;
step 3) judging whether the actual flow of each layer meets the standard:
the flow rates Qc and Qp are compared layer by layer for each production layer.
If Qp (1-a) < Qc < Qp (1+a), then Qc is considered satisfactory; step 2 is entered; otherwise, qc does not meet the requirements, and enter step 4;
step 4) adjusting the pressure of each hydraulic control pipeline layer by layer
If Qc < Qp (1-a), the wellhead control cabinet 1 increases the pressure in the corresponding pilot line by a level Δp;
if Qp (1+a) < Qc, the wellhead control cabinet 1 reduces the pressure in the corresponding pilot line by a level Δp;
The following are several specific examples of the application of the present invention.
Example 1
When the system is applied to a water injection well, water is injected simultaneously when the water injection layer is 3 layers, and the injection allocation amounts are Qp1, qp2 and Qp3 respectively; Δp=1 MPa, the well-connected water injection string is run into the well as shown in fig. 4, and the water injection valve is opened;
step 1) initializing: first, the field engineer inputs the target production or injection allocation Qp of each layer, such as: qp1 = 20m 3 /d、Qp2＝50m 3 /d、Qp3＝30m 3 D and a=0.1, Δp=1 MPa;
step 2) reading actual flow Qc of each layer; for example Qc1=21m 3 /d、Qc2＝53m 3 /d、Qc3＝35m 3 /d；
Step 3) judging whether the actual flow of each layer meets the standard:
20 (1-0.1) < 21 < 20 (1+0.1), and the first water injection quantity Qc1 meets the requirement;
50 (1-0.1) < 53 < 50 (1+0.1), and the water injection quantity Qc2 of the second layer meets the requirement;
30 (1-0.1) < 35 (30) (1+0.1), the water injection quantity Qc3 of the third layer does not meet the requirement;
step 4) the pressure of the third layer hydraulic control pipeline is regulated, qc3 is too high, and the water injection quantity of the third layer is reduced, so that the wellhead control cabinet 1 reduces the pressure of hydraulic oil in the third layer hydraulic control pipeline by delta P, namely 1MPa through the hydraulic control pipeline 2-3, and the third layer hydraulic control pipeline enters step 2.
Example 2
As shown in fig. 4, the electric downhole pump is added on the uppermost stage of the water injection pipe column which can pass through the layered packer, the water injection pipe column can be changed into an intelligent oil production pipe column for downhole measurement and control, and the measurement and control system and method are the same as those of the embodiment 1.
Example 3
The underground intelligent measurement and control device and the optical fiber testing device are used for testing parameters of various underground production layers and transmitting the parameters to a wellhead control cabinet on the ground through an optical cable. When the pressure of the hydraulic control pipeline is increased, the piston compression spring is pushed to move downwards to shield the liquid inlet hole, the liquid inlet hole is reduced, and the liquid inlet amount is reduced. Conversely, when the pressure of the hydraulic control pipeline is reduced, the piston moves upwards under the action of the spring, and the liquid inlet amount is increased.
The invention introduces an intelligent measurement and control device, system and method without electronic components in the pit, and the method has the advantages that the life of the intelligent measurement and control device in the pit is longer because the electronic components are not in the pit; in addition, the test and control systems are separated, so that the signal interference of the electric control system that the test and control signals share one line is overcome, and the stability of the system is higher. The wellhead control system on the ground is convenient to operate and reasonable in arrangement, and is beneficial to understanding and operation of field engineers; has wide field application value.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but although the present invention has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiment, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Other than the technical features described in the specification, all are known to those skilled in the art.
Claims (21)
1. The novel underground intelligent measurement and control device is characterized by comprising an optical fiber underground temperature and pressure flow sensor and a hydraulic control valve, wherein the optical fiber underground temperature and pressure flow sensor is connected with the hydraulic control valve through threads, the optical fiber underground temperature and pressure flow sensor collects underground fluid flow, temperature and pressure data, and the underground data is transmitted to an external wellhead control cabinet; the hydraulic control valve is connected to a wellhead control cabinet through a hydraulic control pipeline, and the wellhead control cabinet pressurizes the hydraulic control valve through the hydraulic control pipeline to adjust the underground flow.
2. The novel underground intelligent measurement and control device according to claim 1, wherein the optical fiber underground temperature pressure flow sensor comprises a tuning fork vibration generator, an optical fiber vibration sensor and an optical fiber signal transmission device, wherein the tuning fork vibration generator is arranged in an oil pipe and consists of a plurality of tuning forks, and can generate vibration with corresponding frequency according to different fluid flow rates; the optical fiber vibration sensor is arranged outside the oil pipe, embedded on the outer wall of the oil pipe, connected with the optical fiber signal transmission device, receives a vibration signal from the tuning fork vibration generator and transmits the vibration signal to the optical fiber signal transmission device; the optical fiber signal transmission device consists of a communication optical fiber, receives the vibration signal from the optical fiber vibration sensor and transmits the vibration signal to the wellhead control cabinet.
3. The novel downhole intelligent measurement and control device according to claim 2, wherein the tuning forks are coaxially fixed on a connecting line at certain intervals.
4. A novel underground intelligent measurement and control device according to claim 3, wherein the connecting line is a straight line or a spiral line with the same radius as the circular tuning fork.
5. The novel underground intelligent measurement and control device according to claim 1, wherein the hydraulic control valve comprises an upper joint, a hydraulic control pipeline joint, a spring, a connecting sleeve, a central pipe, a lower joint, a piston, a first hole, a second hole, a third hole and a rubber ring, the upper joint is connected with the hydraulic control pipeline joint, and the upper joint is connected with the upper end of the connecting sleeve through internal threads; the lower end of the connecting sleeve is connected with the lower joint through internal threads; the connecting sleeve is provided with the first hole; and the first hole is opposite to and the same size as the second hole positioned in the central tube; the upper end of the central tube is connected with the upper joint through external threads, and the lower end of the central tube is connected with the lower joint through external threads; the inner side of the piston is the central tube, the outer side of the piston is the upper joint, the upper end of the piston is close to the hydraulic control pipeline joint, and the piston is a moving part; the inner side and the outer side of the piston are provided with the rubber rings; the spring is positioned in a space surrounded by the upper joint and the piston; and the piston is provided with the third hole; the third hole is the same as the first hole and the second hole in size and shape.
6. The device of claim 5, wherein when the spring is in a non-compressed state, the third hole is staggered from the first hole and the second hole, and there is no overlapping portion, when the hydraulic control valve is pressurized, hydraulic oil pushes the piston to compress the spring due to the sealing effect of the rubber ring, the third hole and the first hole and the second hole start to have overlapping portions, and the greater the pressure of the hydraulic control valve, the greater the overlapping portion, the greater the liquid flow between the inside and the outside of the hydraulic control valve, and the greater the downhole flow.
7. The novel underground intelligent measurement and control system is characterized by comprising a wellhead control cabinet, a plurality of hydraulic control pipelines and a plurality of underground intelligent measurement and control devices, wherein the hydraulic control pipelines and the underground intelligent measurement and control devices are connected to the wellhead control cabinet, each underground intelligent measurement and control device is provided with a hydraulic control pipeline which is correspondingly connected with the hydraulic control pipeline, the underground intelligent measurement and control devices respectively collect underground fluid flow, temperature and pressure data of a production layer where the underground intelligent measurement and control devices are located, the underground data are transmitted to the wellhead control cabinet, and the hydraulic control pipelines are respectively pressurized to the corresponding underground intelligent measurement and control devices under the control of the wellhead control cabinet so as to regulate the underground flow.
8. The system of claim 7, further comprising a plurality of traversable packers, the traversable packers being configured to seat the well bore in an upper portion of a different downhole production zone, each traversable packer having a corresponding downhole intelligent measurement and control device mounted in a corresponding production zone position on the tubing string below the traversable packers.
9. The system of claim 8, wherein the ground control cabinet judges whether the flow of each horizon reaches the production allocation and the injection allocation of each production zone after receiving the flow information of each production zone in the well sent by the plurality of intelligent measurement and control devices in the well, the ground control cabinet controls the plurality of hydraulic control pipelines to respectively pressurize the corresponding intelligent measurement and control devices in the well so as to adjust the magnitude of the flow in the well, and the plurality of intelligent measurement and control devices in the well send the current temperature, pressure and flow information in the well to the ground control cabinet after the adjustment is completed.
10. The underground wireless communication system based on hydraulic control power generation according to claim 9, wherein the ground control cabinet compares the flow information of each underground production layer with the pre-manually input production allocation and injection allocation, and when the flow information of the underground production layer is larger than the pre-manually input production allocation and injection allocation, the wellhead control cabinet increases the pressure and reduces the flow of the hydraulic control pipeline on the underground intelligent measurement and control device of the corresponding production layer; otherwise, the wellhead control cabinet reduces the pressure and increases the flow of the hydraulic control pipeline on the underground intelligent measurement and control device at the corresponding production level.
11. The novel underground intelligent measurement and control system according to claim 7, wherein the underground intelligent measurement and control device comprises an optical fiber underground temperature and pressure flow sensor and a hydraulic control valve, wherein the optical fiber underground temperature and pressure flow sensor is connected with the hydraulic control valve through threads, and the optical fiber underground temperature and pressure flow sensor collects underground fluid flow, temperature and pressure data and transmits the underground data to the wellhead control cabinet; the hydraulic control valve is connected to the wellhead control cabinet through a hydraulic control pipeline, and the wellhead control cabinet pressurizes the hydraulic control valve through the hydraulic control pipeline to adjust the underground flow.
12. The novel underground intelligent measurement and control system according to claim 11, wherein the optical fiber underground temperature pressure flow sensor comprises a tuning fork vibration generator, an optical fiber vibration sensor and an optical fiber signal transmission device, wherein the tuning fork vibration generator is arranged in an oil pipe and consists of a plurality of tuning forks, and can generate vibration with corresponding frequency according to different fluid flow rates; the optical fiber vibration sensor is arranged outside the oil pipe, embedded on the outer wall of the oil pipe, connected with the optical fiber signal transmission device, receives a vibration signal from the tuning fork vibration generator and transmits the vibration signal to the optical fiber signal transmission device; the optical fiber signal transmission device consists of a communication optical fiber, receives the vibration signal from the optical fiber vibration sensor and transmits the vibration signal to the wellhead control cabinet.
13. The novel downhole intelligent measurement and control device according to claim 12, wherein the tuning forks are coaxially fixed to a connecting line at certain intervals.
14. The novel downhole intelligent measurement and control device according to claim 13, wherein the connecting line is a straight line or a spiral line with the same radius as the circular tuning fork.
15. The novel underground intelligent measurement and control device according to claim 11, wherein the hydraulic control valve comprises an upper joint, a hydraulic control pipeline joint, a spring, a connecting sleeve, a central pipe, a lower joint, a piston, a first hole, a second hole, a third hole and a rubber ring, the upper joint is connected with the hydraulic control pipeline joint, and the upper joint is connected with the upper end of the connecting sleeve through internal threads; the lower end of the connecting sleeve is connected with the lower joint through internal threads; the connecting sleeve is provided with the first hole; and the first hole is opposite to and the same size as the second hole positioned in the central tube; the upper end of the central tube is connected with the upper joint through external threads, and the lower end of the central tube is connected with the lower joint through external threads; the inner side of the piston is the central tube, the outer side of the piston is the upper joint, the upper end of the piston is close to the hydraulic control pipeline joint, and the piston is a moving part; the inner side and the outer side of the piston are provided with the rubber rings; the spring is positioned in a space surrounded by the upper joint and the piston; and the piston is provided with the third hole; the third hole is the same as the first hole and the second hole in size and shape.
16. The device of claim 15, wherein when the spring is in a non-compressed state, the third hole is staggered from the first hole and the second hole, and there is no overlapping portion, when the hydraulic control valve is pressurized, hydraulic oil pushes the piston to compress the spring due to the sealing effect of the rubber ring, the third hole and the first hole and the second hole start to have overlapping portions, the greater the pressure of the hydraulic control valve, the greater the overlapping portions, the greater the fluid flow between the inside and the outside of the hydraulic control valve, and the greater the downhole flow.
17. The novel underground intelligent measurement and control method is characterized in that the novel underground intelligent measurement and control method adopts the novel underground intelligent measurement and control system as claimed in claim 7, and comprises the following steps:
step 1, inputting target production and injection allocation quantity Qp, pressure grade delta P and parameter a of each production layer into a ground control cabinet;
step 2, a wellhead control cabinet reads underground signals measured by all underground intelligent measurement and control devices, wherein the underground signals comprise temperature, pressure and flow Qc of a production horizon;
step 3, judging whether the actual flow of each layer meets the standard or not by the wellhead control cabinet, and when the flow does not meet the standard, entering a step 4;
and 4, regulating the pressure of each hydraulic control pipeline layer by the wellhead control cabinet so as to regulate the underground flow.
18. The method of claim 17, wherein in step 1, the parameter a is a fraction between 0 and 1, and a is a percentage of the reasonable fluctuation range of Qp.
19. The novel downhole intelligent measurement and control method according to claim 17, wherein in step 3, if Qp (1-a) < Qc < Qp (1+a), then Qc is considered to be satisfactory, and the flow returns to step 2; otherwise, qc is not in accordance with the requirement, and the step 4 is entered.
20. The method of claim 17, wherein in step 4, if Qc < Qp (1-a), the wellhead control cabinet increases the pressure in the corresponding pilot-operated line by a level Δp, the downhole flow increases, and the flow returns to step 2.
21. The method of claim 17, wherein in step 4, if Qp (1+a) < Qc, the wellhead control cabinet reduces the pressure in the corresponding pilot-operated line by a level Δp, the downhole flow is reduced, and the flow returns to step 2.
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