Horizontal well production profile logging acquisition system and method based on photoelectric composite cable

Abstract

The invention relates to the technical field of dynamic monitoring of oil and gas fields, and discloses a horizontal well output profile logging acquisition system and method based on a photoelectric composite cable. A crawler extends into the toe end of a shaft section of a horizontal well along a sleeve in a well mouth, and an output profile logging instrument is assembled on the crawler; the traditional power supply output profile logging ground acquisition device and the distributed optical fiber ground acquisition device are located on the ground of the outer side of a well mouth and are both conveyed into a sleeve of the well mouth through photoelectric composite cables. The crawler is connected with the output profile logging instrument, and the distributed optical fiber and the traditional production logging instrument are combined for testing to realize horizontal well output profile measurement, so that the accuracy of horizontal well output profile testing aiming at complex output characteristics such as intermittent low flow is effectively improved, and the calculated output contribution rate of each section of the horizontal well is more accurate. And meanwhile, the change rule of the production characteristics along with the time change is disclosed.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic monitoring of oil and gas fields, and in particular to a horizontal well output profile logging acquisition system and method based on an optoelectronic composite cable. Background Art

[0002] With the deepening of unconventional oil and gas development, horizontal well technology has become one of the main technical means for efficient development. Horizontal well production profile logging technology can understand the production of each section of the horizontal well, quantitatively calculate the output of oil, gas and water, analyze the production characteristics and laws under different stages or different systems, describe the downhole production dynamics, and provide a reliable basis for optimizing production systems and other measures to improve the single well recovery rate. The horizontal well bore trajectory and wellbore structure are special. The multiphase flow in the horizontal section is mainly stratified flow. There is slippage between oil, gas and water. The well inclination has a greater impact on the flow state at low flow. Compared with conventional production profile testing, horizontal well testing has two major problems: acquisition and interpretation. At present, the main methods for horizontal well production profile logging are production logging instrument acquisition method, distributed fiber optic logging method and tracer production profile testing method. The production characteristics of oil and gas horizontal wells are complex. For conventional production logging instrument acquisition methods, due to the intermittent low output characteristics of individual segment clusters in the horizontal well, the information collected in a single round at different time points or production systems is easy to be lost or inaccurate.

[0003] After searching, a composite continuous pipe and cable horizontal well water-outlet section testing system and method with publication number CN111963153A and application date 2020.08.04 was found. The upper hydraulic packer assembly and the lower hydraulic packer assembly are used to isolate any section of the oil well casing, and the liquid in the oil well casing is extracted by a submersible electric plunger pump. The liquid transported to the ground by the submersible electric plunger pump downhole after the packer seat is sealed is analyzed, and the temperature and pressure of the isolation section are tested by the downhole temperature and pressure sensor assembly to determine the water-outlet layer section. The composite continuous pipe and cable described therein is in the form of a continuous pipe and cable, and the water-outlet layer section is identified only by liquid analysis, temperature, pressure and other data, and the output of oil, water and gas in each section of the horizontal well cannot be accurately calculated;

[0004] After searching, the authorization announcement number CN105937393B, the authorization announcement date 2022.11.04 invented a horizontal well drag-type production profile test string and its testing method. By placing a preset production profile tester in the oil pipe, the cable is dragged in the oil pipe to drive the production profile tester to measure the production and water content of different combination layers respectively. The cable transmits data in real time, analyzes the production and water content of each test layer in real time, and determines the production information of each production layer of the horizontal well. This invention combines the oil pipe transportation process and the cable logging process for testing, which cannot overcome the disadvantage of inaccurate horizontal well production profile testing that relies solely on the production profile test instrument to measure complex production characteristics;

[0005] After searching, a horizontal well visual real-time monitoring oil and water distribution test system and method was found with publication number CN112682027A and application date 2021.01.06. It uses a "composite cable + built-in submersible pump + visual logging instrument" built into the oil pipe and placed in the horizontal well section. The pipe string is dragged by a ground work vehicle for section-by-section testing, and the ground equipment video is transmitted in real time, which is used to intuitively determine the water output position of the horizontal well section. The test method described therein achieves measurement by dragging the pipe string with a built-in composite cable. It is difficult to implement and has high requirements for well conditions. It still cannot overcome the disadvantages of horizontal well output profile testing with complex output characteristics.

[0006] After searching, the publication number CN107893653A, the application date 2017.11.13, published a method of using continuous tubing fiber optic technology to test the output profile of horizontal wells. It does not carry any logging instruments, but uses continuous tubing to lower the test optical fiber to the target layer, thereby realizing 24-hour real-time monitoring of the entire wellbore, obtaining the output profile of each section of the horizontal well test section and the output contribution of each production layer. It can overcome the wellbore diameter limitation of the production tubing or large-diameter bridge plug in the wellbore, or the difficulty of implementing the output profile test of high-angle horizontal wells. The test method described in it measures distributed temperature sensing and distributed acoustic wave sensing data through continuous tubing with optical fiber, but the acquisition parameters are single and cannot overcome the disadvantages of inaccurate optical fiber temperature and depth calibration;

[0007] After searching, a method and device for calculating the flow rate of a horizontal well output profile based on multiple trips was found with publication number CN114439464A and application date 2022.02.07. The method and device uses a multi-probe array detection instrument to perform multiple trips of measurement in the same depth range of the wellbore, and the measurement positions of multiple probes corresponding to the multiple trips are jointly superimposed. The total flow rate of the wellbore fluid is calculated based on the measurement data of each probe, the radial projection area of ​​each probe, and the radial area of ​​the wellbore. The method described is based on the test of traditional conventional output profile test instruments, and it still cannot effectively overcome the drawbacks of inaccurate output profile testing of horizontal wells with complex output characteristics;

[0008] After searching, the publication number CN115387779A, application date 2022.07.19, published a distributed optical fiber-based oil and gas production profile testing system and method. By deploying a variety of optical fiber sensors in simulated test wells and on-site oil and gas wells, detection signals in simulated test wells and on-site oil and gas wells are obtained. At the same time, a mixed flow parameter when the fluid is released in the storage tank is regulated by the detection signal and the control component to establish a spectrum database. According to the actual detection signal and the spectrum database obtained, the production profile test data of the on-site oil and gas well is calculated. Compared with the test data calculated based on a specific optical fiber sensor and a specific fluid calculation model, the method described is more accurate, but the acquisition parameters are single and cannot overcome the disadvantages of inaccurate optical fiber calibration temperature and depth;

[0009] After searching, the publication number CN110805432A, application date 2019.11.06, published a method of using quantum dot tracers to test the production profile of horizontal wells. By adding quantum dot tracers during fracturing, the oil phase, water phase and gas phase of each fracturing section are sampled and analyzed for the return production fluid in the later stage to obtain the horizontal well production profile information. The method described therein is to analyze the production profile information by analyzing the fluid samples with markers obtained in the early stage in the later stage. The analysis cycle is long and the profile information cannot be obtained intuitively. Summary of the invention

[0010] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a horizontal well production profile logging acquisition system and method based on optoelectronic composite cables, so as to solve the technical problems of low testing accuracy of single traditional production profile logging instruments or inaccurate calibration of distributed optical fiber sensor well logging due to single parameters.

[0011] The present invention is achieved through the following technical solutions:

[0012] A horizontal well output profile logging and collection system based on an optoelectronic composite cable comprises an output profile logging instrument, a crawler, an optoelectronic composite cable, a conventional power supply output profile logging ground collection device and a distributed optical fiber ground collection device; the crawler is transported along the casing in the wellhead to the toe end of the horizontal wellbore section, a plurality of perforation sections are distributed on the horizontal wellbore for passage of oil and gas into the horizontal wellbore, the output profile logging instrument is assembled on the crawler, a machine recovery completion tool is arranged at the wellhead, the conventional power supply output profile logging ground collection device and the distributed optical fiber ground collection device are located on the ground outside the wellhead, the conventional power supply output profile logging ground collection device and the distributed optical fiber ground collection device are both arranged along the casing through the optoelectronic composite cable through the wellhead, and are connected to the output profile logging instrument through the crawler, wherein the optoelectronic composite cable covers the perforation sections arranged on the horizontal wellbore.

[0013] Preferably, the optoelectronic composite cable comprises a power supply cable and a distributed optical fiber; the power supply cable is connected to the output end of a conventional power supply output profile logging surface acquisition device, and the distributed optical fiber is connected to the distributed optical fiber surface acquisition device.

[0014] Preferably, the well production and completion tool includes an oil pipe and a sucker rod, wherein the oil pipe extends into the casing of the wellhead, and the sucker rod extends into the oil pipe for oil and gas extraction.

[0015] A method for logging and collecting a horizontal well production profile based on an optoelectronic composite cable, based on the above-mentioned logging and collecting system for logging and collecting a horizontal well production profile based on an optoelectronic composite cable, comprises the following steps:

[0016] Step 1: After the oil and gas well is shut down, the original well tubing string is pulled out, the wellbore is processed to ensure that the optical-electric composite cable can be lowered into the target layer depth of the oil layer casing, and the optical-electric composite cable is passed through the wellhead to connect with the crawler and the production profile logging instrument, and the production profile logging instrument and the towed optical-electric composite cable are transported to the toe end of the horizontal wellbore section through the crawler;

[0017] Step 2: lower the machine-recovery completion tool into the wellhead, and connect the ground end of the optoelectronic composite cable to the distributed optical fiber ground acquisition equipment and the traditional power supply output profile logging ground acquisition equipment respectively;

[0018] Step 3, operate the distributed optical fiber ground acquisition equipment to record the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data background base value through the optical-electrical composite cable layout;

[0019] Step 4, start the ground pumping unit to start extraction, operate the distributed optical fiber ground acquisition equipment to record the distributed optical fiber temperature sensor data and distributed optical fiber acoustic wave sensor data through the electric composite cable layout;

[0020] Step 5, lifting the production profile logging instrument to the depth of the horizontal well ankle end through the photoelectric composite cable to collect the first set of production profile logging curves;

[0021] Step 6, transporting the production profile instrument and the towed photoelectric composite cable to the toe end of the horizontal wellbore section through the crawler again; lifting the production profile logging instrument to the ankle end of the horizontal well through the photoelectric composite cable to collect a second set of production profile logging curves;

[0022] Step 7: disassemble the machine-drilled completion tool, and pull the production profile logging instrument out of the wellhead via the optoelectronic composite cable to complete the acquisition test.

[0023] Preferably, the optoelectronic composite cable includes a power supply cable and a distributed optical fiber, wherein the ground connection end of the distributed optical fiber is connected to the distributed optical fiber ground acquisition equipment, and the ground connection end of the power supply cable is connected to the traditional power supply output profile logging ground acquisition equipment, and the traditional power supply output profile logging ground acquisition equipment is used for power supply.

[0024] Preferably, the production profile logging instrument includes a magnetic positioning sensor, a natural gamma sensor, a pressure sensor, a temperature sensor, a water holdup sensor, a resistivity sensor and a flow sensor, which are used to collect magnetic positioning, natural gamma, pressure, temperature, water holdup, resistivity and flow curves.

[0025] Preferably, the horizontal well ankle end depth is 50 to 60 degrees of well inclination.

[0026] Preferably, in step 3, the time for recording the background base value of the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data is 12 to 24 hours.

[0027] Preferably, in step 4, the time for recording the distributed optical fiber temperature sensing data and the distributed optical fiber acoustic wave sensing data is 48 to 72 hours.

[0028] Preferably, the logging speed when collecting the first set of production profile logging curves and lifting the production profile logging instrument is set to V1, and the logging speed when collecting the second set of production profile logging curves and lifting the production profile logging instrument is set to V2, wherein V2=1.5×V1.

[0029] Compared with the prior art, the present invention has the following beneficial technical effects:

[0030] The present invention provides a horizontal well production profile logging and collection system based on an optoelectronic composite cable. The system extends a crawler along the casing in the wellhead to the toe end of the wellbore section of the horizontal well, and the production profile logging instrument is assembled on the crawler. Traditional power-supply production profile logging ground collection equipment and distributed optical fiber ground collection equipment are located on the ground outside the wellhead. The traditional power-supply production profile logging ground collection equipment and the distributed optical fiber ground collection equipment are both transported to the casing of the wellhead through the optoelectronic composite cable, and connected to the production profile logging instrument through the crawler. The distributed optical fiber and the traditional production logging instrument are jointly tested to realize the measurement of the horizontal well production profile, which effectively improves the accuracy of the horizontal well production profile test for complex production characteristics such as intermittent low flow, calculates the production contribution rate of each section of the horizontal well, and reveals the changing law of the production characteristics that change over time.

[0031] The present invention also provides a horizontal well output profile logging and acquisition method based on a photoelectric composite cable, which completes the horizontal well output profile logging and acquisition based on the photoelectric composite cable, and uses distributed optical fibers to continuously and for a long time in a static state to acquire horizontal well output profile data, thereby avoiding the disadvantage that traditional well logging single-round logging acquisition information is easily missed. The parameters such as magnetic positioning, natural gamma, pressure, temperature, water holding capacity, resistivity, flow rate, etc. measured by traditional power supply horizontal well output profile logging instruments can make up for the disadvantage of single distributed optical fiber logging acquisition parameters and overcome the disadvantage that the optical fiber itself cannot complete temperature and depth calibration, thereby improving the accuracy of distributed optical fiber temperature sensing data and depth data.

[0032] Furthermore, the horizontal well production profile logging acquisition method adopted is to lay the photoelectric composite cable connected to the production logging instrument to the toe of the horizontal wellbore, collect data statically through the distributed optical fiber in the photoelectric composite cable and repeatedly pull up the photoelectric composite cable to drag the production profile test instrument to collect data, and the distributed optical fiber and traditional production logging instruments are jointly tested to achieve horizontal well production profile measurement, which effectively improves the accuracy of horizontal well production profile testing for intermittent low-flow production characteristics, calculates the production contribution rate of each section of the horizontal well, and reveals the changing law of production characteristics over time. The dynamic and static logging method of photoelectric composite avoids the drawbacks of inaccurate testing of traditional single production logging methods and inaccurate calibration of temperature and depth of single distributed optical fiber logging, and helps to accurately calculate the production of different time or individual intermittent flow and micro-seepage production sections.

[0033] Furthermore, the production profile logging instrument and the optoelectronic composite cable are deployed together to the horizontal section of the horizontal well using a crawler, and the distributed optical fiber logging data and the traditional power supply logging instrument data are completed at the same time.

[0034] Furthermore, by using distributed optical fibers to collect the distributed optical fiber temperature sensing data and distributed optical fiber acoustic wave sensing data in the shut-in and open-well states, the dynamic changes in the production profiles of each section of the horizontal well can be effectively monitored, including the intermittent and micro-seepage conditions of individual layers.

[0035] Furthermore, the distributed optical fiber is used to continuously collect horizontal well production profile data for a long time in a static state, avoiding the disadvantage of traditional well logging that single-round logging collection information is easily missed.

[0036] Furthermore, parameters such as magnetic positioning, natural gamma, pressure, temperature, water holding capacity, resistivity, flow rate, etc. measured by traditional powered horizontal well production profile logging instruments can make up for the disadvantage of single fiber optic acquisition parameters. At the same time, temperature, gamma and magnetic positioning information can overcome the disadvantage that the optical fiber itself cannot complete temperature and depth calibration, thereby improving the accuracy of distributed optical fiber temperature sensing data and depth data.

[0037] Furthermore, the combination of distributed fiber optic sensing data and horizontal well production profile logging data can accurately interpret the complex flow characteristics of fluids in the horizontal section of the horizontal well. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the scenario of the production profile logging acquisition system based on the photoelectric composite cable in the present invention;

[0039] Figure 2 It is a logical schematic diagram of the production profile logging acquisition method based on the photoelectric composite cable in the present invention;

[0040] Figure 3 It is a flow chart of the horizontal well production profile logging acquisition method based on the photoelectric composite cable of the present invention;

[0041] In the figure: 1-production profile logging instrument; 2-crawler; 3-photoelectric composite cable; 4-oil pipe; 5-sucker rod; 6-wellhead; 7-conventional power supply production profile logging ground acquisition equipment; 8-distributed optical fiber ground acquisition equipment; 9-power supply cable; 10-distributed optical fiber; 11-perforation section; 12-casing. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0044] The purpose of the present invention is to provide a horizontal well production profile logging collection system and method based on an optoelectronic composite cable. An optoelectronic composite cable connected to a production logging instrument is lowered into a horizontal well, and data is collected statically using the distributed optical fiber in the optoelectronic composite cable. The optoelectronic composite cable is repeatedly pulled up to drag the production profile logging instrument to collect data. The distributed optical fiber and the traditional production logging instrument are jointly tested to realize the horizontal well production profile measurement, which effectively improves the accuracy of the horizontal well production profile test results for complex production characteristics such as intermittent low flow, calculates the production contribution rate of each section of the horizontal well, and reveals the changing law of the production characteristics that change over time.

[0045] See also Figure 1In one embodiment of the present invention, a horizontal well production profile logging and acquisition system based on an optoelectronic composite cable is provided, comprising an production profile logging instrument 1, a crawler 2, an optoelectronic composite cable 3, a conventional power supply production profile logging ground acquisition device 7 and a distributed optical fiber ground acquisition device 8; the crawler 2 is transported along a casing 12 in a wellhead 6 to the toe end of a horizontal wellbore section, a plurality of perforation sections 11 are distributed on the horizontal wellbore for passage of oil and gas into the horizontal wellbore, the production profile logging instrument 1 is assembled on the crawler 2, a machine recovery completion tool is provided on the wellhead 6, the conventional power supply production profile logging ground acquisition device 7 and the distributed optical fiber ground acquisition device 8 are located on the ground outside the wellhead 6, the conventional power supply production profile logging ground acquisition device 7 and the distributed optical fiber ground acquisition device 8 are both arranged along the casing 12 through the optoelectronic composite cable 3 through the wellhead 6, and are connected to the production profile logging instrument 1 through the crawler 2, wherein the optoelectronic composite cable 3 covers the perforation sections 11 provided on the horizontal wellbore.

[0046] Specifically, the optoelectronic composite cable 3 includes a power supply cable 9 and a distributed optical fiber 10 ; the power supply cable 9 is connected to the output end of a conventional power supply output profile logging ground acquisition device 7 , and the distributed optical fiber 10 is connected to a distributed optical fiber ground acquisition device 8 .

[0047] Specifically, the mechanical recovery completion tool includes an oil pipe 4 and a sucker rod 5. The oil pipe 4 extends into the casing 12 of the wellhead 6, and the sucker rod 5 extends into the oil pipe 4 for oil and gas extraction.

[0048] according to Figure 3 As shown, the present invention also provides a horizontal well production profile logging acquisition method based on an optoelectronic composite cable, based on the above-mentioned horizontal well production profile logging acquisition system based on an optoelectronic composite cable, comprising the following steps:

[0049] Step 1: After the oil and gas well is shut down, the original well tubing string is pulled out, the wellbore is processed to ensure that the optical fiber composite cable 3 can be lowered into the target layer depth of the oil layer casing, and the optical fiber composite cable 3 is passed through the wellhead 6 to connect with the crawler 2 and the production profile logging instrument 1, and the production profile logging instrument 1 and the towed optical fiber composite cable 3 are transported to the toe end of the horizontal wellbore section through the crawler 2;

[0050] Step 2: lower the mechanical well completion tool into the wellhead 6, and connect the ground end of the optoelectronic composite cable 3 to the distributed optical fiber ground acquisition equipment 8 and the traditional power supply output profile logging ground acquisition equipment 7 respectively;

[0051] Step 3, operate the distributed optical fiber ground acquisition equipment 8 to record the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data background base value through the optoelectronic composite cable 3;

[0052] Specifically, the time for recording the background base value of the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data is 12 to 24 hours;

[0053] Step 4, start the ground pumping unit to start extraction, operate the distributed optical fiber ground acquisition equipment 8 to record the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data through the electric composite cable 3;

[0054] Specifically, the time for recording the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data is 48 to 72 hours;

[0055] Step 5, lifting the production profile logging instrument 1 to the depth of the horizontal well ankle end through the photoelectric composite cable 3 to collect the first set of production profile logging curves;

[0056] Step 6, transporting the production profile instrument 1 and the towed photoelectric composite cable 3 to the toe end of the horizontal wellbore section through the crawler 2 again; lifting the production profile logging instrument 1 to the ankle end of the horizontal well through the photoelectric composite cable 3 to collect a second set of production profile logging curves;

[0057] Step 7: disassemble the machine-generated completion tool, and pull the production profile logging instrument 1 out of the wellhead through the optoelectronic composite cable 3 to complete the acquisition test.

[0058] Specifically, the optoelectronic composite cable 3 includes a power supply cable 9 and a distributed optical fiber 10, wherein the ground connection end of the distributed optical fiber 10 is connected to a distributed optical fiber ground acquisition device 8, and the ground connection end of the power supply cable 9 is connected to a traditional power supply output profile logging ground acquisition device 7, and the traditional power supply output profile logging ground acquisition device 7 is used for power supply.

[0059] Specifically, the production profile logging instrument 1 includes a magnetic positioning sensor, a natural gamma sensor, a pressure sensor, a temperature sensor, a water holdup sensor, a resistivity sensor and a flow sensor, which are used to collect magnetic positioning, natural gamma, pressure, temperature, water holdup, resistivity and flow curves.

[0060] Among them, the depth of the horizontal well ankle end is 50 to 60 degrees of well inclination.

[0061] Specifically, the logging speed when the production profile logging instrument 1 is lifted up when collecting the first set of production profile logging curves is set to V1, and the logging speed when the production profile logging instrument 1 is lifted up when collecting the second set of production profile logging curves is set to V2, wherein V2=1.5×V1.

[0062] The wellhead device selected in the present invention has a crossing structure to meet the crossing of the optoelectronic composite cable; the crawler selected is a downhole tool suitable for the inner diameter of the horizontal wellbore for conveying logging instruments and pulling cables;

[0063] The present invention uses distributed optical fibers to respectively collect the distributed optical fiber temperature sensing data and distributed optical fiber acoustic wave sensing data in the shut-in and open-well states, and can effectively monitor the dynamic changes of the output profiles of each section of the horizontal well, including the intermittent and micro-seepage conditions of individual layers. The use of distributed optical fibers to continuously collect horizontal well output profile data for a long time in a static state avoids the drawback that the traditional logging single-round logging acquisition information is easily missed. The parameters such as magnetic positioning, natural gamma, pressure, temperature, water holding capacity, resistivity, flow rate, etc. measured by the traditional power supply horizontal well output profile logging instrument can make up for the drawback of the single optical fiber acquisition parameter. At the same time, the temperature, gamma and magnetic positioning information can overcome the drawback that the optical fiber itself cannot complete the temperature and depth calibration, and improve the accuracy of the distributed optical fiber temperature sensing data and depth data. Combining the distributed optical fiber sensing data with the horizontal well output profile logging data can accurately interpret the complex flow characteristics of the horizontal section of the horizontal well.

[0064] according to Figure 2 The figure shows a logic diagram of the output profile logging acquisition method based on the optoelectronic composite cable provided by the embodiment of the present invention. The method uses distributed optical fiber to continuously acquire horizontal well output profile data for a long time in a static state, avoiding the drawback that the traditional instrument single-round or double-round logging acquisition information is easily missed.

[0065] In summary, the present invention provides a horizontal well production profile logging and acquisition system and method based on an optoelectronic composite cable. An optoelectronic composite cable connected to a production logging instrument is lowered into the horizontal well by a crawler. After static data collection is performed using the distributed optical fiber in the optoelectronic composite cable, the optoelectronic composite cable is repeatedly pulled up to drag the production profile logging instrument to collect data. The distributed optical fiber and the traditional production logging instrument are jointly tested to realize the measurement of the horizontal well production profile, which effectively improves the accuracy of the horizontal well production profile test results for complex production characteristics such as intermittent low flow, calculates the production contribution rate of each section of the horizontal well, and reveals the changing law of the production characteristics that change over time.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A horizontal well production profile logging and acquisition system based on optoelectronic composite cable, It is characterized in that The invention comprises an output profile logging instrument (1), a crawler (2), an optoelectronic composite cable (3), a conventional power supply output profile logging ground acquisition device (7) and a distributed optical fiber ground acquisition device (8); the crawler (2) is transported in a wellhead (6) along a casing (12) to the toe end of a horizontal wellbore section, a plurality of perforation sections (11) are distributed on the horizontal wellbore for oil and gas to enter the horizontal wellbore, the output profile logging instrument (1) is mounted on the crawler (2), and a mechanical acquisition device (11) is arranged on the wellhead (6). A completion tool, wherein the conventional power-supply output profile logging surface acquisition equipment (7) and the distributed optical fiber surface acquisition equipment (8) are located on the ground outside the wellhead (6), the conventional power-supply output profile logging surface acquisition equipment (7) and the distributed optical fiber surface acquisition equipment (8) are both arranged along the casing (12) through an optoelectronic composite cable (3) passing through the wellhead (6), and are connected to the output profile logging instrument (1) through a crawler (2), wherein the optoelectronic composite cable (3) covers a perforation section (11) arranged on the wellbore of the horizontal well.

2. According to claim 1, a horizontal well production profile logging and acquisition system based on an optoelectronic composite cable, It is characterized in that The optoelectronic composite cable (3) comprises a power supply cable (9) and a distributed optical fiber (10); the power supply cable (9) is connected to the output end of a conventional power supply output profile logging surface acquisition device (7), and the distributed optical fiber (10) is connected to a distributed optical fiber surface acquisition device (8).

3. According to claim 1, a horizontal well production profile logging and acquisition system based on an optoelectronic composite cable, It is characterized in that The machine-drilling completion tool comprises an oil pipe (4) and a sucker rod (5); the oil pipe (4) extends into a casing (12) of a wellhead (6); and the sucker rod (5) extends into the oil pipe (4) for oil and gas extraction.

4. A method for logging and collecting horizontal well production profiles based on an optoelectronic composite cable, based on a system for logging and collecting horizontal well production profiles based on an optoelectronic composite cable according to any one of claims 1 to 3, It is characterized in that The steps include: Step 1: After the oil and gas well is shut down, the original well oil pipe string is pulled out, the wellbore is processed to ensure that the photoelectric composite cable (3) can be lowered into the target layer depth of the oil layer casing, and the photoelectric composite cable (3) is passed through the wellhead (6) to connect with the crawler (2) and the production profile logging instrument (1), and the production profile logging instrument (1) and the pulled photoelectric composite cable (3) are transported to the toe end of the horizontal wellbore section through the crawler (2); Step 2, lowering the mechanical well completion tool into the wellhead (6), and connecting the ground end of the optoelectronic composite cable (3) to the distributed optical fiber ground acquisition equipment (8) and the traditional power supply output profile logging ground acquisition equipment (7); Step 3, operating the distributed optical fiber ground acquisition device (8) to record the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data background base value through the optoelectronic composite cable (3); Step 4, start the ground pumping unit to start extraction, operate the distributed optical fiber ground acquisition equipment (8) to record the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data through the electric composite cable (3); Step 5, lifting the production profile logging instrument (1) to the depth of the horizontal well ankle end through the photoelectric composite cable (3) to collect the first set of production profile logging curves; Step 6, the production profile instrument (1) and the towed photoelectric composite cable (3) are transported to the toe end of the horizontal wellbore section by the crawler (2) again; the production profile logging instrument (1) is lifted to the ankle end of the horizontal well by the photoelectric composite cable (3) to collect a second set of production profile logging curves; Step 7, disassemble the machine-generated completion tool, and pull the production profile logging instrument (1) out of the wellhead through the photoelectric composite cable (3) to complete the acquisition test.

5. According to claim 4, a method for logging and collecting horizontal well production profiles based on an optoelectronic composite cable, It is characterized in that The optoelectronic composite cable (3) comprises a power supply cable (9) and a distributed optical fiber (10), wherein the ground connection end of the distributed optical fiber (10) is connected to a distributed optical fiber ground acquisition device (8), and the ground connection end of the power supply cable (9) is connected to a conventional power supply output profile logging ground acquisition device (7), wherein the conventional power supply output profile logging ground acquisition device (7) is used for power supply.

6. A method for logging and collecting horizontal well production profiles based on an optoelectronic composite cable according to claim 4, It is characterized in that The production profile logging instrument (1) comprises a magnetic positioning sensor, a natural gamma sensor, a pressure sensor, a temperature sensor, a water holdup sensor, a resistivity sensor and a flow sensor, and is used for collecting magnetic positioning, natural gamma, pressure, temperature, water holdup, resistivity and flow curves.

7. A method for logging and collecting horizontal well production profiles based on an optoelectronic composite cable according to claim 4, It is characterized in that The horizontal well ankle end depth is 50 to 60 degrees of well inclination.

8. A method for logging and collecting horizontal well production profiles based on an optoelectronic composite cable according to claim 4, It is characterized in that In step 3, the time for recording the background base value of the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data is 12 to 24 hours.

9. A method for logging and collecting horizontal well production profiles based on an optoelectronic composite cable according to claim 4, It is characterized in that In step 4, the time for recording the distributed optical fiber temperature sensor data and the distributed optical fiber acoustic wave sensor data is 48 to 72 hours.

10. A method for logging and collecting horizontal well production profiles based on an optoelectronic composite cable according to claim 4, It is characterized in that The logging speed when collecting the first set of production profile logging curves and lifting the production profile logging instrument (1) is set to V1, and the logging speed when collecting the second set of production profile logging curves and lifting the production profile logging instrument (1) is set to V2, wherein V2 = 1.5 × V1.

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