CN115949389A - Photoelectric composite test system and test method - Google Patents
Photoelectric composite test system and test method Download PDFInfo
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- CN115949389A CN115949389A CN202310014372.9A CN202310014372A CN115949389A CN 115949389 A CN115949389 A CN 115949389A CN 202310014372 A CN202310014372 A CN 202310014372A CN 115949389 A CN115949389 A CN 115949389A
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Abstract
The invention discloses a photoelectric composite test system and a test method, which solve the technical problems that a test instrument is not high-temperature resistant, has poor measurement accuracy and is difficult to realize real-time information acquisition of a whole well section. The device comprises a composite continuous tube optical cable which is used for monitoring and transmitting temperature, pressure and vibration data in a steam injection well or an oil-water well, and an optical fiber pressure sensor and a high-temperature tester are arranged at the end part of the composite continuous tube optical cable; the continuous tube operation pry is used for retracting the composite continuous tube optical cable; the optical fiber demodulator is used for receiving the data information transmitted by the composite continuous pipe optical cable and demodulating the data information into a signal which can be identified and calculated by a computer; the blowout preventer is used for plugging the wellhead of a steam injection well or an oil-water well, and the composite coiled tubing optical cable can slide through the blowout preventer and can realize static and dynamic sealing. The invention can realize the real-time acquisition of the information of the whole well section, the test system can be repeatedly used, and the measurement accuracy can be improved.
Description
Technical Field
The invention belongs to the technical field of logging instruments, and particularly relates to a photoelectric composite testing system and a testing method.
Background
The ocean crude oil reserves in China are abundant, the geological reserves of crude oil are 47 hundred million, 32.9 million of the reserves are thick oil and account for about 70%, and the thick oil thermal recovery is an important direction for the development of offshore thick oil fields. In the steam injection process of the heavy oil thermal recovery well, parameters such as temperature, pressure and the like are accurately, timely and comprehensively recorded, guidance and basis can be provided for shaft safety, steam injection scheme optimization, process measure adjustment and effect evaluation, and the method has important guidance significance for economically, reasonably and efficiently recovering heavy oil reservoirs.
Most offshore thermal recovery wells are horizontal wells, the well inclination angle and the dog-leg degree are large, the steam injection well is high in temperature and pressure, the underground working condition is harsh, the testing difficulty is large, and the challenge is high. The logging instrument in the related art generally includes an electronic sensing element, a downhole signal transmission cable, and a surface acquisition system, and acquires downhole data through the electronic sensing element.
However, the underground data is collected only through the electronic sensing part, the electronic sensing part is easily influenced by other factors such as temperature and the like, and the measurement accuracy is relatively poor. Moreover, the electronic sensing part can only collect the information of the specific position of the oil well, and the real-time collection of the information of the whole well section is difficult to realize.
Therefore, the logging instrument in the related technology has the problems of poor temperature resistance, poor measurement precision and difficulty in realizing the real-time acquisition of the information of the whole well section, so that the temperature resistance and the measurement precision are improved, the real-time acquisition of the information of the whole well section is realized, and the method has important significance for the efficient development of oil and gas resources.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide a photoelectric composite testing system and a testing method, which can realize testing under a high-temperature and high-pressure working condition, improve the measurement accuracy and realize real-time acquisition of information of a whole well section.
In a first aspect, the present invention provides an optoelectronic composite testing system, including:
the composite continuous tube optical cable is used for monitoring and transmitting temperature, pressure and vibration data in a steam injection well or an oil-water well, and an optical fiber pressure sensor and a high-temperature tester are arranged at the end part of the composite continuous tube optical cable;
the continuous tube operation pry is used for retracting the composite continuous tube optical cable;
the optical fiber demodulator is used for receiving the data information transmitted by the composite continuous pipe optical cable and demodulating the data information into a signal which can be identified and calculated by a computer;
the blowout preventer is used for plugging the wellhead of a steam injection well or an oil-water well, and the composite coiled tubing optical cable can slide through the blowout preventer and can realize dynamic and static sealing.
Optionally, the composite coiled tubing optical cable comprises a coiled tubing, a protective layer and an optical cable assembly which are sequentially arranged from outside to inside, and the optical cable assembly is used for monitoring and transmitting temperature, pressure and vibration data in the well.
Optionally, the protective layer includes an inner protective steel tube and an outer protective steel tube, and the optical cable assembly is located inside the inner protective steel tube.
Optionally, the optical cable assembly includes a protection layer, and a single-film optical fiber and a multi-film optical fiber respectively disposed in the protection layer, where the single-film optical fiber is used to perform distributed monitoring and transmission on a pressure signal and a sound wave vibration signal of the whole wellbore section, and the multi-film optical fiber is used to perform distributed monitoring and transmission on a temperature signal of the whole wellbore section.
Optionally, the single-film optical fiber includes a single-film pressure measuring optical fiber and a single-film vibration optical fiber, the single-film pressure measuring optical fiber is used for performing distributed monitoring and transmission on the pressure signal of the whole well section, and the single-film vibration optical fiber is used for performing distributed monitoring and transmission on the sound wave vibration signal of the whole well section.
Optionally, the multi-film optical fiber includes a dual-film temperature measurement optical fiber, and the dual-film temperature measurement optical fiber is used for distributed monitoring and transmission of temperature signals of the whole well section.
Optionally, the optical fiber demodulator includes a distributed temperature demodulator, a pressure demodulator, and a distributed acoustic vibration demodulator, the distributed temperature demodulator is connected to the dual-membrane temperature measurement optical fiber, the pressure demodulator is connected to the single-membrane pressure measurement optical fiber and the optical fiber pressure sensor, and the distributed acoustic vibration demodulator is connected to the single-membrane vibration optical fiber.
Optionally, a packaging protection device is arranged at the end of the composite continuous tube optical cable, the optical fiber pressure sensor is located in the packaging protection device, and the high-temperature tester is arranged at the tail end of the packaging protection device.
Optionally, the high temperature tester is screwed to the tail end of the packaging protection device.
In a second aspect, the present invention provides a testing method using an optoelectronic composite testing system, including the following steps:
s1, connecting equipment, debugging the composite continuous tube optical cable, the optical fiber demodulator, the optical fiber pressure sensor and the high-temperature tester, and ensuring that optical fiber test signals are normal and the high-temperature tester works normally;
s2, injecting nitrogen into the blowout preventer through a nitrogen injection system to block high-temperature fluid in the well from returning upwards;
s3, putting the composite coiled tubing optical cable, the optical fiber pressure sensor and the high-temperature tester into the well by the coiled tubing operation prying;
s4, the composite continuous tube optical cable starts to monitor and transmit temperature, vibration and pressure data of the whole well section, and meanwhile, the high-temperature tester starts to automatically test and store information of parameters such as temperature and pressure in the well;
and S5, stopping testing, prying and recovering the composite continuous pipe optical cable, the optical fiber pressure sensor and the high-temperature tester through continuous pipe operation, and replaying test data.
According to the technical scheme, the photoelectric composite test system and the test method provided by the invention have the following advantages:
the device monitors and transmits temperature, vibration and pressure data in the well by utilizing the composite coiled tubing optical cable, and can realize real-time monitoring and acquisition of information of the whole well section, thereby improving the data acquisition range. Moreover, the composite continuous pipe optical cable, the optical fiber pressure sensor and the high-temperature tester are matched for use, so that the transmission and sensing integration is realized, the high-temperature tester is used for accurately testing parameters such as downhole temperature, pressure and vibration, and the test data and the optical fiber test data are contrastively analyzed and mutually verified, so that the photoelectric composite test is realized, and the measurement accuracy is further improved.
Additional features and advantages of the invention will be set forth in the description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and do not constitute a limitation thereof.
FIG. 1 is a schematic diagram of an overall structure of an optoelectronic composite test system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a photoelectric composite testing system during use;
FIG. 3 is a cross-sectional view of a composite continuous tube fiber optic cable in an embodiment of the present invention;
fig. 4 is a cross-sectional view of a package protection device in an embodiment of the invention.
Description of reference numerals:
1. a composite coiled tubing optical cable; 11. a coiled tubing; 12. a protective layer; 121. an inner protective steel pipe; 122. an outer protective steel pipe; 13. a cable assembly; 131. a protective layer; 132. a single-film optical fiber; 1321. a single-membrane pressure measurement optical fiber; 1322. a single-film vibration optical fiber; 133. a multi-film optical fiber; 1331. a double-film temperature measuring optical fiber; 2. prying the continuous pipe; 3. an optical fiber demodulator; 31. a distributed temperature demodulator; 32. a pressure demodulator; 33. a distributed acoustic vibration demodulator; 4. a blowout preventer; 5. a fiber optic pressure sensor; 6. a high temperature tester; 7. packaging the protection device; 701. sealing the joint; 702. supporting the outer cylinder; 703. a ferrule fitting; 704. a pressure bearing pad; 705. flexible graphite; 706. a compression pad; 707. a compression nut; 708. buckling; 709. a limiting pipe; 710. a spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict.
As shown in fig. 1, 2, 3, and 4, an embodiment of the present invention discloses a photoelectric composite testing system, which includes a composite coiled tubing optical cable 1, a coiled tubing operation pry 2, an optical fiber demodulation instrument 3, and a blowout preventer 4, wherein the composite coiled tubing optical cable 1 can be lowered into a steam injection well or an oil-water well, and monitors and transmits temperature, pressure, and vibration data in the steam injection well or the oil-water well. Meanwhile, the optical fiber pressure sensor 5 and the high-temperature tester 6 are arranged at the end part of the composite continuous tube optical cable 1, so that the underground temperature and pressure can be accurately measured.
In one embodiment, as shown in fig. 1 and 2, a coiled tubing work sled 2 is used to reel composite coiled tubing cable 1 to enable rapid pay-off and retrieval operations of composite coiled tubing cable 1. The optical fiber demodulator 3 is used for receiving the data information transmitted by the composite continuous pipe optical cable 1 and demodulating the data information into a signal which can be identified and calculated by a computer. The blowout preventer 4 is used for plugging a wellhead of a steam injection well or an oil-water well so as to prevent high-temperature fluid in the well from returning upwards, and meanwhile, the composite continuous pipe optical cable 1 can slide through the blowout preventer 4 and can realize dynamic and static sealing.
The photoelectric composite testing system in the embodiment monitors and transmits temperature, vibration and pressure data in the well by using the composite continuous tube optical cable 1, and can realize real-time monitoring and acquisition of information of the whole well section, thereby improving the data acquisition range. Moreover, the composite continuous pipe optical cable 1, the optical fiber pressure sensor 5 and the high-temperature tester 6 are matched for use, so that the transmission and sensing integration is realized, the high-temperature tester 6 is utilized to accurately test parameters such as underground temperature and pressure, the test data and the optical fiber test data are contrastively analyzed and mutually verified, the underground data acquired by the composite test method is more accurate and comprehensive, and the measurement accuracy is further improved.
In one embodiment, as shown in fig. 1 and fig. 2, the components of the composite coiled tubing optical cable 1, the blowout preventer 4, the optical fiber pressure sensor 5, the high temperature tester 6, and the like are made of high temperature and high pressure resistant materials, so as to ensure that the apparatus can still normally work under high temperature and high pressure, thereby improving the temperature resistance.
The optical fiber resistant pressure sensor 5 realizes pressure monitoring by applying a Fabry-Perot interference principle, and has the characteristics of high temperature resistance (350 ℃), high pressure resistance (35 MPa), small volume, light weight, real-time data transmission through optical fibers and the like. The high-temperature tester 6 can measure the temperature, pressure, flow, magnetic positioning and natural gamma data of the steam injection well, can accurately test the temperature, pressure, flow, magnetic positioning and natural gamma data of any point in the well and store the data, and can form a set of photoelectric composite testing system by effectively combining with the composite continuous pipe optical cable 1 so as to obtain more accurate and comprehensive data in the well.
In one embodiment, as shown in fig. 1 and 3, the composite coiled tubing optical cable 1 comprises a coiled tubing 11, a protective layer 12 and an optical cable assembly 13 which are arranged from outside to inside in sequence, wherein the optical cable assembly 13 is used for monitoring and transmitting temperature, pressure and vibration data in a well. The protective layer 12 includes an inner protective steel tube 121 and an outer protective steel tube 122, and the optical cable assembly 13 is located inside the inner protective steel tube 121 to achieve effective protection of the optical cable assembly 13.
In one embodiment, as shown in fig. 1 and 3, the coiled tubing 11 may be made of 13Cr, 2205, 2507 or ST90 alloy material and has an outer diameter of 31.8 mm to 88.9mm. The outer protection steel pipe 122 is made of 825 or 625 alloy and has an outer diameter phi of 6.34-6.35 mm, and the inner protection steel pipe 121 is made of stainless steel and has an outer diameter phi of 3.99-4.01 mm, so that the optical fiber assembly is effectively protected.
By using the rigidity of the coiled tubing 11, the testing system can measure and work at any inclination angle even under a horizontal well, and can be recovered to the ground by using the flexibility of the coiled tubing 11 when the work is finished, so that the testing system has the characteristics of higher efficiency, higher safety and lower operation cost.
In one embodiment, as shown in fig. 1 and 3, the optical cable assembly 13 includes a protective layer 131 made of rubber, a single-film optical fiber 132 and a multi-film optical fiber 133 are disposed inside the protective layer 131, the single-film optical fiber 132 is used for distributed monitoring and transmission of pressure signals and acoustic vibration signals of the whole well, and the multi-film optical fiber 133 is used for distributed monitoring and transmission of temperature signals of the whole well.
In one embodiment, as shown in fig. 1 and 3, the single-film optical fiber 132 includes a single-film pressure measuring optical fiber 1321 and a single-film vibration optical fiber 1322, the single-film pressure measuring optical fiber 1321 is used for distributed monitoring and transmission of pressure signals of the whole well section, and the single-film vibration optical fiber 1322 is used for distributed monitoring and transmission of acoustic vibration signals of the whole well section. The multi-film optical fiber 133 includes a dual-film temperature measuring optical fiber 1331, and the dual-film temperature measuring optical fiber 1331 is used for distributed monitoring and transmission of temperature signals of the whole well section.
In one embodiment, as shown in fig. 1 and 3, the fiber optic demodulator 3 includes a distributed temperature demodulator 31, a pressure demodulator 32, and a distributed acoustic vibration demodulator 33, the distributed temperature demodulator 31 is connected to the dual-membrane temperature measurement fiber 1331, the pressure demodulator 32 is connected to the single-membrane pressure measurement fiber 1321 and the fiber optic pressure sensor 5, respectively, and the distributed acoustic vibration demodulator 33 is connected to the single-membrane vibration fiber 1322.
The distributed temperature demodulator 31 and the double-film temperature measurement optical fiber 1331 are used in combination, the distributed real-time measurement of the temperature of the whole underground well section can be realized, and the temperature measurement technical indexes can reach: the temperature measuring range is-20 to 400 ℃, the temperature measuring precision is +/-0.2 ℃, the temperature measuring resolution is 0.1 ℃, and the positioning precision is 0.5m.
The pressure demodulator 32 is used in combination with the single-film pressure measuring optical fiber 1321 and the optical fiber pressure sensor 5, so that the pressure in the well can be monitored in real time, and the pressure measuring technical indexes can reach: the pressure measuring range is 0-35 Mpa, the pressure measuring precision reaches 0.1 percent FS, and the pressure measuring resolution is 0.1psi.
The distributed acoustic vibration demodulator 33 and the single-membrane vibration optical fiber 1322 are used in combination, the underground full-well-section acoustic vibration distributed real-time measurement can be realized, and the vibration measurement technical indexes can reach: the test frequency range is 5-10 kHz, the spatial resolution is 2m, the maximum measurement range is 40km, and the positioning accuracy is +/-4 m.
In one embodiment, as shown in fig. 1 and 4, an encapsulation protection device 7 is arranged at the end of the composite continuous pipe optical cable 1, and the optical fiber pressure sensor 5 is positioned in the encapsulation protection device 7 to protect the optical fiber pressure sensor 5. Meanwhile, the high temperature tester 6 is screwed to the tail end of the encapsulation protection device 7.
In one embodiment, as shown in fig. 1 and 4, the packaging protection device 7 comprises a sealing joint 701 and a supporting outer cylinder 702 which are connected with each other, the sealing joint 701 is connected with the coiled tubing 11, the optical fiber pressure sensor 5 is arranged inside the supporting outer cylinder 702, and the high temperature tester 6 is connected to the end of the supporting outer cylinder 702.
In one embodiment, as shown in fig. 1 and 4, a ferrule 703 is disposed at one end of the sealing joint 701 close to the coiled tubing 11, the outer protective steel tube passes through the ferrule 703, and the outer protective steel tube 122 is slightly and controllably deformed by the double-retainer structure of the ferrule 703, so as to realize the first layer of all-metal sealing.
In one embodiment, as shown in fig. 1 and 4, a pressure bearing pad 704, flexible graphite 705, a compression pad 706 and a compression nut 707 are sequentially arranged inside the sealing joint 701, the flexible graphite 705 is tightly clamped by the compression nut 707 and the sealing joint 701, and the flexible graphite 705 is deformed, so that the sealing joint 701 and the outer protective steel pipe 122 realize non-metal sealing.
In one embodiment, as shown in fig. 1 and 4, a buckle 708, a limiting pipe 709 and a spring 710 are sequentially arranged in the support outer cylinder 702, the optical fiber pressure sensor 5 is located between the limiting pipe 709 and the spring 710, one end of the limiting pipe 709 abuts against the bayonet, the other end abuts against the optical fiber pressure sensor 5, meanwhile, one end of the pressing spring 710 abuts against the optical fiber pressure sensor 5, and the other end abuts against the high temperature tester 6, so that the functions of positioning and buffer protection of the optical fiber pressure sensor 5 are realized.
As shown in fig. 1, fig. 2, fig. 3, and fig. 4, the embodiment of the present invention further discloses a testing method, using the above-mentioned photoelectric composite testing system, including the following steps:
s1, placing all the devices, connecting pipelines, assembling a photoelectric composite test system, debugging the composite continuous tube optical cable 1, the optical fiber demodulator 3, the optical fiber pressure sensor 5 and the high-temperature tester 6, and ensuring that optical fiber test signals are normal and the high-temperature tester 6 works normally.
S2, installing the blowout preventer 4 at a wellhead, and injecting nitrogen into the blowout preventer 4 through a nitrogen injection system to block high-temperature fluid in the well from returning upwards.
S3, the composite coiled tubing optical cable 1, the optical fiber pressure sensor 5 and the high-temperature tester 6 are placed into the well through the coiled tubing operation pry 2, and the optical fiber pressure sensor 5 and the high-temperature tester 6 are enabled to reach the designated positions.
And S4, monitoring and transmitting the temperature, vibration and pressure data of the whole well section by using the composite continuous tube optical cable 1, and simultaneously, automatically testing the temperature and pressure in the well and storing information by using the high-temperature tester 6 and the optical fiber pressure sensor 5.
And S5, stopping testing, recycling the composite continuous pipe optical cable 1, the optical fiber pressure sensor 5 and the high-temperature tester 6 through the continuous pipe operation pry 2, and then replaying test data to finish the testing.
Compared with a test system in the related art, the test system has the advantages that the optical fiber structure is integrated in the coiled tubing 11, underground test is realized by connecting the bottom of the coiled tubing 11 with a test instrument, the rigidity of the coiled tubing 11 can be used for measuring and operating at any inclination angle or even a horizontal well underground, the flexibility of the coiled tubing 11 can be used for recovering the coiled tubing 11 to the ground when the operation is finished, and the test system has the advantages of being large in application range, capable of being repeatedly used, simple and fast in operation
Meanwhile, in order to meet the harsh underground steam injection conditions (steam injection temperature is 350 ℃, and steam injection pressure is 21 MPa) of the offshore heavy oil thermal recovery steam injection well, the composite continuous pipe optical cable 1, the blowout preventer 4, the optical fiber pressure sensor 5 and the like are made of special materials and structures to meet the requirements of the use environment, have the characteristics of high temperature resistance and high pressure resistance, and meet the requirements of safety.
Moreover, the optical fiber is used for realizing the characteristics of 'transmission' and 'sensing' in an optical mode, and the real-time monitoring of the wellbore pressure at the distributed measurement and monitoring position of the temperature field and the sound wave vibration field along the optical fiber is realized according to the backward Raman scattering effect and the optical time domain reflection technology, so that the temperature and sound wave vibration profile test and the fixed point pressure monitoring of the whole well section are realized.
Meanwhile, the high-temperature tester 6 and the optical fiber pressure sensor 5 are adopted to accurately test parameters such as underground temperature, pressure and vibration, the test data and the optical fiber test data are contrastively analyzed and mutually verified, photoelectric composite test is achieved, more accurate and comprehensive underground data are obtained, and therefore the measurement accuracy is improved.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An optoelectronic compound test system, comprising:
the composite continuous pipe optical cable (1) is used for monitoring and transmitting temperature, pressure and vibration data in a steam injection well or an oil-water well, and an optical fiber pressure sensor (5) and a high-temperature tester (6) are arranged at the end part of the composite continuous pipe optical cable (1);
the continuous tube operation pry (2) is used for retracting the composite continuous tube optical cable (1);
the optical fiber demodulator (3) is used for receiving the data information transmitted by the composite continuous pipe optical cable (1) and demodulating the data information into a signal which can be identified and calculated by a computer;
the blowout preventer (4) is used for plugging the wellhead of a steam injection well or an oil-water well, and the composite coiled tubing optical cable (1) can slide through the blowout preventer (4) and realize dynamic and static sealing.
2. The photoelectric composite testing system of claim 1, wherein the composite coiled tubing optical cable (1) comprises a coiled tubing (11), a protective layer (12) and an optical cable assembly (13) which are arranged from outside to inside in sequence, and the optical cable assembly (13) is used for monitoring and transmitting temperature, pressure and vibration data in a well.
3. The optoelectrical composite testing system of claim 2, wherein the protective layer (12) comprises an inner protective steel tube (121) and an outer protective steel tube (122), and the optical cable assembly (13) is located inside the inner protective steel tube (121).
4. The photoelectric composite testing system of claim 2, wherein the optical cable assembly (13) comprises a protective layer (131), and a single-film optical fiber (132) and a multi-film optical fiber (133) which are respectively arranged in the protective layer (131), the single-film optical fiber (132) is used for distributed monitoring and transmission of pressure signals and acoustic vibration signals of the whole well section, and the multi-film optical fiber (133) is used for distributed monitoring and transmission of temperature signals of the whole well section.
5. The photoelectric composite testing system of claim 4, wherein the single-film optical fiber (132) comprises a single-film pressure measuring optical fiber (1321) and a single-film vibration optical fiber (1322), the single-film pressure measuring optical fiber (1321) is used for carrying out distributed monitoring and transmission on the pressure signal of the whole well section, and the single-film vibration optical fiber (1322) is used for carrying out distributed monitoring and transmission on the sound wave vibration signal of the whole well section.
6. The optoelectronic composite testing system of claim 5, wherein the multi-film optical fiber (133) comprises a dual-film temperature measuring optical fiber (1331), and the dual-film temperature measuring optical fiber (1331) is used for distributed monitoring and transmission of temperature signals of the whole well section.
7. The optoelectrical composite test system of claim 6, wherein the optical fiber demodulator (3) comprises a distributed temperature demodulator (31), a pressure demodulator (32), and a distributed acoustic vibration demodulator (33), the distributed temperature demodulator (31) is connected to the double-membrane thermometric optical fiber (1331), the pressure demodulator (32) is connected to the single-membrane pressure measuring optical fiber (1321) and the optical fiber pressure sensor (5), respectively, and the distributed acoustic vibration demodulator (33) is connected to the single-membrane vibration optical fiber (1322).
8. The optoelectrical composite test system of claim 1, wherein an encapsulation protection device (7) is disposed at an end of the composite continuous tube optical cable (1), the optical fiber pressure sensor (5) is located in the encapsulation protection device (7), and the high temperature tester (6) is disposed at a tail end of the encapsulation protection device (7).
9. The optoelectrical composite test system of claim 8, wherein the high temperature tester (6) is screwed to a tail end of the encapsulation protection device (7).
10. A testing method using the optoelectric composite test system according to any one of claims 1 to 9, comprising the steps of:
s1, connecting equipment, debugging a composite continuous tube optical cable (1), an optical fiber demodulator (3), an optical fiber pressure sensor (5) and a high-temperature tester (6), and ensuring that an optical fiber test signal is normal and the high-temperature tester (6) works normally;
s2, injecting nitrogen into the blowout preventer (4) through a nitrogen injection system to block high-temperature fluid in the well from returning upwards;
s3, lowering the composite coiled tubing optical cable (1), the optical fiber pressure sensor (5) and the high-temperature tester (6) into the well through the coiled tubing operation pry (2);
s4, the composite continuous tube optical cable (1) starts to monitor and transmit temperature, vibration and pressure data of the whole well section, and meanwhile, the high-temperature tester (6) and the optical fiber pressure sensor (5) start to automatically test the temperature and the pressure in the well and store information;
and S5, stopping testing, and recovering the composite continuous pipe optical cable (1), the optical fiber pressure sensor (5) and the high-temperature tester (6) through the continuous pipe operation pry (2) to replay test data.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118432708A (en) * | 2024-07-02 | 2024-08-02 | 高勘(广州)技术有限公司 | Optical sensing communication terminal testing method and testing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118432708A (en) * | 2024-07-02 | 2024-08-02 | 高勘(广州)技术有限公司 | Optical sensing communication terminal testing method and testing system |
| CN118432708B (en) * | 2024-07-02 | 2024-08-30 | 高勘(广州)技术有限公司 | Optical sensing communication terminal testing method and testing system |
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