CN212985199U - Distributed optical fiber underground monitoring device - Google Patents
Distributed optical fiber underground monitoring device Download PDFInfo
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- CN212985199U CN212985199U CN202021501789.6U CN202021501789U CN212985199U CN 212985199 U CN212985199 U CN 212985199U CN 202021501789 U CN202021501789 U CN 202021501789U CN 212985199 U CN212985199 U CN 212985199U
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Abstract
The utility model relates to a distributed optical fiber underground monitoring device, including ground equipment, downhole tool equipment and photoelectric composite cable, downhole tool equipment includes mounting bracket and a plurality of parameter acquisition module, is equipped with an installation section of thick bamboo on the mounting bracket, and a plurality of parameter acquisition module are installed in an installation section of thick bamboo, and the both ends of an installation section of thick bamboo are equipped with the collar, and the collar suit is in the outer wall of oil well sleeve pipe, is equipped with the retaining member on the collar; be equipped with cable and optical cable in the photoelectric composite cable, the one end and the ground equipment of optical cable are connected, and the other end is laid along oil well sheathed tube's outer wall, and the one end and the ground equipment of cable are connected, and the other end is connected with parameter acquisition module, and ground equipment includes DAS equipment, DTS equipment, DOVS equipment, host computer. A plurality of parameter acquisition module integrated level is high, expansibility is strong, and the temperature, pressure, flow, moisture, density isoparametric single-point measurement accuracy on single purpose layer are high, and the installation of being convenient for, can once accomplish a plurality of parameter acquisition module's installation through the mounting bracket.
Description
Technical Field
The utility model relates to a drunkenness monitoring field in the pit, in particular to distributing type optic fibre monitoring devices in pit.
Background
Control of fluids in the wellbore and the formation is a primary task at various stages in the life cycle of the well. If uncontrolled fluid flow occurs, the well may not be physically and functionally complete, potentially leading to serious and even catastrophic results, and therefore downhole blow-by conditions may need to be monitored.
The optical fiber permanent type underground temperature and pressure and other multiparameter monitoring device is permanently installed in an oil well, monitors underground temperature, pressure and other multiparameters in real time in the whole service life of the oil well, and has the function of transmitting measured parameter data to a ground demodulator in real time for display and storage. The method has the advantages that parameter data such as underground temperature, pressure and vibration are monitored in real time, production engineers and oil reservoir analysts can be helped to carry out work such as real-time production optimization, timely fault diagnosis and dynamic understanding of oil reservoir change trends, and the method is an important decision basis for planning oil reservoirs and making production tasks. The optical fiber permanent underground monitoring device breaks through the design of the traditional electronic logging equipment, and adopts the optical fiber sensor to monitor multiple parameters such as underground temperature, pressure and the like in real time. The monitoring system has the remarkable characteristics of high precision, long service life, high long-term working temperature, no electromagnetic interference, small potential safety hazard (an underground component is passive), long transmission distance and the like.
However, the conventional monitoring device collects multiple parameters such as temperature, pressure and the like in a one-by-one separated collection mode, a plurality of collected sensors are installed outside an oil well casing one by one and are finally sealed in a cement ring outside the oil well casing one by one, the installation and operation are complicated, and inaccurate collection of the parameters such as temperature, pressure and the like of a single target layer is caused, so that the conventional monitoring device needs to be improved.
Disclosure of Invention
A distributed optical fiber underground monitoring device integrates sensors for collecting parameters such as temperature, pressure, flow, water content and density, adopts a modular structure design, can finish the installation of a plurality of sensors for collecting parameters at one time, and can accurately collect parameters such as temperature and pressure of a single target layer; the optical fiber is implanted underground, and various parameters such as the oil well, the underground environment, the stratum environment and the like are monitored by utilizing the characteristics of the optical fiber, so that real-time continuous monitoring of the whole well section is realized, the inaccuracy and the complexity of repeated operation of conventional logging single-point measurement are overcome, and the current logging process is finally simplified and replaced; the intelligent and big data logging monitoring is realized, and more accurate guidance is provided for oil well exploitation and diagnosis.
The utility model relates to a distributed optical fiber underground monitoring device, which comprises ground equipment, underground tool equipment and a photoelectric composite cable,
the underground tool equipment comprises a mounting frame and a plurality of parameter acquisition modules, wherein the mounting frame is provided with a mounting cylinder, the parameter acquisition modules are mounted in the mounting cylinder, two ends of the mounting cylinder are provided with mounting rings, the mounting rings are sleeved on the outer wall of an oil well casing, and locking parts are arranged on the mounting rings;
and a cable and an optical cable are arranged in the photoelectric composite cable, one end of the optical cable is connected with ground equipment, the other end of the optical cable is laid along the outer wall of the oil well casing, one end of the cable is connected with the ground equipment, and the other end of the cable is connected with the parameter acquisition module.
Further, the optical cable is fixed on the outer wall of the oil well casing through the optical cable protector.
Further, the ground equipment comprises DAS equipment, DTS equipment, DOVS equipment and an upper computer.
Furthermore, the optical cable is arranged in the center inside the photoelectric composite cable, the outer portion of the optical cable is wrapped with inner armor in a surrounding mode, the outer portion of the inner armor is wrapped with a plurality of cables in a surrounding mode, the outer portion of the cables is wrapped with outer armor in a surrounding mode, the outer portion of the outer armor is wrapped with a leather sheath in a surrounding mode, and the inner armor and the outer armor are of a multi-strand surrounding steel wire structure.
Furthermore, the cable fixing device also comprises a cable fixing component, wherein the cable fixing component comprises an outer sleeve and an inner sleeve, the outer sleeve and the inner sleeve are both of hollow structures, an inner cavity is arranged at the lower part of the outer sleeve, a first conical surface is arranged inside the inner cavity, a second conical surface matched with the first conical surface is arranged outside the inner sleeve,
the inner sleeve is sleeved inside the inner cavity, the outer sleeve is installed on the adapter at the upper end of the installation cylinder, and the bottom of the inner sleeve is tightly attached to the top of the adapter.
Further, still install the copper pad between inner skleeve and the adapter, be equipped with the through-hole on the copper pad, the outer sleeve is connected for buckle structure with the adapter.
Furthermore, a plug is arranged at the bottom of the mounting cylinder, and a plug through hole is formed in the plug.
Further, a plurality of parameter acquisition modules connect gradually through telecommunication adapter, telecommunication adapter includes a plurality of contact pins, the outside parcel of contact pin has the insulating layer, telecommunication adapter installs on module joint, module joint installs in installation section of thick bamboo inner wall, module joint border is equipped with the water hole.
Further specifically, the plurality of parameter acquisition modules include a temperature acquisition module, a pressure acquisition module, a flow acquisition module, a moisture content acquisition module, and a density acquisition module.
Preferably, the optical cable is a multicore optical fiber.
A distributed optical fiber downhole monitoring device has the following advantages:
1. the multiple parameter acquisition modules are high in integration level and strong in expansibility, the single-point measurement accuracy of parameters such as temperature, pressure, flow, water content and density of a single target layer is high, the installation is convenient, and the installation of the multiple parameter acquisition modules can be completed at one time through the installation frame;
2. the service life is long, and the outer armor of the photoelectric composite cable is fixed through the cable fixing component, so that the cable is not easy to pull off and damage; the monitoring is comprehensive, the quality of a shaft is monitored, sudden changes (casing damage casing changes, outside pipe channeling and perforation) of the underground environment are monitored, and the position of a fault is positioned;
3. carry out the single-point monitoring to the oil well casing outside through a plurality of data acquisition modules, adopt distributed optical fiber to carry out whole journey monitoring to the oil well casing outside, the optical cable is gathered the situation of change of oil well casing external environment, and the signal decay of light signal in the optical cable reduces, and easy network deployment scalability is good, the good reliability: sensing components and parts are small in quantity in the pit, and simple structure has avoided the interference of multiring section, and system reliability is strong, does not receive electromagnetic interference: adopt optical sensing technology, the system is partly does not have electron device and circuit in the pit, and optical sensor is not influenced by electromagnetic interference completely, and high temperature resistant stability is high: the maximum working temperature is 370 ℃, the temperature drift is less than or equal to 0.1 (centigrade per year), and the pressure drift is less than or equal to 0.02Mpa per year.
Drawings
FIG. 1 is a schematic diagram of a distributed optical fiber downhole monitoring device after installation and sealing;
FIG. 2 is a schematic view of the installation structure of the well casing and the mounting frame;
FIG. 3 is a schematic cross-sectional view of a composite optical/electrical cable;
fig. 4 is a schematic view of a connection structure of the cable fixing assembly and the mounting cylinder (the arrow in the figure indicates the water flow direction).
The system comprises 1-ground equipment, 2-downhole tool equipment, 3-photoelectric composite cable, 4-mounting rack, 5-parameter acquisition module, 6-mounting barrel, 7-mounting ring, 8-oil well casing, 9-locking piece, 10-cable, 11-optical cable, 12-DAS equipment, 13-DTS equipment, 14-DOVS equipment, 15-inner armor, 16-outer armor, 17-leather sheath, 18-cable fixing component, 19-outer sleeve, 20-inner sleeve, 21-inner cavity, 22-first conical surface, 23-second conical surface, 24-copper pad, 25-through hole, 26-buckle structure, 27-telecommunication adapter, 28-contact pin, 29-module joint, 30-water through hole, 31-adapter, 32-insulating layer, 33-plug.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
Example 1:
the utility model relates to a distributed optical fiber underground monitoring device, which comprises ground equipment, underground tool equipment and a photoelectric composite cable,
the underground tool equipment comprises a mounting frame and a plurality of parameter acquisition modules, the parameter acquisition modules are subjected to waterproof treatment, the treatment mode comprises mounting of a sealing shell or waterproof packaging, a mounting cylinder is arranged on the mounting frame, the parameter acquisition modules are mounted in the mounting cylinder, mounting rings are arranged at two ends of the mounting cylinder and sleeved on the outer wall of an oil well casing pipe, and locking pieces are arranged on the mounting rings and are bolts and nuts and used for locking the mounting rings on the oil well casing pipe;
and a cable and an optical cable are arranged in the photoelectric composite cable, one end of the optical cable is connected with ground equipment, the other end of the optical cable is laid along the outer wall of the oil well casing, one end of the cable is connected with the ground equipment, and the other end of the cable is connected with the parameter acquisition module.
The ground equipment comprises DAS equipment, DTS equipment, DOVS equipment and an upper computer.
The optical cable is arranged in the center inside the photoelectric composite cable, the inner armor is wrapped outside the optical cable in a surrounding mode, the plurality of cables are wrapped outside the inner armor in a surrounding mode, the outer armor is wrapped outside the plurality of cables in a surrounding mode, the outer armor is wrapped outside the outer armor in a surrounding mode, and the inner armor and the outer armor are of multi-strand surrounding steel wire structures.
A plurality of parameter acquisition modules connect gradually through telecommunication adapter, telecommunication adapter includes a plurality of contact pins, the outside parcel of contact pin has the insulating layer, and the insulating layer is the rubber material, telecommunication adapter installs on module joint, module joint installs in installation section of thick bamboo inner wall, module joint border is equipped with the water hole, a plurality of parameter acquisition modules include temperature acquisition module, pressure acquisition module, flow acquisition module, water content acquisition module, the optical cable is multicore optic fibre.
When the device is used, the mounting ring is sleeved on the outer wall of the oil well casing pipe, the downhole tool equipment is fixed at a proper position on the oil well casing pipe through the locking piece, the position can be selected according to the depth of a specific stratum to be monitored, the photoelectric composite cable is mounted along the outer wall of the oil well casing pipe, when reaching the position of the downhole tool equipment, the photoelectric composite cable is broken, the cable is connected into the mounting cylinder, and the optical cable is fixed on the outer wall of the casing pipe through the optical cable protector and continues to be mounted along the outer wall of the. After the arrangement of the photoelectric composite cable is completed, the photoelectric composite cable and underground tool equipment are put into the underground along with the sleeve, after the sleeve is completely put into the underground, the on-off condition of the optical cable is detected through ground equipment, and after no abnormity occurs, the well cementation operation is completed by cement. And after penetrating through the Christmas tree by passing through the sealing device, the optical cable at the ground end is respectively connected with ground equipment, so that the real-time monitoring of multiple parameters such as temperature, pressure and the like of the whole underground well section can be carried out.
Example 2
As shown in fig. 1-4, the distributed optical fiber downhole monitoring device of the present invention comprises surface equipment, downhole tool equipment and a photoelectric composite cable,
the underground tool equipment comprises a mounting frame and a plurality of parameter acquisition modules, wherein the mounting frame is provided with a mounting cylinder, the parameter acquisition modules are mounted in the mounting cylinder, two ends of the mounting cylinder are provided with mounting rings, the mounting rings are sleeved on the outer wall of an oil well casing, and locking parts are arranged on the mounting rings;
and a cable and an optical cable are arranged in the photoelectric composite cable, one end of the optical cable is connected with ground equipment, the other end of the optical cable is laid along the outer wall of the oil well casing, one end of the cable is connected with the ground equipment, and the other end of the cable is connected with the parameter acquisition module.
The ground equipment comprises DAS equipment, DTS equipment, DOVS equipment and an upper computer (not shown in the figure), the optical cable is a multi-core optical fiber, wherein the DAS equipment, the DTS equipment and the DOVS equipment are connected with part of the multi-core optical fiber in the optical cable, the DOVS equipment is used for long-distance vibration measurement monitoring, the DTS equipment is used for distributed temperature measurement, the DAS equipment is used for short-distance vibration measurement monitoring, the precision and the sensitivity are high, and the DAS equipment is used for parameter monitoring of the whole well section of the environment outside the oil well casing; the upper computer is connected with the parameter acquisition modules through cables and is used for carrying out single-point monitoring on the environment outside the oil well casing.
The optical cable is arranged in the center inside the photoelectric composite cable, the inner armor is wrapped outside the optical cable in a surrounding mode, the plurality of cables are wrapped outside the inner armor in a surrounding mode, the outer armor is wrapped outside the plurality of cables in a surrounding mode, the outer armor is wrapped outside the outer armor in a surrounding mode, and the inner armor and the outer armor are of multi-strand surrounding steel wire structures.
Still include the fixed subassembly of cable, the fixed subassembly of cable includes outer sleeve, inner skleeve, outer sleeve, inner skleeve are hollow structure, the outer sleeve lower part is equipped with the inner chamber, the intracavity portion is equipped with first conical surface, the inner skleeve outside be equipped with first conical surface complex second conical surface, the inner skleeve cup joints in the intracavity portion, the outer sleeve is installed on the adapter of installation section of thick bamboo upper end, the bottom of inner skleeve is hugged closely in the top of adapter, and the adapter passes through threaded structure with the installation section of thick bamboo and is connected.
Still install the copper pad between inner skleeve and the adapter, be equipped with the through-hole on the copper pad, in this embodiment, the quantity of copper pad is 3, the outer sleeve is connected for buckle structure with the adapter, and after the cable passed the hollow structure of outer sleeve, inner skleeve, tear the separation broken with cable and outer armour, the steel wire structure circuitous laying of outer armour is between first conical surface and second conical surface, because the copper pad has better ductility, under the buckle structure effort of outer sleeve and adapter for the steel wire structure of outer armour is locked between first conical surface and second conical surface, prevents that the cable atress is broken under the effect of external force.
A plurality of parameter acquisition modules connect gradually through the telecommunication adapter, the telecommunication adapter includes a plurality of contact pins, the outside parcel of contact pin has the insulating layer, the telecommunication adapter is installed on the module adapter, the module joint is installed in installation section of thick bamboo inner wall, the module joint border is equipped with the water hole, and the installation section of thick bamboo inner wall is equipped with the draw-in groove (not shown in the figure) that is used for the module to connect the installation, and a plurality of module joint are fixed mounting in the installation section of thick bamboo after through telecommunication adapter electric connection, and the telecommunication adapter includes a set of power and a set of communication bus at least, and the power is used for the power supply of a plurality of parameter acquisition modules, and communication bus is used for data transmission to the ground equipment that a plurality of parameter. The photoelectric composite cable is located on the broken rear of dismantling of the upper portion of the adapter, the cable and the outer armor sequentially penetrate through the outer sleeve, the inner sleeve and the copper pad, gaps of 2-3mm are formed among the cable, the outer sleeve, the inner sleeve and the copper pad, water of the intra-annular channeling of cement flows into the installation cylinder through the gaps, then flows through the water holes through the parameter acquisition modules, and finally flows out of the bottom of the installation cylinder, so that water inside the installation cylinder is communicated with a water path of the intra-annular channeling of the cement, a plug is arranged at the bottom of the installation cylinder, and a plug through hole is formed in the. The broken optical cable and the inner armor are continuously laid along the oil well casing for vibration monitoring of the surrounding environment of the oil well pipeline. And data such as temperature, pressure, vibration and the like are transmitted to equipment such as ground DAS equipment, DTS equipment and DOVS equipment through the photoelectric composite cable for analysis and image processing.
The plurality of parameter acquisition modules comprise a temperature acquisition module, a pressure acquisition module, a flow acquisition module, a water content acquisition module and a density acquisition module.
Example 3
The present embodiment is different from embodiment 2 in that:
the collar is staple bolt structure in this embodiment, and ground equipment still includes ground data analysis equipment and storage device for the analysis and the storage of data acquisition, through in implanting the many mouthfuls of oil wells in the regional well site with the optical cable of distributing type, collect the analysis with data, can realize carrying out dynamic monitoring to whole region, provide the most accurate big data support for the diagnostic analysis of regional oil well improvement.
The rest is the same as in example 2.
Claims (8)
1. A distributed optical fiber underground monitoring device is characterized by comprising ground equipment, underground tool equipment and a photoelectric composite cable,
the underground tool equipment comprises a mounting frame and a plurality of parameter acquisition modules, wherein the mounting frame is provided with a mounting cylinder, the parameter acquisition modules are mounted in the mounting cylinder, two ends of the mounting cylinder are provided with mounting rings, the mounting rings are sleeved on the outer wall of an oil well casing, and locking parts are arranged on the mounting rings;
and a cable and an optical cable are arranged in the photoelectric composite cable, one end of the optical cable is connected with ground equipment, the other end of the optical cable is laid along the outer wall of the oil well casing, one end of the cable is connected with the ground equipment, and the other end of the cable is connected with the parameter acquisition module.
2. A distributed fibre optic downhole monitoring device according to claim 1 in which: the ground equipment comprises DAS equipment, DTS equipment, DOVS equipment and an upper computer.
3. A distributed fibre optic downhole monitoring device according to claim 1 or 2, wherein: the optical cable is arranged in the center inside the photoelectric composite cable, the inner armor is wrapped outside the optical cable in a surrounding mode, the plurality of cables are wrapped outside the inner armor in a surrounding mode, the outer armor is wrapped outside the plurality of cables in a surrounding mode, the outer armor is wrapped outside the outer armor in a surrounding mode, and the inner armor and the outer armor are of multi-strand surrounding steel wire structures.
4. A distributed fibre optic downhole monitoring device according to claim 3 in which: the cable fixing component comprises an outer sleeve and an inner sleeve, the outer sleeve and the inner sleeve are both of a hollow structure, an inner cavity is formed in the lower portion of the outer sleeve, a first conical surface is arranged inside the inner cavity, a second conical surface matched with the first conical surface is arranged outside the inner sleeve,
the inner sleeve is sleeved inside the inner cavity, the outer sleeve is installed on the adapter at the upper end of the installation cylinder, and the bottom of the inner sleeve is tightly attached to the top of the adapter.
5. A distributed fibre optic downhole monitoring device according to claim 4 in which: still install the copper pad between inner sleeve and the adapter, be equipped with the through-hole on the copper pad, the outer sleeve is connected for buckle structure with the adapter.
6. A distributed fibre optic downhole monitoring device according to claim 5 in which: a plurality of parameter acquisition modules connect gradually through telecommunication adapter, telecommunication adapter includes a plurality of contact pins, the outside parcel of contact pin has the insulating layer, telecommunication adapter installs on module joint, module joint installs in installation section of thick bamboo inner wall, module joint border is equipped with the water hole.
7. A distributed fibre optic downhole monitoring device according to claim 6 in which: the plurality of parameter acquisition modules comprise a temperature acquisition module, a pressure acquisition module, a flow acquisition module, a water content acquisition module and a density acquisition module.
8. A distributed fibre optic downhole monitoring device according to claim 3 in which: the optical cable is a multi-core optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021501789.6U CN212985199U (en) | 2020-07-27 | 2020-07-27 | Distributed optical fiber underground monitoring device |
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| CN202021501789.6U CN212985199U (en) | 2020-07-27 | 2020-07-27 | Distributed optical fiber underground monitoring device |
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| CN212985199U true CN212985199U (en) | 2021-04-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658418A (en) * | 2022-04-29 | 2022-06-24 | 西安石竹能源科技有限公司 | Electric position limiting instrument for underground optical cable azimuth locking |
| CN114737953A (en) * | 2022-04-29 | 2022-07-12 | 西安石竹能源科技有限公司 | Azimuth locking instrument for monitoring position of underground optical cable |
-
2020
- 2020-07-27 CN CN202021501789.6U patent/CN212985199U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658418A (en) * | 2022-04-29 | 2022-06-24 | 西安石竹能源科技有限公司 | Electric position limiting instrument for underground optical cable azimuth locking |
| CN114737953A (en) * | 2022-04-29 | 2022-07-12 | 西安石竹能源科技有限公司 | Azimuth locking instrument for monitoring position of underground optical cable |
| CN114658418B (en) * | 2022-04-29 | 2024-04-26 | 西安石竹能源科技有限公司 | Electric position limiting instrument for locking underground optical cable azimuth |
| CN114737953B (en) * | 2022-04-29 | 2024-04-26 | 西安石竹能源科技有限公司 | Direction locking instrument for monitoring position of underground optical cable |
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