CN213360096U - Oil well tubular column based on distributed monitoring and intelligent monitoring device thereof - Google Patents
Oil well tubular column based on distributed monitoring and intelligent monitoring device thereof Download PDFInfo
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- CN213360096U CN213360096U CN202022502840.1U CN202022502840U CN213360096U CN 213360096 U CN213360096 U CN 213360096U CN 202022502840 U CN202022502840 U CN 202022502840U CN 213360096 U CN213360096 U CN 213360096U
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Abstract
The utility model belongs to the technical field of the oil well pipeline, specific saying relates to an oil well tubular column and intelligent monitoring device based on distributed monitoring. It includes a plurality of pipeline sections through the packer division, the pipeline section sets up detection optic fibre for flexible composite pipe and inner liner and/or overcoat layer, set up distributed optical fiber sensor subassembly on the detection optic fibre, use above-mentioned oil well tubular column's intelligent monitoring device in oil recovery/water injection well pipeline include with the monitoring mechanism who surveys optical fiber connection, in the oil well was arranged in to the oil well tubular column, monitoring mechanism included laser emitter, detector and data processor. This oil well tubular column and intelligent monitoring device based on distributed monitoring has realized the full well section distributed logging control to the oil well, possesses information such as the pressure of real-time different well sections of gathering simultaneously, temperature, injection/production, provides accurate guidance for oil well intelligence water injection, oil recovery, has obviously improved single well recovery ratio, reduces single well injection cost.
Description
Technical Field
The utility model belongs to the technical field of the oil well pipeline, specific saying relates to an oil well tubular column and intelligent monitoring device based on distributed monitoring.
Background
At present, with the use of a nonmetal composite continuous pipe in the field of water injection and oil extraction of an oil field, the problems of corrosion, scaling and low construction efficiency of a traditional steel oil pipe are obviously improved, but the section conditions of each injection/extraction layer at the bottom of a well can not be monitored in real time in a general water injection mode or a multi-stage layered water injection/oil extraction mode, and only original logging information can be relied on.
The general method of the oil field is that after the well is stopped, a detection sensor is put in from the well mouth to detect information data such as temperature, pressure, water absorption and the like of different positions in the oil well, the method not only influences normal oil extraction operation, but also has larger difference between the measured data and the data in the actual production process due to the influence of factors such as bottom layer pressure, temperature, permeability and the like once the well is stopped, and has limited reference value for guiding the actual production.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a realize the full well section distributing type logging control to the oil well, possess information such as pressure, temperature, the injection/extraction of the different well sections of real-time acquisition simultaneously, for oil well intelligence water injection, oil recovery provide the guidance, obviously improve the individual well recovery ratio, reduce the novel oil well tubular column and the intelligent monitoring device of individual well injection cost.
In order to achieve the above object, the utility model adopts the following technical scheme:
an oil well tubular column based on distributed monitoring which characterized in that: the packer comprises a plurality of pipe sections divided by the packer, wherein the pipe sections are flexible composite pipes, detection optical fibers are arranged on an inner liner layer and/or an outer sleeve layer, and distributed optical fiber sensor assemblies are arranged on the detection optical fibers.
The additional technical features of the oil well string based on distributed monitoring further include:
-the optical fiber sensor assembly comprises a DTS sensor, a DAS sensor, a FBG sensor or an F-P cavity sensor and a modulator;
-the distance between the DTS sensors is between 0.2 and 2 meters;
the detection optical fibers are symmetrically and linearly laid along the axial direction of the pipeline or spirally wound and laid by taking the axial direction of the pipeline as a center;
a reinforcing layer is arranged between the inner liner layer and the outer sleeve layer of the pipe section, and the reinforcing layer is made of metal wires or a reinforcing fiber wire woven mesh or is formed by spirally winding the metal wires or the reinforcing fiber wires with the axial direction of the pipe as the center.
The utility model also provides an use the intelligent monitoring device of above-mentioned oil well tubular column in oil recovery/water injection well pipeline, its characterized in that: the monitoring mechanism is connected with the oil well pipe column and the detection optical fiber thereof; the oil well pipe column is arranged in an oil well, and the monitoring mechanism comprises a laser transmitter, a detector and a data processor.
The additional technical characteristics of the intelligent monitoring device for the oil extraction/water injection well pipeline further comprise:
the oil well pipe string is butted with a gathering and transportation pipeline outside the oil well through a pipeline joint, and the gathering and transportation pipeline and the pipe section of the oil well pipe string are the same pipe fittings;
-providing a flow control valve on each section of the well string, the flow control valve being electrically connected to the monitoring means.
The utility model provides an oil well tubular column and intelligent monitoring device compares with prior art based on distributed monitoring, has following advantage: firstly, because the novel oil well pipe column comprises a plurality of pipe sections divided by a packer, each pipe section is a flexible composite pipe, a lining layer and/or an outer sleeve layer is provided with a detection optical fiber, a distributed optical fiber sensor component is arranged on the detection optical fiber, the optical fiber sensor utilizes characteristic parameters (amplitude, phase, polarization state, wavelength and the like) representing light waves when the light waves are transmitted in the optical fiber to directly or indirectly change under the action of external factors (such as temperature, pressure, flow, sound change and the like of a transmission medium), and detects the size of each corresponding physical quantity according to the change relation of the parameters along with the external factors, compared with the traditional sensing element, the novel oil well pipe column has the outstanding advantages of small volume, light weight, electromagnetic interference resistance, corrosion resistance, high sensitivity and the like, the novel oil well pipe column can achieve wider measurement bandwidth by laying the detection optical fiber in the oil well pipe column, and the monitoring and analyzing electronic equipment can be far away, the distributed sensing network is convenient to form, the whole well section of the oil well is monitored in real time, abnormal information is fed back in time, potential safety hazards are discovered earlier, and guidance for construction first-aid repair is facilitated in advance; secondly, according to the conveying conditions of different media, the optical fiber sensor has various types, such as collecting temperature, pressure and noise signals in the pipeline running process, wherein the temperature signals can directly judge the temperature information of the conveying media in the pipeline body; the pressure signal can be combined with the expansion coefficient of the pipeline to calculate the conveying pressure in the pipe body; the noise signal can calculate information such as viscosity, air content, water content and the like of a conveying medium in the pipe body through a ground demodulator, and meanwhile, the condition of pipeline leakage can be indirectly judged through the enhancement of a local signal, so that the intelligent degree of the oil well pipe column is improved; thirdly, the intelligent monitoring device composed of the oil well pipe column, the monitoring mechanism is connected with the detecting optical fiber, the monitoring mechanism comprises a laser emitter, a detector and a data processor, the detecting optical fiber converts the pipeline detection variable into the optical characteristic, the optical fiber sensor sends the light from the light source into the modulator through the optical fiber, the optical property (such as the intensity, the wavelength, the frequency, the phase position, the partial normality and the like) of the light is changed after the interaction between the parameter to be detected and the light entering the modulation region, the signal light is called the modulated signal light, the modulated signal light is sent into the light detector through the detecting optical fiber, the modulated signal light is converted into the electric signal to be output, the parameter to be detected is obtained, the parameter is analyzed by the data processor, the valuable guiding information is obtained, the intelligent monitoring device is convenient for the detection and sensing multi-point multiplexing of the oil well pipe column, the, the method realizes multi-point real-time intelligent remote measurement, thereby improving the safety performance of the oil well pipeline.
Drawings
FIG. 1 is a schematic diagram of the cross-sectional structure of an oil well pipe column based on distributed monitoring of the present invention;
figure 2 is the utility model relates to an oil recovery/water injection well pipeline's intelligent monitoring device.
Detailed Description
The structure and the working principle of the oil well pipe column based on distributed monitoring and the intelligent monitoring device thereof provided by the utility model are further described in detail with the attached drawings.
Referring to fig. 1, for the utility model provides an oil well tubular column's schematic structure based on distributed monitoring. The structure of constituting this novel oil well tubular column includes a plurality of pipeline sections 11 through packer 10 division, and pipeline section 11 sets up detection optic fibre 3 for flexible composite pipe and inner liner 1 and/or overcoat layer 2, sets up distributed optical fiber sensor subassembly on the detection optic fibre 3.
The working principle is as follows: the detection optical fibers 3 are arranged in the inner liner 1 and/or the outer jacket 2 of each section of pipe section 11 of the oil well pipe column, the optical fiber sensors 31 are widely distributed on the detection optical fibers 3 to form real-time detection of the whole well section of the oil well pipe column, and various parameters such as medium flow, temperature, noise, pressure and the like are collected in time in the oil extraction/water injection operation process of an oil well to form a distributed monitoring network, so that the intelligent degree of the oil well pipe column is improved.
In the structure constituting the above-described distributed monitoring-based oil well string,
in order to improve the detection range of the detection optical fiber 3, the sensor of the optical fiber sensor 31 assembly has various options, such as a DTS (distributed temperature sensing) sensor, by monitoring the temperature change of each point on the optical fiber sensor 31; the DAS (distributed acoustic sensing) sensor can obtain noise and vibration information around any point along the optical cable in real time; the FBG sensor which changes the reflected light wave according to the change of the environmental temperature and/or strain, the F-P cavity sensor which can accurately detect the change of the ultrasonic wave and carry out the transmission noise analysis, and the like, wherein the optical fiber sensor 31 is matched with the modulator, when the abnormal change occurs around the detection optical fiber 3 and reaches a certain threshold range, the variable is converted into an optical signal and is transmitted out through the detection optical fiber 3, thereby being convenient for quickly and accurately positioning the position of an event and informing related monitoring personnel;
according to different using conditions of the oil well pipe column, a DTS sensor is preferably adopted on the pipeline, and the distance between adjacent detection points is 0.2-2 meters, so that the monitoring precision and the timeliness are met;
in order to realize the bending of the oil well pipe column, the detection optical fibers 3 are symmetrically and linearly laid along the axial direction of the pipeline, and after the pipeline is wound, the detection optical fibers 3 are arranged on two horizontal sides, so that the protection of the optical fiber sensor 31 is improved, or the detection optical fibers 3 are spirally wound and laid by taking the axial direction of the pipeline as the center, so that the detection length and the detection stability are further prolonged, and the monitoring range is wider;
preferably, the reinforcement layer 4 is arranged between the inner liner layer 1 and the outer jacket layer 2 of the pipe section 11, the reinforcement layer 4 is a woven mesh of metal wires or reinforced fiber wires or the reinforcement layer 4 is formed by spirally winding metal wires or reinforced fiber wires around the axial direction of the pipe, and can bear a large fluid pressure, according to different working conditions, the structure of the reinforcement layer 4 can keep sliding with the inner liner layer 1 and the outer jacket layer 2, or the material of the reinforcement layer 4 can be bonded with the inner liner layer 1 and the outer jacket layer 2 into a whole by means of heating or gluing, so as to prevent sliding when the pipe section is pressurized or bent.
The utility model also provides an intelligent monitoring device applying the oil well pipe column in the oil extraction/water injection well pipeline, which comprises the oil well pipe column and a monitoring mechanism 5 connected with the detection optical fiber 3; wherein the well string is placed in the well and the monitoring means 5 comprises a laser transmitter 51, a detector 52 and a data processor 53.
The laser transmitter 51 at the wellhead emits laser, the laser reaches each optical fiber sensor 31 in the well through the detection optical fiber 3, the optical fiber sensors 31 feed back information such as temperature, pressure, noise and the like on a reflection spectrum through an adjuster, the detector 52 at the wellhead receives the spectrum, data such as the temperature, the pressure, the noise and the like are obtained through demodulation, and the data are analyzed by the data processor 53 to obtain guidance of reference significance.
In the structure constituting the above-described intelligent monitoring apparatus,
preferably, the oil well pipe column is butted with a gathering and transportation pipeline a outside an oil well through a pipeline joint b, and the gathering and transportation pipeline a and a pipe section 11 of the oil well pipe column are the same pipe fitting, so that the real-time and overall process monitoring of the overall process of oil extraction and oil transportation of the oil field is realized, and the construction requirements of a digital oil field and an intelligent oil field are met;
it should be noted that, the gathering and transportation pipeline a is connected with the pipe section 11 of the oil well pipe string by the special joint b (the specific form of the special joint is disclosed in the utility model with the patent number of CN 210404618U), namely, the pipeline butt joint is realized, the signal optical fiber communication can be carried out through the integrated socket, the whole encapsulation protection is realized, the signal of the pipe end is led out through the detection optical fiber 3 at the signal acquisition part (the optical fiber sensor 31), the acquired optical signal is converted into electronic data through the detector 52 (the signal demodulator) on the ground, the analysis is carried out through the data processor 53 (the single chip microcomputer or the upper computer), and guidance is provided for the oil extraction/water injection operation.
In order to facilitate the actual production regulation, each pipe section 11 of the oil well pipe column is provided with a flow control valve c which is electrically connected with the monitoring mechanism 5 and used for controlling water injection of the oil well pipe column according to monitoring data;
in a specific embodiment, according to actual working conditions, 1-8 stages of packers 10 are generally arranged for injection/production of an oil well string, a region between each stage of packer 10 is a water injection layer/a production layer, a water absorption profile of each water injection layer or a production profile of the production layer is analyzed through signals collected by a distributed optical fiber sensor 31, and water injection quantity or production quantity is adjusted in real time through a flow control valve c. When a certain water injection layer is a low permeable layer, adjusting a flow control valve c to strengthen water injection; when a certain water injection layer is a high permeable layer, reducing or stopping water injection; when a certain water injection layer is a middle permeable layer, the water injection quantity balances the pressure difference between injection and extraction; the oil extraction profile obtains the extraction profile of each layer by extracting the temperature, pressure and flow information of each layer, thereby guiding injection, increasing the injection amount of a bottom layer with high extraction rate, and otherwise, reducing the injection amount. The oil well adopting the intelligent monitoring device obviously improves the recovery ratio, reduces the accident shutdown, and obviously prolongs the period of safe and stable operation.
Claims (8)
1. An oil well tubular column based on distributed monitoring which characterized in that: the packer comprises a plurality of pipe sections divided by the packer, wherein the pipe sections are flexible composite pipes, detection optical fibers are arranged on an inner liner layer and/or an outer sleeve layer, and distributed optical fiber sensor assemblies are arranged on the detection optical fibers.
2. An oil well string based on distributed monitoring as claimed in claim 1, wherein: the optical fiber sensor assembly includes a DTS sensor, a DAS sensor, a FBG sensor or an F-P cavity sensor and a modulator.
3. An oil well string based on distributed monitoring as claimed in claim 2, wherein: the distance between the DTS sensors is 0.2-2 meters.
4. A well string based on distributed monitoring according to claim 1 or 2, characterized in that: the detection optical fibers are symmetrically and linearly laid along the axial direction of the pipeline or spirally wound and laid by taking the axial direction of the pipeline as the center.
5. A well string based on distributed monitoring according to claim 1 or 2, characterized in that: and a reinforcing layer is arranged between the inner liner layer and the outer sleeve layer of the pipe section, and the reinforcing layer is made of metal wires or a reinforcing fiber wire woven mesh or is formed by spirally winding the metal wires or the reinforcing fiber wires with the axial direction of the pipeline as the center.
6. The utility model provides an intelligent monitoring device of oil recovery/water injection well pipeline which characterized in that: comprising the well string of claims 1 to 5 and a monitoring mechanism connected to the detection fiber; the oil well pipe column is arranged in an oil well, and the monitoring mechanism comprises a laser transmitter, a detector and a data processor.
7. The intelligent monitoring device of an oil/water injection well pipeline as claimed in claim 6, characterized in that: the oil well pipe column is in butt joint with a gathering and transportation pipeline outside an oil well through a pipeline joint, and the pipe sections of the gathering and transportation pipeline and the oil well pipe column are the same pipe fittings.
8. The intelligent monitoring device of an oil/water injection well pipeline as claimed in claim 6, characterized in that: and each pipe section of the oil well pipe column is provided with a flow control valve, and the flow control valve is electrically connected with the monitoring mechanism.
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| CN202022502840.1U CN213360096U (en) | 2020-11-03 | 2020-11-03 | Oil well tubular column based on distributed monitoring and intelligent monitoring device thereof |
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| CN202022502840.1U CN213360096U (en) | 2020-11-03 | 2020-11-03 | Oil well tubular column based on distributed monitoring and intelligent monitoring device thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406762A (en) * | 2021-07-16 | 2021-09-17 | 中海石油(中国)有限公司 | Method and device for continuously putting down underground optical cable |
| CN113958312A (en) * | 2021-08-02 | 2022-01-21 | 重庆双标石油工程技术服务有限公司 | Distributed optical fiber temperature measurement system for oil and gas well information acquisition |
| CN115655133A (en) * | 2022-11-01 | 2023-01-31 | 中国石油大学(北京) | Optical fiber strain sensing pipe column and ground stress measuring method |
| CN115655133B (en) * | 2022-11-01 | 2024-05-03 | 中国石油大学(北京) | Ground stress measuring method based on optical fiber strain sensing tubular column |
-
2020
- 2020-11-03 CN CN202022502840.1U patent/CN213360096U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406762A (en) * | 2021-07-16 | 2021-09-17 | 中海石油(中国)有限公司 | Method and device for continuously putting down underground optical cable |
| CN113958312A (en) * | 2021-08-02 | 2022-01-21 | 重庆双标石油工程技术服务有限公司 | Distributed optical fiber temperature measurement system for oil and gas well information acquisition |
| CN115655133A (en) * | 2022-11-01 | 2023-01-31 | 中国石油大学(北京) | Optical fiber strain sensing pipe column and ground stress measuring method |
| CN115655133B (en) * | 2022-11-01 | 2024-05-03 | 中国石油大学(北京) | Ground stress measuring method based on optical fiber strain sensing tubular column |
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| GR01 | Patent grant | ||
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Distributed Monitoring Based Oil Well String and Its Intelligent Monitoring Device Effective date of registration: 20230303 Granted publication date: 20210604 Pledgee: Cangzhou Bank Co.,Ltd. Hengshui Jingxian Sub branch Pledgor: HEBEI HAIEN RUBBER PRODUCTS Co.,Ltd. Registration number: Y2023980033918 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |