CN112012722A - Optical fiber sensing measurement system and method for temperature and pressure inside and outside underground oil pipe - Google Patents
Optical fiber sensing measurement system and method for temperature and pressure inside and outside underground oil pipe Download PDFInfo
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- CN112012722A CN112012722A CN202010121488.9A CN202010121488A CN112012722A CN 112012722 A CN112012722 A CN 112012722A CN 202010121488 A CN202010121488 A CN 202010121488A CN 112012722 A CN112012722 A CN 112012722A
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- pipe
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- oil pipe
- optical cable
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention provides an optical fiber sensing measurement system and a measurement method for temperature and pressure inside and outside an underground oil pipe, wherein an in-pipe sensor and an out-pipe sensor are both arranged on a sensor fixing device, and signal output ends of the in-pipe sensor and the out-pipe sensor are connected with a signal input end of a data processor through an underground optical cable; the base and the lid set up in the oil pipe in the pit, and base and lid adopt the detachable lock mode to link to each other, offer the resettlement groove that is used for settling intraductal sensor or outside of tubes sensor on the lid, offer in the clamp plate with resettlement groove assorted firm groove, the clamp plate is blocked joint on the lid. The system can weld the underground optical cable and each sensor in advance, reduces the construction time of occupying an operation platform by on-site welding, reduces the operation cost and greatly improves the efficiency of on-site construction measurement compared with the prior art.
Description
Technical Field
The invention relates to the technical field of underground monitoring, in particular to an optical fiber sensing measurement system for temperature and pressure inside and outside an underground oil pipe and a measurement method thereof.
Background
Oil and gas resource development is a strategic industry affecting national energy stability and economic safety. In recent years, the development of oil and gas is the focus of the development of perfecting reservoir dynamics and implementing optimized oil recovery, wherein the management of reservoir temperature and pressure is the basis for effective reservoir management and enhanced oil recovery. The parameters such as the temperature and the pressure inside and outside the underground oil pipe can be used for reservoir analysis and production state analysis, so that the method is particularly important for measuring the temperature and the pressure inside and outside the underground oil pipe.
Currently, downhole tubing temperature and pressure are typically obtained based on fiber optic sensing technology. The underground oil pipe is provided with a plurality of supporting cylinders, and in the measuring process, a measurer carries the optical cable, the sensor and the corresponding optical cable fusion tool to carry out underground operation. When the optical cable reaches the fixed position of the support cylinder, a measurer welds the optical cable and the sensor and places the welded sensor in the support cylinder. The optical cable is cut off at the position where each layer of oil pipe is separated, and corresponding fusion welding work is carried out. For example, taking a three-level sensor as an example, there are three sets of the same sensors downhole, and the measurements are performed with the cartridges placed at three different locations. At the first support cylinder, the first-level sensor and the optical cable need to be welded for 1 time, and when the optical cable passes through the first oil pipe separation part, the welding needs to be carried out for 1 time. By analogy, 6 times of welding are needed.
In the process of measuring the temperature and the pressure of the underground oil pipe, operation needs to be carried out on an underground site. Taking the three-level sensor as an example, 6 times of fusion welding of the multi-core optical cable is required on site, each time of the fusion welding of the optical cable is about 4 hours, only 6 times of the fusion welding of the optical cable takes about 24 hours, and further the construction time of an operation platform is seriously occupied, so that the measurement efficiency of the temperature and the pressure of the underground oil pipe is low. In addition, because the construction site is located in the field environment, the fusion welding success rate of the optical cable is lower, and the whole measurement process is time-consuming and labor-consuming.
Disclosure of Invention
The invention overcomes the defects in the prior art, the existing measuring device and method for the temperature and the pressure of the underground oil pipe occupy too long construction time of an operation platform, and the measuring efficiency is low, and provides the optical fiber sensing measuring system for the temperature and the pressure inside and outside the underground oil pipe and the measuring method thereof.
The purpose of the invention is realized by the following technical scheme.
The optical fiber sensing measurement system for the temperature and pressure inside and outside the underground oil pipe comprises a sensor, a sensor fixing device and a data processor,
the sensors comprise an in-pipe sensor and an out-pipe sensor, the in-pipe sensor and the out-pipe sensor are both arranged on the sensor fixing device, and signal output ends of the in-pipe sensor and the out-pipe sensor are connected with a signal input end of the data processor through an underground optical cable;
the sensor fixing device comprises a base, a cover body and a pressing plate, wherein the base and the cover body are arranged on the outer wall of the underground oil pipe in a sliding mode, the base and the cover body are connected in a detachable buckling mode, a placing groove used for placing the sensor inside the pipe or the sensor outside the pipe is formed in the cover body, a stabilizing groove matched with the placing groove is formed in the pressing plate, and the pressing plate is clamped on the cover body.
The sensor fixing device further comprises an optical cable fusion cabin, wherein the optical cable fusion cabin is arranged on the outer side of the underground optical cable welding position on the base, and fusion points of the underground optical cable are arranged in the optical cable fusion cabin so as to achieve the purpose of sealing and protecting the fusion points of the underground optical cable.
The optical fiber sensing measurement system further comprises a pressure guide oil pipe nipple, the pressure guide oil pipe nipple is arranged at the position to be measured of the underground oil pipe, a pressure guide hole penetrating through the side wall of the pressure guide oil pipe nipple is formed in the side wall of the pressure guide oil pipe nipple, and the pressure guide pipe penetrates through the pressure guide hole and is connected with the pressure guide oil pipe nipple and the sensor in the pipe.
The optical fiber sensing measurement system further comprises a penetrable packer, the penetrable packer is arranged at the layering position of the downhole oil pipe, and an optical cable channel is formed in the penetrable packer.
The length of base is greater than the length of lid, the corresponding check out test set of joint on the base of being convenient for.
The number of the placing grooves is equal to the number of the stabilizing grooves.
The number of the pressing plates is 2-4.
The optical fiber sensing measurement method for the temperature and pressure inside and outside the underground oil pipe is carried out according to the following steps:
step 1, fusing signal output ends of an in-pipe sensor and an out-pipe sensor with an underground optical cable, and then putting the underground optical cable into an oil gas well;
and 3, acquiring the in-pipe temperature and pressure of the underground oil pipe by the in-pipe sensor through the pressure guiding pipe, acquiring the out-pipe temperature and pressure of the underground oil pipe by the out-pipe sensor, and transmitting the data acquired by the in-pipe sensor and the out-pipe sensor to the data processor through the underground optical cable.
If the in-pipe sensor and the out-of-pipe sensor are located at the coupling of the underground oil pipe, piping is carried out through the oil pipe nipple in advance, namely, the in-pipe sensor and the out-of-pipe sensor are prevented from being located at the coupling of the underground oil pipe by adding the oil pipe nipple according to the actual length of a running pipe column.
The invention has the beneficial effects that: before going to the field survey, survey crew is under the condition of confirming the interstage sensor interval, carry out the butt fusion with cable in the pit and intraductal sensor and outside of tubes sensor, according to measuring the demand butt fusion and accomplish the back, take it to the scene and go down to the oil gas well by survey crew, when descending the pit to the measuring point of awaiting measuring, install sensor and outside of tubes sensor on the outer wall of oil pipe in the pit through sensor fixing device, base and lid match the lock promptly on the outer wall in the pit, inlay each sensor in corresponding resettlement groove again, then match the joint top board, the last stable groove of clamp further fixes each sensor. The in-pipe sensor collects the in-pipe temperature and pressure of the underground oil pipe through the pressure guiding pipe, the out-pipe sensor collects the out-pipe temperature and pressure of the underground oil pipe, and the in-pipe/out-pipe temperature and pressure of the underground oil pipe are transmitted to the ground data processor through the underground optical cable. Sensor fixing device slidable mounting is on the outer wall of oil pipe in the pit, so sensor fixing device's position can be adjusted according to the measuring position of intraductal sensor and outside of tubes sensor, that is to say, because sensor fixing device can be at oil pipe's outer wall longitudinal movement in the pit, so this device can carry out the butt fusion with underground optical cable and each sensor in advance, reduced the construction time who occupies operation platform at the on-the-spot butt fusion, for prior art, the operating cost has been reduced, and the efficiency of site operation measurement has been improved greatly.
Drawings
FIG. 1 is a view of an application scenario of an optical fiber sensing measurement system for temperature and pressure inside and outside a downhole oil pipe according to the present invention;
FIG. 2 is a schematic structural diagram of an optical fiber sensing measurement system for temperature and pressure inside and outside a downhole tubing according to the present invention;
FIG. 3 is a schematic flow chart of a method for measuring the temperature and pressure inside and outside the downhole tubing by fiber optic sensing according to the present invention;
in the figure: 1 is an underground optical cable; 2 is an in-tube sensor; 3 is an external sensor; 4 is a sensor fixing device; 41 is a base; 42 is a cover body; 421 is a setting groove; 43 is a pressing plate; 431 is a stabilizing groove; 44 is a cable fusion cabin; 5 is a data processor; 6 is a downhole oil pipe; 61 is a pressure guide pipe; 7 is a pressure guide oil pipe nipple; 8 is a traversable packer; and 81 is a cable channel.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
The optical fiber sensing measurement system for the temperature and pressure inside and outside the underground oil pipe comprises a sensor, a sensor fixing device 4 and a data processor 5,
the sensors comprise an in-pipe sensor 2 and an out-pipe sensor 3, the in-pipe sensor 2 and the out-pipe sensor 3 are both arranged on a sensor fixing device 4, and the signal output ends of the in-pipe sensor 2 and the out-pipe sensor 3 are connected with the signal input end of a data processor 5 through an underground optical cable 1;
The sensor fixing device 4 further comprises an optical cable fusion cabin 44, the optical cable fusion cabin 44 is installed on the base 41 outside the welding position of the underground optical cable 1, and fusion points of the underground optical cable 1 are all arranged in the optical cable fusion cabin 44 so as to achieve the purpose of sealing and protecting the fusion points of the underground optical cable 1.
Example two
On the basis of embodiment one, optic fibre sensing measurement system still includes to lead and presses oil pipe nipple joint 7, leads and presses oil pipe nipple joint 7 setting and wait to measure the position at oil pipe 6 in the pit, sets up the pressure guide hole that runs through the lateral wall of pressure guide oil pipe nipple joint 7 on the lateral wall of pressure guide oil pipe nipple joint 7, and pressure guide pipe 61 runs through the pressure guide hole and links to each other pressure guide oil pipe nipple joint 7 and intraductal sensor 2.
The optical fiber sensing measurement system further comprises a traversable packer 8, the traversable packer 8 is arranged at the layering position of the underground oil pipe 6, and an optical cable channel 81 is formed in the traversable packer 8.
EXAMPLE III
On the basis of the second embodiment, the length of the base 41 is greater than that of the cover 42, so that the corresponding detection equipment can be conveniently clamped on the base 41.
The number of seating grooves 421 is equal to the number of stabilizing grooves 431.
The number of the pressing plates 43 is 2 to 4.
Example four
On the basis of the third embodiment, the optical fiber sensing measurement method for the temperature and pressure inside and outside the downhole oil pipe is carried out according to the following steps:
step 1, fusing signal output ends of an in-pipe sensor 2 and an out-of-pipe sensor 3 with an underground optical cable 1, and then putting the underground optical cable into an oil gas well;
If the in-pipe sensor 2 and the out-of-pipe sensor 3 are located at the coupling of the underground oil pipe 6, tubing is arranged through the oil pipe nipple in advance, namely, according to the actual length of a running pipe column, the situation that the in-pipe sensor and the out-of-pipe sensor are located at the coupling of the underground oil pipe is avoided by adding the oil pipe nipple, and the purpose that the measuring point is staggered with the position of the sensor to be installed and the coupling of the oil pipe is achieved.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (9)
1. The optical fiber sensing measurement system for the temperature and pressure inside and outside the underground oil pipe is characterized in that: comprises a sensor, a sensor fixing device and a data processor,
the sensors comprise an in-pipe sensor and an out-pipe sensor, the in-pipe sensor and the out-pipe sensor are both arranged on the sensor fixing device, and signal output ends of the in-pipe sensor and the out-pipe sensor are connected with a signal input end of the data processor through an underground optical cable;
the sensor fixing device comprises a base, a cover body and a pressing plate, wherein the base and the cover body are arranged on the outer wall of the underground oil pipe in a sliding mode, the base and the cover body are connected in a detachable buckling mode, a placing groove used for placing the sensor inside the pipe or the sensor outside the pipe is formed in the cover body, a stabilizing groove matched with the placing groove is formed in the pressing plate, and the pressing plate is clamped on the cover body.
2. The fiber optic sensing measurement system of temperature and pressure inside and outside a downhole tubing of claim 1, wherein: the sensor fixing device further comprises an optical cable fusion cabin, wherein the optical cable fusion cabin is arranged on the outer side of the underground optical cable welding position on the base, and fusion points of the underground optical cable are arranged in the optical cable fusion cabin so as to achieve the purpose of sealing and protecting the fusion points of the underground optical cable.
3. The fiber optic sensing measurement system of temperature and pressure inside and outside a downhole tubing of claim 1, wherein: the optical fiber sensing measurement system further comprises a pressure guide oil pipe nipple, the pressure guide oil pipe nipple is arranged at the position to be measured of the underground oil pipe, a pressure guide hole penetrating through the side wall of the pressure guide oil pipe nipple is formed in the side wall of the pressure guide oil pipe nipple, and the pressure guide pipe penetrates through the pressure guide hole and is connected with the pressure guide oil pipe nipple and the sensor in the pipe.
4. The fiber optic sensing measurement system of temperature and pressure inside and outside a downhole tubing of claim 1, wherein: the optical fiber sensing measurement system further comprises a penetrable packer, the penetrable packer is arranged at the layering position of the downhole oil pipe, and an optical cable channel is formed in the penetrable packer.
5. The fiber optic sensing measurement system of temperature and pressure inside and outside a downhole tubing of claim 1, wherein: the length of base is greater than the length of lid, the corresponding check out test set of joint on the base of being convenient for.
6. The fiber optic sensing measurement system of temperature and pressure inside and outside a downhole tubing of claim 1, wherein: the number of the placing grooves is equal to the number of the stabilizing grooves.
7. The fiber optic sensing measurement system of temperature and pressure inside and outside a downhole tubing of claim 1, wherein: the number of the pressing plates is 2-4.
8. The method for optical fiber sensing measurement of the temperature and pressure inside and outside the downhole tubing based on the optical fiber sensing measurement system of the temperature and pressure inside and outside the downhole tubing of any one of claims 1 to 7, wherein: the method comprises the following steps:
step 1, fusing signal output ends of an in-pipe sensor and an out-pipe sensor with an underground optical cable, and then putting the underground optical cable into an oil gas well;
step 2, a worker goes into the well, then an in-pipe sensor and an out-pipe sensor which are welded with an underground optical cable are installed on the outer wall of the underground oil pipe through a sensor fixing device, and a fusion point of the underground optical cable is arranged in an optical cable fusion cabin, wherein the sensor fixing device can move longitudinally along the underground oil pipe so as to achieve the purpose of adjusting according to the measuring positions of the in-pipe sensor and the out-pipe sensor;
and 3, acquiring the in-pipe temperature and pressure of the underground oil pipe by the in-pipe sensor through the pressure guiding pipe, acquiring the out-pipe temperature and pressure of the underground oil pipe by the out-pipe sensor, and transmitting the data acquired by the in-pipe sensor and the out-pipe sensor to the data processor through the underground optical cable.
9. The optical fiber sensing measurement method for temperature and pressure inside and outside a downhole tubing according to claim 8, characterized in that: if the in-pipe sensor and the out-of-pipe sensor are located at the coupling of the underground oil pipe, piping is carried out through the oil pipe nipple in advance, namely, the in-pipe sensor and the out-of-pipe sensor are prevented from being located at the coupling of the underground oil pipe by adding the oil pipe nipple according to the actual length of a running pipe column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010121488.9A CN112012722B (en) | 2020-02-26 | 2020-02-26 | Optical fiber sensing measurement system and method for temperature and pressure inside and outside underground oil pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010121488.9A CN112012722B (en) | 2020-02-26 | 2020-02-26 | Optical fiber sensing measurement system and method for temperature and pressure inside and outside underground oil pipe |
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| CN112012722A true CN112012722A (en) | 2020-12-01 |
| CN112012722B CN112012722B (en) | 2022-10-18 |
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| CN105114052A (en) * | 2015-04-27 | 2015-12-02 | 中国海洋石油总公司 | Multiphase flow flowmeter in well and monitor method |
| CN109267991A (en) * | 2018-10-10 | 2019-01-25 | 北京大德广源石油技术服务有限公司 | Oil/gas well output and injection monitoring system |
| CN209689799U (en) * | 2019-05-22 | 2019-11-26 | 克拉玛依四维石油科技有限公司 | Downhole optic fiber pressure monitoring device based on pressure sensor |
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2020
- 2020-02-26 CN CN202010121488.9A patent/CN112012722B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060250274A1 (en) * | 2005-04-18 | 2006-11-09 | Core Laboratories Canada Ltd | Systems and methods for acquiring data in thermal recovery oil wells |
| US20110048136A1 (en) * | 2007-10-31 | 2011-03-03 | William Birch | Pressure sensor assembly and method of using the assembly |
| CN102758605A (en) * | 2011-04-26 | 2012-10-31 | 中国石油化工股份有限公司 | Optical fiber test system fixed in oil well |
| CN202338294U (en) * | 2011-12-07 | 2012-07-18 | 中国石油天然气股份有限公司 | Self-blowing and machine-picking integrated intelligent well completion pipe string |
| CN202690032U (en) * | 2011-12-29 | 2013-01-23 | 昆山蓝岭科技有限公司 | Double-point sensor carrier |
| CN105114052A (en) * | 2015-04-27 | 2015-12-02 | 中国海洋石油总公司 | Multiphase flow flowmeter in well and monitor method |
| CN109267991A (en) * | 2018-10-10 | 2019-01-25 | 北京大德广源石油技术服务有限公司 | Oil/gas well output and injection monitoring system |
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| CN112012722B (en) | 2022-10-18 |
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