CN202381084U - Identical optical fiber temperature and pressure combined monitoring system - Google Patents
Identical optical fiber temperature and pressure combined monitoring system Download PDFInfo
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- CN202381084U CN202381084U CN2011205033304U CN201120503330U CN202381084U CN 202381084 U CN202381084 U CN 202381084U CN 2011205033304 U CN2011205033304 U CN 2011205033304U CN 201120503330 U CN201120503330 U CN 201120503330U CN 202381084 U CN202381084 U CN 202381084U
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Abstract
The utility model discloses an identical optical fiber temperature and pressure combined monitoring system, which is applied to temperature and pressure testing of an oilfield steam assisted gravity drainage oil well. An optical transmitter and receiver and an optical fiber grating static demodulator are arranged on the oilfield ground; the upper end of an optical fiber is connected with the optical fiber grating static demodulator through an optical switch and the optical transmitter and receiver, and the lower end of the optical fiber is connected with an optical fiber grating; the lower end of the optical fiber grating is connected with a lead-in fiber; the lower end of the lead-in fiber is connected with a Fabry-Perot sensor; and the lower end of the Fabry-Perot sensor is connected with a tail fiber. The identical optical fiber temperature and pressure combined monitoring system has the effects that: a high-temperature single-mode optical fiber is selected to be fused with a single-mode Fabry-Perot sensor; the ground is switched through a 1*2 optical switch to perform temperature demodulation and pressure demodulation respectively; and full well section temperature testing and single point pressure testing requirements are met. The full well section temperature testing and the single point pressure testing can be finished without two optical fibers; and meanwhile, the defect of less temperature testing points existing in the identical optical fiber multi-point optical fiber grating temperature testing and single point pressure testing is overcome.
Description
Technical field
The utility model relates to oil recovery technique field, oil field; Be particularly related to SAGD (being called for short SAGD) oil well down-hole temperature and pressure test special equipment; Be that a kind of high temperature single-mode fiber is connected with single mode Fabry-Perot (F-P) sensor, realize oil well full well section distributed optical fiber temperature measurement and single-point pressure measurement.
Background technology
SAGD (being called for short SAGD) is a kind of with a bite straight well or the water horizontal well injection oil reservoir of steam from being positioned near horizontal production well top, oil reservoir bottom, and heated crude oil and steam condensate are from the oil production method of the horizontal well output of oil reservoir bottom.Promptly inject high temperature, high-quality steam continuously, at first grow vapor chamber, at the heating oil reservoir and keep certain formation pressure, replenish stratum energy, crude oil is driven on every side in the producing well extraction then to annotating the vapour well.SAGD has high oil recovery ability, high gas oil ratio, higher ultimate recovery and reduces between well and disturb, and avoids scurrying between too early well logical advantage.
The SAGD exploitation needs monitoring downhole temperature and pressure.Now ripe monitoring technology is to use thermocouple temperature measurement, capillary pressure measuring, but thermocouple, capillary tube thermometric, pressure measurement exist count few, shortcoming such as the pressure measurement management difficulty is big.
Now domestic and international application optical fiber carries out the temperature, pressure monitoring method: adopts two optical fiber, an optical fiber is used for full well section distributed temperature measuring, and another root optical fiber is used for the EFPI pressure measurement, but optical fiber can only pressure measurement, the cost height.Use same optical fiber and carry out thermometric, pressure measurement simultaneously, but the thermometric mode selects for use fiber grating (FBG) to carry out multiple spot (20 points) thermometric, single-point EFPI pressure measurement.Below either way can not reach the requirement of full well section thermometric and single-point pressure measurement.In order to reach the requirement to SAGD (SAGD) well full well section thermometric and single-point pressure measurement, decision adopts single-mode fiber to carry out on welding ground mutually with single mode EFPI, and timesharing is switched to reach full well section thermometric and single-point pressure measurement task.
The utility model content
The purpose of the utility model is: provide a kind of with optical fiber temperature, pressure combination monitoring system; Utilize high temperature single-mode fiber and single mode Fabry-Perot (F-P); Carry out temperature demodulation and pressure demodulation respectively, realize SAGD full well section thermometric and single-point pressure measurement.
The technical scheme that the utility model adopts is: with optical fiber temperature, pressure combination monitoring system, comprise fiber optic, the static demodulator of fiber grating, photoswitch, optical fiber, fiber grating and Fabry-Perot sensor (F-P); It is characterized in that: the static demodulator of fiber optic and fiber grating is arranged on oil well ground, and the upper end of optical fiber is connected with the static demodulator of fiber optic and fiber grating through photoswitch; The lower end of optical fiber connects fiber grating, and it is fine that the lower end of fiber grating connects importing, imports fine lower end connection method Fabry-Perot-type sensor, and Fabry-Perot sensor lower end connects tail optical fiber.
The beneficial effect of the utility model: the utility model is with optical fiber temperature, pressure combination monitoring system; Select high temperature single-mode fiber and single mode Fabry-Perot sensor (F-P) welding mutually for use; Switch through 1 * 2 photoswitch on ground; Carry out temperature demodulation and pressure demodulation respectively, accomplish full well section thermometric and single-point pressure measurement requirement.Do not need two optical fiber can accomplish full well section thermometric and single-point pressure measurement, overcome simultaneously, have thermometric few deficiency of counting with optical fiber multiple spot optical fiber grating temperature-measuring and single-point pressure measurement.
Description of drawings
Fig. 1 is that the utility model is with optical fiber temperature, pressure combination monitoring system structural profile sketch map.
Among the figure, the 1-fiber optic, the static demodulator of 2-fiber grating, 3-photoswitch, 4-optical fiber, 5-fiber grating, 6-import fine, 7-Fabry-Perot sensor, 8-tail optical fiber.
The specific embodiment
Embodiment 1: the same optical fiber temperature, pressure combination monitoring system with a bite oil well is an example, and the utility model is done further explain.
Consult Fig. 1.The utility model is with optical fiber temperature, pressure combination monitoring system, comprises a fiber optic 1, static demodulator 2 of fiber grating, photoswitch 3, optical fiber 4, fiber grating 5 and a Fabry-Perot sensor 7 (F-P).A fiber optic 1 and the static demodulator 2 of fiber grating are arranged on oil well ground; The upper end of optical fiber 4 is that 1 * 2 photoswitch 3 is connected with fiber optic 1 and the static demodulator 2 of fiber grating through a model, and photoswitch 3 carries out timesharing and switches completion and show with optical fiber temperature and pressure timesharing demodulation.The lower end of optical fiber 4 connects fiber grating 5, and the lower end of fiber grating 5 connects importing fibre 6, imports fine 6 lower end connection method Fabry-Perot-type sensor 7; Way is: fiber grating 5 and Fabry-Perot sensor 7 are encapsulated in the quartz glass tube; There is 20cm to import fibre 6 more than 7 at the Fabry-Perot sensor, pulls out the overlay that imports fibre 6, will import fibre 6 and be welded together with fiber grating 5; After weld carried out stress and attenuation measurement, weld is carried out the heat-shrink tube protection handle.Fabry-Perot sensor 7 lower ends connect tail optical fiber 8.
Claims (1)
1. one kind with optical fiber temperature, pressure combination monitoring system, comprises fiber optic (1), the static demodulator (2) of fiber grating, photoswitch (3), optical fiber (4), fiber grating (5) and Fabry-Perot sensor (7); It is characterized in that: the static demodulator (2) of fiber optic (1) and fiber grating is arranged on oil well ground, and the upper end of optical fiber (4) is connected with the static demodulator of fiber grating (2) with fiber optic (1) through photoswitch (3); The lower end of optical fiber (4) connects fiber grating (5), and the lower end of fiber grating (5) connects importing fine (6), imports the lower end connection method Fabry-Perot-type sensor (7) of fine (6), and Fabry-Perot sensor (7) lower end connects tail optical fiber (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205033304U CN202381084U (en) | 2011-12-06 | 2011-12-06 | Identical optical fiber temperature and pressure combined monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205033304U CN202381084U (en) | 2011-12-06 | 2011-12-06 | Identical optical fiber temperature and pressure combined monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN202381084U true CN202381084U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205033304U Expired - Lifetime CN202381084U (en) | 2011-12-06 | 2011-12-06 | Identical optical fiber temperature and pressure combined monitoring system |
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| CN (1) | CN202381084U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940529A (en) * | 2014-02-13 | 2014-07-23 | 盘锦辽河油田鸿海钻采技术发展有限公司 | Optical-fiber security monitoring device for oil-field oil transportation station |
| CN104234701A (en) * | 2014-09-26 | 2014-12-24 | 哈尔滨工业大学 | Underground optical fiber pressure gage and underground pressure measurement method |
| CN104895559A (en) * | 2015-05-25 | 2015-09-09 | 中国石油集团渤海钻探工程有限公司 | Oil-gas well downhole optical fiber temperature and pressure test instrument |
| CN106471210A (en) * | 2014-05-08 | 2017-03-01 | 光学感应器控股有限公司 | Fluid flows into |
| CN109441434A (en) * | 2018-12-19 | 2019-03-08 | 常州艾控智能仪表有限公司 | Multi-parameter measuring systems under photoelectricity combined shaft |
| CN109708775A (en) * | 2019-01-22 | 2019-05-03 | 北京信息科技大学 | The temperature of photonic crystal fiber FP-FBG structure, index sensor and preparation method thereof |
| CN110196071A (en) * | 2019-06-22 | 2019-09-03 | 南昌航空大学 | Based on Fabry Perot chamber side throwing fibre optical sensor and preparation method thereof |
| CN113804247A (en) * | 2021-08-03 | 2021-12-17 | 西安理工大学 | Fabry-Perot cavity and fiber bragg grating-based transformer oil temperature and oil pressure multi-parameter monitoring system |
-
2011
- 2011-12-06 CN CN2011205033304U patent/CN202381084U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940529A (en) * | 2014-02-13 | 2014-07-23 | 盘锦辽河油田鸿海钻采技术发展有限公司 | Optical-fiber security monitoring device for oil-field oil transportation station |
| CN106471210A (en) * | 2014-05-08 | 2017-03-01 | 光学感应器控股有限公司 | Fluid flows into |
| US10578472B2 (en) | 2014-05-08 | 2020-03-03 | Optasense Holdings Limited | Fluid inflow |
| CN106471210B (en) * | 2014-05-08 | 2019-12-17 | 光学感应器控股有限公司 | Inflow of fluid |
| CN104234701B (en) * | 2014-09-26 | 2017-01-25 | 哈尔滨工业大学 | Underground optical fiber pressure gage and underground pressure measurement method |
| CN104234701A (en) * | 2014-09-26 | 2014-12-24 | 哈尔滨工业大学 | Underground optical fiber pressure gage and underground pressure measurement method |
| CN104895559B (en) * | 2015-05-25 | 2017-09-15 | 中国石油集团渤海钻探工程有限公司 | Oil/gas Well downhole optic fiber temperature, pressure tester |
| CN104895559A (en) * | 2015-05-25 | 2015-09-09 | 中国石油集团渤海钻探工程有限公司 | Oil-gas well downhole optical fiber temperature and pressure test instrument |
| CN109441434A (en) * | 2018-12-19 | 2019-03-08 | 常州艾控智能仪表有限公司 | Multi-parameter measuring systems under photoelectricity combined shaft |
| CN109708775A (en) * | 2019-01-22 | 2019-05-03 | 北京信息科技大学 | The temperature of photonic crystal fiber FP-FBG structure, index sensor and preparation method thereof |
| CN110196071A (en) * | 2019-06-22 | 2019-09-03 | 南昌航空大学 | Based on Fabry Perot chamber side throwing fibre optical sensor and preparation method thereof |
| CN113804247A (en) * | 2021-08-03 | 2021-12-17 | 西安理工大学 | Fabry-Perot cavity and fiber bragg grating-based transformer oil temperature and oil pressure multi-parameter monitoring system |
| CN113804247B (en) * | 2021-08-03 | 2024-05-14 | 西安理工大学 | Transformer oil temperature oil pressure multi-parameter monitoring system based on Fabry-Perot cavity and fiber bragg grating |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |