CN101251008A - Optical fiber sensing method for synchronously testing temperature and pressure below horizontal well - Google Patents
Optical fiber sensing method for synchronously testing temperature and pressure below horizontal well Download PDFInfo
- Publication number
- CN101251008A CN101251008A CNA2008100108114A CN200810010811A CN101251008A CN 101251008 A CN101251008 A CN 101251008A CN A2008100108114 A CNA2008100108114 A CN A2008100108114A CN 200810010811 A CN200810010811 A CN 200810010811A CN 101251008 A CN101251008 A CN 101251008A
- Authority
- CN
- China
- Prior art keywords
- test
- pressure
- temperature
- optical fiber
- horizontal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to a horizontal underground temperature and pressure synchronous test optical fiber sensing method which belongs to the thick oil heat extraction and horizontal section profile temperature and pressure synchronous test field. The invention performs temperature and pressure test by using optical cable special equipment to run a test optical fiber into a perforation section of a horizontal well oil layer provided with a sealer. The method is not limited by direction and angle during the test process; temperature and pressure balance is not affected, test precision and transmission effect are not affected by a wellbore, and simultaneous identification of horizontal section temperature and pressure can be realized; moreover, the optical fiber and optical fiber equipment used have the advantages of large transmission capacity, quick speed, strong electromagnetic resistance and geomagnetic resistance, and capability of directly reading and storing test parameters on the ground.
Description
Technical field:
The present invention relates to a kind of horizontal downhole temperature and pressure synchronism detection optical fiber sensing method; When belonging to the viscous crude heating exploitation, net horizontal section section temperature and pressure field of synchronization.
Background technology:
At present, the downhole testing of technical field of petroleum extraction mainly adopts mechanical sensing recorded downhole mode both at home and abroad, rely on gravity to go into the well and vertical moving recording test way, because only being suitable for the oil well vertical angle when test, said apparatus spends with interior oil well less than 10, though the electronic sensor surface recorder can be at the well build-in test of wide-angle in addition, but this quasi-instrument operating temperature only is suitable for 260 ℃ with interior oil well, development along with the oil field, the appearance of some big gradients and horizontal well is adopted said method to test and can not be satisfied actual needs owing to limited by well depth.
Summary of the invention:
The objective of the invention is to overcome above-mentioned shortcoming, and a kind of horizontal downhole temperature that provides and pressure synchronism detection optical fiber sensing method, this method use test optical cable when the horizontal well build-in test not the recipient to and angle limits, can be 450 ℃ of well temperatures, carry out temperature and pressure test under any angle case of pressure 20MPa simultaneously, and laser propagation effect is not subjected to ectocine, the certainty of measurement height.
Technical solution of the present invention:
The task of Ti Chuing for achieving the above object, the present invention has adopted by the optical cable special equipment HTHP measuring fiber has been lowered in the oil reservoir perforated interval that has in the HTHP shaft mouth test sealer horizontal well for this reason, carries out a kind of method of temperature, pressure test then.
Described HTHP measuring fiber is made up of the fibre core in the outer shell, described outer shell 1cr18ni9ti, the hollow pipe that stainless steel material is made, fibre core in the pipe is one and has certain-length, the fine rule that adopts germanium, boron, silica material to be made, on cross section such as fine rule such as the section of grade, be furnished with ultraviolet grating parallel to each other, the screen layer that polyene argon ammonia material is made is housed between doughnut between outer shell and the fibre core;
400 ℃ of described measuring fiber heatproofs, withstand voltage 20MPa measures temperature: 60-350 ℃ scope, pressure measurement range: 0.5MPa-20MPa.
Operating principle of the present invention:
The HTHP measuring fiber is lowered into the oil reservoir perforated interval position that has shaft mouth test sealer horizontal well with the optical cable special equipment during work, because measuring fiber adopts optical fiber structure and material property to determine optical fiber optical time domain reflection (OTDR), and optical fiber is back to the Raman scattering temperature effect, like this when the light pulse of high speed light source when an end-fire of optical fiber is gone into optical fiber, this light pulse meeting is propagated forward along optical fiber, because of the similar minute surface of optical fiber inwall, so the every bit in the light pulse propagation all can produce reflection, there is its direction of reverberation of sub-fraction just in time opposite among the reflection with the incident light direction, in this retroreflection light intensity and the light the exit point temperature, pressure have certain relation, the high more then intensity of reflected light of the temperature of pip and pressure is big more, that is to say the temperature and the pressure size that can reflect pip to catoptrical intensity (information light source), according to this phenomenon, the optical fiber of light-sensitive material will be tied with, be carved into grating and inject fibre core with the test frequency and the pressure measurement wavelength of little laser design, make every group of grating that fixing frequency and wavelength all be arranged, thermometric grating frequency linear thereupon variation when variations in temperature along with variation of temperature is directly proportional, the pressure measurement grating wavelength is varied to the linear thereupon variation of inverse ratio along with pressure when pressure changes, utilize this principle, if can measure temperature and the force value that catoptrical intensity just can calculate pip, therefore when measuring, send broad band laser by ground light electric signal processor (ground (FBG) demodulator), detect every group of grating frequency and wavelength change simultaneously, and information is imported in the demodulating system through spectrum analysis, filtering, coupling, digital-to-analogue conversion, opto-electronic conversion can accurately show and store respectively organizes the downhole temperature that grating is monitored, the pressure history parameter value.
The present invention compared with prior art has distinguishing feature:
Because the measuring fiber fibre core that adopts in the inventive method is selected germanium for use, materials such as boron, and utilize wound form ultraviolet grating and polyene argon ammonia screen layer to be made, like this when carrying out horizontal checkout, be not subjected to direction and angle limits in the well, its precision and laser propagation effect can be unaffected, therefore can realize also when being used for horizontal downhole temperature and pressure synchronism detection that full well section is monitored the net horizontal section temperature simultaneously and pressure changes, need not move around in measured zone in the test process, thereby can guarantee that well temperature and pressure balance are unaffected, successful realization underground monitoring.In addition since this optical fiber also to have transmission capacity big, speed is fast, the anti-electromagnetic interference capability characteristics also can realize the underground monitoring ground directly-reading, stored record automatically.
Description of drawings:
Fig. 1 is a measuring fiber structural representation of the present invention.
Fig. 2 is a test job schematic diagram of the present invention.
Fig. 3 is test optical fiber transfer process figure.
Among the figure by 1, the ground (FBG) demodulator, 2, outer shell, 3, polyene argon ammonia screen layer, 4, fibre core, 5, photoelectric signal processor, 6, grating, 7, the high-speed light source inlet, 8, information light source, 9, optical cable special equipment, 10, HTHP shaft mouth test sealer, 11, measuring fiber, 12, oil reservoirs of horizontal well perforated interval, 13, the display machine forms.
The specific embodiment:
The present invention is provided by following examples, is illustrated below in conjunction with accompanying drawing:
In Fig. 2, this method of testing is with optical cable special equipment 9 HTHP measuring fiber 11 to be lowered in the horizontal well that has HTHP shaft mouth test sealer 10 to carry out temperature, pressure test in the oil reservoir perforated interval 12.
In Fig. 1, measuring fiber 11 is made up of the fibre core 4 in the outer shell 2, described outer shell is to use 1cr18ni9ti, the hollow pipe that stainless steel material is made, fibre core 4 in the pipe is one and has certain-length, the fine rule that adopts germanium, boron, silica material to be made is furnished with ultraviolet grating 6 parallel to each other on cross section such as fine rule such as the section of grade, the polyene argon ammonia screen layer 3 that polyene argon ammonia material is made is housed between doughnut between outer shell 2 and the fibre core 4.
In Fig. 3, when the present invention works, measuring fiber 11 and photoelectric signal processor 5 and ground (FBG) demodulator 1, display machine 13 are connected, during measurement, when the light pulse of high speed light source is measured among high-speed light source inlet 7 enters fibre core 4, well temperature that reverberation reflected and pressure signal (being the information light source) are imported among the photoelectric signal processor 5, enter into ground (FBG) demodulator 1 and display 13 through handling then, read temperature and pressure measuring value.
Claims (3)
1. horizontal downhole temperature and pressure synchronism detection optical fiber sensing method, it is characterized in that: this method of testing is with optical cable special equipment (9) HTHP measuring fiber (11) to be lowered into to have in the interior oil reservoir perforated interval (12) of HTHP shaft mouth test sealer (10) horizontal well, carries out temperature, pressure test.
2. device of implementing claim 1 method is characterized in that: described HTHP measuring fiber (11) is made up of the fibre core (4) in the outer shell (2); Described outer shell is to use 1cr18ni9ti, the hollow pipe that stainless steel material is made, fibre core (4) in the pipe is one and has certain-length, the fine rule that adopts germanium, boron, silica material to be made, on cross section such as fine rule such as the section of grade, be furnished with ultraviolet grating (6) parallel to each other, the polyene argon ammonia screen layer (3) that polyene argon ammonia material is made is housed between doughnut between outer shell (2) and the fibre core (4).
3. testing arrangement according to claim 2 is characterized in that: 400 ℃ of described measuring fiber (11) heatproofs, withstand voltage 20MPa measures temperature range: 60-350 ℃, pressure measurement range: 0.5MPa-20MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100108114A CN101251008A (en) | 2008-03-31 | 2008-03-31 | Optical fiber sensing method for synchronously testing temperature and pressure below horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100108114A CN101251008A (en) | 2008-03-31 | 2008-03-31 | Optical fiber sensing method for synchronously testing temperature and pressure below horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101251008A true CN101251008A (en) | 2008-08-27 |
Family
ID=39954583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100108114A Pending CN101251008A (en) | 2008-03-31 | 2008-03-31 | Optical fiber sensing method for synchronously testing temperature and pressure below horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101251008A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587760B (en) * | 2009-05-07 | 2011-01-19 | 中国石油辽河油田钻采工艺研究院 | Cable of downhole monitoring system of horizontal steam injection well and preparing method thereof |
| CN102562038A (en) * | 2012-02-10 | 2012-07-11 | 中国海洋石油总公司 | Direct reading testing system for pressure and temperature of underground stratum |
| CN106884647A (en) * | 2015-12-10 | 2017-06-23 | 中国石油天然气股份有限公司 | Oil well detection device and oil well detection method |
| CN110965995A (en) * | 2019-10-31 | 2020-04-07 | 中国石油天然气股份有限公司 | Oil-water distribution testing device and method for low-liquid-volume horizontal well |
-
2008
- 2008-03-31 CN CNA2008100108114A patent/CN101251008A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587760B (en) * | 2009-05-07 | 2011-01-19 | 中国石油辽河油田钻采工艺研究院 | Cable of downhole monitoring system of horizontal steam injection well and preparing method thereof |
| CN102562038A (en) * | 2012-02-10 | 2012-07-11 | 中国海洋石油总公司 | Direct reading testing system for pressure and temperature of underground stratum |
| CN106884647A (en) * | 2015-12-10 | 2017-06-23 | 中国石油天然气股份有限公司 | Oil well detection device and oil well detection method |
| CN110965995A (en) * | 2019-10-31 | 2020-04-07 | 中国石油天然气股份有限公司 | Oil-water distribution testing device and method for low-liquid-volume horizontal well |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110541702B (en) | Underground fluid distribution monitoring system and method based on distributed optical fiber sensing | |
| Liu et al. | Design and implementation of distributed ultra-high temperature sensing system with a single crystal fiber | |
| CN106121635B (en) | Distributed temperature test macro and method for hot dry rock deep-well | |
| EP2977738B1 (en) | Systems and methods for distributed pressure sensing | |
| CN103940501B (en) | A kind of BOTDA distributed vibration sensing system based on dynamic phasing demodulation | |
| CN113513302B (en) | Underground fluid monitoring system and method based on distributed optical fiber hydrophone | |
| CN210598961U (en) | Underground fluid distribution monitoring system based on distributed optical fiber sensing | |
| CN104121946A (en) | Intelligent casing pipe monitor system based on optical fiber sensing technology | |
| CN112031743B (en) | Underground fluid identification device and measurement method based on distributed optical fiber sensing technology | |
| CN105181108A (en) | Optical fiber grating earth sound sensing probe and sensing system | |
| Cheng et al. | An experimental study on monitoring the phreatic line of an embankment dam based on temperature detection by OFDR | |
| Sun et al. | Fiber optic distributed sensing technology for real-time monitoring water jet tests: Implications for wellbore integrity diagnostics | |
| CN103017886A (en) | Polarization-maintaining fiber grating two-dimensional vector vibration sensor | |
| US6502456B1 (en) | Method and apparatus for measuring multiple parameters of steam | |
| CN101251008A (en) | Optical fiber sensing method for synchronously testing temperature and pressure below horizontal well | |
| CN102645245A (en) | Distributed fluid pressure and temperature simultaneous measurement device and method based on optical fiber brillouin scattering | |
| CN101818640A (en) | Fully distributed device and method for monitoring underground working temperature of oil-water well based on Raman scattered light time-domain reflectometer | |
| US20200284935A1 (en) | Simultaneous Seismic Refraction And Tomography | |
| CN108871606B (en) | Geothermal deep well wall distributed optical fiber temperature monitoring system and method thereof | |
| CN204881836U (en) | Fiber grating earthquake sounds sensing probe | |
| CN111964740B (en) | Thermal fiber bragg grating flow sensor for production logging and manufacturing method | |
| CN101520509A (en) | Method for comparatively measuring range of interframe of chaotic light time domain waveform | |
| CN106441653B (en) | A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method | |
| Zheng et al. | Investigation of a quasi-distributed displacement sensor using the macro-bending loss of an optical fiber | |
| CN109631964A (en) | A kind of single mode optical fiber sensing probe of the two-parameter multiple groups measuring section of no gelatinization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080827 |