CN203685168U - Synchronous on-line measurement device for temperature, pressure and steam quality of steam injection type oil well - Google Patents
Synchronous on-line measurement device for temperature, pressure and steam quality of steam injection type oil well Download PDFInfo
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- CN203685168U CN203685168U CN201320736825.0U CN201320736825U CN203685168U CN 203685168 U CN203685168 U CN 203685168U CN 201320736825 U CN201320736825 U CN 201320736825U CN 203685168 U CN203685168 U CN 203685168U
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Abstract
The utility model relates to a synchronous on-line measurement device for the temperature, the pressure and the steam quality of a steam injection type oil well. The synchronous on-line measurement device for the temperature, the pressure and the steam quality of the steam injection type oil well comprises a temperature interrogator, a pressure interrogator, a reflectivity interrogator, an industrial personal computer, a temperature sensor, a pressure sensor, a reflectivity sensor and an underground probe, wherein the temperature interrogator, the pressure interrogator, the reflectivity interrogator and the industrial personal computer are positioned on the ground; the temperature sensor, the pressure sensor, the reflectivity sensor and the underground probe are positioned in the pit; the underground probe comprises a shell and a sealed barrel arranged in the shell, wherein an annulus is formed between the shell and the sealed barrel; the wall of the shell is provided with diversion holes; the annulus is communicated with outside via the diversion holes; the shell and the upper end of the sealed barrel are both fixedly arranged on a well mouth; the temperature sensor and the reflectivity sensor are both arranged in the sealed barrel; the pressure sensor is positioned in the annulus and is fixedly arranged on the well mouth. According to the synchronous on-line measurement device for the temperature, the pressure and the steam quality of the steam injection type oil well, which is disclosed by the utility model, the technical problem of low efficiency due to the fact that the traditional underground temperature, pressure and saturated steam quality detection method is not suitable for the underground high temperature and high pressure environment is solved. The synchronous on-line measurement device for the temperature, the pressure and the steam quality of the steam injection type oil well is used for realizing the on-line measurement of the temperature, the pressure and the steam quality of the steam injection type oil well, and the steam injection situation of the oil well is mastered.
Description
Technical field
The utility model relates to steam injection formula oil temperature, pressure, mass dryness fraction On-line Instrument, what be specifically related to is a kind of gas injection well temperature, pressure, mass dryness fraction on-line measurement special purpose device.
Background technology
Because viscosity of thickened oil is large, temperature is very large on the impact of viscous crude, and temperature rising viscosity declines.Thick oil filling steam heating power production practice technology is at present domestic and international main thickened oil recovery means, is to inject wet saturated steam heating oil reservoir reduction viscosity of thickened oil to reach exploitation object to down-hole with direct current cooker.Steam quality is to weigh the index of steam heat content, and steam quality is higher, and quantity of steam institute of unit heat content is just more, and guarantee oil reservoir has enough heat energy to reduce viscosity of crude.Therefore the dynamic monitoring of thick oil filling steam heating power production practice underground heat disaster is most important, it has been antipyretic note effect, and understanding oil reservoir, grasps the key technology that oil reservoir heat contains, steam quality, down-hole pressure, downhole temperature are to reduce downhole crude viscosity, improve the important indicator of heavy oil production.In gas injection process, need the data of Real-Time Monitoring downhole temperature, pressure and saturated vapor dryness.
Traditional detection method is difficult to be applicable to down-hole high temperature and high pressure environment, and efficiency is low, and accuracy of detection is low, and the utility model provides a kind of fiber optic temperature, pressure, steam quality three parameter synchronization on-line measurement systems based on Fibre Optical Sensor reliably.The advantages such as it has that precision is high, efficiency is high, simple to operate, man-machine interaction, for providing a kind of more superior technical scheme in oil reservoir development process.
Summary of the invention
Be not suitable for down-hole high temperature and high pressure environment in order to solve existing downhole temperature, pressure and saturated vapor dryness detection method, there is the technical problem that efficiency is low, accuracy of detection is low, the purpose of this utility model is to provide a kind of fiber optic temperature, pressure, steam quality three parameter synchronization on-line measurement devices, it grasps oil well steam injection situation for solving gas injection type oil temperature, pressure, mass dryness fraction three Parameter Measuring problems.
The utility model solves the scheme that its technical problem adopts:
Steam injection formula oil temperature, pressure, the synchronous on-line measurement device of steam quality, it is characterized in that: comprise the temperature (FBG) demodulator, pressure (FBG) demodulator, reflectivity (FBG) demodulator, Industrial Personal Computer (IPC), the temperature pick up that is positioned at down-hole, pressure sensor, reflectivity sensor and the underground probe that rest on the ground
Described underground probe comprises shell and airtight cylinder is in the enclosure set, and between described shell and airtight cylinder, forms annular space, on described shell wall, is provided with pod apertures, and described annular space is communicated with by pod apertures and underground probe are outside; Upper one end of described shell and airtight cylinder is all fixed on well head place;
Described temperature pick up and reflectivity sensor are all placed in airtight cylinder, and described pressure sensor is positioned at annular space and is fixed on well head place;
The optical fiber that passes through of described temperature pick up is connected with one end of temperature (FBG) demodulator, described pressure sensor is connected with one end of pressure (FBG) demodulator by optical fiber, described reflectivity sensor is connected with one end of reflectivity (FBG) demodulator by optical fiber, and the other end of described temperature (FBG) demodulator, pressure (FBG) demodulator and reflectivity (FBG) demodulator is all connected with Industrial Personal Computer (IPC).
Said temperature sensor is high-temperature resistant optical fiber sensor.
Above-mentioned pressure sensor is optical fiber type FP cavity sensor.
Above-mentioned Industrial Personal Computer (IPC) comprises signal processor, single-chip microcomputer memory and power supply.
The beneficial effect that the utility model has:
1, the utility model adopts optic probe to measure biphase gas and liquid flow reflectivity, optical fiber type FP chamber measuring well downforce, high-temperature resistant optical fiber measurement downhole temperature.Whole system utilizes down-hole pressure to table look-up to obtain density and the refractive index of corresponding saturated vapor and saturation water, then adds the reflectivity of the biphase gas and liquid flow that optic probe measures, and calculates saturated vapor dryness.
2, the utility model adopts reflectivity probe measurement down-hole gas-liquid two-phase reflectivity, adds that down-hole pressure and temperature measure steam quality, and measuring system is simple, without sampling, will have not highly to environment, and operating process is simple.
3, the utility model measuring system is simple, and without the sampling of bleeding, not high to environmental requirement, operating process is simple, and precision is high, online to be measured in real time, is a kind of On-line Measuring Method that is worth very much research.
Accompanying drawing explanation
Fig. 1 is temperature, pressure, mass dryness fraction on-line measurement structure drawing of device;
Fig. 2 is reflectivity sensor measurement principle schematic;
Fig. 3 is pressure sensor structure schematic diagram;
Fig. 4 is the structural representation of underground probe;
Wherein Reference numeral is: 1-shell, the airtight cylinder of 2-, 3-temperature pick up, 4-reflectivity sensor, 5-pod apertures, 6-annular space, 7-pressure sensor.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, this steam injection well temperature, pressure, mass dryness fraction on-line measurement device are made up of temperature pick up, pressure sensor, reflectivity sensor, temperature (FBG) demodulator, pressure (FBG) demodulator, reflectivity (FBG) demodulator, memory, Industrial Personal Computer (IPC) and underground probe.
Industrial Personal Computer (IPC) comprises signal processor and is arranged on the single-chip microcomputer memory on circuit board, and circuit board and supplying cell are arranged in cabinet.
Underground probe comprises shell and airtight cylinder is in the enclosure set, and between shell and airtight cylinder, forms annular space, has been provided with pod apertures on shell wall, and annular space is communicated with by pod apertures and underground probe are outside; Upper one end of shell and airtight cylinder is all fixed on well head place; Temperature pick up and reflectivity sensor are all placed in airtight cylinder, and pressure sensor is positioned at annular space and is fixed on well head place; The optical fiber that passes through of temperature pick up is connected with one end of temperature (FBG) demodulator, pressure sensor is connected with one end of pressure (FBG) demodulator by optical fiber, reflectivity sensor is connected with one end of reflectivity (FBG) demodulator by optical fiber, and the other end of temperature (FBG) demodulator, pressure (FBG) demodulator and reflectivity (FBG) demodulator is all connected with Industrial Personal Computer (IPC).
Pressure sensor is FP cavate, pressure sensor is connected with pressure (FBG) demodulator, reflectivity sensor is connected with reflectivity (FBG) demodulator by optical fiber, temperature pick up is the high-temperature resistant optical fiber being encapsulated in optical cable, high-temperature resistant optical fiber is connected with surface temperature (FBG) demodulator, and temperature signal (FBG) demodulator and pressure signal (FBG) demodulator are connected to Industrial Personal Computer (IPC).Whole system comprises on-line measurement, data analysis, data base administration, data demonstration, man-machine interaction etc.
Temperature pick up adopts high-temperature resistant optical fiber to measure downhole temperature, and down-hole pressure is imported to pressure sensor by down-hole annular, gas-liquid two-phase reflectance varies under albedo measurement probe monitor well.For guarantee monitored data accurately, in real time, the accuracy calculated of uniformity and data analysis, after data acquisition storage, employing Industrial Personal Computer (IPC) carries out collection and the processing of data.
In Fig. 2, what the first half represented is the optical material of popping one's head in reflectivity sensor: wherein incident ray 10 is 11 ° with the angle α of normal, and reflection ray 11 is 11 ° with the angle β of normal; What Lower Half represented is fluid.Can be in the hope of the reflectivity R of gas-liquid two-phase face by this reflectivity sensor, R can represent by the refractive index of incident and outgoing side's medium.
Suppose in steam two phase flow to be measured, the volume ratio of dry saturated steam is xv, and think in the finite time of measuring, vapour, the liquid distribution probability of water vapour are identical on the interface of considering, the reflectivity R of steam two phase flow can be expressed as the function of the reflectivity Rw of steam reflectivity Rv, water and the volume ratio Xv of dry saturated steam so.
When measuring response of refractive index, if can measure the temperature and pressure value of steam injection, just can calculate the density of vapour-liquid, further can draw the mass ratio of dry saturated steam, i.e. thermodynamic (al) mass dryness fraction value.
Wherein, the density of water and steam, the refractive index of water and steam, these parameters are all relevant with temperature and pressure.
Utilize optical fiber FP chamber as pressure sensor, annular space in underground optical cable structure is as pressure introducing equipment, down-hole pressure is passed to after FP cavity pressure sensor, its light intensity wavelength of light wave after incident light and its reverberation are interfered is approximate cyclically-varying (cosine), by detecting the wavelength of two adjacent largest light intensity, just can obtain the long d in chamber in FP chamber, thereby the variation of growing by chamber reflects the variation of down-hole pressure, just can obtain down-hole current pressure by pressure (FBG) demodulator.The left thermal key of LF is to left resonator end surface distance, LFR be right-hand member thermal key to right resonator end surface what, lg is gauge length between thermal key
After pressure is obtained, can obtain now corresponding saturation water and density and the refractive index of saturated vapour by looking into IAPWS-IF97 table.And then can be in the hope of reflectivity Rv, the Rw of saturation water and saturated vapour.
Utilize temperature pick up to realize temperature survey to the whole link in down-hole, wherein underground optical cable is as temperature pick up, can carry out perception to downhole temperature, aboveground temperature (FBG) demodulator is to the optical signal collecting gathers, Data Management Analysis is realized downhole temperature Real-Time Monitoring.
As Fig. 4 structural representation that is underground probe; Adopt high temperature optical fiber as TEMP medium, there is under 350 degree steady operation ability reliably and with long-term, utilize Raman scattering principle, the back-scattering light in optical fiber is analyzed, Raman scattering is caused by molecular thermalmotion, so Raman diffused light carries the temperature information of scattering point.Light in traveling process with optical fiber in particle produce the rear scattered light that inspires of collision, comprise stokes light and anti-Stokes light, wherein in anti-Stokes light, include temperature information, stokes light is to temperature-insensitive as with reference to signal, and the local temperature of optical fiber can be inferred by the strength ratio of stokes light and anti-Stokes light.
Suppose that the wet saturated steam temperature that boiler is demarcated is T, state of matter within the scope of positive and negative 0.5 degree in its boiler is in vapour-liquid two-phase coexistent, temperature T 1 under measuring well simultaneously, if T-0.5≤T1≤T+0.5, at this moment could calculate its mass dryness fraction value, if downhole temperature is not within the scope of it, it is nonsensical calculating mass dryness fraction.
Whole system is worked simultaneously, realizes downhole temperature, pressure, saturated vapor dryness three parameter synchronization on-line measurements.
The utility model, with crossing the reflectivity R that detects current down-hole gas-liquid two-phase face, obtains Rw, Rv by down-hole pressure, and temperature detects and judges whether downhole temperature meets mass dryness fraction calculation requirement.Albedo measurement adopts that optic probe method, precision are high, system stability, temperature detection adopt high-temperature resistant optical fiber detect, respond fast, measurement category is wide, precision is high, pressure sensor adopts optical fiber type FP cavity sensor, detection data are carried out Industrial Personal Computer (IPC) data inversion and are obtained mass dryness fraction numerical value after storing on ground.
Claims (4)
1. steam injection formula oil temperature, pressure, the synchronous on-line measurement device of steam quality, it is characterized in that: comprise the temperature (FBG) demodulator, pressure (FBG) demodulator, reflectivity (FBG) demodulator, Industrial Personal Computer (IPC), the temperature pick up that is positioned at down-hole, pressure sensor, reflectivity sensor and the underground probe that rest on the ground
Described underground probe comprises shell and airtight cylinder is in the enclosure set, and between described shell and airtight cylinder, forms annular space, on described shell wall, is provided with pod apertures, and described annular space is communicated with by pod apertures and underground probe are outside; Upper one end of described shell and airtight cylinder is all fixed on well head place;
Described temperature pick up and reflectivity sensor are all placed in airtight cylinder, and described pressure sensor is positioned at annular space and is fixed on well head place;
The optical fiber that passes through of described temperature pick up is connected with one end of temperature (FBG) demodulator, described pressure sensor is connected with one end of pressure (FBG) demodulator by optical fiber, described reflectivity sensor is connected with one end of reflectivity (FBG) demodulator by optical fiber, and the other end of described temperature (FBG) demodulator, pressure (FBG) demodulator and reflectivity (FBG) demodulator is all connected with Industrial Personal Computer (IPC).
2. steam injection formula oil temperature according to claim 1, pressure, the synchronous on-line measurement device of steam quality, is characterized in that: described temperature pick up is high-temperature resistant optical fiber sensor.
3. steam injection formula oil temperature according to claim 1 and 2, pressure, the synchronous on-line measurement device of steam quality, is characterized in that: described pressure sensor is optical fiber type FP cavity sensor.
4. steam injection formula oil temperature according to claim 3, pressure, the synchronous on-line measurement device of steam quality, is characterized in that: described Industrial Personal Computer (IPC) comprises signal processor, single-chip microcomputer memory and power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320736825.0U CN203685168U (en) | 2013-11-18 | 2013-11-18 | Synchronous on-line measurement device for temperature, pressure and steam quality of steam injection type oil well |
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| CN201320736825.0U CN203685168U (en) | 2013-11-18 | 2013-11-18 | Synchronous on-line measurement device for temperature, pressure and steam quality of steam injection type oil well |
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| CN203685168U true CN203685168U (en) | 2014-07-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615231A (en) * | 2013-11-18 | 2014-03-05 | 中国科学院西安光学精密机械研究所 | Synchronous on-line measurement device for steam-injection type oil well temperature, pressure and steam quality |
| CN105178930A (en) * | 2015-08-17 | 2015-12-23 | 中国石油天然气股份有限公司 | Computing method and device for steam thermal parameters in ground steam injection pipeline |
-
2013
- 2013-11-18 CN CN201320736825.0U patent/CN203685168U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615231A (en) * | 2013-11-18 | 2014-03-05 | 中国科学院西安光学精密机械研究所 | Synchronous on-line measurement device for steam-injection type oil well temperature, pressure and steam quality |
| CN103615231B (en) * | 2013-11-18 | 2016-04-27 | 中国科学院西安光学精密机械研究所 | The synchronous on-line measurement device of steam injection formula oil temperature, pressure, steam quality |
| CN105178930A (en) * | 2015-08-17 | 2015-12-23 | 中国石油天然气股份有限公司 | Computing method and device for steam thermal parameters in ground steam injection pipeline |
| CN105178930B (en) * | 2015-08-17 | 2018-02-02 | 中国石油天然气股份有限公司 | Steam thermal parameter computational methods and device in the steam injection pipeline of ground |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140702 Effective date of abandoning: 20160427 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140702 Effective date of abandoning: 20160427 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |