CN206458460U - Underground survey device and underground survey system - Google Patents
Underground survey device and underground survey system Download PDFInfo
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- CN206458460U CN206458460U CN201621406856.XU CN201621406856U CN206458460U CN 206458460 U CN206458460 U CN 206458460U CN 201621406856 U CN201621406856 U CN 201621406856U CN 206458460 U CN206458460 U CN 206458460U
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Abstract
The utility model discloses a kind of underground survey device and underground survey system, wherein underground survey device includes：First measuring mechanism, first measuring mechanism includes capillary tubing and pressure-transmission tube, and one end of the capillary tubing is connected with the pressure-transmission tube, and the other end of the capillary tubing stretches out packer；The pressure-transmission tube is set on the oil pipe, and the bottom of the pressure-transmission tube offers perforate, and the pressure-transmission tube is in same level with oil reservoir；Second measuring mechanism, second measuring mechanism includes optical fiber tube, and one end of the optical fiber tube is located at well head, and the other end of the optical fiber tube stretches into the packer, the optical fiber tube with the oil reservoir same level at be provided with grating region.The measurement of downhole temperature and pressure can be better achieved in the utility model embodiment.
Description
Technical field
The utility model is related to fields of measurement, more particularly to underground survey device and underground survey system.
Background technology
In oil extraction process, the monitoring and automatic control of live project are indispensable for safety and economic operation, are needed
The temperature and pressure of underground is measured in time.
Particularly, in the pilot test and live project experiment of petroleum thermal recovery, because the temperature, pressure in shaft bottom is all very high,
Continuous measurement and sampling is needed to read underground temperature and pressure.Because the situation of underground survey and required precision are higher thus high-precision, low
Urgently people go to develop the good continuous monitoring oil field well temperature and pressure device of cost, real-time.
Utility model content
At least one of drawbacks described above in order to overcome prior art, technical problem to be solved in the utility model is
At least one of there is provided a kind of underground survey device and underground survey system, it can solve the above problems.
Concrete technical scheme of the present utility model is：
A kind of underground survey device, including：
First measuring mechanism, first measuring mechanism includes capillary tubing and pressure-transmission tube, the one of the capillary tubing
End is connected with the pressure-transmission tube, and the other end of the capillary tubing stretches out packer；The pressure-transmission tube is set on the oil pipe,
The bottom of the pressure-transmission tube offers perforate, and the pressure-transmission tube is in same level with oil reservoir；
Second measuring mechanism, second measuring mechanism includes optical fiber tube, and one end of the optical fiber tube is located at well head, described
The other end of optical fiber tube stretches into the packer, the optical fiber tube with the oil reservoir same level at be provided with grating region.
Preferably, including：Nitrogen conveying mechanism, the nitrogen conveying mechanism includes source nitrogen, connected with the source nitrogen
Pump, the compressor for driving the pump, the pump connects with the capillary tubing.
Preferably, it is provided with pressure transmitter between the pump and the capillary tubing.
Preferably, the underground survey device includes control device, the control device and first measuring mechanism electricity
Property connection, the control device can according to first measuring mechanism generate underground pressure value.
Preferably, stating underground survey device includes control device, and the control device and second measuring mechanism are electrical
Connection, the control device can generate the temperature value of underground according to first measuring mechanism.
Preferably, the underground survey device include control device, the control device respectively with first measuring machine
Structure, second measuring mechanism are electrically connected with, and the control device can generate the pressure of underground according to first measuring mechanism
Value, the control device can generate the temperature value of underground according to first measuring mechanism.
Preferably, the control device can generate underground according to first measuring mechanism and second measuring mechanism
Pressure value.
Preferably, the optical fiber tube includes fibre core, the covering being coated on outside the fibre core, the painting being coated in outside the covering
Coating.
The embodiment of the present application discloses a kind of underground survey system, including：
Underground survey device described above,
Oil pipe；
It is set in the sleeve pipe outside oil pipe；
It is arranged on the packer between the oil pipe and described sleeve pipe.
Preferably, it is additionally provided with safety valve on the oil pipe.
The measurement of downhole temperature and pressure can be better achieved in the utility model embodiment.
Brief description of the drawings
Accompanying drawing described here is only used for task of explanation, and is not intended in any way limit disclosed in the utility model
Scope.In addition, shape and proportional sizes of each part in figure etc. are only schematical, it is used to help to reason of the present utility model
Solution, is not the specific shape and proportional sizes for limiting each part of the utility model.Those skilled in the art is new in this practicality
Under the teaching of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.
Fig. 1 is the structural representation of underground survey device in the embodiment of the present application.
Fig. 2 is the flow chart that the embodiment of the present application measures part.
Fig. 3 be the embodiment of the present application in the second measuring mechanism structural representation.
The reference of the figures above is：1st, sleeve pipe；2nd, oil pipe；3rd, safety valve；4th, packer；5th, tubing head；6th, capillary
Steel pipe；7th, pressure-transmission tube；8th, gas-liquid two-phase interface；9th, pressure tap；10th, optical fiber tube；11st, grating region；A, fibre core；B, covering；C, painting
Coating；D, the first grating region；E, the second grating region.
Embodiment
With reference to the description of accompanying drawing and the utility model embodiment, can clearly it understand of the present utility model
Details.But, embodiment of the present utility model described here is only used for explaining the purpose of this utility model, without
It can be understood as being to limitation of the present utility model in any way.Under teaching of the present utility model, technical staff is contemplated that
Based on any possible deformation of the present utility model, these are regarded as belonging to scope of the present utility model.
It should be noted that when element is referred to as " being arranged at " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article and the technical field of the application is belonged to
The implication that technical staff is generally understood that is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
The arbitrary and all combination of related Listed Items.
Shown in reference picture 1, the embodiment of the present application discloses a kind of underground survey device, and the underground survey device includes first
Measuring mechanism and the second measuring mechanism.First measuring mechanism includes capillary tubing 6 and pressure-transmission tube 7, the capillary tubing 6
One end connected with the pressure-transmission tube 7, the other end of the capillary tubing 6 stretches out packer 4；The pressure-transmission tube 7 is set in institute
State on oil pipe 2 and can be connected with oil pipe 2, the pressure-transmission tube 7 is in same level with oil reservoir.Second measuring mechanism includes
Optical fiber tube 10, one end of the optical fiber tube 10 is located at well head, and the other end of the optical fiber tube 10 stretches into the packer 4, described
Optical fiber tube 10 with the oil reservoir same level at be provided with grating region 11.
The general principle of first measuring mechanism is Pascal's theorem, i.e., the pressure at any point is equal in sealing container.Will
High pressure nitrogen is injected by well head, capillary tubing 6 and pressure-transmission tube 7 is full of nitrogen.The perforate of pressure-transmission tube 7 connects with wellbore fluid
Logical, its volume of interior volume specific ratio capillary tubing 6 is several ten times larger, and scavenging volume is provided for system, is allowed to when down-hole pressure changes, and protects
Hold the basicly stable of the depth of gas-liquid two-phase interface 8 in pressure-transmission tube 7.The pressure of gas is equal to the pressure of well liquid, pressure transmission in pressure-transmission tube 7
Gas pressure transmits pressure to well head by gas in capillary tubing 6 in cylinder 7, and after pressure transmitter is measured, signal is transmitted
To acquisition system, then gas pressure progress data processing of the pressure acquisition system on ground to well head, and then by measuring
The well head pressure come draws the pressure of tested pilot.
Second measuring mechanism includes optical fiber tube 10.Optical fiber tube 10 is both sensor in itself, is signal transmssion line again.Optical fiber tube
10 have fixed refractive index.Optical fiber tube 10 has outside a fibre core A as the propagation ducts of light, fibre core A and had outside covering B, covering B
It is coated with the coat C shielded.Grating is the light sensitive characteristic of the fibre core A materials using optical fiber tube 10, passes through ultraviolet light
The relevant field pattern write-in fibre core A of incident light is produced the refractive index week along fibre core A axial directions by the method for laser explosure in fibre core A
Phase property changes, so as to form the phase grating in space.The electric signal temperature sensor for being functionally similar to point-like of optical fiber tube 10,
Multiple probes can be concatenated in same measure loop, multiple target temperature profiles formulas are quickly measured so as to realize.
A specific embodiment of underground survey device in the application is described below.
Specifically, shown in reference picture 1, in the present embodiment, underground part can include：Oil pipe 2, it is set in oil pipe 2
Outer sleeve pipe 1, for the safety valve 3 being controlled to oil pipe 2, the packer being arranged between the oil pipe 2 and described sleeve pipe 1
4th, the tubing head 5 being connected with oil pipe 2.Capillary tubing 6 is located on packer 4, capillary tubing 6 stretched into from well head in oil reservoir and with
Pressure-transmission tube 7 is connected.Optical fiber tube 10 is located on packer 4, and optical fiber tube 10 is stretched into oil reservoir from well head.Safety valve 3 can be to oil
Pressure in pipe 3 is controlled.
Described in reference picture 2, the above ground portion of underground survey device includes：Nitrogen conveying mechanism, safety purge system, broadband
Light source, temperature transmitter, pressure transmitter, acquisition system, data processor, PC.
The nitrogen conveying mechanism includes source nitrogen, the pump connected with the source nitrogen, the compression for driving the pump
Machine, the pump is connected with the capillary tubing 6.
Nitrogen conveying mechanism can be injected high pressure nitrogen by well head, capillary tubing 6 and pressure-transmission tube 7 is full of nitrogen.
Pressure-transmission tube 7 is connected with capillary tubing 6, is full of inert gas (nitrogen) in pressure-transmission tube 7, the pressure-transmission tube 7 with capillary tubing 6 together
Measured position under lower going-into-well, the inert gas that will not enter for guarantee well liquid full of pressure-transmission tube 7 in capillary tubing 6, pressure-transmission tube 7
Periodically to be supplemented, with the gas-liquid face balance for maintaining well liquid to be contacted with gases at high pressure.According to Pascal's theorem, well liquid pressure with
Gas pressure in pressure-transmission tube 7 is equal, by gas in capillary tubing 6 by the pressure transmission in pressure-transmission tube 7 to ground, on ground
It is that underground is tested point pressure that gas pressure is read on face with gas column pressure sum in capillary tubing 6.Underground pressure force value=well head
The pressure value that nitrogen post is produced in the pressure value measured+pressure measurement capillary tubing 6.Pressure transmitter pressure signal can be changed to
The electric signal of system identification can be collected, the electric signal received is delivered to data processor by acquisition system, then by data
Reason device feeds back to PC (personal computer) machine.
In the present embodiment, the second measuring mechanism includes two grating regions 11.Each grating region 11 corresponds respectively to one
Individual oil reservoir, grating region 11 is located at the horizontal plane of corresponding oil reservoir.
Shown in reference picture 3, wideband light source can convey light into optical fiber tube 10.When broadband light/incident light passes through
During one grating region D, the light of the first grating region D wavelength is met in spectrum to be reflected, and forms reflected light 1, its commplementary wave length
Light will occur through the first grating region D light for continuing to propagate to the wavelength that the second grating region E is met in the second grating region E, spectrum
Reflection, forms reflected light 2.When ambient temperature changes, bragg wavelength changes therewith.Therefore, by accurately
Measure the variable quantity of the bragg wavelength of optical grating reflection light, it is possible to obtain the temperature residing for fiber grating area.Pressure transmitter
The signal of sensor can be changed to the electric signal of system identification can be collected, acquisition system conveys the electric signal received
PC (personal computer) machine is fed back to data processor, then by data processor.Temperature transmitter can be by temperature
Signal is changed to that can be collected the electric signal of system identification, and the electric signal received is delivered to data processor by acquisition system,
PC (personal computer) machine is fed back to by data processor again.
Preferably, the underground survey device include control device, the control device respectively with first measuring machine
Structure, second measuring mechanism are electrically connected with, and the control device can be according to first measuring mechanism and second measurement
Mechanism generates the pressure value of underground, and the control device can generate the temperature value of underground according to first measuring mechanism.
The pressure value that nitrogen post is produced in the pressure value that underground pressure force value=well head is measured+pressure measurement capillary tubing 6.
Pj- testing pressure down hole point pressure, Pa；Pk- well-head pressure-measuring point pressure, Pa；PdThe pressure that-nitrogen post is produced, Pa.
Because the temperature of nitrogen, pressure are along longitudinally varying larger.Thus the calculating to nitrogen column pressure carries out segment processing,
Nitrogen post is divided longitudinally into n equal portions along capillary, approximately equal is may be considered for the pressure in each section of capillary, temperature
's.Nitrogen is in hyperbaric environment in the capillary of underground, belongs to imperfect gas, here using RK (Redlie-k Kwo ng) sides
Journey：
Pi=RTi/(vi-b)-a/Ti 0.5vi(vi+b)
In formula:PiPressure in-the i-th section of capillary, Pa
TiTemperature in-the i-th section of capillary, K (is measured) by distributed fiber grating temperature sensor
Vi, the molal volume in-the i-th section of capillary, m3/mol
A=ΩaR2Tc 2.5/Pc, b=ΩbRTc/Pc, wherein Ωa=0.41748, Ωb=0.08664, R- gas constant, take
8.314KJ/(kg.K)。
Pc,TcRespectively He critical pressure and critical-temperature, take Pc=0.1146039Mpa, Tc=3.3187K.
By formula (1), it is known that Pi、TiCan be in the hope of molal volume Vi:
Vi=f (Pi,Ti)
Density in i-th section of capillary is:
ρi=M/Vi
The molal weight of M-nitrogen, 0.02801s Kg/mol
I+1 section capillary in pressure be:
Pi+1=Pi+ρig H/n。
The capillary pressure measuring technology of current field application generally uses the mean temperature T of estimation, and under real well in capillary
Temperature is along longitudinally varying larger, and temperature is also changed over time.Distributed fiber grating temperature sensor can be with very high-precision
Degree and resolution ratio obtain downhole temperature distribution, carry out temperature-compensating to the pressure of pressure tap 9 using real time temperature Ti, effectively mend
The influence of temperature has been repaid, pressure measurement precision is improved 0.1%-0.5%.
The embodiment of the present application discloses a kind of underground survey device, and the underground survey device can use distribution type fiber-optic light
The real time temperature distribution that grid temperature sensor is measured carries out temperature-compensating to the manometric technique of capillary tubing 6, has effectively compensated for temperature
The influence of degree, allows pressure measurement precision to improve 0.1%-0.5%.Its monitoring result can be for：Try to achieve injectability, the life of well
Production capacity power and oil reservoir flow resistance data；Firmly believe equipment and the pressure duty condition of oil well, if safety pressure limits with
It is interior；Observed by continuous temperature and pressure, draw the characteristic and state aspect data in oil reservoir；Abundant Remaining Oil, is to improve exploitation
The key of effect.Continuous monitoring oil field well T-P environment is applied to marine, land straight well, the individual layer of inclined shaft and layering and surveyed
Examination；Suitable for the well of various oil production methods, heavy oil wells and high temperature well are particularly adapted to, the deficiency of other method of testings is compensate for.
The characteristics of with continuous, long-term, direct-reading.Any adverse circumstances are adapted to, it is quite varied in field use prospect.
Monitoring in real time and adjustment control in time are carried out to scene, computer supervisory control system is applied at the scene.Institute
There are key and many needs temperature, pressure and other parameters to be monitored on-line with a microprocessor data harvester, prison
Survey time interval on demand or a certain set time, microprocessor recorded data and alarm, count while these data are supplied
Calculation machine, computer can be as needed, continuously provides and record all output datas, data history records and trend, image
Deng.The data acquisition of this use computer and warning system greatly facilitate understanding injection, oil reservoir and production process, simultaneously
The safety and saving manpower of guarantee project.
A kind of underground survey system, including：Underground survey device described above；Oil pipe 2；It is set in the sleeve pipe outside oil pipe 2
1；It is arranged on the packer 4 between the oil pipe 2 and described sleeve pipe 1.
The underground survey system can be to downhole temperature and pressure monitoring, can show, record, store downhole temperature pressure
Power, generates data text, and reference pressure value is obtained by depth and temperature in wellbore compensating approach, draws temperature, pressure curve, makees
Go out explain report, be easy to oil work research and progress, oil well productivity can be better anticipated, determine reasonable working system and
Analyze oil well productivity changing rule and quantitatively determine reservoir pressure, temperature, in-place permeability and physical properties of fluids, adjust the block
Development plan.Underground survey system is referred to foregoing description, is not repeated herein.
It should be noted that in the description of the present application, term " first ", " second " etc. are only used for description purpose and difference
Similar object, between the two and in the absence of sequencing, can not be interpreted as indicating or implying relative importance.In addition,
In the description of the present application, unless otherwise indicated, " multiple " are meant that two or more.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
Between the difference of other embodiment, each embodiment identical similar part mutually referring to.
Above-described embodiment is only to illustrate technical concepts and features of the present utility model, and its object is to allow be familiar with technique
Personage can understand content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.
All equivalent change or modifications made according to the utility model Spirit Essence, should all cover protection domain of the present utility model it
It is interior.
Claims (10)
1. a kind of underground survey device, it is characterised in that including：
First measuring mechanism, first measuring mechanism include capillary tubing and pressure-transmission tube, one end of the capillary tubing with
The pressure-transmission tube connection, the other end of the capillary tubing stretches out packer；The pressure-transmission tube is set on oil pipe, the pressure transmission
The bottom of cylinder offers perforate, and the pressure-transmission tube is in same level with oil reservoir；
Second measuring mechanism, second measuring mechanism includes optical fiber tube, and one end of the optical fiber tube is located at well head, the optical fiber
The other end of pipe stretches into the packer, the optical fiber tube with the oil reservoir same level at be provided with grating region.
2. underground survey device according to claim 1, it is characterised in that including：Nitrogen conveying mechanism, the nitrogen is defeated
Mechanism is sent to include source nitrogen, the pump connected with the source nitrogen, the compressor for driving the pump, the pump and the capillary
Steel pipe is connected.
3. underground survey device according to claim 2, it is characterised in that set between the pump and the capillary tubing
There is pressure transmitter.
4. underground survey device according to claim 1, it is characterised in that the underground survey device includes control and filled
Put, the control device is electrically connected with first measuring mechanism, and the control device can be according to first measuring mechanism
Generate the pressure value of underground.
5. underground survey device according to claim 1, it is characterised in that the underground survey device includes control and filled
Put, the control device is electrically connected with second measuring mechanism, and the control device can be according to first measuring mechanism
Generate the temperature value of underground.
6. underground survey device according to claim 1, it is characterised in that the underground survey device includes control and filled
Put, the control device is electrically connected with first measuring mechanism, second measuring mechanism respectively, the control device energy
The pressure value of underground is generated according to first measuring mechanism, the control device can generate well according to first measuring mechanism
Under temperature value.
7. underground survey device according to claim 6, it is characterised in that the control device can be surveyed according to described first
Measuring mechanism and second measuring mechanism generate the pressure value of underground.
8. underground survey device according to claim 1, it is characterised in that the optical fiber tube includes fibre core, is coated on institute
State the covering outside fibre core, the coat being coated in outside the covering.
9. a kind of underground survey system, it is characterised in that including：
Underground survey device as described in any one of claim 1 to 8,
Oil pipe；
It is set in the sleeve pipe outside oil pipe；
It is arranged on the packer between the oil pipe and described sleeve pipe.
10. underground survey system according to claim 9, it is characterised in that be additionally provided with safety valve on the oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201621406856.XU CN206458460U (en) | 2016-12-21 | 2016-12-21 | Underground survey device and underground survey system |
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| CN201621406856.XU CN206458460U (en) | 2016-12-21 | 2016-12-21 | Underground survey device and underground survey system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708713A (en) * | 2018-05-28 | 2018-10-26 | 成都威尔普斯石油工程技术服务有限公司 | The measurement technique of well logging is cutd open in a kind of producing well production |
| CN111980684A (en) * | 2019-05-05 | 2020-11-24 | 中国石油天然气股份有限公司 | Continuous tube temperature and pressure monitoring optical cable and manufacturing method thereof |
-
2016
- 2016-12-21 CN CN201621406856.XU patent/CN206458460U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708713A (en) * | 2018-05-28 | 2018-10-26 | 成都威尔普斯石油工程技术服务有限公司 | The measurement technique of well logging is cutd open in a kind of producing well production |
| CN111980684A (en) * | 2019-05-05 | 2020-11-24 | 中国石油天然气股份有限公司 | Continuous tube temperature and pressure monitoring optical cable and manufacturing method thereof |
| CN111980684B (en) * | 2019-05-05 | 2023-09-26 | 中国石油天然气股份有限公司 | Coiled tubing temperature and pressure monitoring optical cable and manufacturing method thereof |
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