CN102072844A - Self-absorption evaluation instrument of core capillary - Google Patents
Self-absorption evaluation instrument of core capillary Download PDFInfo
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- CN102072844A CN102072844A CN 201010559165 CN201010559165A CN102072844A CN 102072844 A CN102072844 A CN 102072844A CN 201010559165 CN201010559165 CN 201010559165 CN 201010559165 A CN201010559165 A CN 201010559165A CN 102072844 A CN102072844 A CN 102072844A
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Abstract
The invention provides a self-absorption evaluation instrument of a core capillary, which comprises a measuring part, a bearing part and a data processing part and mainly comprises an electronic balance, an intelligent LCR (inductance, capacitance, resistance) measuring instrument, a sealing bracket, a lifting platform, a camera, a wide-mouth container with a slit cover, and measuring electrodes, wherein the length of the lifting connecting rod of the lifting platform can be adjusted, thereby adjusting the immersion depth of a core in self-absorption fluid; the electronic balance can not bear load in the self-absorption course; the balance is calibrated, thereby weakening and eliminating the drifting influence of the balance; the measuring electrodes are annularly and tightly wound on the surface of the core; and the intelligent LCR measuring instrument measures the resistivity change between any two electrodes in the self-absorption course of the core. The invention has the advantage of high automation degree, can monitor the quality of the core in the self-absorption course of the core and the change of the resistivity between two electrodes, and evaluates the fluid self-absorption capability of the core.
Description
Technical field
The present invention relates to oil and Gas Industry, specifically is the experimental facilities that a kind of oil and gas reservoir rock self-priming liquid ability is estimated.
Background technology
The hollow billet self-priming is the focus of subject researchs such as pedology, ground, cytology.Increase along with hydrocarbon resources demand and energy decline type (or low pressure negative pressure) hydrocarbon-bearing pool improves the theme that the rate of oil and gas recovery has become the oil-gas mining technology to greatest extent.The effect of hollow billet self-priming is an important mechanism of water displacing oil gas reservoir and fractured reservoirs exploitation, mass-energy transmission between fractured reservoirs matrix and the crack is undertaken by the effect of hollow billet self-priming, and mass-energy transfer rate has between the two determined the oil and gas production of such hydrocarbon-bearing pool.
Rock hollow billet self-priming speed is influenced by initial aqueous saturation degree, wetting state, interfacial tension, fracture parameters, rerum natura and pore texture mainly, therefore, also become the important directions of following hypotonic porous medium fundamental property by hollow billet self-priming behavior inverting porous medium character.
Current hollow billet self-priming behavioral study is primarily aimed at profit-senior middle school's infiltration rock mainly by balance measurement porous medium water absorbing capacity over time.Along with declining to a great extent and the increase day by day of oil gas demand of conventional gas and oil resource output, low-permeability oil deposit, tight gas reservoir (comprising DAMAGE OF TIGHT SAND GAS RESERVOIRS, dense carbonate gas reservoir and shale gas reservoir) are demanded large-scale development urgently.Hollow billet self-priming theory is the secondary oil recovery or the basis of improving recovery ratio from LOW PERMEABILITY RESERVOIR.Hollow billet self-priming behavioral study makes the hydrocarbon-bearing pool waterflooding of low pressure negative pressure or energy decline obtain very big effect.
Yet, because the low permeability reservoir hole is tiny, water absorbing capacity is few, because the drift and the evaporation of balance, the balance suspension method studied that hypotonic rock hollow billet self-priming behavior meeting occurs that water absorbing capacity constantly increases always or phenomenons such as fluctuation in the past, and serious interfering data is handled and the deep understanding of hollow billet self-priming behavior.
Summary of the invention
The objective of the invention is to: a cover hollow billet self-priming evaluating apparatus is provided, and the automaticity height has overcome the deficiency that existing hollow billet self-priming apparatus is studied hypotonic rock hollow billet self-priming.
The technology implementation scheme that the present invention adopts is:
A kind of rock core hollow billet self-priming is estimated instrument, comprising: measure portion, bearing part and data processing section.
Described bearing part is a jacking system, is furnished with a large container on the lift side of jacking system, fills self-priming liquid in the large container, and rock core to be measured is suspended in the large container;
Described measure portion comprises apparatus for measuring quality, electric resistance measuring apparatus, and the corresponding rock core to be measured of the signal input part of apparatus for measuring quality, electric resistance measuring apparatus and monitoring device, signal output part connect data processing apparatus;
Described data processing section is a computing machine, and the quality, resistance and the monitor signal that receive are handled computing.
Described bearing part is arranged in the sealed support, and sealed support is a seal, isolated outside air.
Described jacking system comprises lifting table, lifting linking member and the lifting table base that interconnects movable cooperation, and the height of lifting linking member can be regulated, and large container is placed on the lifting table.
Described apparatus for measuring quality is an electronic balance, and described apparatus for measuring quality is an electronic balance, and the mass measurement end of electronic balance connects rock core to be measured, signal output part is connected to computing machine.
Described electronic balance surface arrangement has seal closure.
The measuring junction of described electronic balance is provided with hook, and hook connects suspension rock core, the non-telescoping bending of fine rule by fine rule.
Described electric resistance measuring apparatus comprises potential electrode and the electric bridge instrument that connects successively, and potential electrode is close to core surface winding to be measured, and the signal output part of electric bridge instrument is connected to computing machine.
Described monitoring device is a picture pick-up device, and signal output part is connected to computing machine.
Described large container is a transparent vessel.
Described large container inner bottom part is furnished with the rock core pad.
The technique effect that the present invention produced
The present invention is a reservoir protection and the experimental facilities that improves the recovery ratio aspect in a kind of oil and the natural gas exploration and development process.This rock core hollow billet self-priming is estimated instrument can further investigate the behavior of hollow billet self-priming, especially the behavior of hypotonic rock hollow billet self-priming, can monitor the variation of resistivity and self-priming forward position between rock core self-priming process rock core quality, two electrodes, also but preferred oil gas field working fluid is monitored hydrocarbon-bearing pool limit, end water intrusion speed etc. in the oil and gas development process.This rock core hollow billet self-priming is estimated the automaticity height of instrument, has overcome the deficiency that conventional hollow billet self-priming apparatus is studied hypotonic rock hollow billet self-priming, has eliminated continuous the increasing or wave phenomenon of water absorbing capacity that balance drift and evaporation produce as far as possible.This rock core hollow billet self-priming is estimated the powerful of instrument, mainly contains following several big function:
(1) variation of weight and average staturation in the monitoring rock core self-priming process;
(2) variation of rock core resistivity between two electrodes in the monitoring rock core self-priming process;
(3) speed of monitoring rock core self-priming process core surface liquid phase rising;
(4) measure liquid phase self-priming speed in the rock core self-priming process;
(5) oil phase or the gas phase residual saturation of measurement rock core water self-priming.
The present invention compared with prior art has following advantage:
(1) weakens balance drift and evaporation influence to the water absorbing capacity test;
(2) can measure two electrode resistance rates variation in the rock core self-priming process, screen fluids by two interelectrode times by the self-priming fluid;
(3) online at any time is taken rock core self-priming photo, the leading edge locus of monitoring core surface self-priming fluid;
(4) automaticity height, experiment rock core suction weight change, resistance between electrode rate change, the shooting of self-priming photo is carried out after all adopting computer program to set automatically.
Description of drawings
Fig. 1 is that reservoir core hollow billet self-priming is estimated the instrument structural representation.
Code name implication among the figure: 1-electronic balance; 2-cloche; 3-hook; 4-fine rule; 5-sealed support; 6-large container; 7-rock core; 8-potential electrode; 9-self-priming liquid; 10-rock core pad; 11-lifting table; 12-lifting linking member; 13-lifting table base; 14-lid; 15-contact conductor mouth; 16-intelligent LCR electric bridge instrument; 17-camera; 18-computing machine.
Embodiment
As shown in Figure 1, the present invention is that a kind of rock core hollow billet self-priming is estimated instrument, comprising: bearing part, mechanical part and data processing section:
Data processing section is a computing machine 18, and the signal output part of measure portion connects the signal input part of computing machine 18.
The bearing part is a jacking system.Jacking system is arranged in the inside of sealed support 5, and sealed support 5 adopts the material of secluding airs to make, and makes the inside and the isolate from outer air of sealed support 5 to make that promptly jacking system is that the bearing part completely cuts off with sealed support 5 air outside.Present embodiment, sealed support 5 is six cubic types, and seamed edge adopts stainless steel to make, and plays the effect of stablizing electronic balance 1, six are adopted windshield to make, and can play the purpose to the influence of electronic balance measurement accuracy such as the environmental change that reduces air flow.
Jacking system comprises lifting table 11, lifting linking member 12 and lifting table base 13.Lifting table 11 is platforms of placing large container 6.Also be connected with lifting linking member 12 and lifting table base 13 down in turn.Lifting table base 13 is arranged on the inner bottom surface of sealed support 5, the adjustable in length of lifting linking member 12, and stiff end links to each other with lifting table base 13, lift side is connected lifting table 11.Lifting table 11 is platforms of placing large container 6, and large container 6 is a transparent vessel, and inside fills self-priming liquid 9, and the bottom is placed with rock core pad 10.Rock core 7 to be measured is suspended on the inside of large container 6 by fine rule 4.By the length of adjusting lifting linking member 12, thereby the height of adjusting lifting table 11 is promptly regulated the height of large container 6, thereby regulates the immersion depth of rock core 7 in self-priming fluid 9.In the present embodiment, large container 6 is made for clear glass, and the top is furnished with lid 14, and has a slit on this lid 14, can be so that hanging the fine rule 4 of rock core 7 pass, and the structure of slit can reduce the evaporation of self-priming liquid 9 simultaneously.The side arrangement of large container 6 has the contact conductor mouth 15 of potential electrode 8.
Measure portion comprises apparatus for measuring quality, electric resistance measuring apparatus and monitoring device, and apparatus for measuring quality is connected rock core to be measured with electric resistance measuring apparatus one end, and an end connects data processing apparatus;
Apparatus for measuring quality is an electronic balance 1.The surface arrangement of electronic balance 1 has seal closure, makes electronic balance 1 and air isolated, is not subjected to ectocine.Present embodiment adopts cloche 2, reduces the influence that external interference is measured rock core 7 quality to electronic balance 1.The mass measurement end of electronic balance 1 connects rock core 7 to be measured, signal output part is connected to computing machine 18.Present embodiment connects in the following ways: the measuring junction of electronic balance 1 is provided with a hook 3, and the fine rule 4 that hangs rock core 7 is connected on the hook 3.And hook 3 is made for insulating material, and fine rule 4 non-telescoping bendings are that static(al) rope material makes.By above-mentioned connection, the signal input part of electronic balance 1 collects the mass parameter of rock core 7, and signal output part is connected with computing machine 18 by data line.Rock core 7 is in the self-priming process, and the variation of weight is measured the back by the Automatic Program collection on the computing machine 18 by electronic balance 1.
The capture program that electric resistance measuring apparatus is mainly in intelligent LCR electric bridge instrument 16, potential electrode 8 and the computing machine 18 is formed.Potential electrode 8 is close to rock core 7 surface windings, and its signal output part is connected to the signal input part of intelligent LCR electric bridge instrument 16 by the contact conductor mouth 15 of large container 6 sides.Intelligent LCR measuring 16 is measured rock core 7 in the self-priming process, and any two resistance between electrode rates change, monitoring rock core 7 suction positions, forward position.
Monitoring device is a picture pick-up device, and present embodiment adopts camera 17, and camera 17 is installed in sealed support 5 inside, and output terminal is connected to computing machine 18.
Camera system is made up of the image capture software in camera 17 and the computing machine 18.
Using method of the present invention is as follows:
Operation lifting table 11 raises, and when large container 6 arrives certain altitude, makes rock core 7 contact with rock core pad 10; Continue operation lifting table 11 and raise, make rock core 7, make that the fine rule 4 that hangs rock core 7 is slowly lax, no longer stressed along with rock core pad 10 raises; At last, make fine rule 4 break away from hook 3 under the electronic balance 1 gradually, promptly make electronic balance 1 no longer carry the weight of rock core 7.At this moment, link up with 3 zero loads, under this state, can school electronic balance 1, weaken and eliminate the influence of electronic balance 1 drift.
Proofreaied and correct after the electronic balance 1, operation lifting table 11 reduces, and when large container 6 is reduced to certain altitude, makes the fine rule 4 that hangs rock core 7 hang over again on the hook 3 under the electronic balance 1, promptly makes the weight of electronic balance 1 carrying rock core 7; Continue operation lifting table 11 and reduce, make rock core 7 separate with rock core pad 10, electronic balance 1 carries the weight of rock core 7 fully.
So, change the height of lifting table 11 again, promptly change the immersion depth of rock core 7 in self-priming fluid 9.By the electronic balance 1 real-time mass change of measuring in the rock core 7 self-priming processes, and computing machine 18 records and the data processing in later stage.
In the potential electrode 8 monitoring rock cores 7 self-priming processes, the variation of rock core resistivity between two electrodes, and the contact conductor mouth by data line and large container 6 sides 15 links to each other, again by being connected and processing of intelligent LCR electric bridge instrument 16, transmit and be kept in the computing machine 18.
Camera 17 is taken the self-priming photos, and links to each other with computing machine 18 by data line, monitor data is transmitted and is kept in the computing machine 18.
By parameters such as computing machine 18 binding times, self-priming liquid, calculate in the rock core 7 self-priming processes parameters such as the oil phase of the speed that the variation of average staturation, core surface liquid phase rise, liquid phase self-priming speed, water self-priming or gas phase residual saturation.
Claims (10)
1. a rock core hollow billet self-priming is estimated instrument, comprising: measure portion, self-priming part and data processing section is characterized in that:
Described self-priming partly comprises suspension and liquid level regulating system, and suspension hangs rock core to be measured, and its suspension height is fixed; The liquid level regulating system is a large container that is provided with jacking gear, and large container inside fills self-priming liquid, and rock core is arranged in large container inside;
Described measure portion comprises apparatus for measuring quality, electric resistance measuring apparatus, and the corresponding rock core to be measured of the signal input part of apparatus for measuring quality, electric resistance measuring apparatus and monitoring device, signal output part connect data processing apparatus;
Described data processing section is a computing machine, and the quality, resistance and the monitor signal that receive are handled computing.
2. rock core hollow billet self-priming according to claim 1 is estimated instrument, and it is characterized in that: described self-priming partly is arranged in the sealed support, and sealed support is a seal, isolated outside air.
3. rock core hollow billet self-priming according to claim 1 is estimated instrument, it is characterized in that: described jacking gear is arranged on the large container bottom, comprise interconnecting movable lifting table, lifting linking member and the lifting table base that cooperates, the lifting table base is fixed, and the height of lifting linking member can be regulated.
4. rock core hollow billet self-priming according to claim 1 is estimated instrument, and it is characterized in that: described apparatus for measuring quality is an electronic balance, and the mass measurement end of electronic balance connects rock core to be measured, signal output part is connected to computing machine.
5. rock core hollow billet self-priming according to claim 4 is estimated instrument, and it is characterized in that: described electronic balance surface arrangement has seal closure.
6. rock core hollow billet self-priming according to claim 4 is estimated instrument, and it is characterized in that: the measuring junction of described electronic balance is provided with hook, and hook connects suspension rock core, the non-telescoping bending of fine rule by fine rule.
7. rock core hollow billet self-priming according to claim 1 is estimated instrument, it is characterized in that: described electric resistance measuring apparatus comprises potential electrode and the electric bridge instrument that connects successively, potential electrode is close to core surface winding to be measured, and the signal output part of electric bridge instrument is connected to computing machine.
8. rock core hollow billet self-priming according to claim 1 is estimated instrument, and it is characterized in that: described monitoring device is a picture pick-up device, and signal output part is connected to computing machine.
9. rock core hollow billet self-priming according to claim 1 is estimated instrument, and it is characterized in that: described large container is a transparent vessel.
10. rock core hollow billet self-priming according to claim 1 is estimated instrument, and it is characterized in that: described large container inner bottom part is furnished with the rock core pad.
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Application publication date: 20110525 |