CN107882539B - One kind being based on CO2Crude oil mass transfer improves the experimental provision and method for streaming oil recovery factor - Google Patents
One kind being based on CO2Crude oil mass transfer improves the experimental provision and method for streaming oil recovery factor Download PDFInfo
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- CN107882539B CN107882539B CN201711081712.0A CN201711081712A CN107882539B CN 107882539 B CN107882539 B CN 107882539B CN 201711081712 A CN201711081712 A CN 201711081712A CN 107882539 B CN107882539 B CN 107882539B
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- 238000011084 recovery Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012546 transfer Methods 0.000 title claims description 18
- 239000011435 rock Substances 0.000 claims abstract description 170
- 239000010779 crude oil Substances 0.000 claims abstract description 129
- 239000003921 oil Substances 0.000 claims abstract description 108
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 claims abstract description 39
- 238000002474 experimental method Methods 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000004088 simulation Methods 0.000 claims abstract description 8
- 229920001971 elastomer Polymers 0.000 claims description 36
- 238000000605 extraction Methods 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- 238000005253 cladding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
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- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses one kind to be based on CO2Crude oil effect of mass transmitting improves the experimental provision and experimental method for streaming oil recovery factor, mainly includes improved core holding unit, and for coating the rock core of saturated oils, the occurrence status of crude oil is streamed in simulation, while providing CO2With the high temperature and high pressure environment of crude oil effect of mass transmitting, experimental provision can be used for studying the raising of CO2- crude oil effect of mass transmitting and stream adaptability, best method of gas injection and condition of oil recovery factor etc..The present invention has the advantages that streaming adaptability, best method of gas injection and condition of oil recovery factor etc. for studying the raising of CO2- crude oil effect of mass transmitting；The research that oil recovery factor is streamed in raising is offered reference；The technical thought for streaming oil recovery factor is improved, i.e., oil recovery factor is streamed by the raising of the effect of mass transmitting of CO2 and crude oil, is not limited solely to conventional gas entry profile adjustment.
Description
Technical field
The present invention relates to Oil-Gas Field Development Engineering technical fields, in particular to a kind of to be based on CO2Crude oil effect of mass transmitting improves
Stream the experimental provision and method of oil recovery factor.
Background technique
CO2The displacement of reservoir oil with to bury be current one of focus for improving oil recovery factor and inhibit greenhouse effects research.CO2Have
Good oil-displacement capacity, mixed phase drives recovery ratio theoretically up to 100%, and at the same time realizing CO2Ground storage.And CO2It is main
One of greenhouse gases wanted, 66% or more climate warming discharge CO with mankind's activity2It is related.On the climate Conference of Copenhagen, I
State promises to undertake, arrives the year two thousand twenty, per GDP CO2Discharge decline 40%~45% in than 2005.Therefore, people to utilize CO2The displacement of reservoir oil,
CO is realized simultaneously2It buries, places high hopes.
Due to the heterogeneity of oil reservoir, especially hypotonic, crack in ultralow permeable reservoir influence, CO2When injecting stratum,
Easily along hypertonic or crack channelling, is formed at hypotonic position and largely stream crude oil.Has channeling, which becomes, influences CO2Drive the main of effect
One of problem.After channelling, CO2Cannot directly drive and stream crude oil, but its there are still mass transfers, including CO between crude oil2?
Dissolution in crude oil and the extraction to crude oil, this effect of mass transmitting become the pass streamed crude oil row drive and improve recovery ratio
Key.CO2Dissolution in crude oil can expand crude oil, reduce viscosity of crude, and volume expansion multiple is up to 1.4 times or more；CO2It is right
The extraction yield of crude oil is up to 60% or more.CO2The raising of crude oil effect of mass transmitting streams oil recovery factor adaptability, streams crude oil most
Good row drives condition and method of gas injection research, to improvement CO2Drive it is most important, and rarely seen correlative study report.Indoor physical simulation
Experiment is research CO2One of oil-displacement capacity and the main means of feature.In simulated experiment, in order to guarantee experimentation and reality
The similitude of reservoir condition, real simulation CO2With the function Characteristics for streaming crude oil, experimental provision used should be able to realize following three
Point；1) guarantee CO2Direct displacement is not formed to crude oil, but passes through CO2Diffusion, effect of mass transmitting in crude oil contact process improve
Oil recovery factor；2) guarantee CO2With stream coming into full contact with for crude oil, to realize CO2The mass transfer of crude oil；3) research vehicle seeps
Saturating rate and size are controllable, stream crude oil with simulate different permeabilities and scale.Due to passing through CO2The raising of crude oil mass transfer is streamed
The correlative study of oil recovery factor is less, and mature experimental provision can not utilize directly, traditional CO2Flooding apparatus, it is difficult
It is 3 points above to realize simultaneously.
The prior art one: in order to study CO2To the displacement capability of crude oil, people devise a kind of conventional CO2Displacement of reservoir oil dress
It sets, mainly investigates CO2Ability is directly driven to crude oil, cannot be directly used to research CO2The raising of crude oil effect of mass transmitting is streamed
Oil recovery factor.Apparatus of the present invention and routine CO2The difference of flooding apparatus is mainly reflected on core holding unit, comprising: 1. is real
Test the difference of process.In conventional oil displacement experiment, CO2From entrance 201 inject, direct driving effect is formed to crude oil, finally from
Outlet extraction.And in effect of mass transmitting oil displacement experiment, CO2It injects, is then produced from outlet 212, CO from entrance 2112It will not be right
Crude oil forms direct displacement effect, is only capable of passing through CO2Crude oil effect of mass transmitting improves recovery ratio.2. the improvement of device.In rock core
A contact chamber 213, the CO injected in this way from entrance 211 are provided on the right side of clamper2Can contact chamber 213 in and crude oil
Sufficient face contact is formed, realizes CO2Dissolution into crude oil and the extraction to crude oil.Improved experimental provision can be from
The following aspects guarantees it to CO in practical oil reservoir2The accuracy of displacement delay crude oil process simulation: 1.CO2It will not be to crude oil
Formation directly drives, and is only capable of improving oil recovery factor, this and CO in practical oil reservoir by effect of mass transmitting2Oil recovering is streamed in raising
The main mechanism of rate is consistent.2. the contact chamber on the right side of clamper can guarantee CO2Sufficient face contact is formed with crude oil, is simulated hypertonic
CO in channel or crack2Contact relation between crude oil.3. can be simulated in actual formation by the method for change rock core length
Stream the scale or scale of crude oil.4. carrying out part closure to rock core right end face using chemical adhesive, reality can be simulated
CO in stratum2With the variation of crude oil contact area.
Conventional CO2In flooding apparatus, CO2Crude oil formation can be directly driven, cannot be simulated the characteristics of streaming crude oil.It streams
The most outstanding feature of crude oil is exactly to be difficult to by CO2It directly drives, CO can only be passed through2Crude oil effect of mass transmitting improves recovery ratio.2) do not have
There is setting CO2Crude oil contacts chamber, it is difficult to guarantee CO2Crude oil come into full contact with and mass transfer.
The prior art two: people are in research CO2Handle up the mode displacement of reservoir oil when, in conventional CO2On the basis of flooding apparatus, to reality
Process is tested to be improved.CO2It is injected from entrance 211, is then produced from outlet 212, reduce CO2To the straight of rock core Crude Oil
Connect driving effect.But CO is not provided in experimental provision2The contact chamber 213 of crude oil, is on the one hand difficult to ensure CO2Crude oil
It comes into full contact with, on the other hand the high pressure CO of injection2Lack and contacted intracavitary buffering, has been easy to be directly entered rock core end, it is right
End crude oil forms displacement, rather than enters by way of molecule is spread, to CO2The result of crude oil mass transfer raising recovery ratio
It has an impact.And the experimental result that the present invention obtains can more be simulated and stream crude oil and be difficult to the characteristics of being driven directly.This hair simultaneously
It is bright that airtightness vacation rock core 205 is provided in core holding unit, it can be long by adjusting false rock core 205 and saturated oils rock core 207
The method of degree investigates crude oil scale to CO to simulate the crude oil that streams of different scale and scale2Crude oil effect improves recovery ratio
Influence, and it is conventional handle up the not set vacation rock core of experimental provision or false rock core is non-airtightness, crude oil is easy under high pressure
It flows to the left, causes biggish recovery ratio deviation.
1)CO2The not set CO of experimental provision of handling up2Crude oil contacts chamber 213, it is difficult to guarantee CO2Crude oil comes into full contact with；
2) core holding unit lacks the buffering of contact chamber, high pressure CO2Easily enter rock core end, end crude oil is formed and is driven
It replaces, influences CO2Oil recovery factor result is streamed in the raising of crude oil mass transfer.
3)CO2The not set airtightness vacation rock core 205 of experimental provision of handling up or the false rock core for non-airtightness, crude oil is in height
Pressure is easily flowed to the left, causes biggish oil recovery factor deviation.
4) cooperation by 207 length of airtightness vacation rock core 205 and saturated oils rock core is not considered, adjusts and simulates different rulers
The problem of very little and scale streams crude oil.
Summary of the invention
The present invention in view of the drawbacks of the prior art, provides a kind of based on CO2The raising of crude oil effect of mass transmitting is streamed crude oil and is adopted
The experimental provision and method of yield, can effectively solve the above-mentioned problems of the prior art.
In order to realize the above goal of the invention, the technical solution adopted by the present invention is as follows:
One kind being based on CO2Crude oil effect of mass transmitting improves the experimental provision for streaming oil recovery factor, including core holding unit
200, No.1 pressure gauge 2, No.1 valve 3, No.1 metering pump 4, two valve 5, two pressure gauge 6, insulating box 7；High-pressure bottle
8, constant speed and constant pressure pumps 9, No. two valve 11, three of metering pump 10, three pressure gauges 12, back-pressure valve 13 and gs-oil separator 14.
The core holding unit 200 is used to coat the rock core of saturated oils, and simulation is streamed the occurrence status of crude oil, provided simultaneously
CO2With the high temperature and high pressure environment of crude oil effect of mass transmitting；Core holding unit 200 passes through No.1 pressure gauge 2 and No.1 valve 3 and one
Number metering pump 4 is connected, and No.1 metering pump 4 is used to apply confining pressure to core holding unit 200, realizes the cladding to rock core.
The core holding unit 200 passes through No. two pressure gauges 6 and No. two valves 5 and high-pressure bottle 8 and constant speed and constant pressure pump 9
It is connected, pumps 9 for CO by constant speed and constant pressure in experiment2It injects in the contact chamber 213 of core holding unit 200.
The core holding unit 200 is connected with back-pressure valve 13 and gs-oil separator 14, and back-pressure valve 13 is for controlling rock core folder
Pressure in holder 200, gs-oil separator 14 measure extraction oil volume for realizing the Oil-gas Separation after decompression.
The back-pressure valve is connected by No. three pressure gauges 12 and No. three valves 11 with No. two 10 pumps of metering, No. two metering pumps 10
For applying back pressure.
The insulating box 7 is used to experimental provision being heated to set temperature, and place inside it core holding unit 200,
High-pressure bottle 8 and back-pressure valve 13.
Further, the core holding unit 200 includes: that No.1 entrance 201, No.1 rock core plug 202, No.1 confining pressure are stifled
First 203,208, No. two confining pressure chamber 204, airtightness vacation rock core 205, rubber tube 206, saturated oils rock core 207, pressure cabin confining pressures
The rock core plug 210, two of plug 209, two entrance 211, outlet 212 and contact chamber 213；
The No.1 entrance 201 is directly arranged in No.1 rock core plug 202, is opened during initial rock core is saturated crude oil
It opens, improves in recovery ratio experiment in effect of mass transmitting and be in close state always；
The No.1 rock core plug 202 is connect by screw thread with No.1 confining pressure plug 203, for holding out against rock upwards in core axis
The heart；
The No.1 confining pressure plug 203 is connected with pressure cabin 208 and No.1 rock core plug 202 respectively by screw thread, is used for
Closed confining pressure chamber 204 is formed together with pressure cabin 208, rubber tube 206 and No. two confining pressure plugs 209；
The confining pressure cabin 204 is by 203, No. two confining pressure plugs 209 of No.1 confining pressure plug, pressure cabin 208 and rubber tube
206 is common around formation；Water can be injected in confining pressure cabin 204, forms high pressure, for applying cladding pressure to rubber tube 206, made
206 202, No. two rock core plugs 210 of tight No.1 rock core plug of rubber tube, closed false rock core 205 and saturated oils rock core 207；
The airtightness vacation rock core 205 is placed directly in rubber tube 206, in rock core plug 202 and saturated oils rock core 207
Between, length is adjustable, adjusts 207 length of saturated oils rock core for cooperating, simulates the crude oil that streams of different scales, while preventing original
Oil is migrated to the left；
The rubber tube 206, both ends are respectively coated by No.1 confining pressure plug 203 and No. two confining pressure plugs 209, while
To the No.1 rock core plug 202, airtightness vacation rock core 205, saturated oils rock core 207, two being placed in rubber tube 206 under confining pressure effect
Number rock core plug 210 forms package, provides the hyperbaric environment of airtightness, prevents injection fluid from streaming rock core is axial；
207 length of saturated oils rock core is adjustable, is placed directly in rubber tube 206, left side and airtightness vacation rock core 205
Connect, right side connects with rock core plug 210 and contact chamber 213, streams crude oil for simulating；
The pressure cabin 208, both ends by screw thread respectively with No.1 confining pressure plug 203 and No. two 209 phases of confining pressure plug
It connects, cooperates rubber tube 206, form confining pressure chamber 204, for applying confining pressure, form hyperbaric environment；
No. two confining pressure plugs 209 are connected respectively with No. two rock core plugs 210 and pressure cabin 208 by screw thread, are used for
Closed confining pressure chamber 204 is formed together with pressure cabin 208, rubber tube 206 and No.1 confining pressure plug 203；
No. two rock core plugs 210 are connect, for holding out against upwards in core axis with No. two confining pressure plugs 209 by screw thread
Rock core；
No. two entrances 211 are directly arranged on No. two rock core plugs 210, for injecting high pressure CO2；
The outlet 212 is directly arranged on No. two rock core plugs 210, is used for high pressure CO2With the extraction of crude oil；
The contact chamber 213, shape be circular groove shape, be directly arranged on No. two rock core plugs 210, top with No. two
Entrance 211 communicates, and lower part is communicated with outlet 212, for realizing high pressure CO2Face contact, mass transfer with crude oil.
Further, the 213 diameter 2.3cm of contact chamber, depth 0.3cm.
Further, the saturated oils rock core 207, diameter 2.5cm.
A kind of experimental method based on above-mentioned experimental provision, includes the following steps:
S1, insulating box 7 is opened, experimental temperature is arrived in setting；
S2, saturated oils rock core 207 is placed in core holding unit 200, the saturated oils rock core 207 passes through conventional displacement
Oily expelling water method in device is made；
S3, airtightness vacation rock core 205 is placed according to 207 length of saturated oils rock core, tightens 200 both ends No.1 of core holding unit
Rock core plug 202 and No. two rock core plugs 210, wherein right side is the rock core plug 210 with contact chamber 213；
S4, No.1 valve 3 is opened, confining pressure is applied to the confining pressure chamber 204 of clamper by No.1 metering pump 4, and protect always
Confining pressure is held higher than clamper internal pressure 2.0MPa, to realize rubber tube 206 to No.1 rock core plug 202, airtightness vacation rock core
205, the package of 207, No. two rock core plugs 210 of saturated oils rock core；
S5, No. three valves 11 are opened, is forced into experimental pressure, saturated oils rock core to back-pressure valve 13 by No. two metering pumps 10
207 and contact chamber 213 in CO2When pressure is lower than the back pressure, CO2It will not be produced from outlet with crude oil；
S6, it is allowed to be higher than CO by the application of No.1 metering pump 4 confining pressure2Pressure 2.0MPa, the CO2Pressure is by No. two pressure
Table 6 detects, and opens No. two valves 5 simultaneously, makes CO2It is contacted in into the contact chamber 213 of clamper with saturated oils rock core 207；
S7, CO is gradually given by constant speed and constant pressure pump 92Experimental pressure is boosted to, while by No.1 metering pump 4, keeping enclosing
Pressure is consistently higher than CO2Pressure about 2.0MPa；
S8、CO2When pressure reaches experimental pressure, stop boosting, at this time saturated oils rock core 207 and CO in contact chamber 2132Pressure
Power is equal to back pressure, will not by chance produce；
S9, it keeps high temperature, condition of high voltage to impregnate certain time, makes CO2It is come into full contact with crude oil, mass transfer, realizes CO2Xiang Yuan
Dissolution, expansion in oil and the extraction to crude oil；
S10, it impregnates after a certain period of time, using constant speed and constant pressure pump 9, constant speed injects CO2, make CO2With crude oil gradually from outlet
212 extraction, and separated in gs-oil separator 14, up to no crude oil continues to flow out；
S11, stop CO2Injection keeps high temperature, condition of high voltage, continues to impregnate；
S12, extraction crude oil identical as step S10 scheme；
S13, S11 and S12 are repeated, up to no crude oil produces, according to extraction crude oil volume in separator 14, calculating
CO2Oil recovery factor amplitude is streamed in the raising of crude oil mass transfer.
Compared with prior art the present invention has the advantages that in terms of 1. experiment flows, high pressure CO2It is injected from No. two entrances,
It is produced from outlet, direct driving will not be formed to crude oil, CO can only be passed through2The extraction of crude oil effect of mass transmitting；2. on the clamper right side
End is provided with contact chamber, can guarantee CO2Crude oil come into full contact with and mass transfer, while to high pressure CO2Buffering is formed, is avoided pair
Rock core end crude oil directly drives；3. it is provided with airtightness vacation rock core in the centre of clamper, it can be by adjusting described closed
Property vacation rock core and practical saturated oils core model length, the scale and scale of crude oil are streamed in simulation, while preventing crude oil in height
Pressure is migrated to the left, causes recovery ratio error.The suitable of oil recovery factor is streamed for studying CO2- crude oil effect of mass transmitting and improving
Ying Xing, best method of gas injection and condition etc.；The research that oil recovery factor is streamed in raising is offered reference；Oil recovery factor is streamed in raising
Technical thought, i.e., oil recovery factor is streamed by the effect of mass transmitting raising of CO2 and crude oil, is not limited solely to conventional air-breathing and cuts open
Face adjustment.
Detailed description of the invention
Fig. 1 is experimental provision of embodiment of the present invention structural schematic diagram；
Fig. 2 is the structural schematic diagram of core holding unit of the embodiment of the present invention.
Description of symbols
2, No.1 pressure gauge；3, No.1 valve；4, No.1 metering pump；5, No. two valves；
6, No. two pressure gauges；7, insulating box；8, high-pressure bottle；9, constant speed and constant pressure pumps；
10, No. two metering pumps；11, No. three valves；12, No. three pressure gauges；13, back-pressure valve；
14, gs-oil separator；200, core holding unit；201, No.1 entrance；
202, No.1 rock core plug；203, No.1 confining pressure plug；204, confining pressure chamber；
205, airtightness vacation rock core；206, rubber tube；207, saturated oils rock core；
208, pressure cabin；209, No. two confining pressure plugs；210, No. two rock core plugs；
211, No. two entrances；212, it exports；213, chamber is contacted.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, right hereinafter, referring to the drawings and the embodiments,
The present invention is described in further details.
As shown in Figure 1, a kind of be based on CO2Crude oil effect of mass transmitting improves the experimental provision for streaming oil recovery factor, main to wrap
Improved core holding unit 200 is included, for coating the rock core of saturated oils, simulation is streamed the occurrence status of crude oil, provided simultaneously
CO2With the high temperature and high pressure environment of crude oil effect of mass transmitting, experimental provision further include: No.1 pressure gauge 2, No.1 valve 3, No.1 metering
Pump 4, No. two valves 5, No. two pressure gauges 6, insulating boxs 7；High-pressure bottle 8, constant speed and constant pressure pump 9, No. two metering pumps, 10, No. three valves
11, No. three pressure gauges 12, back-pressure valve 13 and gs-oil separator 14.
The core holding unit 200 is connected by No.1 pressure gauge 2 and No.1 valve 3 with No.1 metering pump 4, No.1 metering
Pump 4 realizes the cladding to rock core for applying confining pressure to core holding unit 200.
The core holding unit 200 passes through No. two pressure gauges 6 and No. two valves 5 and high-pressure bottle 8 and constant speed and constant pressure pump 9
It is connected, is injected CO2 by constant speed and constant pressure pump 9 in experiment in the contact chamber 213 of core holding unit 200.
The core holding unit 200 is connected with back-pressure valve 13 and gs-oil separator 14, and back-pressure valve 13 is for controlling rock core folder
Pressure in holder 200, gs-oil separator 14 measure extraction oil volume for realizing the Oil-gas Separation after decompression.
The back-pressure valve is connected by No. three pressure gauges 12 and No. three valves 11 with No. two 10 pumps of metering, No. two metering pumps 10
For applying back pressure.
The insulating box 7 is used to experimental provision being heated to set temperature, and place inside it core holding unit 200,
High-pressure bottle 8 and back-pressure valve 13.
As shown in Fig. 2, the core holding unit 200 includes: that No.1 entrance 201, No.1 rock core plug 202, No.1 confining pressure are stifled
First 203,208, No. two confining pressure chamber 204, airtightness vacation rock core 205, rubber tube 206, saturated oils rock core 207, pressure cabin confining pressures
The rock core plug 210, two of plug 209, two entrance 211, outlet 212 and contact chamber 213；
The No.1 entrance 201 is directly arranged in No.1 rock core plug 202, is opened during initial rock core is saturated crude oil
It opens, improves in recovery ratio experiment in effect of mass transmitting and be in close state always；
The No.1 rock core plug 202 is connect by screw thread with No.1 confining pressure plug 203, for holding out against rock upwards in core axis
The heart；
The No.1 confining pressure plug 203 is connected with pressure cabin 208 and No.1 rock core plug 202 respectively by screw thread, is used for
Closed confining pressure chamber 204 is formed together with pressure cabin 208, rubber tube 206 and No. two confining pressure plugs 209；
The confining pressure cabin 204 is by 203, No. two confining pressure plugs 209 of No.1 confining pressure plug, pressure cabin 208 and rubber tube
206 is common around formation；Water can be injected in confining pressure cabin 204, forms high pressure, for applying cladding pressure to rubber tube 206, made
206 202, No. two rock core plugs 210 of tight No.1 rock core plug of rubber tube, closed false rock core 205 and saturated oils rock core 207；
The airtightness vacation rock core 205 is placed directly in rubber tube 206, in rock core plug 202 and saturated oils rock core 207
Between, length is adjustable in 0-30cm, adjusts 207 length of saturated oils rock core for cooperating, simulates the crude oil that streams of different scales, together
When prevent crude oil from migrating to the left；
The rubber tube 206, both ends are respectively coated by No.1 confining pressure plug 203 and No. two confining pressure plugs 209, while
To the No.1 rock core plug 202, airtightness vacation rock core 205, saturated oils rock core 207, two being placed in rubber tube 206 under confining pressure effect
Number rock core plug 210 forms package, provides the hyperbaric environment of airtightness, prevents injection fluid from streaming rock core is axial；
The saturated oils rock core 207, diameter 2.5cm, length 0-30cm is adjustable, is placed directly in rubber tube 206, left side
Connect with airtightness vacation rock core 205, right side connects with rock core plug 210 and contact chamber 213, streams crude oil for simulating；
The pressure cabin 208, both ends by screw thread respectively with No.1 confining pressure plug 203 and No. two 209 phases of confining pressure plug
It connects, cooperates rubber tube 206, form confining pressure chamber 204, for applying confining pressure, form hyperbaric environment；
No. two confining pressure plugs 209 are connected respectively with No. two rock core plugs 210 and pressure cabin 208 by screw thread, are used for
Closed confining pressure chamber 204 is formed together with pressure cabin 208, rubber tube 206 and No.1 confining pressure plug 203；
No. two rock core plugs 210 are connect, for holding out against upwards in core axis with No. two confining pressure plugs 209 by screw thread
Rock core；
No. two entrances 211 are directly arranged on No. two rock core plugs 210, for injecting high pressure CO2；
The outlet 212 is directly arranged on No. two rock core plugs 210, is used for high pressure CO2With the extraction of crude oil；
The contact chamber 213, shape are the circular groove shape of diameter 2.3cm, depth 0.3cm, are directly arranged at No. two rocks
On heart plug 210, top is communicated with No. two entrances 211, and lower part is communicated with outlet 212, for realizing high pressure CO2It is connect with the face of crude oil
Touching, mass transfer.
A kind of experimental method based on above-mentioned experimental provision, includes the following steps:
S1, insulating box 7 is opened, experimental temperature is arrived in setting；
S2, saturated oils rock core 207 is placed in core holding unit 200, the saturated oils rock core 207 passes through conventional displacement
Oily expelling water method in device is made；
S3, airtightness vacation rock core 205 is placed according to 207 length of saturated oils rock core, tightens 200 both ends No.1 of core holding unit
Rock core plug 202 and No. two rock core plugs 210, wherein right side is the rock core plug 210 with contact chamber 213；
S4, No.1 valve 3 is opened, confining pressure is applied to the confining pressure chamber 204 of clamper by No.1 metering pump 4, and protect always
Confining pressure is held higher than clamper internal pressure 2.0MPa, to realize rubber tube 206 to No.1 rock core plug 202, airtightness vacation rock core
205, the package of 207, No. two rock core plugs 210 of saturated oils rock core；
S5, No. three valves 11 are opened, is forced into experimental pressure, saturated oils rock core to back-pressure valve 13 by No. two metering pumps 10
207 and contact chamber 213 in CO2When pressure is lower than the back pressure, CO2It will not be produced from outlet with crude oil；
S6, it is allowed to be higher than CO by the application of No.1 metering pump 4 confining pressure2Pressure 2.0MPa, the CO2Pressure is No. two pressure
Meter pressure 6, and No. two valves 5 are opened simultaneously, make CO2It is contacted in into the contact chamber 213 of clamper with saturated oils rock core 207；
S7, CO is gradually given by constant speed and constant pressure pump 92Experimental pressure is boosted to, while by No.1 metering pump 4, keeping enclosing
Pressure is consistently higher than CO2Pressure about 2.0MPa；
S8、CO2When pressure reaches experimental pressure, stop boosting, at this time saturated oils rock core 207 and CO in contact chamber 2132Pressure
Power is equal to back pressure, will not by chance produce；
S9, it keeps high temperature, condition of high voltage to impregnate certain time, makes CO2It is come into full contact with crude oil, mass transfer, realizes CO2Xiang Yuan
Dissolution, expansion in oil and the extraction to crude oil；
S10, it impregnates after a certain period of time, using constant speed and constant pressure pump 9, constant speed injects CO2, make CO2With crude oil gradually from outlet
212 extraction, and separated in gs-oil separator 14, up to no crude oil continues to flow out；
S11, stop CO2Injection keeps high temperature, condition of high voltage, continues to impregnate；
S12, extraction crude oil identical as step S10 scheme；
S13, S11 and S12 are repeated, up to no crude oil produces, according to extraction crude oil volume in separator 14, calculating
CO2Oil recovery factor amplitude is streamed in the raising of crude oil mass transfer.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright implementation method, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.Ability
The those of ordinary skill in domain disclosed the technical disclosures can make its various for not departing from essence of the invention according to the present invention
Its various specific variations and combinations, these variations and combinations are still within the scope of the present invention.
Claims (4)
1. one kind is based on CO2Crude oil effect of mass transmitting improves the experimental provision for streaming oil recovery factor, characterized by comprising: rock core
Clamper (200), No.1 pressure gauge (2), No.1 valve (3), No.1 metering pump (4), No. two valves (5), No. two pressure gauges
(6), insulating box (7)；High-pressure bottle (8), constant speed and constant pressure pump (9), No. two metering pumps (10), No. three valves (11), No. three pressure
Table (12), back-pressure valve (13) and gs-oil separator (14)；
The core holding unit (200) is used to coat the rock core of saturated oils, and the occurrence status of crude oil is streamed in simulation, while providing CO2
With the high temperature and high pressure environment of crude oil effect of mass transmitting；Core holding unit (200) by No.1 pressure gauge (2) and No.1 valve (3) and
No.1 metering pump (4) is connected, and No.1 metering pump (4) is used to apply confining pressure to core holding unit (200), realizes the packet to rock core
It covers；
The core holding unit (200) passes through No. two pressure gauges (6) and No. two valves (5) and high-pressure bottle (8) and constant speed and constant pressure
It pumps (9) to be connected, (9) is pumped for CO by constant speed and constant pressure in experiment2It injects in the contact chamber (213) of core holding unit (200)；
The core holding unit (200) is connected with back-pressure valve (13) and gs-oil separator (14), and back-pressure valve (13) is for controlling rock
Heart clamp holder (200) interior pressure, gs-oil separator (14) measure extraction oil body for realizing the Oil-gas Separation after decompression
Product；
The back-pressure valve is connected by No. three pressure gauges (12) and No. three valves (11) with No. two metering (10) pumps, No. two metering pumps
(10) for applying back pressure；
The insulating box (7) is used to experimental provision being heated to set temperature, and place inside it core holding unit (200),
High-pressure bottle (8) and back-pressure valve (13)；
The core holding unit (200) include: No.1 entrance (201), No.1 rock core plug (202), No.1 confining pressure plug (203),
Confining pressure chamber (204), airtightness vacation rock core (205), rubber tube (206), saturated oils rock core (207), pressure cabin (208), No. two
Confining pressure plug (209), No. two rock core plugs (210), No. two entrances (211), outlet (212) and contact chamber (213)；
The No.1 entrance (201) is directly arranged in No.1 rock core plug (202), opens during initial rock core is saturated crude oil
It opens, improves in recovery ratio experiment in effect of mass transmitting and be in close state always；
The No.1 rock core plug (202) is connect by screw thread with No.1 confining pressure plug (203), for holding out against rock upwards in core axis
The heart；
The No.1 confining pressure plug (203) is connected with pressure cabin (208) and No.1 rock core plug (202) respectively by screw thread, is used
In being formed together closed confining pressure chamber (204) with pressure cabin (208), rubber tube (206) and No. two confining pressure plugs (209)；
The confining pressure cabin (204) is by No.1 confining pressure plug (203), No. two confining pressure plugs (209), pressure cabin (208) and glue
Skin cylinder (206) is jointly around formation；Water can be injected in confining pressure cabin (204), forms high pressure, for applying to rubber tube (206)
Pressure is coated, rubber tube (206) tight No.1 rock core plug (202), No. two rock core plugs (210), closed false rock core (205) are made
With saturated oils rock core (207)；
The airtightness vacation rock core (205) is placed directly in rubber tube (206), in rock core plug (202) and saturated oils rock core
(207) between, length is adjustable, adjusts saturated oils rock core (207) length for cooperating, simulates the crude oil that streams of different scales, together
When prevent crude oil from migrating to the left；
The rubber tube (206), both ends are respectively coated by No.1 confining pressure plug (203) and No. two confining pressure plugs (209), simultaneously
To the No.1 rock core plug (202), airtightness vacation rock core (205), saturation oil rock being placed in rubber tube (206) under confining pressure effect
The heart (207), No. two rock core plugs (210) form package, provide the hyperbaric environment of airtightness, prevent injection fluid in rock core axial direction
It streams；
Saturated oils rock core (207) length is adjustable, is placed directly in rubber tube (206), left side and airtightness vacation rock core
(205) connect, right side connects with rock core plug (210) and contact chamber (213), streams crude oil for simulating；
The pressure cabin (208), both ends by screw thread respectively with No.1 confining pressure plug (203) and No. two confining pressure plugs (209)
Connect, cooperate rubber tube (206), formed confining pressure chamber (204), for applying confining pressure, forms hyperbaric environment；
No. two confining pressure plugs (209) are connected with No. two rock core plugs (210) and pressure cabin (208) respectively by screw thread, are used
In being formed together closed confining pressure chamber (204) with pressure cabin (208), rubber tube (206) and No.1 confining pressure plug (203)；
No. two rock core plugs (210) are connect, for holding out against upwards in core axis with No. two confining pressure plugs (209) by screw thread
Rock core；
No. two entrances (211) are directly arranged on No. two rock core plugs (210), for injecting high pressure CO2；
The outlet (212) is directly arranged on No. two rock core plugs (210), is used for high pressure CO2With the extraction of crude oil；
The contact chamber (213), shape are circular groove shape, are directly arranged on No. two rock core plugs (210), top enters with No. two
Mouth (211) communicates, and lower part is communicated with outlet (212), for realizing high pressure CO2Face contact, mass transfer with crude oil.
2. according to claim 1 a kind of based on CO2Crude oil effect of mass transmitting improves the experimental provision for streaming oil recovery factor,
It is characterized by: contact chamber (213) the diameter 2.3cm, depth 0.3cm.
3. according to claim 1 a kind of based on CO2Crude oil effect of mass transmitting improves the experimental provision for streaming oil recovery factor,
It is characterized by: saturated oils rock core (207) diameter is 2.5cm.
4. according to claim 1 a kind of based on CO2Crude oil effect of mass transmitting improves the experimental provision for streaming oil recovery factor
Experimental method, it is characterised in that include the following steps:
S1, insulating box (7) are opened, experimental temperature is arrived in setting；
S2, saturated oils rock core (207) is placed in core holding unit (200), the saturated oils rock core (207) passes through conventional displacement
Oily expelling water method in device is made；
S3, airtightness vacation rock core (205) are placed according to saturated oils rock core (207) length, tightens core holding unit (200) both ends one
Number rock core plug (202) and No. two rock core plugs (210), wherein right side is the rock core plug (210) with contact chamber (213)；
S4, No.1 valve (3) are opened, confining pressure is applied to the confining pressure chamber (204) of clamper by No.1 metering pump (4), and always
Confining pressure is kept to be higher than clamper internal pressure 2.0MPa, to realize that rubber tube (206) is false to No.1 rock core plug (202), airtightness
Rock core (205), saturated oils rock core (207), No. two rock core plugs (210) package；
S5, No. three valves (11) are opened, is forced into experimental pressure to back-pressure valve (13) by No. two metering pumps (10), is saturated oil rock
The heart (207) and contact chamber (213) interior CO2When pressure is lower than the back pressure, CO2It will not be produced from outlet with crude oil；
S6, it is allowed to be higher than CO by No.1 metering pump (4) application confining pressure2Pressure 2.0MPa, the CO2Pressure is by No. two pressure gauges
(6) it detects, and opens No. two valves (5) simultaneously, make CO2Into clamper contact chamber (213) in saturated oils rock core (207)
Contact；
S7, CO is gradually given by constant speed and constant pressure pump (9)2Experimental pressure is boosted to, while by No.1 metering pump (4), keeping confining pressure
(2) it is consistently higher than CO2Pressure 2.0MPa；
S8、CO2When pressure reaches experimental pressure, stop boosting, at this time saturated oils rock core (207) and contact chamber (213) interior CO2Pressure
Power is equal to back pressure, will not by chance produce；
S9, it keeps high temperature, condition of high voltage to impregnate certain time, makes CO2It is come into full contact with crude oil, mass transfer, realizes CO2Into crude oil
Dissolution, expansion and the extraction to crude oil；
S10, it impregnates after a certain period of time, pumps (9) using constant speed and constant pressure, constant speed injects CO2, make CO2With crude oil gradually from outlet
(212) it produces, and the separation in gs-oil separator (14), up to no crude oil continues to flow out；
S11, stop CO2Injection keeps high temperature, condition of high voltage, continues to impregnate；
S12, extraction crude oil identical as step S10 scheme；
S13, S11 and S12 are repeated, up to no crude oil produces, according to extraction crude oil volume in separator (14), calculating CO2-
Oil recovery factor amplitude is streamed in the raising of crude oil mass transfer.
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| CN117046388B (en) * | 2023-10-12 | 2024-05-24 | 四川大学华西医院 | Device for high-pressure oxidation experiment of protein crystal |
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