CN105484713B - Experimental method and device for simulating shale gas reservoir exploitation - Google Patents
Experimental method and device for simulating shale gas reservoir exploitation Download PDFInfo
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- CN105484713B CN105484713B CN201510994130.6A CN201510994130A CN105484713B CN 105484713 B CN105484713 B CN 105484713B CN 201510994130 A CN201510994130 A CN 201510994130A CN 105484713 B CN105484713 B CN 105484713B
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- 238000002474 experimental method Methods 0.000 title claims abstract description 28
- 239000011435 rock Substances 0.000 claims abstract description 183
- 238000012360 testing method Methods 0.000 claims abstract description 121
- 239000007789 gas Substances 0.000 claims description 257
- 238000004088 simulation Methods 0.000 claims description 45
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 16
- 230000035699 permeability Effects 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000003542 behavioural effect Effects 0.000 description 13
- 238000004321 preservation Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 238000005065 mining Methods 0.000 description 6
- 239000005416 organic matter Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- 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
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides an experimental method and a device for simulating shale gas reservoir exploitation, wherein the experimental method for simulating shale gas reservoir exploitation comprises the following steps: obtaining a test core of a reservoir to be exploited; placing a test core in a core holder; applying ring pressure to the test core through the core holder; heating the test rock core; inputting adsorbable gas into the core holder; when the pressure value of the adsorbable gas in the core holder is the same as the pressure value of the gas in the test core in the reservoir to be exploited, opening the core holder to release the adsorbable gas in the test core; the method comprises the steps of obtaining first opening time of a core holder, and a first pressure value in the core holder and a first gas output quantity of the core holder corresponding to the first opening time of the core holder. The invention aims to provide the experimental method and the experimental device for simulating the exploitation of the shale gas reservoir, which can truly simulate the dynamic characteristics of the shale gas in the whole exploitation period.
Description
Technical field
The present invention relates to shale gas reservoir exploitation field more particularly to a kind of experimental methods and dress of the exploitation of simulation shale gas reservoir
It sets.
Background technology
As countries in the world are to the continuous soaring of energy demand, the development of unconventional gas reservoir is just changing the energy lattice in the world
Office and the focus exploited as the whole world.Shale gas belongs to Unconventional gas, mainly with adsorbed state preservation in rock
Grain and organic matter surface, or with free state preservation among hole and crack, it is also minimal amount of to exist with dissolved state.Page
Structure and normal gas pools are oozed in the hole of rock gas reservoir to be had dramatically different, and shale gas reservoir has special low hole, special hypotonic and there is absorption solution
It characteristics, the daily output early period tolerance so as to cause shale gas in exploitation such as inhales to successively decrease comparatively fast, ooze due to reservoir in the middle and later periods of exploitation
Saturating rate is relatively low and the effect daily output tolerance of adsorbed gas is successively decreased very slowly.Compared with conventional gas, shale gas reservoir distribution
Extensively, thickness is big and adsorbs the big feature of its content so that shale gas reservoir exploitation has the spy of production life of well length and production cycle length
Point.The behavioral characteristics of correct understanding shale gas reservoir exploitation to formulate rational recovery scheme and high-efficiency mining shale gas keep it is important
Directive significance.
It is generally used in the experimental method of ground simulation shale gas reservoir exploitation in the prior art to obtain shale gas reservoir exploitation
Behavioral characteristics；But experimental method in the prior art is when simulating shale gas reservoir exploitation, not by the pressure of shale gas reservoir reservoir
The characteristics of gas of power, temperature and shale gas reservoir exploitation, integrates consideration, to be unable to the entire of real simulation shale gas
The behavioral characteristics in the period are exploited, the inaccuracy of analog result is caused, to which rational exploitation side cannot be formulated shale gas reservoir
Case and high-efficiency mining provide directive significance.
Invention content
The object of the present invention is to provide a kind of moulds of behavioral characteristics that can be in the entire exploitation period of real simulation shale gas
The experimental method and device of quasi- shale gas reservoir exploitation.
Following technical proposal can be used to realize in the above-mentioned purpose of the present invention：A kind of experiment side of simulation shale gas reservoir exploitation
Method comprising：Obtain the testing rock core of reservoir to be exploited；The testing rock core is positioned in core holding unit；By described
Core holding unit applies the testing rock core ring pressure of the first scheduled pressure value；The testing rock core is heated, so that
The temperature of the testing rock core is identical as the temperature of testing rock core described in reservoir to be exploited；Maintain the temperature of the testing rock core
It is identical as the temperature of testing rock core described in reservoir to be exploited, adsorbable gas is inputted into the core holding unit；When described
The pressure value of adsorbable gas is identical as the pressure value of gas in testing rock core described in reservoir to be exploited in core holding unit
When, core holding unit is opened, to discharge the adsorbable gas in the testing rock core；To the adsorbable gas released
Temperature and concentration are controlled, so that the temperature and concentration of the adsorbable gas released are in predetermined range；It obtains
Take the first opening time and rock core corresponding with the first opening time of the core holding unit folder of the core holding unit
The first gas output quantity of first pressure value and the core holding unit in holder.
Preferably, into the core holding unit input can not adsorbed gas, to obtain the second of the core holding unit
Opening time and the second pressure value in core holding unit corresponding with the second opening time of the core holding unit and institute
State the second gas output quantity of core holding unit；When the first opening time is identical as the second opening time, described first is pressed
Force value is compared with the second pressure value, or, the first gas output quantity and the second gas output quantity are carried out
It compares.
Preferably, it inputs in adsorbable gas into the core holding unit in the step or the step is to described
Input can not be in adsorbed gas in core holding unit；The adsorbable gas that is inputted into the core holding unit can not adsorbed gas
Body has scheduled flow velocity.
Preferably, the adsorbable gas is methane, it is described can not adsorbed gas be one kind in helium or nitrogen.
Preferably, before the testing rock core is positioned in core holding unit by the step, further include：Choose second
Rock core；Second rock core is positioned in core holding unit；The is applied to second rock core by the core holding unit
The pressure of two scheduled pressure values；Gas is inputted into the core holding unit；When the pressure value of gas in the core holding unit
When identical as wait exploiting the pressure value of gas in testing rock core described in reservoir, stop inputting gas into the core holding unit
Body and judge the core holding unit whether gas leakage.
Preferably, the testing rock core includes multiple porositys and the different rock core of permeability.
Preferably, the testing rock core is full-hole core.
A kind of experimental provision of simulation shale gas reservoir exploitation comprising：With the first input end, the second input end and outlet
The core holding unit at end, the core holding unit is for accommodating rock core；With the first input end phase of the core holding unit
The ring press pump of connection, the ring press pump are used to apply rock core the ring pressure of predetermined pressure；Air delivery device with output end, it is described
Output end is connected with second input end；The air delivery device can input gas into the core holding unit；It is set to
The first valve between the output end and second input end；Detection piece, the detection piece for detect described second into
The pressure at mouth end；The flowmeter being connected with the outlet end；Second be set between the flowmeter and the outlet end
Valve；The explosion-protection equipment being connected with the flowmeter, the explosion-protection equipment are used to control the gas of the flowmeter outflow
Temperature and concentration；Temperature control device, the temperature control device can control the testing rock core into trip temperature；Control device, the control
Device processed is used to control first valve and the second valve based on the detection piece.
Preferably, described detection piece one end is connected with first valve, and the other end is connected with second input end
It connects.
A kind of experimental method of simulation shale gas reservoir exploitation provided by the invention and the advantageous effect of device are：The present invention is logical
Cross the ring pressure that step applies the testing rock core by core holding unit the first scheduled pressure value；Realize simulation shale gas reservoir
The purpose of the pressure of reservoir；Testing rock core is heated by step, so as to test rock in the temperature of testing rock core and reservoir
The temperature of the heart is identical；Realize the purpose of the temperature of simulation shale gas reservoir reservoir；It can by being inputted in step opposite direction testing rock core
Adsorbed gas；When the pressure of the pressure value of adsorbable gas and the gas in testing rock core in reservoir to be exploited in core holding unit
When being worth identical, core holding unit is opened, adsorbable gas is inputted to discharge the adsorbable gas in testing rock core；Due to natural gas
Main component be methane, therefore input adsorbable gases methane, can real simulation gas reservoir gas the characteristics of, realize simulation
The purpose that shale gas reservoir is really exploited controls the temperature of adsorbable gas and concentration that release by step, so that
The temperature and concentration for the adsorbable gas that must be released are in predetermined range；Realize the safety experiment for ensureing adsorbable gas
Purpose, the characteristics of gas to exploit the pressure, temperature and shale gas reservoir of shale gas reservoir reservoir integrates consideration,
So as to the behavioral characteristics in the entire exploitation period of real simulation shale gas, so as to formulate rational exploitation to shale gas reservoir
Scheme and high-efficiency mining provide directive significance；A kind of entire exploitation of energy real simulation shale gas is provided to realize the present invention
The experimental method of the simulation shale gas reservoir exploitation of behavioral characteristics in period and the purpose of device.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
A kind of flow chart of Fig. 1 present invention；
A kind of flow chart of Fig. 2 present invention；
A kind of flow chart of Fig. 3 present invention；
A kind of structural schematic diagram of Fig. 4 present invention；
The falloff curve schematic diagram exploited under the conditions of a kind of different permeabilities and gas with various of Fig. 5 present invention；
A kind of different holes of Fig. 6 present invention ooze and gas with various under the conditions of the accumulative aerogenesis curve synoptic diagram exploited；
Adsorbed gas total amount proportion schematic diagram is exploited under the conditions of a kind of different physical property of Fig. 7 present invention；
A kind of falloff curve schematic diagram of shale gas exploitation of Fig. 8 present invention；
A kind of accumulative aerogenesis curve synoptic diagram of shale gas exploitation of Fig. 9 present invention；
A kind of daily gas curve synoptic diagram of shale gas exploitation of Figure 10 present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1.The present invention provides a kind of experimental method of simulation shale gas reservoir exploitation comprising：S11：Acquisition waits for
Exploit the testing rock core of reservoir；S13：The testing rock core is positioned in core holding unit；S15：It is clamped by the rock core
Device applies the testing rock core ring pressure of the first scheduled pressure value；S17：The testing rock core is heated, so that described
The temperature of testing rock core is identical as the temperature of testing rock core described in reservoir to be exploited；S19：Maintain the temperature of the testing rock core
It is identical as the temperature of testing rock core described in reservoir to be exploited, adsorbable gas is inputted into the core holding unit；S21：When
The pressure value of the pressure value of adsorbable gas and the gas in testing rock core described in reservoir to be exploited in the core holding unit
When identical, core holding unit is opened, to discharge the adsorbable gas in the testing rock core；S23：To it is described release inhale
The temperature and concentration of attached gas are controlled, so that the temperature and concentration of the adsorbable gas released are in scheduled model
In enclosing；S25：Obtain the first opening time of the core holding unit and the first opening time with the core holding unit
The first gas output quantity of first pressure value and the core holding unit in corresponding core holding unit.
A kind of experimental method of simulation shale gas reservoir exploitation provided by the invention, passes through step S15：Pass through core holding unit
Apply the ring pressure of the first scheduled pressure value to the testing rock core；Realize the purpose of the pressure of simulation shale gas reservoir reservoir；It is logical
Cross step S17：Testing rock core is heated, so that the temperature of testing rock core is identical as the temperature of testing rock core in reservoir；It is real
The purpose of the temperature of simulation shale gas reservoir reservoir is showed；Pass through step S19：The adsorbable gas of input in opposite testing rock core；
S21：When the pressure value phase of the pressure value of adsorbable gas and the gas in reservoir to be exploited in testing rock core in core holding unit
Meanwhile core holding unit is opened, input adsorbable gas to discharge the adsorbable gas in testing rock core；Due to the master of natural gas
The characteristics of it is methane to want ingredient, therefore inputs adsorbable gases methane, the gas of energy real simulation gas reservoir, realizes simulation shale
The purpose that gas reservoir is really exploited passes through step S23：The temperature of adsorbable gas and concentration that release are controlled, so that
The temperature and concentration for the adsorbable gas that must be released are in predetermined range；Realize the safety experiment for ensureing adsorbable gas
Purpose, the characteristics of gas to exploit the pressure, temperature and shale gas reservoir of shale gas reservoir reservoir integrates consideration,
So as to the behavioral characteristics in the entire exploitation period of real simulation shale gas, so as to formulate rational exploitation to shale gas reservoir
Scheme and high-efficiency mining provide directive significance；A kind of entire exploitation of energy real simulation shale gas is provided to realize the present invention
The experimental method of the simulation shale gas reservoir exploitation of behavioral characteristics in period and the purpose of device.
As shown in Figure 1, in the present embodiment, S11：Obtain the testing rock core of reservoir to be exploited；So as to by right
The testing rock core of the reservoir to be exploited carries out simulated experiment, the behavioral characteristics in the entire exploitation period for obtaining reservoir to be exploited.
In the present embodiment, which is full-hole core, so as to the reservoir of further real simulation shale gas reservoir.
In present embodiment, the rock core of reservoir to be exploited is obtained by the way of drilling through rock core in reservoir to be exploited as test rock
The heart can ensure the porosity of the testing rock core and the porosity and permeability phase of permeability and the testing rock core of reservoir to be exploited
Together.
In the present embodiment, which includes multiple porositys and the different rock core of permeability, so as to logical
It crosses and the testing rock core with different porosity and permeability is tested, so as to obtain the porosity and permeability of rock core
To the affecting laws of shale gas reservoir exploitation, so as to more fully recognize the behavioral characteristics of shale gas reservoir exploitation.
As shown in Fig. 5,6,7, in the present embodiment, 3 kinds of testing rock cores are had chosen, respectively：Permeability is
0.0003mD, testing rock core that porosity is 2.01%, permeability 0.0011mD, testing rock core that porosity is 2.3% and
Permeability is 0.0162mD, the testing rock core that porosity is 1.85%.As shown in Figure 5, the falloff curve of three kinds of testing rock cores；
It will be appreciated from fig. 6 that the cumulative gas curve of three kinds of testing rock cores.These curves are to formulating rational recovery scheme and efficiently opening
Directive significance can be provided by adopting.
S13：Testing rock core is positioned in core holding unit 11, so as to accommodate the survey by the core holding unit 11
Rock core is tried, so as to apply pressure and input gas to testing rock core.In step S13：Testing rock core is positioned over rock core clamping
Before in device 11, the leakproofness for checking the core holding unit 11 is needed, to ensure that the gas inputted to testing rock core will not be revealed,
To ensure the accuracy of analog result.
As shown in Fig. 2, in the present embodiment, the step of leakproofness for checking the core holding unit 11, includes：
S131：Choose the second rock core；Second rock core is for checking the rock used in the leakproofness of the core holding unit 11
The heart, so it can select the rock core drilled through from reservoir, or artificial core, such as artificial steel rock core.
S133：Second rock core is positioned in core holding unit 11；So as to use second rock core to check the rock core
The leakproofness of clamper 11.
S135：Apply the pressure of the second scheduled pressure value to the second rock core by core holding unit 11；So as to make rock core
The ring pressure seal ring of clamper 11 comes into full contact with the second rock core, ensures the leakproofness of the second rock core.Second scheduled pressure value
It refer to the pressure that the ring pressure seal ring of core holding unit 11 can be made to come into full contact with and destroy the second rock core with the second rock core
Power.In the present embodiment, which is the power for increasing 10MPa on the basis of the first scheduled pressure value.
S137：Gas is inputted into core holding unit 11；So as to check the effect of 11 sealing gas of core holding unit.
S139：When the pressure of the pressure value of gas and the gas in testing rock core in reservoir to be exploited in core holding unit 11
When being worth identical, stop into core holding unit input gas and judge core holding unit whether gas leakage；To simulation test rock core
The case where interior input gas, to ensure when testing rock core be put into core holding unit 11 input and reservoir to be exploited in test rock
The leakproofness when gas of the identical pressure value of pressure value of intracardiac gas.When 11 gas leakage of core holding unit, need to overhaul
Core holding unit 11 is until the no longer gas leakage of core holding unit 11.
S15：Apply the ring pressure of the first scheduled pressure value to testing rock core by core holding unit 11；To on the one hand make
Ring pressure seal ring and the testing rock core of core holding unit 11 come into full contact with, and ensure the leakproofness of testing rock core；It on the other hand can mould
Quasi- testing rock core ring pressure suffered in reservoir to be developed, so as to the reservoir of real simulation shale gas reservoir.This is first predetermined
Pressure value refers to that the ring pressure seal ring of core holding unit 11 can be made to come into full contact with and destroy testing rock core with testing rock core
Pressure.In the present embodiment, which is the pressure of the gas in reservoir to be exploited in testing rock core
Increase the power of 5MPa on the basis of value.
S17：Testing rock core is heated, so that the temperature of the temperature of testing rock core and testing rock core in reservoir to be exploited
It is identical；So as to realize that the purpose for the temperature for simulating shale gas reservoir reservoir, the temperature of rock core have a significant impact to the exploitation of gas reservoir,
To the temperature by simulation core in reservoir, the purpose of real simulation Gas Reservoir is realized, so as to obtain accurate page
The behavioral characteristics of rock gas reservoir exploitation.The temperature of testing rock core is being waited for by temperature monitor before test mining in reservoir to be exploited
Measurement acquires in exploitation reservoir.
S19：Maintain the temperature of testing rock core identical as the temperature of testing rock core in reservoir to be exploited, into core holding unit
Input adsorbable gas；Shale gas is stored in reservoir to simulate.Suction-operated due to rock to adsorbable gas so that
Adsorbable gas in rock can a part with adsorbed state preservation in rock particles and organic matter surface, to different from trip
From state preservation among hole and crack, or with can not rule of the adsorbed gas in recovery process existing for dissolved state.
In the present embodiment, which is methane, because the adsorbable gas in actual reservoir is methane, so as to logical
Crossing experiment obtains rock to the suction-operated of adsorbable gas to the dynamic affecting laws of gas-field exploitation.In the present embodiment,
The gas inputted into the core holding unit has scheduled flow velocity.To which under the scheduled flow velocity, gas can enter test
In the hole of rock core, so as to simulate in reservoir shale gas with adsorbed state preservation in rock particles and organic matter surface, or with
Free state preservation among hole and crack, or with dissolved state there are the case where.
S21：When the pressure value of adsorbable gas in core holding unit and the gas in testing rock core in reservoir to be exploited
When pressure value is identical, core holding unit is opened, to discharge the adsorbable gas in testing rock core；When adsorbable in core holding unit
When the pressure value of gas is identical as wait exploiting the pressure value of gas in reservoir in testing rock core, adsorbable gas in testing rock core
Content it is identical as the content of the gas in reservoir in testing rock core, so as to the air content in real simulation reservoir.By beating
Core holding unit is opened, the adsorbable gas in testing rock core is discharged；The process of shale gas reservoir exploitation can be simulated.To obtain
Behavioral characteristics in the entire exploitation period of shale gas.
S23：The temperature of adsorbable gas and concentration that release are controlled, so that the adsorbable gas released
Temperature and concentration in predetermined range；Because adsorbable gas is inflammable in the environment of high temperature and pressure, so that experiment
Failure, so in order to simulate the adsorbable gas safely, needs to control the temperature and concentration of the adsorbable gas, so that
The temperature and concentration for the adsorbable gas that must be released are in predetermined range.The scheduled ranging from adsorbable gas will not be sent out
The range of raw burning.
S25：Obtain opening time and rock core corresponding with the opening time of the core holding unit clamping of core holding unit
The gas output of pressure value and core holding unit in device.
As shown in Figure 8, it is known that the pressure drop of the opening time of core holding unit and the pressure value in corresponding core holding unit
Feature；As shown in Figure 9, it is known that the feature between the opening time of core holding unit and the gas output of core holding unit；Such as
Shown in Figure 10, it is known that the feature between the opening time of core holding unit and the daily output tolerance of core holding unit.To by such as
The recovery features of gas well shown in Fig. 8,9,10 can provide directive significance for the selection of gas reservoir exploitation equipment, such as can be according to daily output
The indicatrix of tolerance and opening time choose the size of the air pump of suitable exploitation gas well, so as to efficiently exploit gas
Well.
As shown in figure 3, in the present embodiment, the present invention provides a kind of experimental method of simulation shale gas reservoir exploitation, also
Including：
S27：Into core holding unit input can not adsorbed gas, with obtain core holding unit the second opening time, with
And second of the second pressure value and core holding unit in core holding unit corresponding with the second opening time of core holding unit
Gas output；Due to rock to can not adsorbed gas desorption so that in rock can not adsorbed gas can be with free
There is a part among hole and crack, or with dissolved state to be different from adsorbed state preservation in rock in state preservation
The rule of particle and the adsorbable gas on organic matter surface in recovery process.In the present embodiment, this can not adsorbed gas
For nitrogen either helium because in actual reservoir can not adsorbed gas be nitrogen or helium, so as to by testing
Go out rock to can not adsorbed gas desorption to the dynamic affecting laws of gas-field exploitation.In the present embodiment, to the rock
Input in heart clamp holder can not adsorbed gas there is scheduled flow velocity.Thus under the scheduled flow velocity, it can not adsorbed gas
It can enter in the hole of testing rock core, so as to simulate in reservoir shale gas with free state preservation among hole and crack,
Or with dissolved state there are the case where.
S29：When the first opening time is identical as the second opening time, first pressure value and second pressure value are compared
It is right, or, first gas output quantity is compared with second gas output quantity.
In the present embodiment, by comparing the pressure for inputting adsorbable gas in testing rock core and can not be after adsorbed gas
The comparison of force value and gas output, can obtain the adsorption-desorption effect of rock dynamically influences gas reservoir exploitation, so as to
The more fully behavioral characteristics of understanding shale gas reservoir exploitation.Adsorbable gas exploits the simulation the result is that practical shale gas exploitation,
And the comparison of the two can specify affecting laws of the adsorbed gas to practical shale gas exploitation, therefore can be the volume of actual development scheme
System, the prediction of Production development and raising recovery ratio provide support.As shown in Figure 5, the falloff curve of two kinds of gas；It can by Fig. 6
Know, the cumulative gas curve of two kinds of gases；As shown in Figure 7, the adsorbed gas total amount proportion of three kinds of testing rock cores is bent
Line.These curves can provide directive significance to formulating rational recovery scheme and high-efficiency mining.
As shown, in the present embodiment, a kind of experimental provision packet of simulation shale gas reservoir exploitation provided by the invention
It includes：Core holding unit 11 with the first input end 13, the second input end 15 and outlet end 17, core holding unit 11 is for accommodating
Rock core；The ring press pump 27 being connected with the first input end 13 of core holding unit 11, ring press pump 27 are used to apply rock core predetermined
The ring pressure of pressure；Air delivery device with output end 25, the output end 25 are connected with the second input end 15；The air delivery device energy
Gas is inputted into core holding unit 11；The first valve 19 being set between output end 25 and the second input end 15；Detection piece
29, detection piece 29 is used to detect the pressure of the second input end 15；The flowmeter 31 being connected with outlet end 17；It is set to flowmeter
The second valve 33 between 31 and outlet end 17；Temperature control device 35, temperature control device 35 can control testing rock core into trip temperature, control
Device 43 processed, control device 43 are used to control the first valve 19 and the second valve 33 based on detection piece.
As shown in figure 4, in the present embodiment, the rock with the first input end 13, the second input end 15 and outlet end 17
Heart clamp holder 11, the core holding unit 11 is for accommodating rock core；First input end 13 is used for rock core or carries out plus ring pressure, should
Second input end 15 is used to input gas to rock core, which releases when being completed for sealing rock core when inputting gas and input
Put the gas in rock core.
The ring press pump 27 being connected with the first input end 13 of core holding unit 11, ring press pump 27 can apply ring to rock core
Pressure；To on the one hand the ring pressure seal ring of core holding unit 11 be made to be come into full contact with rock core, ensure the leakproofness of rock core；It is another
Aspect energy simulation core ring pressure suffered in reservoir to be developed, so as to the reservoir of real simulation shale gas reservoir.The ring pressure
Pump 27 has and to the first working condition that core holding unit 11 pressurizes and core holding unit 11 can be maintained to be in pre- level pressure
Second working condition of force environment.The predetermined pressure environment refers to testing rock core by the ring pressure of the first predetermined pressure or the second rock
The heart by the second predetermined pressure ring pressure.
Air delivery device with output end 25, the output end 25 are connected with the second input end 15；The air delivery device can be to
Input gas in rock core is until the pressure value of gas is identical as the pressure of the gas in reservoir in testing rock core in rock core, to gas
Physical efficiency enters in the hole of testing rock core, so as to simulate in reservoir shale gas with adsorbed state preservation in rock particles and organic
Matter surface, or with free state preservation among hole and crack, or with dissolved state there are the case where.The air delivery device includes
Intermediate receptacle 21 with output end 25 and the actuating unit 23 being connected with the intermediate receptacle 21.The actuating unit 23 is used for will
High-pressure air source is transported in intermediate receptacle 21, and the intermediate receptacle 21 is for high-pressure air source to be transported in core holding unit 11.
The first valve 19 is provided between the output end 25 and the second input end 15, to when the second input terminal of core holding unit 11
When pressure is identical as the pressure of the gas in reservoir in testing rock core, it can be stopped to test rock by closing first valve 19
Intracardiac input gas.
Detection piece 29, the detection piece 29 are used to detect the pressure of the second input end 15；To when the of core holding unit 11
When the pressure of two input terminals is identical as the pressure of the gas in reservoir in testing rock core, it can be detected by the detection piece 29.
In the present embodiment, which is pressure sensor.The pressure sensor one end is connected with container, the other end and
Two input ends 15 are connected, to which the pressure sensor can detect the pressure of second input end 15.
The flowmeter 31 being connected with outlet end 17；The flowmeter 31, which can be measured, to be released by the outlet end 17
Gas.The second valve 33 being set between flowmeter 31 and outlet end 17；So as to by closing second valve 33, beat
It opens the first valve 19 and inputs gas into testing rock core up to testing rock core in the first pressure of gas in testing rock core and reservoir
The pressure of interior gas is identical.
The explosion-protection equipment being connected with flowmeter, the explosion-protection equipment are used to control the temperature of gas of flowmeter outflow and dense
Degree；So as to prevent gas from exploding.
Temperature control device 35, the temperature control device 35 can be to testing rock cores into trip temperature, so that the temperature and reservoir of testing rock core
The temperature of middle testing rock core is identical；So as to realize the purpose for the temperature for simulating shale gas reservoir reservoir.In the present embodiment, should
Temperature control device 35 is insulating box.
Control device 43, control device 43 are used to control the first valve 19 and the second valve 33 based on detection piece 29.
In the present embodiment, the second valve 33 can be closed by control device 43, opens the first valve 19 so that high
Pressurized air source is transported in intermediate receptacle 21, and using intermediate receptacle 21, the gas in the high-pressure air source is transported to rock core folder
In holder 11；Until the first pressure of gas is identical as the pressure of the gas in reservoir in testing rock core in testing rock core, close
First valve 19；It realizes and inputs gas into core holding unit；
In the present embodiment, the first valve 19 can be closed by control device 43, opens the release of the second valve 33 and surveys
Try the gas in rock core；And it obtains the gas output of core holding unit by flowmeter 31 and is obtained by detection piece 29 and discharge
In gas process, the pressure value in core holding unit.
In the present embodiment, which is computer.
As shown in figure 4, in the present embodiment, a kind of experimental provision of simulation shale gas reservoir exploitation provided by the invention is also
Including：The drier 37 being set between the second valve 33 and flowmeter 31 will be from outlet so as to by the drier 37
The moisture removal contained in the gas of 17 output of end, so as to more accurately obtain the air content in testing rock core.
It these are only that several embodiments of the present invention, those skilled in the art can be right according to application documents disclosure
The embodiment of the present invention carries out various changes or modifications without departing from the spirit and scope of the present invention.
Claims (9)
1. a kind of experimental method of simulation shale gas reservoir exploitation, which is characterized in that it includes：
Obtain the testing rock core of reservoir to be exploited；
The testing rock core is positioned in core holding unit；
Apply the ring pressure of the first scheduled pressure value to the testing rock core by the core holding unit；
The testing rock core is heated, so that the temperature of the testing rock core and testing rock core described in reservoir to be exploited
Temperature is identical；
It maintains the temperature of the testing rock core identical as the temperature of testing rock core described in reservoir to be exploited, is clamped to the rock core
The adsorbable gas of input in device；
When the pressure value of adsorbable gas in the core holding unit and the gas in testing rock core described in reservoir to be exploited
When pressure value is identical, core holding unit is opened, to discharge the adsorbable gas in the testing rock core；
The temperature and concentration of the adsorbable gas released are controlled, so that the adsorbable gas released
Temperature and concentration in predetermined range；
Obtain the first opening time of the core holding unit and corresponding with the first opening time of the core holding unit
The first gas output quantity of first pressure value and the core holding unit in core holding unit.
2. the experimental method of simulation shale gas reservoir exploitation according to claim 1, it is characterised in that：It is clamped to the rock core
In device input can not adsorbed gas, with obtain the core holding unit the second opening time and with the core holding unit
The second opening time corresponding core holding unit in second pressure value and the core holding unit second gas output quantity；
When the first opening time is identical as the second opening time, the first pressure value and the second pressure value are compared
It is right, or,
The first gas output quantity is compared with the second gas output quantity.
3. the experimental method of simulation shale gas reservoir exploitation according to claim 1 or 2, it is characterised in that：In the step
Inputted into the core holding unit in adsorbable gas or the step inputted into the core holding unit it is not adsorbable
In gas；The adsorbable gas that is inputted into the core holding unit or can not adsorbed gas there is scheduled flow velocity.
4. the experimental method of simulation shale gas reservoir exploitation according to claim 3, it is characterised in that：The adsorbable gas
For methane, it is described can not adsorbed gas be one kind in helium or nitrogen.
5. the experimental method of simulation shale gas reservoir exploitation according to claim 4, it is characterised in that：In the step by institute
It states before testing rock core is positioned in core holding unit, further includes：
Choose the second rock core；
Second rock core is positioned in core holding unit；
Apply the pressure of the second scheduled pressure value to second rock core by the core holding unit；
Gas is inputted into the core holding unit；
When the pressure value of the pressure value of gas and the gas in testing rock core described in reservoir to be exploited in the core holding unit
When identical, stop into the core holding unit input gas and judge the core holding unit whether gas leakage.
6. the experimental method of simulation shale gas reservoir exploitation according to claim 5, it is characterised in that：The testing rock core packet
Include multiple porositys and the different rock core of permeability.
7. the experimental method of simulation shale gas reservoir exploitation according to claim 6, it is characterised in that：The testing rock core is
Full-hole core.
8. a kind of experimental provision of simulation shale gas reservoir exploitation, which is characterized in that it includes：
Core holding unit with the first input end, the second inlet end and an outlet end, the core holding unit is for accommodating rock core；
The ring press pump being connected with first input end of the core holding unit, the ring press pump are used to apply rock core pre-
The ring pressure of constant-pressure；
Air delivery device with output end, the output end are connected with second input end；The air delivery device can be to institute
It states and inputs gas in core holding unit；
The first valve being set between the output end and second input end；
Detection piece, the detection piece are used to detect the pressure of second input end；
The flowmeter being connected with the outlet end；
The second valve being set between the flowmeter and the outlet end；
The explosion-protection equipment being connected with the flowmeter, the explosion-protection equipment are used to control the temperature of the gas of the flowmeter outflow
Degree and concentration；
Temperature control device, the temperature control device can control the testing rock core into trip temperature；
Control device, the control device are used to control first valve and the second valve based on the detection piece.
9. the experimental provision of simulation shale gas reservoir exploitation according to claim 8, it is characterised in that：Described detection piece one end
It is connected with first valve, the other end is connected with second input end.
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| CN106997714B (en) * | 2017-03-15 | 2023-06-02 | 西南石油大学 | Fracture-cavity type carbonate rock fracture network flow device |
| CN109297771A (en) * | 2018-10-31 | 2019-02-01 | 重庆大学 | Shale gas fast desorption test device |
| CN109838218B (en) * | 2019-03-05 | 2021-03-16 | 西南石油大学 | Experimental device and method for simulating multi-section fractured horizontal gas well stuffy well post-mining |
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| CN102944666A (en) * | 2012-12-05 | 2013-02-27 | 西南石油大学 | Shale gas reservoir recovery simulation experimental device |
| CN103149118A (en) * | 2013-01-28 | 2013-06-12 | 中国石油大学(华东) | Carbonaceous shale isothermal adsorption/desorption experimental device |
| CN103983552A (en) * | 2014-05-27 | 2014-08-13 | 中国石油天然气股份有限公司 | rock core gas in-situ adsorption testing device and working method thereof |
| CN104390883A (en) * | 2014-11-10 | 2015-03-04 | 西南石油大学 | Novel adsorption and desorption experiment device and novel adsorption and desorption experiment method |
| CN104713802B (en) * | 2015-04-01 | 2018-12-04 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | A kind of shale gas reservoir gassiness weight testing method |
| CN104880381A (en) * | 2015-04-24 | 2015-09-02 | 中国石油大学(华东) | Isothermal constant-voltage experiment device and method of gas dynamic flowing-adsorbing in shale |
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