CN108254526A - Gas reservoir development simulation system and the gas reservoir development analogy method based on the system - Google Patents
Gas reservoir development simulation system and the gas reservoir development analogy method based on the system Download PDFInfo
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Abstract
The embodiment of the present application provides a kind of gas reservoir development simulation system and the gas reservoir development analogy method based on the system, the system include：Rock core fastener；Gas path device, for providing reservoir pressure for the core being positioned in the rock core fastener；Confining pressure device, for providing reservoir confining pressure for the core；The flow sensor of the gas path device tail portion is installed on, for acquiring the gas reservoir amount that the core is produced out in gas reservoir development simulation；Multiple pressure sensors, for acquiring reservoir pressure of the core under different location in being simulated in gas reservoir development.The embodiment of the present application can be realized to the pressure transmission change modeling in Complicated as reservoir development process.
Description
Technical field
This application involves Complicated as reservoir exploitation analogue technique field, more particularly, to a kind of gas reservoir development simulation system and base
In the gas reservoir development analogy method of the system.
Background technology
Complicated as reservoir due to reservoir heterogeneity it is strong the features such as, cause development difficulty big, development behavior and exploitation rule not
Easily analysis and prediction.In order to improve recovery ratio and reduce development cost, it is necessary to Complicated as reservoir exploitation is simulated, in order to
Practical gas reservoir development can be subsequently instructed according to analog result.Therefore, simulation is carried out to Complicated as reservoir exploitation to be of great significance.
During the application is realized, the inventor of the present application discovered that：At present, though laboratory simulation gas reservoir development is tested
It is so many, but rarely have for the pressure transfer process in Complicated as reservoir development process and be related to.And in Complicated as reservoir development process
Pressure transmission changes, and is of great significance for research gas reservoir development rule and reserves exploitation rule.Therefore, the gas of the prior art
It hides the force pressure that exploitation analogue technique is difficult in the practical Complicated as reservoir development process of objective reality reflection and transmits variation.
Invention content
The embodiment of the present application is designed to provide a kind of gas reservoir development simulation system and the gas reservoir development based on the system
Analogy method, to realize to the pressure transmission change modeling in Complicated as reservoir development process.
In order to achieve the above objectives, on the one hand, the embodiment of the present application provides a kind of gas reservoir development simulation system, including：
Rock core fastener；
Gas path device, for providing reservoir pressure for the core being positioned in the rock core fastener；
Confining pressure device, for providing reservoir confining pressure for the core；
The flow sensor of the gas path device tail portion is installed on, for acquiring core quilt in gas reservoir development simulation
The gas reservoir amount produced；
Multiple pressure sensors, for acquiring reservoir pressure of the core under different location in being simulated in gas reservoir development
Power.
Preferably, the gas reservoir development simulation system further includes：
Data processing equipment, the pressure for establishing different development phases according to the gas reservoir amount and the reservoir pressure are cutd open
Face, and gas reservoir pressure propagation and reservoir reserves exploitation rule are determined according to the pressure traverse.
Preferably, the multiple pressure sensor includes first pressure sensor group and second pressure sensor group；
The first pressure sensor group includes two first pressure sensors, is correspondingly arranged in the core folder respectively
The inlet end and exhaust end of holder；
The second pressure sensor group includes several second pressure sensors, the second pressure sensor sealing peace
On side wall loaded on the rock core fastener, and it is uniformly distributed along the axial direction of the rock core fastener；Each second pressure sensing
Utensil has independent rigid pressure acquisition channel, and the end of each rigid pressure acquisition channel is placed in inside the core.
Preferably, the rigid pressure acquisition channel is equipped with filter screen.
Preferably, the cavity between the rock core fastener and the core forms confining pressure chamber, and the confining pressure device passes through
It is embodied as the core to confining pressure intracavitary injection confining pressure liquid and reservoir confining pressure is provided；
The confining pressure intracavitary be equipped with seal isolation component, with realize the sealing between the core and the confining pressure liquid every
From；
Correspondingly, the seal isolation component is equipped with several through-holes, the end of each rigid pressure acquisition channel
Portion is goed deep into across corresponding through-hole inside the core, and between the contact between the rigid pressure acquisition channel and corresponding through-hole
Gap is equipped with sealing ring.
Preferably, the seal isolation component is including being suitable for the casing and be installed on described sleeve pipe two that the core passes through
The water conservancy diversion plug at end；The water conservancy diversion is equipped with pressing sleeve beyond the Great Wall, between the contact between compression sealing described sleeve pipe and the water conservancy diversion plug
Contact gap between the side wall of gap, the pressing sleeve and the rock core fastener is equipped with sealing ring.
Preferably, the press-in end section of the pressing sleeve is wedge shape.
Preferably, described sleeve pipe is flexible sleeve.
Preferably, the gas path device includes the air source, pressure gauge, the first regulating valve, the gas that are sequentially connected by pipeline
Booster pump, the second regulating valve, third regulating valve and vent valve；The rock core fastener forms second regulating valve and described
Pipeline between three regulating valves；The flow sensor is on the pipeline between the third regulating valve and the vent valve.
On the other hand, the embodiment of the present application additionally provides a kind of gas reservoir development mould based on above-mentioned gas reservoir development simulation system
Plan method, including：
Pretreated core is placed in rock core fastener, and by the rigid pressure acquisition channel of each pressure sensor
The different location being respectively implanted inside the core；
The reservoir confining pressure of the core is loaded onto by preset reservoir confining pressure threshold value by confining pressure device and is kept；
The reservoir pressure of the core is loaded onto by preset reservoir pressure threshold value by gas path device and is kept；
The reservoir pressure of the core is gradually unloaded by the gas path device, to simulate gas reservoir development process；
During the reservoir pressure is unloaded, the core is acquired in gas reservoir development simulation by flow sensor
The gas reservoir amount being produced out, and pass through multiple pressure sensors and acquire reservoir pressure of the core under different location.
Preferably, the pretreatment includes：
The selected core of drying；
Core after drying is vacuumized；
After vacuumizing core water filling pressurization so that it is described vacuumize after core reach aqueous saturation state；
Several radial holes are opened up on the core in aqueous saturation state, to accommodate the rigidity of the pressure sensor
The end of pressure acquisition channel is inserted into.
Preferably, the reservoir pressure of the core is loaded onto by preset reservoir pressure threshold value by gas path device described
And it before keeping, further includes：
Pressure-loaded is carried out to the core by gas path device, with the part water described in displacement in core, so as to make
It states core and reaches default water saturation.
By above technical solution provided by the embodiments of the present application as it can be seen that the embodiment of the present application gas reservoir development simulation system includes
Rock core fastener, for providing the gas path device of reservoir pressure for the core being positioned in rock core fastener, for being carried for core
For the confining pressure device of reservoir confining pressure；The flow sensor of gas path device tail portion is installed on, for acquiring core in gas reservoir development mould
The gas reservoir amount being produced out in plan；Multiple pressure sensors are used in gas reservoir development simulation acquire core under different location
Reservoir pressure.In use, pretreated core is placed in rock core fastener, and by the rigid pressure of each pressure sensor
Acquisition channel is respectively implanted the different location inside core；The reservoir confining pressure of core is loaded onto by preset storage by confining pressure device
Layer confining pressure threshold value is simultaneously kept；The reservoir pressure of the core is loaded onto by preset reservoir pressure threshold value by gas path device and is protected
It holds；The reservoir pressure of core is gradually unloaded by gas path device, to simulate gas reservoir development process；In the process of unloading reservoir pressure
In, core gas reservoir amount for being produced out in gas reservoir development simulation is acquired, and pass through multiple pressure sensings by flow sensor
Device acquires reservoir pressure of the core under different location, it is thus achieved that changing to the pressure transmission in Complicated as reservoir development process
Simulation.So as to employ rule for the pressure propagation of follow-up study Complicated as reservoir and reservoir and provide the condition of being conducive to, and then can be
The rational proration of follow-up gas reservoir development provides foundation.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it can also be obtained according to these attached drawings other attached drawings.In the accompanying drawings：
Fig. 1 is the system structure diagram of gas reservoir development simulation system in one embodiment of the application；
Fig. 2 is the structure sectional view of core holding unit part in gas reservoir development simulation system shown in Fig. 1；
Fig. 3 is the flow chart of the gas reservoir development analogy method based on gas reservoir development simulation system shown in Fig. 1；
Fig. 4 be the gas reservoir development analogy method based on gas reservoir development simulation system shown in Fig. 1 in rock core pressure measurement point pressure with
Time changing curve schematic diagram；
Fig. 5 is that the pressure of different moments in the gas reservoir development analogy method based on gas reservoir development simulation system shown in Fig. 1 is cutd open
Face schematic diagram.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
Technical staff's all other embodiments obtained without creative efforts should all belong to the application protection
Range.
Refering to what is shown in Fig. 1, the gas reservoir development simulation system of the application embodiment can include rock core fastener, gas circuit fills
It puts, confining pressure device, flow sensor and multiple pressure sensors.Wherein, gas path device can be used for be positioned over the core folder
Core in holder provides reservoir pressure；Confining pressure device can be used for providing reservoir confining pressure for the core；It is installed on the gas circuit
The flow sensor of device tail portion can be used for acquiring the gas reservoir amount that the core is produced out in gas reservoir development simulation；Multiple pressures
Force snesor can be used for acquiring reservoir pressure of the core under different location in gas reservoir development simulation.
In another embodiment of the application, the gas reservoir development simulation system can also include data processing equipment, be used for
The pressure traverse of different development phases is established according to the gas reservoir amount and the reservoir pressure, and is determined according to the pressure traverse
Gas reservoir pressure propagation and reservoir reserves exploitation rule.
With continued reference to shown in Fig. 1, in one embodiment of the application, the multiple pressure sensor can include the first pressure
Force snesor group and second pressure sensor group.The first pressure sensor group includes two first pressure sensors, point
It is not correspondingly arranged in the inlet end and exhaust end of the rock core fastener；It is placed in the first pressure of the inlet end of the rock core fastener
Force snesor can be used for detecting the pressure of the rock core fastener inlet end, be placed in the first of the exhaust end of the rock core fastener
Pressure sensor can be used for detecting the pressure of the rock core fastener exhaust end.If the second pressure sensor group can include
A dry second pressure sensor, the second pressure sensor are seal-installed on the side wall of the rock core fastener, and along institute
The axial direction for stating rock core fastener is uniformly distributed, and can so be conducive to simulate the core in different depth in gas reservoir development is simulated
Under reservoir pressure variation.
With reference to shown in Fig. 2, the rock core fastener includes cylinder 1 and the end cap 2 for being installed on 1 both ends of cylinder.Each
Second pressure sensor 5 has independent rigid pressure acquisition channel 6, the end merging institute of each rigid pressure acquisition channel 6
It states inside core 3, in order to detect pressure change of the 3 inside different location of core in gas reservoir development simulation process.For
Prevent that the bulk state object to come off on the core 3 or particulate matter etc. from entering rigid pressure acquisition channel 7 and may caused by channel
It blocks, it can be in the end set filter screen (being not drawn into Fig. 2) of the rigid pressure acquisition channel 6.
In one embodiment of the application, the cavity formation between the cylinder 1 of the rock core fastener and the core 3 is enclosed
Chamber is pressed, the confining pressure device is embodied as the offer of the core 3 reservoir confining pressure by injecting confining pressure liquid to the confining pressure intracavitary.At this
Apply in an embodiment, the confining pressure device can for example include confining pressure and pump, and the confining pressure liquid for example can be water or other fluid.
In one embodiment of the application, the confining pressure intracavitary be equipped with seal isolation component 4, with realize the core 3 with
Seal isolation between the confining pressure liquid, it is aqueous so as to which the core 3 destroys its to prevent the confining pressure liquid from immersing the core 3
Saturation degree, and keep the isolation between confining pressure and reservoir pressure.In an illustrative embodiments, the seal isolation component 4
It may include the casing 41 passed through suitable for the core 3 and the water conservancy diversion plug 42 for being installed on 41 both ends of described sleeve pipe；The water conservancy diversion plug 42
On pressing sleeve 43 can be installed, with compress sealing described sleeve pipe 41 and the water conservancy diversion plug 42 between contact gap, the pressing sleeve 43
Contact gap between the side wall (cylinder 1) of the rock core fastener can be equipped with sealing ring.It correspondingly, can in described sleeve pipe 41
Equipped with several through-holes, the end of each rigid pressure acquisition channel 6 may pass through corresponding through-hole and go deep into the core 3
Portion, and the contact gap between the rigid pressure acquisition channel 6 and corresponding through-hole can be equipped with sealing ring.In an exemplary implementation
In mode, in order to reach better seal effect, the press-in end section of the pressing sleeve 43 can be wedge-shaped (such as shown in Fig. 2).
In one embodiment of the application, described sleeve pipe 41 can be flexible sleeve (such as rubber tube etc.), in this way, can be with
Be conducive to reach better seal effect.
With continued reference to shown in Fig. 1, in one embodiment of the application, the gas path device may include through pipeline successively phase
Air source even, pressure gauge, the first regulating valve, gas boosting pump, the second regulating valve, third regulating valve and vent valve；The core
Clamper forms the pipeline between second regulating valve and the third regulating valve；The flow sensor is located at the third
On pipeline between regulating valve and the vent valve.Wherein, the nontoxic gas such as nitrogen may be used in the air source.Described
One regulating valve is used to control the external gas supply of air source；Second regulating valve and the third regulating valve are in gas reservoir simulation process
For the holding or release of control pressure；The vent valve is used as gas discharge outlet；Gas boosting pump is for by the gas
The gas of source output is pumped into the gap of the rock core, to form reservoir pressure.
Refering to what is shown in Fig. 3, the gas reservoir development analogy method based on above-mentioned gas reservoir development simulation system can include following step
Suddenly：
S101, pretreated core is placed in rock core fastener, and the rigid pressure of each pressure sensor is adopted
Collection channel is respectively implanted the different location inside the core.
In one embodiment of the application, the pretreatment can include：
1), the selected core of drying.
2), the core after drying is vacuumized.
3) after, vacuumizing core water filling pressurization so that it is described vacuumize after core reach aqueous saturation state.
4) several radial holes, are opened up on the core in aqueous saturation state, to accommodate the pressure sensor
The end of rigid pressure acquisition channel is inserted into.
S102, the reservoir confining pressure of the core is loaded onto by preset reservoir confining pressure threshold value by confining pressure device and is kept.
In one embodiment of the application, can confining pressure liquid be injected to the confining pressure intracavitary by the confining pressure device, with shape
Into reservoir confining pressure；When the confining pressure rises to preset reservoir confining pressure threshold value and after stabilizing to the reservoir confining pressure threshold value, close
The confining pressure device, and keep the reservoir confining pressure threshold value.
S103, the reservoir pressure of the core is loaded onto by preset reservoir pressure threshold value by gas path device and is kept.
In one embodiment of the application, third regulating valve is closed, opens the first regulating valve and the second regulating valve, and start
Booster pump, so as to be pumped into the gas that the air source exports in the gap of the rock core, to form reservoir pressure, in reservoir pressure
After being raised slowly to preset reservoir pressure threshold value and stabilizing to the reservoir pressure threshold value, the second regulating valve is closed, to keep being somebody's turn to do
Reservoir pressure threshold value.
S104, the reservoir pressure that the core is gradually unloaded by the gas path device, to simulate gas reservoir development process.
In one embodiment of the application, the third regulating valve is opened according to preset aperture, to simulate gas reservoir failure
Development process, as gas reservoir is gradually produced out, reservoir pressure gradually unloads decline.
S105, during the reservoir pressure is unloaded, the core is acquired in gas reservoir development by flow sensor
The gas reservoir amount being produced out in simulation, and acquire reservoir pressure of the core under different location by multiple pressure sensors
Power.
In one embodiment of the application, above-mentioned data processing equipment is according to the collected multiple spot of above-mentioned pressure sensor
Pressure data can draw the reservoir pressure change profile figure (such as shown in Fig. 4) of different moments and the reservoir pressure of different moments cuts open
Face (such as shown in Fig. 5), so as to be conducive to subsequently according to reservoir pressure mutation analysis reservoir pressure propagation law；And also
Can collected harvesting flow be acquired according to reservoir pressure situation of change and the flow sensor, calculate different reservoir position
Recovery percent of reserves and whole recovery ratio, so that it is determined that reserves exploitation rule.
In one embodiment of the application, the reservoir pressure of the core is being loaded onto preset reservoir pressure threshold value simultaneously
Before holding, it can also include：
Pressure-loaded is carried out to the core by gas path device, with the part water described in displacement in core, so as to make
State core water saturation drop to default water saturation (specifically, by by rock core taking-up weigh, can calculate and contain
The situation of change of water saturation).In this way, before the simulation of each gas reservoir, it can obtain wait from high to low not through the above way
With the rock core in the case of water saturation, simulation is developed to the Gas Reservoirs under different water cut saturation degree so as to realize.
Although procedures described above flow includes the multiple operations occurred with particular order, it should however be appreciated that understand,
These processes can include more or fewer operations.
It should also be noted that, term " comprising ", "comprising" or its any other variant are intended to nonexcludability
Comprising so that method, system or equipment including a series of elements not only include those elements, but also including not having
It the other element that is expressly recited or further includes as this method, system or the intrinsic element of equipment.Not more
In the case of limitation, the element that is limited by sentence "including a ...", it is not excluded that in the method including the element, system
Or also there are other identical elements in equipment.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Point just to refer each other, and the highlights of each of the examples are difference from other examples.
The foregoing is merely embodiments herein, are not limited to the application.For those skilled in the art
For, the application can have various modifications and variations.All any modifications made within spirit herein and principle are equal
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (12)
1. a kind of gas reservoir development simulation system, which is characterized in that including：
Rock core fastener；
Gas path device, for providing reservoir pressure for the core being positioned in the rock core fastener；
Confining pressure device, for providing reservoir confining pressure for the core；
The flow sensor of the gas path device tail portion is installed on, is produced in gas reservoir development simulation for acquiring the core
The gas reservoir amount gone out；
Multiple pressure sensors, for acquiring reservoir pressure of the core under different location in being simulated in gas reservoir development.
2. gas reservoir development simulation system as described in claim 1, which is characterized in that the gas reservoir development simulation system is also wrapped
It includes：
Data processing equipment, for establishing the pressure traverse of different development phases according to the gas reservoir amount and the reservoir pressure,
And gas reservoir pressure propagation and reservoir reserves exploitation rule are determined according to the pressure traverse.
3. gas reservoir development simulation system as claimed in claim 1 or 2, which is characterized in that the multiple pressure sensor includes
First pressure sensor group and second pressure sensor group；
The first pressure sensor group includes two first pressure sensors, is correspondingly arranged in the rock core fastener respectively
Inlet end and exhaust end；
The second pressure sensor group includes several second pressure sensors, and the second pressure sensor is seal-installed on
On the side wall of the rock core fastener, and it is uniformly distributed along the axial direction of the rock core fastener；Each second pressure sensing utensil
There is independent rigid pressure acquisition channel, the end of each rigid pressure acquisition channel is placed in inside the core.
4. gas reservoir development simulation system as claimed in claim 3, which is characterized in that the rigid pressure acquisition channel is equipped with
Filter screen.
5. gas reservoir development simulation system as claimed in claim 3, which is characterized in that the rock core fastener and the core it
Between cavity form confining pressure chamber, the confining pressure device is embodied as the core by injecting confining pressure liquid to the confining pressure intracavitary and provides
Reservoir confining pressure；
The confining pressure intracavitary is equipped with seal isolation component, to realize the seal isolation between the core and the confining pressure liquid；
Correspondingly, the seal isolation component is equipped with several through-holes, the end of each rigid pressure acquisition channel is worn
It crosses corresponding through-hole to go deep into inside the core, and the rigid pressure acquisition channel is set with the contact gap between corresponding through-hole
There is sealing ring.
6. gas reservoir development simulation system as claimed in claim 5, which is characterized in that the seal isolation component includes being suitable for institute
State the casing and the water conservancy diversion plug for being installed on described sleeve pipe both ends that core passes through；The water conservancy diversion is equipped with pressing sleeve beyond the Great Wall, close to compress
Seal the contact gap between described sleeve pipe and the water conservancy diversion plug, the contact between the pressing sleeve and the side wall of the rock core fastener
Gap is equipped with sealing ring.
7. gas reservoir development simulation system as claimed in claim 6, which is characterized in that the press-in end section of the pressing sleeve is wedge
Shape.
8. gas reservoir development simulation system as claimed in claim 6, which is characterized in that described sleeve pipe is flexible sleeve.
9. gas reservoir development simulation system as described in claim 1, which is characterized in that the gas path device include by pipeline according to
Secondary connected air source, pressure gauge, the first regulating valve, gas boosting pump, the second regulating valve, third regulating valve and vent valve；It is described
Rock core fastener forms the pipeline between second regulating valve and the third regulating valve；The flow sensor is located at described
On pipeline between third regulating valve and the vent valve.
10. a kind of gas reservoir development analogy method based on gas reservoir development simulation system described in claim 1 to 9 any one,
It is characterized in that, including：
Pretreated core is placed in rock core fastener, and the rigid pressure acquisition channel of each pressure sensor is distinguished
The different location being placed in inside the core；
The reservoir confining pressure of the core is loaded onto by preset reservoir confining pressure threshold value by confining pressure device and is kept；
The reservoir pressure of the core is loaded onto by preset reservoir pressure threshold value by gas path device and is kept；
The reservoir pressure of the core is gradually unloaded by the gas path device, to simulate gas reservoir development process；
During the reservoir pressure is unloaded, the core is acquired in gas reservoir development simulation by flow sensor and is opened
The gas reservoir amount of extraction, and pass through multiple pressure sensors and acquire reservoir pressure of the core under different location.
11. gas reservoir development analogy method according to claim 10, which is characterized in that the pretreatment includes：
The selected core of drying；
Core after drying is vacuumized；
After vacuumizing core water filling pressurization so that it is described vacuumize after core reach aqueous saturation state；
Several radial holes are opened up on the core in aqueous saturation state, to accommodate the rigid pressure of the pressure sensor
The end of acquisition channel is inserted into.
12. gas reservoir development analogy method according to claim 10, which is characterized in that it is described by gas path device by institute
The reservoir pressure for stating core is loaded onto before preset reservoir pressure threshold value and holding, is further included：
Pressure-loaded is carried out to the core by gas path device, with the part water described in displacement in core, so as to make the rock
Core reaches default water saturation.
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Application publication date: 20180706 |