CN206038673U - A device for evaluating mobile lower limit of reservoir - Google Patents
A device for evaluating mobile lower limit of reservoir Download PDFInfo
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- CN206038673U CN206038673U CN201620839580.8U CN201620839580U CN206038673U CN 206038673 U CN206038673 U CN 206038673U CN 201620839580 U CN201620839580 U CN 201620839580U CN 206038673 U CN206038673 U CN 206038673U
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Abstract
The utility model provides a device for evaluating mobile lower limit of reservoir relates to the natural gas extraction technique. A device for evaluating mobile lower limit of reservoir includes: the thermostated container has the rock core model in, the thermostated container is adopted device, confined pressure pump and metering device with notes respectively and is connected, data acquisition and processing apparatus for convert the individual well daily output and match individual well daily output expression formula into according to the gas flow rate, wherein, annotate and to adopt the device and include: displacement pump, displacement pump respectively with gas container and liquid container's entry linkage, gas container and liquid container's export all with the entry linkage of rock core model, gas container and liquid container's export all is equipped with the relief valve, gas container and liquid container's export all is connected with the booster pump. There is a booster pump through the exit linkage at gas container and liquid container, provides the high pressure to the entry of rock core model, can be applicable to the darker reservoir of the degree of depth, simulate the reservoir environment better, can improve the accuracy to the evaluation of reservoir flow lower limit.
Description
Technical field
This utility model is related to natural gas extraction technology, more particularly to a kind of device for evaluating reservoir flowing lower limit.
Background technology
Natural gas is a kind of green energy resource, and the exploitation of natural gas is for the development of national economy, significant.It is natural
Gas is imbedded in the rock stratum of crust deep part, and natural gas reservoirs are typically very fine and close, and some reservoirs do not have mobility, or flowing is special
It is not slow.And natural gas is developed from reservoir, need reservoir that there is certain porosity, therefore, generally by determining storage
The lower limit of the porosity of layer evaluates the Development volue of reservoir, determines that the lower limit of reservoirs is that the reasonable development to gas reservoir has important meaning
Justice.As reservoir pressure increases with the increase of depth of reservoirs, and in prior art, determine the conventional experiment dress of the lower limit of reservoirs
Put the simulation reservoir pressure that can be provided less, during for the deeper reservoir of depth, accuracy is poor.
Utility model content
For drawbacks described above of the prior art, this utility model provides a kind of dress for evaluating reservoir flowing lower limit
Put, high pressure can be provided to the entrance of the core model, can be suitably used for the deeper reservoir of depth, more preferable simulation reservoir ring
Border, it is possible to increase the accuracy of the evaluation of lower limit that reservoir is flowed.
This utility model provides a kind of device for evaluating reservoir flowing lower limit, including：Calorstat, the calorstat are used
In providing isoperibol for core model；The calorstat is connected with injection-recovery apparatus, confined pressure pump and metering device respectively；The note
Device for picking injects fluid for being connected with the entrance of the core model to the core model；The confined pressure pump is for rock
Heart model applies burden pressure；The metering device determines gas flow rate for being connected with the outlet of the core model；Data
Collection and processing meanss, for being converted to the individual well daily output according to the gas flow rate, and according to reservoir thickness, porosity, ooze
Rate and the individual well daily output are fitted individual well daily output expression formula thoroughly；
Wherein, injection-recovery apparatus include：Displacement pump, the displacement pump are connected with the entrance of gas container and liquid container respectively
Connect, the outlet of the gas container and liquid container is connected with the entrance of the core model, the gas container and liquid
The outlet of container is equipped with relief valve, and the outlet of the gas container and liquid container is connected with booster pump.
Further, the core model includes：Core holding unit and rock sample, the rock sample are placed on the rock core clamping
In device, the core holding unit with the entrance being connected with the injection-recovery apparatus and with going out that the metering device is connected
Mouthful.
Further, the confined pressure pump is connected with the core holding unit, the confined pressure pump also with first pressure sensor
Connection, to measure the burden pressure of the core model by the first pressure sensor.
Further, the device for evaluating reservoir flowing lower limit also includes back pressure device, for adjusting the rock
Difference between the inlet pressure and outlet back pressure of heart model.
Further, the back pressure device includes：Backpressure pump and back-pressure valve, the back-pressure valve are gone out with the core model
Mouth connection, the backpressure pump are connected with the back-pressure valve；Wherein, connect between the outlet of the back-pressure valve and the core model
There is one-way control valve.
Further, the metering device includes fluid flowmeter and gas flowmeter, the fluid flowmeter with it is described
Back-pressure valve connects, and the gas flowmeter is connected with the fluid flowmeter.
Further, the core model is provided with temperature sensor, and the temperature sensor is used for detecting the rock core mould
The temperature of type；The back-pressure valve is connected with second pressure sensor, and the second pressure sensor is used for detecting the back-pressure valve
Pressure.
Further, outlet six-way valve, the outlet six-way valve is additionally provided between the back-pressure valve and the core model
One-way control valve is provided between the core model, the six-way valve is connected with the 3rd pressure transducer, the outlet clematis stem
Valve is arranged in the calorstat.
Further, one-way control valve is respectively equipped between the booster pump and the gas container and liquid container, institute
State and between displacement pump and the gas container and liquid container, be respectively equipped with one-way control valve, the gas container and liquid container
Outlet be connected to pressure gauge.
Further, the entrance of the gas container and liquid container by entrance six-way valve with the core model connects
Connect, between the gas container and liquid container and the entrance six-way valve, be respectively equipped with one-way control valve, the entrance clematis stem
Be provided with one-way control valve between valve and the core model, the entrance six-way valve is connected with the 4th pressure transducer, it is described enter
Mouth six-way valve is arranged in the calorstat.
The device for evaluating reservoir flowing lower limit that this utility model is provided, by holding in the gas container and liquid
The outlet of device is connected with the booster pump, provides high pressure in order to the entrance to the core model, can be suitably used for depth deeper
Reservoir, more preferable simulation reservoir environment, it is possible to increase to reservoir flow lower limit evaluation accuracy, be gas extraction
More reliable foundation is provided.
Description of the drawings
Fig. 1 is the structural representation of the device that this utility model embodiment is used for evaluating reservoir flowing lower limit.
Wherein, 10- calorstats；20- core models；21- temperature sensors；31- displacement pumps；32- gas containers；33- liquid
Body container；34- booster pumps；35- entrance six-way valves；The 4th pressure transducers of 36-；37- pressure gauges；40- confined pressure pumps；41- first
Pressure transducer；50- metering devices；51- fluid flowmeters；52- gas flowmeters；61- back-pressure valves；62- backpressure pumps；63- goes out
Mouth six-way valve；64- second pressure sensors；The 3rd pressure transducers of 65-.
Specific embodiment
It is for making purpose, technical scheme and the advantage of this utility model embodiment clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described to the technical scheme in this utility model embodiment, it is clear that retouched
The embodiment stated is a part of embodiment of this utility model, rather than the embodiment of whole.
Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.In the case where not conflicting, following enforcement
Feature in example and embodiment can be mutually combined.
Wherein, " on ", D score, the term of "left", "right" etc., be for describing each structure relative position in the accompanying drawings
Relation, only understanding for ease of narration, and be not used to limit the enforceable scope of this utility model, the change of its relativeness or
Adjustment, under without essence change technology contents, when being also considered as the enforceable category of this utility model.
It should be noted that in description of the present utility model, it is different that term " first ", " second " are only used for convenient description
Part, and it is not intended that indicating or implying ordering relation, relative importance or implicit indicate indicated technical characteristic
Quantity.Thus, define " first ", at least one this feature can be expressed or be implicitly included to the feature of " second ".
Fig. 1 is the structural representation of the device that this utility model embodiment is used for evaluating reservoir flowing lower limit.
Refer to Fig. 1, the present embodiment is a kind of to flow the device of lower limit for evaluating reservoir, including：Calorstat 10, constant temperature
Case 10 is used for providing isoperibol for core model 20；Calorstat 10 respectively with injection-recovery apparatus, confined pressure pump 40 and metering device 50
Connection；Injection-recovery apparatus inject fluid for being connected with the entrance of core model 20 to core model 20；Confined pressure pump 40 is for rock
Heart model 20 applies burden pressure；Metering device 50 determines gas flow rate for being connected with the outlet of core model 20；Data are adopted
Collection and processing meanss, for being converted to the individual well daily output according to gas flow rate, and according to reservoir thickness, porosity, permeability and
The individual well daily output is fitted individual well daily output expression formula.
Wherein, injection-recovery apparatus include：Displacement pump 31, displacement pump 31 respectively with gas container 32 and the entrance of liquid container 33
Connection, the outlet of gas container 32 and liquid container 33 are connected with the entrance of core model 20, and gas container 32 and liquid hold
Device 33 is respectively connected with relief valve, and the outlet of gas container 32 and liquid container 33 is connected with booster pump 34.
Calorstat 10 has insulation material to make, and core model 20 is arranged on that calorstat 10 is central, and the left side of calorstat 10 sets
There are injection-recovery apparatus, on the right side of calorstat 10, be provided with metering device 50；Gas easily built with experimental gas, liquid container 33 built with
Stratum water, the fluid in 31 constant pressure displacing gases container 32 of displacement pump and liquid container 33, booster pump 34 is for core model
20 entrance provides high pressure, with more preferable simulation reservoir environment.Data acquisition and processing (DAP) device can be connected with metering device 50,
To obtain gas flow rate.
Wherein, one-way control valve, displacement pump 31 is respectively equipped between booster pump 34 and gas container 32 and liquid container 33
One-way control valve is respectively equipped between gas container 32 and liquid container 33, and one-way control valve is connected for being switched on or off
Connection between two parts for connecing；The outlet of gas container 32 and liquid container 33 is connected to pressure gauge 37, to measure gas
The outlet back pressure of the outlet back pressure of body container 32 and liquid container 33.
Gas container 32 and liquid container 33 are connected with the entrance of core model 20 by entrance six-way valve 35, gas container
Be respectively equipped with one-way control valve between 32 and liquid container 33 and entrance six-way valve 35, entrance six-way valve 35 and core model 20 it
Between be provided with one-way control valve, entrance six-way valve 35 is connected with the 4th pressure transducer 36, and entrance six-way valve 35 is arranged on calorstat
In 10；Wherein, the 4th pressure transducer 36 is used for measuring the inlet pressure of core model 20.
The device for evaluating reservoir flowing lower limit that the present embodiment is provided, by gas container 32 and liquid container 33
Outlet be connected with booster pump 34, in order to core model 20 entrance provide high pressure, can be suitably used for the deeper reservoir of depth,
More preferable simulation reservoir environment, it is possible to increase the accuracy of the evaluation of lower limit of flowing to reservoir, provides more for gas extraction
Reliable foundation.
Further, core model 20 includes：Core holding unit and rock sample, rock sample are placed in core holding unit, rock core
The outlet that clamper is connected with the entrance being connected with injection-recovery apparatus and with metering device 50.Wherein, it is to be suitable for environment under high pressure,
The wall thickness of increase core holding unit.
Further, confined pressure pump 40 is connected with core holding unit, and confined pressure pump 40 is also connected with first pressure sensor 41, with
The burden pressure of core model 20 is measured by first pressure sensor 41.
Wherein, rock sample includes rock core, and rock core is externally provided with rubber, and rubber is externally provided with ferrum set, has ring between rubber and ferrum set
Shape space；Burden pressure is improved to core model 20 by confined pressure pump 40, burden pressure applies to rock sample, and be filled in rubber with
Ferrum set between, with avoid injection-recovery apparatus in core model 20 rock core injection fluid when, the fluid leakage of injection.
The inlet pressure that the burden pressure and booster pump 34 that confined pressure pump 40 is provided is provided alternately rises, for example：Pass through first
Confined pressure pump 40 causes the burden pressure of core model 20 to rise to first pressure, then causes core model 20 by booster pump 34
Inlet pressure rise to second pressure, again lifted core model 20 burden pressure after lifted core model 20 entrance
Pressure, so alternating rise to the inlet pressure of core model 20 and reach strata pressure i.e. reservoir pressure, with protect rock core not by
Damage by pressure；Wherein, burden pressure is consistently greater than inlet pressure.
Further, for evaluating the device of reservoir flowing lower limit, also including back pressure device, for adjusting core model 20
Inlet pressure and outlet back pressure between difference.
Specifically, back pressure device includes：Backpressure pump 62 and back-pressure valve 61, back-pressure valve 61 are connected with the outlet of core model 20
Connect, backpressure pump 62 is connected with back-pressure valve 61；Wherein, it is connected between the outlet of back-pressure valve 61 and core model 20 unidirectionally controlled
Valve.
The outlet back pressure of core model 20 is adjusted by backpressure pump 62 and back-pressure valve 61, with according to simulation pressure set in advance
Difference does gas production experiment, determines the gas flow rate under different pressure reduction respectively.
Further, metering device 50 includes fluid flowmeter 52 and gas flowmeter 51, fluid flowmeter 52 and back pressure
Valve 61 connects, and gas flowmeter 51 is connected with fluid flowmeter 52.Wherein, gas flowmeter 51 is used for measuring gas flow rate, liquid
Flowmeter body 52 is used for measuring fluid flow, when fluid flow and in measure liquid or when fluid flow reaches preset value,
Gas production experiment is completed.
Further, core model 20 is provided with temperature sensor 21, and temperature sensor 21 is used for detecting core model 20
Temperature；Back-pressure valve 61 is connected with second pressure sensor 64, and second pressure sensor 64 is used for detecting the pressure of back-pressure valve 61.
Further, outlet six-way valve 63, outlet six-way valve 63 and rock is additionally provided between back-pressure valve 61 and core model 20
One-way control valve is provided between heart model 20, outlet six-way valve 63 is stated and is connected with three pressure transducers 65, state outlet six-way valve 63
For measuring the outlet back pressure of core model 20, state outlet six-way valve 63 and be arranged in calorstat 10.Wherein, data acquisition and place
Reason device can be with first pressure sensor 41, second pressure sensor 64, three pressure transducers 65, the 4th pressure transducer
36th, temperature sensor 21 connects.
The device for evaluating reservoir flowing lower limit that the present embodiment is provided is utilized to evaluate the concrete behaviour of reservoir flowing lower limit
Making step can be：
Step 1：The rock sample for having prepared drying is weighed, evacuation saturation stratum water is simultaneously weighed again, to determine hole
Cumulative volume；
Step 2：Rock sample is put into into core holding unit, calorstat is warming up to into formation temperature；Rock core saturated air is risen to
The strata pressure of simulation, while improving burden pressure to the burden pressure simulated, and ensures that strata pressure, in the analogue value, maintains 3
Hour；
Step 3：Back pressure device is adjusted, makees gas production experiment according to simulated production pressure reduction set in advance, determine corresponding respectively
Flow velocity under pressure reduction；
Step 4：By data acquisition and processing (DAP) device, the gas flow rate that experiment is obtained is converted to into the daily output of mining site individual well
Amount；
Step 5：Numerical fitting is carried out to the mining site yield for obtaining by data acquisition and processing (DAP) device, obtains considering different
The isoparametric individual well daily output expression formula of reservoir thickness, porosity and permeability；
Step 6：According to the well yield lower limit economically formulated, each reservoir physical parameter under the yield is calculated,
In this, as the reservoir properties lower limit for meeting the yield lower limit.
Flowing the device of lower limit for evaluating reservoir for the present embodiment, can more preferable simulation actual formation High Temperature High Pressure bar
Part, takes into full account each parameter in stratum, so that the yield data for obtaining is close to mining site actual production data；Can also be for different holes
Porosity interval range carries out numerical fitting, can be applicable to hole and oozes the poor gas reservoir of dependency；Must more easily can be considered
The lower limit of reservoirs of the conditions such as different producing pressure differentials, production rate limit；Horizontal well straight well production index ratio can also be increased, the method can
Produce suitable for horizontal well.
Finally it should be noted that：Various embodiments above is only illustrating the technical solution of the utility model, rather than which is limited
System；Although being described in detail to this utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：Which still can be modified to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of each embodiment technical scheme of type.
Claims (10)
1. it is a kind of for evaluate reservoir flow lower limit device, it is characterised in that include：Calorstat, the calorstat be used for be
Core model provides isoperibol；The calorstat is connected with injection-recovery apparatus, confined pressure pump and metering device respectively；The note adopts dress
Put for being connected with the entrance of the core model, fluid is injected to the core model；The confined pressure pump is for rock core mould
Type applies burden pressure；The metering device determines gas flow rate for being connected with the outlet of the core model；Data acquisition
And processing meanss, for being converted to the individual well daily output according to the gas flow rate, and according to reservoir thickness, porosity, permeability
Individual well daily output expression formula is fitted with the individual well daily output；
Wherein, injection-recovery apparatus include：Displacement pump, the displacement pump are connected with the entrance of gas container and liquid container respectively, institute
The outlet for stating gas container and liquid container is connected with the entrance of the core model, and the gas container and liquid container are equal
Relief valve is connected with, the outlet of the gas container and liquid container is connected with booster pump.
2. it is according to claim 1 for evaluate reservoir flow lower limit device, it is characterised in that the core model bag
Include：Core holding unit and rock sample, the rock sample are placed in the core holding unit, the core holding unit with the note
The entrance of device for picking connection and the outlet being connected with the metering device.
3. it is according to claim 2 for evaluate reservoir flow lower limit device, it is characterised in that the confined pressure pump, institute
State confined pressure pump to be connected with the core holding unit, the confined pressure pump is also connected with first pressure sensor, to pass through described first
Pressure transducer measures the burden pressure of the core model.
4. it is according to claim 2 for evaluate reservoir flow lower limit device, it is characterised in that also including back pressure fill
Put, for adjusting the difference between the inlet pressure of the core model and outlet back pressure.
5. it is according to claim 4 for evaluate reservoir flow lower limit device, it is characterised in that the back pressure device bag
Include：Backpressure pump and back-pressure valve, the back-pressure valve are connected with the outlet of the core model, and the backpressure pump is connected with the back-pressure valve
Connect；Wherein, one-way control valve is connected between the outlet of the back-pressure valve and the core model.
6. it is according to claim 5 for evaluate reservoir flow lower limit device, it is characterised in that the metering device bag
Include fluid flowmeter and gas flowmeter, the fluid flowmeter is connected with the back-pressure valve, the gas flowmeter with it is described
Fluid flowmeter connects.
7. it is according to claim 5 for evaluate reservoir flow lower limit device, it is characterised in that the core model sets
There is temperature sensor, the temperature sensor is used for detecting the temperature of the core model；The back-pressure valve is passed with second pressure
Sensor connects, and the second pressure sensor is used for detecting the pressure of the back-pressure valve.
8. it is according to claim 5 for evaluate reservoir flow lower limit device, it is characterised in that the back-pressure valve and institute
State, between the outlet six-way valve and the core model, be provided with unidirectionally controlled
Valve, the six-way valve are connected with the 3rd pressure transducer, and the outlet six-way valve is arranged in the calorstat.
9. it is according to claim 1 for evaluate reservoir flow lower limit device, it is characterised in that the booster pump and institute
State, the displacement pump and the gas container and liquid container
Between be respectively equipped with one-way control valve, the outlet of the gas container and liquid container is connected to pressure gauge.
10. it is according to claim 1 for evaluate reservoir flow lower limit device, it is characterised in that the gas container
Be connected with the entrance of the core model by entrance six-way valve with liquid container, the gas container and liquid container with it is described
One-way control valve is respectively equipped between entrance six-way valve, is provided with unidirectionally controlled between the entrance six-way valve and the core model
Valve, the entrance six-way valve are connected with the 4th pressure transducer, and the entrance six-way valve is arranged in the calorstat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620839580.8U CN206038673U (en) | 2016-08-04 | 2016-08-04 | A device for evaluating mobile lower limit of reservoir |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620839580.8U CN206038673U (en) | 2016-08-04 | 2016-08-04 | A device for evaluating mobile lower limit of reservoir |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109632557A (en) * | 2019-01-22 | 2019-04-16 | 中国矿业大学 | A kind of gas-liquid two-phase saturation coal petrography sample experimental provision and saturation degree test method |
| CN110018105A (en) * | 2019-04-29 | 2019-07-16 | 中国石油大学(北京) | Matrix-Fracture System gas simulated flowing apparatus and method |
| CN110806370A (en) * | 2018-08-06 | 2020-02-18 | 中国石油天然气股份有限公司 | Rock sample dynamic imbibition experimental device and method |
| CN111678849A (en) * | 2019-03-11 | 2020-09-18 | 中国石油化工股份有限公司 | Experimental device and method for gas-liquid sulfur two-phase seepage curve |
| CN109682734B (en) * | 2017-10-19 | 2024-04-30 | 中国石油大学(北京) | Device and method for determining seepage characteristics of ultrahigh-pressure gas reservoir |
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2016
- 2016-08-04 CN CN201620839580.8U patent/CN206038673U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682734B (en) * | 2017-10-19 | 2024-04-30 | 中国石油大学(北京) | Device and method for determining seepage characteristics of ultrahigh-pressure gas reservoir |
| CN110806370A (en) * | 2018-08-06 | 2020-02-18 | 中国石油天然气股份有限公司 | Rock sample dynamic imbibition experimental device and method |
| CN110806370B (en) * | 2018-08-06 | 2022-08-30 | 中国石油天然气股份有限公司 | Rock sample dynamic imbibition experimental device and method |
| CN109632557A (en) * | 2019-01-22 | 2019-04-16 | 中国矿业大学 | A kind of gas-liquid two-phase saturation coal petrography sample experimental provision and saturation degree test method |
| CN109632557B (en) * | 2019-01-22 | 2021-11-16 | 中国矿业大学 | Gas-liquid two-phase saturated coal rock sample experimental device and saturation testing method |
| CN111678849A (en) * | 2019-03-11 | 2020-09-18 | 中国石油化工股份有限公司 | Experimental device and method for gas-liquid sulfur two-phase seepage curve |
| CN110018105A (en) * | 2019-04-29 | 2019-07-16 | 中国石油大学(北京) | Matrix-Fracture System gas simulated flowing apparatus and method |
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