CN107543785B - A kind of rock core Spontaneous capillary imbibition analog meter and its application method - Google Patents
A kind of rock core Spontaneous capillary imbibition analog meter and its application method Download PDFInfo
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- CN107543785B CN107543785B CN201710724837.4A CN201710724837A CN107543785B CN 107543785 B CN107543785 B CN 107543785B CN 201710724837 A CN201710724837 A CN 201710724837A CN 107543785 B CN107543785 B CN 107543785B
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Abstract
The invention discloses a kind of rock core Spontaneous capillary imbibition analog meters comprising core holding unit, core holding unit connect confining pressure pump by third electrically-controlled valve, be provided with second pressure gauge between core holding unit and third electrically-controlled valve；One end of core holding unit connects a back-pressure valve, and the other end of core holding unit passes sequentially through the second electrically-controlled valve and connects an intermediate receptacle with a scale with fluid flowmeter；Intermediate receptacle with a scale connects pressurizing device by the first electrically-controlled valve, is provided with first pressure gauge between intermediate receptacle with a scale and the first electrically-controlled valve；First electrically-controlled valve, the second electrically-controlled valve and third electrically-controlled valve are connected to system control and data acquisition processing device.Spontaneous capillary imbibition process under energy simulated formation overbalance of the present invention, underbalance, nearly equilibrium condition；Test and data result processing automation are realized using computer in experimentation, obtain the parameters such as Spontaneous capillary imbibition speed and depth of invasion, better simulation core self-priming.
Description
Technical field
The present invention relates to simulation core self-priming fields, and in particular to a kind of rock core Spontaneous capillary imbibition analog meter and its user
Method.
Background technique
Rock core Spontaneous imbibition rate usually passes through rock core change in resistance during intelligent LCR measuring measurement rock core self-priming at present
Determine depth of invasion, such measuring device has a single function, cumbersome, cannot achieve using measured in an equipment nearly balance,
Overbalance, underbalance Spontaneous capillary imbibition ability；Existing equipment is unable to measure formation underbalanced Spontaneous capillary imbibition ability, cannot be to old Jing Jing
Hydrops reverse osmosis is drawn through Cheng Jinhang evaluation in cylinder；Rock core wall surface is also easy to produce self-priming to reality in existing Spontaneous capillary imbibition analog meter test process
Test test result causes error, cannot accurately portray rock core end face Spontaneous capillary imbibition ability.
Summary of the invention
For above-mentioned deficiency in the prior art, a kind of rock core Spontaneous capillary imbibition analog meter provided by the invention and its user
Method solves the problems, such as that existing simulation core self priming device simulation effect is poor.
In order to achieve the above object of the invention, the technical solution adopted by the present invention are as follows:
There is provided a kind of rock core Spontaneous capillary imbibition analog meter comprising for clamping the core holding unit of rock core, core holding unit
Confining pressure pump is connected by third electrically-controlled valve, confining pressure is pumped for providing rock core confining pressure；
Second pressure detection device is provided between core holding unit and third electrically-controlled valve；Second pressure detection device is used for
Detect the confining pressure size that confining pressure pump provides；
One end of core holding unit is separately connected one end of back-pressure valve and the 4th electrically-controlled valve, and the other end of the 4th electrically-controlled valve connects
Connect gas booster pump；Back-pressure valve is used to adjust the upper pressure limit of core holding unit one end, carries out pressure release；
The other end of core holding unit passes sequentially through the second electrically-controlled valve and connects an intermediate appearance with a scale with fluid flowmeter
Device, fluid flowmeter, for recording self-priming liquid stream momentum；Intermediate receptacle with a scale checks self-priming for containing from imbibition
Liquid stream walks amount；
Intermediate receptacle with a scale connects pressurizing device, pressurizing device, for in a scale by the first electrically-controlled valve
Between container provide pressure；First pressure detection device, the first pressure are provided between intermediate receptacle and the first electrically-controlled valve with a scale
Force checking device is for detecting the pressure value that pressurizing device is applied to intermediate receptacle with a scale；
First pressure detection device, second pressure detection device and fluid flowmeter are connected to system control and data
The signal input part of acquisition processing device；Pressurizing device, the first electrically-controlled valve, the second electrically-controlled valve, third electrically-controlled valve, confining pressure pump, gas
Body booster pump and the 4th electrically-controlled valve are respectively connected to the signal output end of system control and data acquisition processing device；System control
And data acquisition processing device is used to acquire data, control is connected to the device of its signal output end, obtains Spontaneous imbibition rate at any time
Between the relationship and depth of invasion that change.
Further, system control and data acquisition processing device are computer；Pressurizing device is gas cylinder.
It further, further include the anti-self-priming apparatus of rock core wall surface, the anti-self-priming apparatus of rock core wall surface includes for being set with rock core
Rubber sleeve, and the epoxy resin being filled between rubber sleeve and rock core；The anti-self-priming apparatus of rock core wall surface is held on rock core
In core holding unit.
There is provided a kind of application method of rock core Spontaneous capillary imbibition analog meter comprising following steps:
S1, pretreatment rock core, obtain rock sample；
S2, rock sample is put into core holding unit, and confining pressure pump is controlled by system control and data acquisition processing device
Stratum overburden pressure P where increasing confining pressure to rock core0；
S3, the second electrically-controlled valve is opened by system control and data acquisition processing device, it is with a scale to be full of from imbibition
The second electrically-controlled valve is closed after pipeline between intermediate receptacle and core holding unit；
S4, back-pressure valve pressure is set by system control and data acquisition processing device to rock core place formation pore pressure
Pb, control the 4th electrically-controlled valve and gas booster pump adjust rock core pore pressure as Pb；
S5, pass through formation condition where pressure to the rock core of system control and data acquisition processing device adjusting pressurizing device
Go into the well cylinder pressure Pa, obtain Spontaneous capillary imbibition pressure difference △ P=Pa-Pb, and emulation mode is determined according to Spontaneous capillary imbibition pressure difference △ P；
S6, the second electrically-controlled valve is opened by system control and data acquisition processing device, acquires the data of fluid flowmeter,
It obtains rock core Spontaneous imbibition rate under corresponding emulation mode and changes over time relation database table and curve graph and depth of invasion.
Further, step S1 method particularly includes:
S1-1, the cuboid that rock core is prepared into 14mm*14mm*40mm, and carry out first time drying；
S1-2, the rock core after first time drying is put into rubber sleeve, one end of rubber sleeve is closed by preservative film, and lead to
The other end for crossing rubber sleeve fills gelatinous epoxy resin between rubber sleeve and rock core, obtains rock sample；
S1-3, rock sample is dried 2 hours under the conditions of 60 DEG C；
S1-4, the rock sample after drying is taken out and polish its both ends to expose fresh core section.
Further, the method for emulation mode is determined in step S5 according to Spontaneous capillary imbibition pressure difference △ P are as follows:
The as simulated formation underbalance when △ P is less than 0MPa,
When △ P is equal to 0MPa, as simulated formation is closely balanced,
The as simulated formation overbalance when △ P is greater than 0MPa.
The invention has the benefit that the invention is able to satisfy the rock under measurement simulation nearly balance, overbalance, insufficient balance condition
Heart Spontaneous capillary imbibition rate and depth of invasion parameter, at the same in rock core preparation using rubber sleeve and epoxy resin to rock core wall surface into
Row pretreatment avoids the influence of rock core wall surface self-priming error caused by experimental results；Computer is utilized in experimentation
It realizes test and data result processing automation, obtains the parameters such as Spontaneous capillary imbibition speed and depth of invasion.The present invention has function
The advantages that complete, high degree of automation, easy to operate, accurate data, meet Spontaneous capillary imbibition characteristic parameter under different pressure differentials
Test.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention.
Wherein: 1, pressurizing device；2, intermediate receptacle with a scale；3, system control and data acquisition processing device；4, rock
Heart clamp holder；5, back-pressure valve；6, fluid flowmeter；7, the first electrically-controlled valve；8, the second electrically-controlled valve；9, third electrically-controlled valve；10, first
Pressure-detecting device；11, second pressure detection device；12, confining pressure pumps；13, gas booster pump；14, the 4th electrically-controlled valve.
Specific embodiment
A specific embodiment of the invention is described below, in order to facilitate understanding by those skilled in the art this hair
It is bright, it should be apparent that the present invention is not limited to the ranges of specific embodiment, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, these variations are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the column of protection.
As shown in Figure 1, the rock core Spontaneous capillary imbibition analog meter includes the core holding unit 4 for clamping rock core, rock core clamping
Device 4 connects confining pressure pump 12 by third electrically-controlled valve 9, and confining pressure pump 12 is for providing rock core confining pressure；
Second pressure detection device 11 is provided between core holding unit 4 and third electrically-controlled valve 9；Second pressure detection device
The 11 confining pressure sizes provided for detecting confining pressure pump 12；
One end of core holding unit 4 is separately connected one end of back-pressure valve 5 and the 4th electrically-controlled valve 14, the 4th electrically-controlled valve 14 it is another
One end connects gas booster pump 13；Back-pressure valve 5 is used to adjust the upper pressure limit of 4 one end of core holding unit, carries out pressure release；
The other end of core holding unit 4 passes sequentially through the second electrically-controlled valve 8 and fluid flowmeter 6 connects a centre with a scale
Container 2, fluid flowmeter 6, for recording self-priming liquid stream momentum；Intermediate receptacle 2 with a scale is checked for containing from imbibition
Self-priming liquid stream walks amount；
Intermediate receptacle 2 with a scale connects pressurizing device 1 by the first electrically-controlled valve 7, and pressurizing device 1 is used for a scale
Intermediate receptacle 2 provide pressure；First pressure detection device is provided between intermediate receptacle 2 and the first electrically-controlled valve 7 with a scale
10, first pressure detection device 10 is for detecting the pressure value that pressurizing device 1 is applied to intermediate receptacle 2 with a scale；
First pressure detection device 10, second pressure detection device 11 and fluid flowmeter 6 are connected to system control
And the signal input part of data acquisition processing device 3；Pressurizing device 1, the first electrically-controlled valve 7, the second electrically-controlled valve 8, third electrically-controlled valve
9, confining pressure pump 12, gas booster pump 13 and the 4th electrically-controlled valve 14 are respectively connected to system control and data acquisition processing device 3
Signal output end；System control and data acquisition processing device 3 are used to acquire data, control is connected to the device of its signal output end
Part obtains the relationship and depth of invasion that Spontaneous imbibition rate changes over time.
System control and data acquisition processing device 3 are computer；Pressurizing device 1 is gas cylinder；First pressure detection device
10 and second pressure detection device 11 can be pressure sensor, be also possible to that the pressure gauge of electric signal can be exported.
The rock core Spontaneous capillary imbibition analog meter further includes the anti-self-priming apparatus of rock core wall surface, and the anti-self-priming apparatus of rock core wall surface includes using
In the rubber sleeve of suit rock core, and the epoxy resin being filled between rubber sleeve and rock core；The anti-self-priming apparatus of rock core wall surface with
Rock core is held in core holding unit 4.
The application method of the rock core Spontaneous capillary imbibition analog meter the following steps are included:
S1, pretreatment rock core, obtain rock sample；
S2, rock sample is put into core holding unit 4, and third is controlled by system control and data acquisition processing device 3
Electrically-controlled valve 9 and confining pressure pump 12 increase stratum overburden pressure P where confining pressure to rock core0；
S3, the second electrically-controlled valve 8 is opened by system control and data acquisition processing device 3, it is with a scale to be full of from imbibition
Intermediate receptacle 2 and core holding unit 4 between pipeline after close the second electrically-controlled valve 8；
S4,5 pressure of back-pressure valve is set by system control and data acquisition processing device 3 to rock core place stratum Pore Pressure
Power Pb, control the 4th electrically-controlled valve 14 and gas booster pump 13 adjust rock core pore pressure as Pb；
S5, the first electrically-controlled valve 7 is opened by system control and data acquisition processing device 3 and adjusts the pressure of pressurizing device 1
Well cylinder pressure P under the conditions of stratum where power to rock corea, obtain Spontaneous capillary imbibition pressure difference △ P=Pa-Pb；When △ P is less than 0MPa
As simulated formation underbalance, when △ P is equal to 0MPa, as simulated formation is closely balanced, and is to simulate when △ P is greater than 0MPa
Stratum overbalance process；
S6, the second electrically-controlled valve 8 is opened by system control and data acquisition processing device 3, acquires the number of fluid flowmeter 6
According to obtaining rock core Spontaneous imbibition rate and change over time relation database table and curve graph and depth of invasion, wherein the time can be by system
Control and data acquisition processing device 3 carry out timing when receiving 6 liquid flow signals of fluid flowmeter.
Step S1's method particularly includes:
S1-1, the cuboid that rock core is prepared into 14mm*14mm*40mm, and carry out first time drying；
S1-2, the rock core after first time drying is put into rubber sleeve, one end of rubber sleeve is closed by preservative film, and lead to
The other end for crossing rubber sleeve fills gelatinous epoxy resin between rubber sleeve and rock core, obtains rock sample；
S1-3, rock sample is dried 2 hours under the conditions of 60 DEG C；
S1-4, the rock sample after drying is taken out and polish its both ends to expose fresh core section.
To sum up, the present invention is able to satisfy the rock core Spontaneous capillary imbibition rate under measurement simulation nearly balance, overbalance, insufficient balance condition
With depth of invasion parameter, while using rubber sleeve and epoxy resin rock core wall surface is pre-processed, is avoided in rock core preparation
Rock core wall surface self-priming error caused by experimental results influences；Test and data are realized using computer in experimentation
Result treatment automation, obtains the parameters such as Spontaneous capillary imbibition speed and depth of invasion.The present invention has multiple functional, the degree of automation
The advantages that high, easy to operate, accurate data, meet the test of Spontaneous capillary imbibition characteristic parameter under different pressure differentials.
Claims (3)
1. a kind of application method of rock core Spontaneous capillary imbibition analog meter, which is characterized in that rock core Spontaneous capillary imbibition analog meter includes being used for
The core holding unit (4) of rock core is clamped, the core holding unit (4) connects confining pressure pump (12) by third electrically-controlled valve (9), described
Confining pressure pump (12) is for providing rock core confining pressure；
Second pressure detection device (11) are provided between the core holding unit (4) and the third electrically-controlled valve (9)；Described
Two pressure-detecting devices (11) are used to detect the confining pressure size that confining pressure pump (12) provides；
One end of the core holding unit (4) is separately connected one end of back-pressure valve (5) and the 4th electrically-controlled valve (14), the 4th electricity
The other end for controlling valve (14) connects gas booster pump (13)；The back-pressure valve (5) is used to adjust the pressure of core holding unit (4) one end
The power upper limit carries out pressure release；
The other end of the core holding unit (4) passes sequentially through the second electrically-controlled valve (8) and fluid flowmeter (6) connection one is with a scale
Intermediate receptacle (2), the fluid flowmeter (6) is for recording self-priming liquid stream momentum；The intermediate receptacle (2) with a scale is used
In splendid attire from imbibition, and check that self-priming liquid stream walks amount；
The intermediate receptacle (2) with a scale is used by the first electrically-controlled valve (7) connection pressurizing device (1), the pressurizing device (1)
In providing pressure to intermediate receptacle (2) with a scale；It is set between the intermediate receptacle (2) and the first electrically-controlled valve (7) with a scale
It is equipped with first pressure detection device (10), the first pressure detection device (10) is applied to band for detecting pressurizing device (1)
The pressure value of the intermediate receptacle (2) of scale；
The first pressure detection device (10), second pressure detection device (11) and fluid flowmeter (6) are connected to and are
The signal input part of system control and data acquisition processing device (3)；The pressurizing device (1), back-pressure valve (5), the first electrically-controlled valve
(7), the second electrically-controlled valve (8), third electrically-controlled valve (9), confining pressure pump (12), gas booster pump (13) and the 4th electrically-controlled valve (14) difference
It is connected to the signal output end of system control and data acquisition processing device (3)；The system control and data acquisition process dress
Set (3) for acquiring data, control is connected to the device of its signal output end, obtain relationship that Spontaneous imbibition rate changes over time and
Depth of invasion；
The system control and data acquisition processing device (3) are computer；The pressurizing device (1) is gas cylinder；
It further include the anti-self-priming apparatus of rock core wall surface, the anti-self-priming apparatus of rock core wall surface includes the rubber sleeve for being set with rock core,
And it is filled in the epoxy resin between the rubber sleeve and rock core；The anti-self-priming apparatus of rock core wall surface is held on institute with rock core
It states in core holding unit (4)；
The application method of rock core Spontaneous capillary imbibition analog meter the following steps are included:
S1, pretreatment rock core, obtain rock sample；
S2, rock sample is put into core holding unit (4), and confining pressure is controlled by system control and data acquisition processing device (3)
It pumps (12) and increases stratum overburden pressure P where confining pressure to rock core0；
S3, the second electrically-controlled valve (8) are opened by system control and data acquisition processing device (3), it is with a scale to be full of from imbibition
Intermediate receptacle (2) and core holding unit (4) between pipeline after close the second electrically-controlled valve (8)；
S4, back-pressure valve (5) pressure is set by system control and data acquisition processing device (3) to rock core place stratum Pore Pressure
Power Pb, control the 4th electrically-controlled valve (14) and gas booster pump (13) adjust rock core pore pressure as Pb；
S5, pass through stratum item where pressure to the rock core of system control and data acquisition processing device (3) adjusting pressurizing device (1)
Part is gone into the well cylinder pressure Pa, obtain Spontaneous capillary imbibition pressure difference △ P=Pa-Pb, and emulation mode is determined according to Spontaneous capillary imbibition pressure difference △ P；
S6, the second electrically-controlled valve (8) are opened by system control and data acquisition processing device (3), acquisition fluid flowmeter (6)
Data obtain rock core Spontaneous imbibition rate under corresponding emulation mode and change over time relation database table and curve graph and depth of invasion.
2. the application method of rock core Spontaneous capillary imbibition analog meter according to claim 1, which is characterized in that step S1's is specific
Method are as follows:
S1-1, the cuboid that rock core is prepared into 14mm*14mm*40mm, and carry out first time drying；
S1-2, the rock core after first time drying is put into rubber sleeve, one end of rubber sleeve is closed by preservative film, and pass through rubber
The other end of gum cover fills gelatinous epoxy resin between rubber sleeve and rock core, obtains rock sample；
S1-3, rock sample is dried 2 hours under the conditions of 60 DEG C；
S1-4, the rock sample after drying is taken out and polish its both ends to expose fresh core section.
3. the application method of rock core Spontaneous capillary imbibition analog meter according to claim 1, which is characterized in that basis in step S5
The method of Spontaneous capillary imbibition pressure difference △ P judgement emulation mode are as follows:
The as simulated formation underbalance when △ P is less than 0MPa,
When △ P is equal to 0MPa, as simulated formation is closely balanced,
The as simulated formation overbalance when △ P is greater than 0MPa.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108387501A (en) * | 2018-03-07 | 2018-08-10 | 西南石油大学 | A method of it is tested based on self-priming and determines shale reservoir rationally most short closed time |
| CN109142128B (en) * | 2018-07-26 | 2021-04-27 | 中国石油天然气股份有限公司 | Dynamic scaling simulation experiment method and device for underground production equipment of ASP flooding oil well |
| CN109342289A (en) * | 2018-11-08 | 2019-02-15 | 西南石油大学 | A kind of shale imbibition device and method under the conditions of simulation original place |
| CN114295531B (en) * | 2022-03-07 | 2022-05-20 | 成都理工大学 | Device and method for accurately simulating self-absorption amount of drilling completion fluid under in-situ condition |
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