CN107543785A - 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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- CN107543785A CN107543785A CN201710724837.4A CN201710724837A CN107543785A CN 107543785 A CN107543785 A CN 107543785A CN 201710724837 A CN201710724837 A CN 201710724837A CN 107543785 A CN107543785 A CN 107543785A
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Abstract
The invention discloses a kind of rock core Spontaneous capillary imbibition analog meter, and it includes core holding unit, and core holding unit connects confined pressure pump by the 3rd electrically-controlled valve, second pressure gauge is provided between core holding unit and the 3rd 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 an intermediate receptacle with a scale is connected with fluid flowmeter；Intermediate receptacle with a scale connects pressue device by the first electrically-controlled valve, and first pressure table is provided between intermediate receptacle with a scale and the first electrically-controlled valve；First electrically-controlled valve, the second electrically-controlled valve and the 3rd electrically-controlled valve are connected to system control and data acquisition processing device.Spontaneous capillary imbibition process under the overbalance of present invention energy simulated formation, underbalance, nearly equilibrium condition；Test and data result processing automation are realized using computer in experimentation, obtains the parameters such as Spontaneous capillary imbibition speed and depth of invasion, more preferable simulation core self-priming.
Description
Technical field
The present invention relates to simulation core self-priming field, and in particular to a kind of rock core Spontaneous capillary imbibition analog meter and its user
Method.
Background technology
Rock core Spontaneous imbibition rate generally passes through rock core change in resistance during intelligent LCR measuring measurement rock core self-priming at present
Determine depth of invasion, such measuring apparatus function is single, cumbersome, can not realize using measured in an equipment nearly balance,
Overbalance, underbalance Spontaneous capillary imbibition ability；Existing equipment can not measurement stratum underbalance Spontaneous capillary imbibition ability, it is impossible to old Jing Jing
Hydrops reverse osmosis is drawn through Cheng Jinhang evaluations in cylinder；Rock core wall is also easy to produce self-priming to reality in existing Spontaneous capillary imbibition analog meter test process
Test test result causes error, it is impossible to accurately portrays rock core end face Spontaneous capillary imbibition ability.
The content of the invention
For above-mentioned deficiency of 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 existing simulation core self priming device simulation effect difference.
In order to reach foregoing invention purpose, the technical solution adopted by the present invention is：
A kind of rock core Spontaneous capillary imbibition analog meter is provided, it includes being used for the core holding unit for clamping rock core, core holding unit
Confined pressure pump is connected by the 3rd electrically-controlled valve, confined pressure pump is used to provide rock core confined pressure；
Second pressure detection means is provided between core holding unit and the 3rd electrically-controlled valve；Second pressure detection means is used for
Detect the confined pressure size that confined pressure pump provides；
One end of core holding unit connects one end of back-pressure valve and the 4th electrically-controlled valve respectively, and the other end of the 4th electrically-controlled valve connects
Connect gas boosting pump；Back-pressure valve is used for the upper pressure limit for adjusting 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 a middle appearance with a scale is connected with fluid flowmeter
Device, fluid flowmeter, for recording self-priming liquid stream momentum；Intermediate receptacle with a scale is used to contain from imbibition, and checks self-priming
Liquid stream walks amount；
Intermediate receptacle with a scale connects pressue device, pressue device, in a scale by the first electrically-controlled valve
Between container provide pressure；First pressure detection means, the first pressure are provided between intermediate receptacle with a scale and the first electrically-controlled valve
Force checking device is used to detect the pressure value that pressue device puts on intermediate receptacle with a scale；
First pressure detection means, second pressure detection means and fluid flowmeter are connected to system control and data
The signal input part of acquisition processing device；Pressue device, the first electrically-controlled valve, the second electrically-controlled valve, the 3rd electrically-controlled valve, confined pressure pump, gas
Body booster pump and the 4th electrically-controlled valve are respectively connecting to the signal output part of system control and data acquisition processing device；System controls
And data acquisition processing device is used for gathered data, control is connected to the device of its signal output part, obtains Spontaneous imbibition rate at any time
Between the relation and depth of invasion that change.
Further, system controls and data acquisition processing device is computer；Pressue device is gas cylinder.
Further, in addition to the anti-self-priming apparatus of rock core wall, the anti-self-priming apparatus of rock core wall include being used to be 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 is held on rock core
In core holding unit.
A kind of application method of rock core Spontaneous capillary imbibition analog meter is provided, it comprises the following steps：
S1, pretreatment rock core, obtain rock sample；
S2, rock sample is put into core holding unit, and passes through system control and data acquisition processing device controls confined pressure pump
Stratum overburden pressure P where increasing confined pressure to rock core0；
S3, the second electrically-controlled valve opened by system control and data acquisition processing device, treated from imbibition full of with a scale
The second electrically-controlled valve is closed after pipeline between intermediate receptacle and core holding unit；
S4, back-pressure valve pressure set to formation pore pressure where rock core by system control and data acquisition processing device
Pb, it is P to control the 4th electrically-controlled valve and gas booster pump regulation rock core pore pressureb；
S5, pass through formation condition where pressure to the rock core of system control and data acquisition processing device regulation pressue device
Go into the well cylinder pressure Pa, obtain Spontaneous capillary imbibition pressure difference △ P=Pa-Pb, and emulation mode is judged according to Spontaneous capillary imbibition pressure difference △ P；
S6, the second electrically-controlled valve opened by system control and data acquisition processing device, gathers the data of fluid flowmeter,
Obtain rock core Spontaneous imbibition rate under corresponding emulation mode and change over time relation database table and curve map and depth of invasion.
Further, step S1 specific method is：
S1-1, the cuboid that rock core is prepared into 14mm*14mm*40mm, and carry out first time drying；
S1-2, by first time dry after rock core be put into rubber sleeve, by one end of fresh-keeping membrane closure rubber sleeve, 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 dried 2 hours under the conditions of 60 DEG C；
S1-4, the rock sample after drying is taken out and its both ends of polishing are to exposing fresh core section.
Further, it is according to the method for Spontaneous capillary imbibition pressure difference △ P judgement emulation modes in step S5：
It is simulated formation underbalance when △ P are less than 0MPa,
It is that simulated formation closely balances when △ P are equal to 0MPa,
It is simulated formation overbalance when △ P are more than 0MPa.
Beneficial effects of the present invention are：The invention can meet the rock under measurement simulation nearly balance, overbalance, insufficient balance condition
Heart Spontaneous capillary imbibition speed and depth of invasion parameter, while rock core wall is entered using rubber sleeve and epoxy resin when prepared by rock core
Row pretreatment, avoiding rock core wall self-priming error to caused by experimental results influences；Computer is utilized in experimentation
Test and data result processing automation are realized, obtains the parameters such as Spontaneous capillary imbibition speed and depth of invasion.The present invention has function
Complete, the advantages that automaticity is high, easy to operate, accurate data, meet Spontaneous capillary imbibition characteristic parameter under different pressure differentials
Test.
Brief description of the drawings
Fig. 1 is the structured flowchart of the present invention.
Wherein：1st, pressue device；2nd, intermediate receptacle with a scale；3rd, system control and data acquisition processing device；4th, rock
Heart clamp holder；5th, back-pressure valve；6th, fluid flowmeter；7th, the first electrically-controlled valve；8th, the second electrically-controlled valve；9th, the 3rd electrically-controlled valve；10th, first
Pressure-detecting device；11st, second pressure detection means；12nd, confined pressure pump；13rd, gas boosting pump；14th, the 4th electrically-controlled valve.
Embodiment
The embodiment of the present invention is described below, in order to which those skilled in the art understand this hair
It is bright, it should be apparent that the invention is not restricted to the scope of embodiment, for those skilled in the art,
As long as various change in the spirit and scope of the present invention that appended claim limits and determines, these changes are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the row of protection.
As shown in figure 1, the rock core Spontaneous capillary imbibition analog meter includes being used for the core holding unit 4 for clamping rock core, rock core clamping
Device 4 connects confined pressure pump 12 by the 3rd electrically-controlled valve 9, and confined pressure pump 12 is used to provide rock core confined pressure；
Second pressure detection means 11 is provided between the electrically-controlled valve 9 of core holding unit 4 and the 3rd；Second pressure detection means
11 are used to detect the confined pressure size that confined pressure pump 12 provides；
One end of core holding unit 4 connects one end of the electrically-controlled valve 14 of back-pressure valve 5 and the 4th respectively, the 4th electrically-controlled valve 14 it is another
One end connection gas boosting pump 13；Back-pressure valve 5 is used for the upper pressure limit for adjusting the one end of core holding unit 4, 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 used to contain from imbibition, and checks
Self-priming liquid stream walks amount；
Intermediate receptacle 2 with a scale connects pressue device 1, pressue device 1, for a scale by the first electrically-controlled valve 7
Intermediate receptacle 2 provide pressure；First pressure detection means is provided between the electrically-controlled valve 7 of intermediate receptacle 2 and first with a scale
10, first pressure detection means 10 is used to detect the pressure value that pressue device 1 puts on intermediate receptacle 2 with a scale；
First pressure detection means 10, second pressure detection means 11 and fluid flowmeter 6 are connected to system control
And the signal input part of data acquisition processing device 3；Pressue device 1, the first electrically-controlled valve 7, the second electrically-controlled valve 8, the 3rd electrically-controlled valve
9th, confined pressure pump 12, the electrically-controlled valve 14 of gas boosting pump 13 and the 4th are respectively connecting to system control and data acquisition processing device 3
Signal output part；System controls and data acquisition processing device 3 is used for gathered data, control is connected to the device of its signal output part
Part, obtain relation and depth of invasion that Spontaneous imbibition rate changes over time.
System controls and data acquisition processing device 3 is computer；Pressue device 1 is gas cylinder；First pressure detection means
10 and second pressure detection means 11 can be pressure sensor or the pressure gauge that electric signal can be exported.
The rock core Spontaneous capillary imbibition analog meter also includes the anti-self-priming apparatus of rock core wall, and the anti-self-priming apparatus of rock core wall 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 with
Rock core is held in core holding unit 4.
The application method of the rock core Spontaneous capillary imbibition analog meter comprises the following steps：
S1, pretreatment rock core, obtain rock sample；
S2, rock sample is put into core holding unit 4, and passes through system control and the control of data acquisition processing device 3 the 3rd
Electrically-controlled valve 9 and confined pressure pump 12 increase stratum overburden pressure P where confined pressure to rock core0；
S3, the second electrically-controlled valve 8 opened by system control and data acquisition processing device 3, treated from imbibition full of with a scale
Intermediate receptacle 2 and core holding unit 4 between pipeline after close the second electrically-controlled valve 8；
S4, the pressure of back-pressure valve 5 set to stratum Pore Pressure where rock core by system control and data acquisition processing device 3
Power Pb, it is P to control the 4th electrically-controlled valve 14 and the regulation rock core pore pressure of gas booster pump 13b；
S5, the first electrically-controlled valve 7 is opened by system control and data acquisition processing device 3 and adjusts the pressure of pressue 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 are less than 0MPa
As simulated formation underbalance, it is that simulated formation closely balances when △ P are equal to 0MPa, is to simulate when △ P are more than 0MPa
Stratum overbalance process；
S6, the second electrically-controlled valve 8, the number of collection fluid flowmeter 6 are opened by system control and data acquisition processing device 3
According to obtaining rock core Spontaneous imbibition rate and change over time relation database table and curve map and depth of invasion, the wherein 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 specific method is：
S1-1, the cuboid that rock core is prepared into 14mm*14mm*40mm, and carry out first time drying；
S1-2, by first time dry after rock core be put into rubber sleeve, by one end of fresh-keeping membrane closure rubber sleeve, 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 dried 2 hours under the conditions of 60 DEG C；
S1-4, the rock sample after drying is taken out and its both ends of polishing are to exposing fresh core section.
To sum up, the present invention can meet the rock core Spontaneous capillary imbibition speed under measurement simulation nearly balance, overbalance, insufficient balance condition
With depth of invasion parameter, while rock core wall is pre-processed using rubber sleeve and epoxy resin when prepared by rock core, avoided
The rock core wall self-priming error to caused by experimental results influences；In experimentation test and data are realized using computer
Result treatment automates, and obtains the parameters such as Spontaneous capillary imbibition speed and depth of invasion.The present invention has multiple functional, automaticity
The advantages that high, easy to operate, accurate data, meet the test of Spontaneous capillary imbibition characteristic parameter under different pressure differentials.
Claims (6)
- A kind of 1. rock core Spontaneous capillary imbibition analog meter, it is characterised in that：It is described including the core holding unit (4) for clamping rock core Core holding unit (4) connects confined pressure pump (12) by the 3rd electrically-controlled valve (9), and the confined pressure pump (12) is used to provide rock core confined pressure；Second pressure detection means (11) is provided between the core holding unit (4) and the 3rd electrically-controlled valve (9)；Described Two pressure-detecting devices (11) are used for the confined pressure size for detecting confined pressure pump (12) offer；One end of the core holding unit (4) connects one end of back-pressure valve (5) and the 4th electrically-controlled valve (14), the 4th electricity respectively Control the other end connection gas boosting pump (13) of valve (14)；The back-pressure valve (5) is used for the pressure for adjusting core holding unit (4) one end The power upper limit, carry 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) be used for record 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 connects pressue device (1) by the first electrically-controlled valve (7), and the pressue device (1) is used In providing pressure to intermediate receptacle (2) with a scale；Set between the intermediate receptacle (2) with a scale and the first electrically-controlled valve (7) First pressure detection means (10) is equipped with, the first pressure detection means (10) puts on band for detecting pressue device (1) The pressure value of the intermediate receptacle (2) of scale；The first pressure detection means (10), second pressure detection means (11) and fluid flowmeter (6) are connected to and are System control and the signal input part of data acquisition processing device (3)；The pressue device (1), back-pressure valve (5), the first electrically-controlled valve (7), the second electrically-controlled valve (8), the 3rd electrically-controlled valve (9), confined pressure pump (12), gas boosting pump (13) and the 4th electrically-controlled valve (14) difference It is connected to the signal output part of system control and data acquisition processing device (3)；The system control and data acquisition process dress Put that (3) are used for gathered data, control is connected to the device of its signal output part, obtain relation that Spontaneous imbibition rate changes over time and Depth of invasion.
- 2. rock core Spontaneous capillary imbibition analog meter according to claim 1, it is characterised in that：The system control and data acquisition Processing unit (3) is computer；The pressue device (1) is gas cylinder.
- 3. rock core Spontaneous capillary imbibition analog meter according to claim 1 or 2, it is characterised in that：It is anti-certainly also to include rock core wall Inhale device, the anti-self-priming apparatus of rock core wall includes being used to be set with the rubber sleeve of rock core, and be filled in the rubber sleeve with Epoxy resin between rock core；The anti-self-priming apparatus of rock core wall is held in the core holding unit (4) with rock core.
- 4. a kind of application method of rock core Spontaneous capillary imbibition analog meter, it is characterised in that comprise the following steps：S1, pretreatment rock core, obtain rock sample；S2, rock sample is put into core holding unit (4), and passes through system control and data acquisition processing device (3) controls confined pressure Pump (12) increases stratum overburden pressure P where confined pressure to rock core0；S3, the second electrically-controlled valve (8) opened by system control and data acquisition processing device (3), treated from imbibition full of with a scale Intermediate receptacle (2) and core holding unit (4) between pipeline after close the second electrically-controlled valve (8)；S4, back-pressure valve (5) pressure set to stratum Pore Pressure where rock core by system control and data acquisition processing device (3) Power Pb, it is P to control the 4th electrically-controlled valve (14) and gas booster pump (13) regulation rock core pore pressureb；S5, pass through stratum bar where pressure to the rock core of system control and data acquisition processing device (3) regulation pressue device (1) Part is gone into the well cylinder pressure Pa, obtain Spontaneous capillary imbibition pressure difference △ P=Pa-Pb, and emulation mode is judged according to Spontaneous capillary imbibition pressure difference △ P；S6, the second electrically-controlled valve (8), collection fluid flowmeter (6) opened by system control and data acquisition processing device (3) Data, obtain rock core Spontaneous imbibition rate under corresponding emulation mode and change over time relation database table and curve map and depth of invasion.
- 5. the application method of rock core Spontaneous capillary imbibition analog meter according to claim 4, it is characterised in that step S1's is specific Method is：S1-1, the cuboid that rock core is prepared into 14mm*14mm*40mm, and carry out first time drying；S1-2, by first time dry after rock core be put into rubber sleeve, by one end of fresh-keeping membrane closure rubber sleeve, 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 dried 2 hours under the conditions of 60 DEG C；S1-4, the rock sample after drying is taken out and its both ends of polishing are to exposing fresh core section.
- 6. the application method of rock core Spontaneous capillary imbibition analog meter according to claim 4, it is characterised in that basis in step S5 Spontaneous capillary imbibition pressure difference △ P judge that the method for emulation mode is：It is simulated formation underbalance when △ P are less than 0MPa,It is that simulated formation closely balances when △ P are equal to 0MPa,It is simulated formation overbalance when △ P are more than 0MPa.
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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 |
| CN109142128A (en) * | 2018-07-26 | 2019-01-04 | 中国石油天然气股份有限公司 | A kind of Ternary composite drive well underground extraction equipment dynamic scale formation analogue experiment method and device |
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| CN114295531A (en) * | 2022-03-07 | 2022-04-08 | 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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