CN203630018U - Unstable-state determination device for permeability of hyposmosis rock - Google Patents
Unstable-state determination device for permeability of hyposmosis rock Download PDFInfo
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- CN203630018U CN203630018U CN201320755262.XU CN201320755262U CN203630018U CN 203630018 U CN203630018 U CN 203630018U CN 201320755262 U CN201320755262 U CN 201320755262U CN 203630018 U CN203630018 U CN 203630018U
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- valve
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Abstract
The utility model provides an unstable-state determination device for the permeability of hyposmosis rock. The determination device comprises a rock core clamping device for containing a rock core sample, wherein the side wall of the clamping device is connected onto an annular pressure pump; the clamping device is provided with an inlet pipeline and an outlet pipeline; the inlet pipeline is internally provided with an inlet buffering container; the outlet pipeline is internally provided with an outlet buffering container; a checking loop is arranged and is parallel to the clamping device; the checking loop is internally provided with a checking cylinder. With the adoption of the unstable-state determination device for the permeability of the hyposmosis rock, the permeability of a hyposmosis rock core can be rapidly and accurately determined and the permeability of the hyposmosis rock core sample can be determined by using two unstable-state methods; the unstable-state determination device for the permeability of the hyposmosis rock is simple to operate and accurate to test; the sizes of the volumes of the inlet buffering container and the outlet buffering container can be adjusted according to the porosity of the rock core so that the determination precision of the permeability is guaranteed.
Description
Technical field
The utility model is about the determinator for permeability of low-leakage stones such as tight sand, coal petrography, mud stone, shale in oil, geology, laboratory, mining industry field, relates in particular to a kind of tight rock permeability unstable state determinator.
Background technology
At present, the exploration and development aspect of the low permeability gas reservoirs such as compact sandstone gas, shale gas, coal-seam gas has obtained a series of progress, and permeability has become one of key parameter of evaluating low permeability reservoir.Existing laboratory core permeability is measured and is adopted steady state method, ultimate principle is according to Darcy's law (the rock permeability test that permeability is greater than 0.1mD is mainly based on Darcy's law), under metering certain pressure, by the fluid flow of rock core, calculate permeability according to Darcy formula.But, adopt such measurement mechanism and method in the time measuring low permeability cores sample (permeability <0.1mD), because rock permeability factor of porosity is low, poor connectivity between hole, often fluid cannot pass through, and is difficult to obtain and stablize flow velocity in the short time, and metering difficulty is large, length consuming time, precision is low.
Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes a kind of tight rock permeability unstable state determinator, to overcome the defect of prior art.
Utility model content
The purpose of this utility model is to provide a kind of tight rock permeability unstable state determinator, in order to measure accurately and efficiently the permeability of low permeability cores sample.
The purpose of this utility model is achieved in that a kind of tight rock permeability unstable state determinator, and described determinator comprises a core holding unit for accommodating core sample, and the sidewall of described core holding unit is connected in ring press pump by pipeline; The entrance point of described core holding unit is provided with inlet ductwork, and endpiece is provided with export pipeline; In described inlet ductwork, be sequentially provided with inlet pressure sensor, gas admittance valve, pressure regulator valve and cylinder; In described export pipeline, be sequentially provided with outlet pressure sensor and atmospheric valve; In described inlet ductwork and between core holding unit entrance point and inlet pressure sensor, be provided with an import buffer container by the first pipeline communication; In described export pipeline and between outlet port of rock core holder and outlet pressure sensor, be communicated with and be provided with an outlet buffer container by second pipe; Between described core holding unit entrance point and the first pipeline, be provided with the first valve; In described second pipe, be provided with the second valve; Be arranged in parallel a verification loop with core holding unit, in described verification loop, be provided with a verification cylinder, verification cylinder both sides are respectively equipped with the 3rd valve and the 4th valve, described verification loop input end is connected in the inlet ductwork between the first pipeline and the first valve, and described verification loop output terminal is connected in the export pipeline between second pipe and outlet port of rock core holder; Be arranged in parallel one the 5th valve with described verification cylinder.
In a preferred embodiments of the present utility model, described import buffer container and outlet buffer container are made up of cylindric stainless steel sealed cylinder block respectively; Described sealed cylinder block is provided with the sealing cylinder cap that can dismantle; Cylindric solid steel block is selectively set in described cylinder body.
In a preferred embodiments of the present utility model, in described import buffer container and outlet buffer container, multiple cylindric solid steel block are selectively set.
In a preferred embodiments of the present utility model, the thickness of described each solid steel block is different; The diameter of each solid steel block is identical with the internal diameter of each buffer container.
In a preferred embodiments of the present utility model, described core sample is the rock core drill string of diameter 2.54cm.
From the above mentioned, utilize tight rock permeability unstable state determinator of the present utility model, can rapid and accurate determination low permeability reservoir core permeability, can realize two kinds of unstable state methods and measure low permeability cores sample permeabilities, simple to operate, test is accurately; Can regulate according to core porosity the size of import and export buffer container volume, to guarantee the precision of permeability determination.
Accompanying drawing explanation
The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the structural representation of the utility model tight rock permeability unstable state determinator.
Fig. 2: for unstable state method transient pulse method inlet and outlet pressure in the utility model is schemed over time.
Fig. 3: for the logarithm of the utility model unstable state method transient pulse method mean pressure is schemed over time.
Embodiment
Understand for technical characterictic of the present utility model, object and effect being had more clearly, now contrast accompanying drawing embodiment of the present utility model is described.
As shown in Figure 1, the utility model proposes a kind of tight rock permeability unstable state determinator 100, described determinator 100 comprises a core holding unit 1 for accommodating core sample, and the sidewall of described core holding unit 1 is connected in ring press pump 2 by pipeline; The entrance point of described core holding unit 1 is provided with inlet ductwork 3, and endpiece is provided with export pipeline 4; In described inlet ductwork 3, be sequentially provided with inlet pressure sensor 31, gas admittance valve 32, pressure regulator valve 33 and cylinder 34; In described export pipeline 4, be sequentially provided with outlet pressure sensor 41 and atmospheric valve 42; In described inlet ductwork 3 and between core holding unit 1 entrance point and inlet pressure sensor 31, be communicated with and be provided with an import buffer container 51 by the first pipeline 5; In described export pipeline 4 and between core holding unit 1 endpiece and outlet pressure sensor 41, be communicated with and be provided with an outlet buffer container 61 by second pipe 6; Between described core holding unit entrance point and the first pipeline 5, be provided with the first valve 71; In described second pipe 6, be provided with the second valve 72; Be arranged in parallel a verification loop 8 with core holding unit 1, the volume that is provided with a verification cylinder 81(verification cylinder 81 in described verification loop 8 is known), verification cylinder 81 both sides are respectively equipped with the 3rd valve 73 and the 4th valve 74, described verification loop 8 input ends are connected in the inlet ductwork 3 between the first pipeline 5 and the first valve 71, and described verification loop 8 output terminals are connected in the export pipeline 4 between second pipe 6 and outlet port of rock core holder; Be arranged in parallel one the 5th valve 75 with described verification cylinder.
In the present embodiment, described import buffer container 51 and outlet buffer container 61 are made up of cylindric stainless steel sealed cylinder block respectively; Described sealed cylinder block is provided with the sealing cylinder cap 511,611 that can dismantle; Cylindric solid steel block is selectively set in described cylinder body.In described import buffer container 51 and outlet buffer container 61, multiple cylindric solid steel block are selectively set.Can need to or take out solid steel block to change the volume of buffer container to filling in import buffer container 51 and outlet buffer container 61 according to measuring; In the present embodiment, the thickness of described each solid steel block is different; The diameter of each solid steel block is identical with the internal diameter of each buffer container; The volume of each solid steel block is known.In the present embodiment, also can substitute described solid steel block by the known steel ball of multiple volumes (steel ball) is filled in import buffer container 51 or outlet buffer container 61, to change the volume of buffer container.
The utility model tight rock permeability unstable state determinator, can utilize variation and entrance point, the endpiece pressure balance time of core holding unit entrance point, endpiece pressure differential to calculate permeability, can measure accurately and efficiently the permeability of low permeability cores sample; The permeability test specification of this determinator is 0.00001～0.1mD, and core sample specification is the rock core drill string of diameter 2.54cm.
Utilize tight rock permeability unstable state determinator of the present utility model, can rapid and accurate determination low permeability reservoir core permeability, can realize two kinds of unstable state methods and measure low permeability cores sample permeabilities, simple to operate, test is accurately; Can regulate according to core porosity the size of import and export buffer container volume, to guarantee the precision of permeability determination.
The utility model also proposes one and utilizes above-mentioned tight rock permeability unstable state determinator to carry out rock permeability method for measuring, and described assay method comprises the following steps:
1) close all valves;
2) core sample is put into core holding unit 1, and loaded ring is pressed;
3) open cylinder 34, gas admittance valve 32 and pressure regulator valve 33, open the 3rd valve 73, the 4th valve 74 and the 5th valve 75 in verification loop, open the first valve 71 between core holding unit and import buffer container, regulate bleed pressure, load certain pressure at core holding unit 1 entrance point and endpiece, make gas infiltrate fast the flow in low permeability core in core holding unit; Record now pressure by inlet pressure sensor 31 and outlet pressure sensor 41;
4) after entrance point and endpiece pressure stability (that is: tensimeter registration is stable no longer changes), shifter cylinder, cuts out the 3rd valve 73, the 4th valve 74 and the 5th valve 75 in verification loop; Open atmospheric valve 42 and regulate pressure, core holding unit downstream pressure is declined, and lower than core holding unit upstream pressure, after adjusting pressure, close atmospheric valve 42 again, upstream pressure transmits to core holding unit downstream;
5) after the pressure equilibrium of core holding unit upstream and downstream (that is: when inlet pressure sensor 31 shows identical numerical value with outlet pressure sensor 41), according to upstream and downstream pressure change calculations core sample permeability.
In the present embodiment, the volume of verification cylinder 81 is known, can utilize the two chambers of Boyle law method to come verification import outbound buffer container and outlet outbound buffer volume of a container (utilizing verification loop 8 and verification cylinder 81 verification import outbound buffer containers and outlet outbound buffer volume of a container is prior art, does not repeat them here).
Utilize tight rock permeability unstable state determinator of the present utility model, can realize two kinds of unstable state methods and carry out the measurement of permeability.Can select diverse ways to carry out permeability test according to core sample factor of porosity size, when core porosity >3%, the transient pulse method of recommendations for selection unstable state method be tested; When core porosity is <3%, the pressure breakdown method of recommendations for selection unstable state method is tested.
The detailed process of two kinds of measuring methods is described below:
One, unstable state transient pulse method measurement core permeability is achieved in that
1) before experiment starts, all valves are in closed condition; 2) core sample is packed into core holding unit 1, loaded ring is pressed; 3) open cylinder 34, regulate pressure regulator valve 33 and gas admittance valve 32, open the 3rd valve 73, the 4th valve 74 and the 5th valve 75 in verification loop, open the first valve 71 between core holding unit and import buffer container, regulate bleed pressure, load certain pressure at core holding unit 1 entrance point and endpiece, make gas infiltrate fast the flow in low permeability core in core holding unit; Record now pressure by inlet pressure sensor 31 and outlet pressure sensor 41; 4) after inlet pressure sensor 31 and outlet pressure sensor 41 pressure registrations are stable, shifter cylinder, close the 3rd valve 73, the 4th valve 74 and the 5th valve 75 in verification loop, open after atmospheric valve 42 regulates pressure and close again atmospheric valve 42, open the second valve 72, inlet pressure sensor 31 and outlet pressure sensor 41 record respectively core holding unit import and the time dependent force value of top hole pressure simultaneously; 5) in the time that import and export pressure registration equates, obtain import and export pressure curve (as shown in Figure 2) over time, calculate the logarithm of core holding unit import and export pressure reduction variation and the slope (c) (as shown in Figure 3) of the relation of time; 6) by the core sample of formula (formula (D-20) of this simplified formula 6-57 in American core testing standard API-RP40) calculating below permeability K (10
-3μ m
2), wherein: μ is Experimental Flowing Object viscosity (mPa.s), L is sample length (cm), A is the long-pending (cm of sample in cross section
2), Pf is mean pressure (MPa), i.e. P
f=(P
in+ P
out)/2, P
infor intake pressure, P
outfor top hole pressure, V
infor porch connects the pipeline volume of buffer container and the volume sum (cm of buffer container 51
3), V
outfor exit connects the pipeline volume of buffer container and the volume sum (cm of buffer container 61
3); Described c value is the slope of Fig. 3 cathetus, and c value is Ln[△ P (t)]=Ln[P
in(t)-P
out(t)];
Two, unstable state pressure breakdown method mensuration core permeability is achieved in that
1) before experiment, all valves of test macro are in closed condition, 2) core sample is put into core holding unit 1, loaded ring is pressed, 3) open cylinder 34, regulate pressure regulator valve 33 and gas admittance valve 32, open the 3rd valve 73, the 4th valve 74 and the 5th valve 75 in verification loop, open the first valve 71 between core holding unit and import buffer container, regulate bleed pressure, load certain pressure at core holding unit 1 entrance point and endpiece, make gas infiltrate fast the flow in low permeability core in core holding unit, record now pressure by inlet pressure sensor 31 and outlet pressure sensor 41, 4) after entrance point and endpiece pressure stability (that is: tensimeter registration is stable no longer changes), shifter cylinder, close the 3rd valve 73 in verification loop, the 4th valve 74 and the 5th valve 75, open atmospheric valve 42 inlet pressure sensors 31 and record pressure change procedure, obtain the time dependent curve of inlet pressure, in the time that inlet pressure is reduced to atmospheric pressure, ask for the logarithm of this pressure and the slope of time-varying relationship (c), 5) by the core sample of formula (formula (B-23) of this simplified formula 6-54 in American core testing standard API-RP40) calculating below permeability K (10
-3μ m
2), wherein: μ is Experimental Flowing Object viscosity (mPa.s), L is sample length (cm), A is the long-pending (cm of sample in cross section
2), P
ffor mean pressure (MPa), V
infor the volume (cm of porch pipeline and buffer container 51
3).
In the present embodiment, while adopting unstable state method transient pulse method to carry out permeability survey, need to regulate the volume of import buffer container 51, outlet buffer container 61, measure requirement with accommodate sample; Adjustment process is: the volume of buffer container is known, calculates the size of buffer container volume by the solid steel block of the known volume of adding or take out.In the time adopting pressure breakdown method to measure permeability, only need to regulate the volume of import buffer container 51.Described import buffer container 51, outlet buffer container 61, all can, by dosing or take out solid steel block to change its size, make sample permeability determination accurate fast.
Utilize determinator of the present utility model to adopt unstable state method to carry out permeability test experiments to different aperture degree core sample, and repeatedly contrast with standard core sample, the testable flow in low permeability core lower limit of the utility model unstable state method can reach 0.00001mD; Determinator of the present utility model and method can realize the test request of measuring low permeability cores sample permeability.
From the above mentioned, utilize tight rock permeability unstable state determinator of the present utility model, can rapid and accurate determination low permeability reservoir core permeability, can realize two kinds of unstable state methods and measure low permeability cores sample permeabilities, simple to operate, test is accurately; Can regulate according to core porosity the size of import and export buffer container volume, to guarantee the precision of permeability determination.
The foregoing is only the schematic embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the modification under the prerequisite of design of the present utility model and principle, done, all should belong to the scope of the utility model protection.
Claims (5)
1. a tight rock permeability unstable state determinator, described determinator comprises a core holding unit for accommodating core sample, the sidewall of described core holding unit is connected in ring press pump by pipeline; The entrance point of described core holding unit is provided with inlet ductwork, and endpiece is provided with export pipeline; In described inlet ductwork, be sequentially provided with inlet pressure sensor, gas admittance valve, pressure regulator valve and cylinder; In described export pipeline, be sequentially provided with outlet pressure sensor and atmospheric valve; It is characterized in that: in described inlet ductwork and between core holding unit entrance point and inlet pressure sensor, be provided with an import buffer container by the first pipeline communication; In described export pipeline and between outlet port of rock core holder and outlet pressure sensor, be communicated with and be provided with an outlet buffer container by second pipe; Between described core holding unit entrance point and the first pipeline, be provided with the first valve; In described second pipe, be provided with the second valve; Be arranged in parallel a verification loop with core holding unit, in described verification loop, be provided with a verification cylinder, verification cylinder both sides are respectively equipped with the 3rd valve and the 4th valve, described verification loop input end is connected in the inlet ductwork between the first pipeline and the first valve, and described verification loop output terminal is connected in the export pipeline between second pipe and outlet port of rock core holder; Be arranged in parallel one the 5th valve with described verification cylinder.
2. tight rock permeability unstable state determinator as claimed in claim 1, is characterized in that: described import buffer container and outlet buffer container are made up of cylindric stainless steel sealed cylinder block respectively; Described sealed cylinder block is provided with the sealing cylinder cap that can dismantle; Cylindric solid steel block is selectively set in described cylinder body.
3. tight rock permeability unstable state determinator as claimed in claim 2, is characterized in that: in described import buffer container and outlet buffer container, multiple cylindric solid steel block are selectively set.
4. tight rock permeability unstable state determinator as claimed in claim 3, is characterized in that: the thickness of described each solid steel block is different; The diameter of each solid steel block is identical with the internal diameter of each buffer container.
5. tight rock permeability unstable state determinator as claimed in claim 4, is characterized in that: described core sample is the rock core drill string of diameter 2.54cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320755262.XU CN203630018U (en) | 2013-11-25 | 2013-11-25 | Unstable-state determination device for permeability of hyposmosis rock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320755262.XU CN203630018U (en) | 2013-11-25 | 2013-11-25 | Unstable-state determination device for permeability of hyposmosis rock |
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| CN201320755262.XU Expired - Fee Related CN203630018U (en) | 2013-11-25 | 2013-11-25 | Unstable-state determination device for permeability of hyposmosis rock |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103616322A (en) * | 2013-11-25 | 2014-03-05 | 中国石油天然气股份有限公司 | Non-steady state detection device and non-steady state detection method for permeability of low-permeability rock |
| CN104122187A (en) * | 2014-08-06 | 2014-10-29 | 海安华达石油仪器有限公司 | Ultra-low permeability measurer adopting sine pressure wave oscillation method |
| CN104237099A (en) * | 2014-08-29 | 2014-12-24 | 中国石油大学 | Device and method for determining radial permeability of compact rock core |
| CN104359819A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Device and method for determining gas-water relative permeability of low-infiltration dense rock core |
| CN105628587A (en) * | 2016-03-09 | 2016-06-01 | 西南石油大学 | Novel device and method for accurately measuring effective permeability of gas-water two phases |
| CN105699268A (en) * | 2016-02-24 | 2016-06-22 | 西南石油大学 | Measuring device for rock absolute permeability and usage thereof |
| CN105717025A (en) * | 2016-02-24 | 2016-06-29 | 西南石油大学 | Rock effective permeability testing device and using method thereof |
| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN108088778A (en) * | 2017-12-06 | 2018-05-29 | 中国科学院武汉岩土力学研究所 | A kind of rock type materials permeability, porosity testing device |
| CN110501276A (en) * | 2019-09-23 | 2019-11-26 | 西南石油大学 | A kind of measuring method for permeability saturation curve emulsification misalignment |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103616322A (en) * | 2013-11-25 | 2014-03-05 | 中国石油天然气股份有限公司 | Non-steady state detection device and non-steady state detection method for permeability of low-permeability rock |
| CN104122187B (en) * | 2014-08-06 | 2016-06-29 | 海安华达石油仪器有限公司 | Sine pressure wave succusion ultralow permeability analyzer |
| CN104122187A (en) * | 2014-08-06 | 2014-10-29 | 海安华达石油仪器有限公司 | Ultra-low permeability measurer adopting sine pressure wave oscillation method |
| CN104237099A (en) * | 2014-08-29 | 2014-12-24 | 中国石油大学 | Device and method for determining radial permeability of compact rock core |
| CN104359819A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Device and method for determining gas-water relative permeability of low-infiltration dense rock core |
| CN105699268A (en) * | 2016-02-24 | 2016-06-22 | 西南石油大学 | Measuring device for rock absolute permeability and usage thereof |
| CN105717025A (en) * | 2016-02-24 | 2016-06-29 | 西南石油大学 | Rock effective permeability testing device and using method thereof |
| CN105628587A (en) * | 2016-03-09 | 2016-06-01 | 西南石油大学 | Novel device and method for accurately measuring effective permeability of gas-water two phases |
| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN105842425B (en) * | 2016-05-23 | 2017-12-01 | 青岛中瑞泰软控科技股份有限公司 | A kind of core holding unit and dynamic filtration experimental provision |
| CN108088778A (en) * | 2017-12-06 | 2018-05-29 | 中国科学院武汉岩土力学研究所 | A kind of rock type materials permeability, porosity testing device |
| CN110501276A (en) * | 2019-09-23 | 2019-11-26 | 西南石油大学 | A kind of measuring method for permeability saturation curve emulsification misalignment |
| CN110501276B (en) * | 2019-09-23 | 2022-07-12 | 西南石油大学 | Method for determining emulsification misalignment of relative permeability curve |
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Granted publication date: 20140604 Termination date: 20211125 |