CN102109457B - Method for in-series test of rock-core permeability - Google Patents
Method for in-series test of rock-core permeability Download PDFInfo
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- CN102109457B CN102109457B CN2011100257996A CN201110025799A CN102109457B CN 102109457 B CN102109457 B CN 102109457B CN 2011100257996 A CN2011100257996 A CN 2011100257996A CN 201110025799 A CN201110025799 A CN 201110025799A CN 102109457 B CN102109457 B CN 102109457B
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- permeability
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- rock core
- rock
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Abstract
The invention relates to a method for in-series test of rock-core permeability. When the rock core with higher permeability is tested, two rock cores with same diameters and equal section areas are arranged in a rock core holder in series, the permeability of one rock core is known, and the permeability of the other rock core needs to be tested, the sum of the total permeability after in-series connection is not more than the range upper limit of the existing permeability measuring instrument, and the rock-core permeability more than the range upper limit of the existing permeability measuring instrument is measured by utilizing the existing permeability measuring instrument. In the method, reliable permeability data is provided for making a development scheme for an oil field, and the requirement of rolling development in the oil field is met.
Description
Technical field
The present invention relates to a kind of method of the testing rock core permeability of connecting, solve the problem that existing permeability survey appearance exists can't accurately measuring above the rock core of the permeability survey appearance range upper limit.
Background technology
The core permeability measurement is a kind of basic test project of oil geology technical field; Generally all be core permeability to be tested with the permeability survey appearance; Measuring accuracy significantly reduces but the permeability survey appearance is exceeding on its permeability survey range in limited time, just can't accurately survey the size of core permeability to the rock core that exceeds the permeability survey appearance range upper limit, influences the level of the formulation of oilfield development program; Can bring serious economy loss to the field exploitation; It is big to develop new core permeability measuring instrument difficulty, and the time is long, can not satisfy the needs of the rolling development in oil field.
Summary of the invention
The object of the present invention is to provide a kind of method of the testing rock core permeability of connecting, solve the problem that existing permeability survey appearance can not accurately be measured the core permeability that exceeds its range upper limit.
Technical scheme of the present invention realizes in the following manner:
When the very high rock core of test permeability with two with section of diameter the long-pending rock core series connection that equates pack in the core holding unit; The rock core of a known permeability; Another is the rock core of tested permeability; Make the summation of the total permeability after the series connection be no more than the range upper limit of existing permeability survey appearance, utilize existing permeability survey appearance to measure the core permeability that permeability exceeds the existing permeability survey appearance range upper limit;
A, the length of measuring the rock core of known permeability, diameter, sectional area and permeability;
B, the length of measuring tested permeability rock core, diameter, sectional area require diameter and sectional area to equal the core diameter and the sectional area of known permeability;
C, measure total permeability of the rock core and the tested permeability rock core of known permeability; The permeability of known permeability rock core is measured in advance.
D, equate according to the flow of the fluid of the rock core of rock core that flows through known permeability successively and tested permeability; Total pressure head equals the pressure reduction sum of above-mentioned two rock cores; Total length equals above-mentioned two rock core length sums, utilizes Darcy formula to derive the following formula that calculates tested permeability:
After the simplification:
In the formula: A---core section is long-pending
Q---fluid flow
μ---liquid viscosity
L
Not---rock core length to be measured
L
---known rock core length
L
Always---series connection back rock core total length
K
Not---core permeability to be measured
K
---known core permeability
K
Always---the total permeability of series connection back rock core
Owing to remove K in the formula
NotOuter other parameters are all known, so promptly can calculate core permeability to be measured according to formula (2).
The present invention need not develop new permeability survey appearance, has satisfied the needs of oil field rolling development formulation development plan, for development plan provides reliable core permeability data.Solved existing core permeability measuring instrument inaccurate problem has been shown in the core permeability survey that exceeds its range upper limit.
Description of drawings
No accompanying drawing
Embodiment
For further disclosing technical scheme of the present invention, elaborate through embodiment below:
When the very high rock core of test permeability with two with section of diameter the long-pending rock core series connection that equates pack in the core holding unit; The rock core of a known permeability; Another is the rock core of tested permeability; Make total permeability after the series connection be no more than the range upper limit of existing permeability survey appearance, utilize existing permeability survey appearance to measure the core permeability that permeability exceeds the existing permeability survey appearance range upper limit;
A, the length of measuring the rock core of known permeability, diameter, sectional area and permeability;
B, the length of measuring tested permeability rock core, diameter, sectional area require diameter and sectional area to equal the core diameter and the sectional area of known permeability;
Total permeability of the rock core of c, the rock core of measuring known permeability and tested permeability;
D, equate according to the flow of the fluid of the rock core of rock core that flows through known permeability successively and tested permeability; Total pressure head equals the pressure reduction sum of above-mentioned two rock cores; Total length equals above-mentioned two rock core length sums, utilizes Darcy formula to derive the following formula that calculates tested permeability:
After the simplification:
In the formula: A---core section is long-pending
Q---fluid flow
μ---liquid viscosity
L
Not---rock core length to be measured
L
---known rock core length
L
Always---series connection back rock core total length
K
Not---core permeability to be measured
K
---known core permeability
K
Always---the total permeability of series connection back rock core
Since in the formula except that K not other parameters all known, so promptly can calculate core permeability to be measured according to formula (2).
Calculated examples
1, a core permeability is known as 126 * 10
-3μ m
2, diameter 25.4mm, length 27mm;
A core permeability the unknown, diameter 25.4mm, length 25mm;
2, the series connection of two blocks of rock cores is put into permeameter and is measured, total permeability be 241 * 10
-3μ m
2
3, above parameter substitution formula is calculated
Claims (1)
1. method of testing rock core permeability of connecting; When the very high rock core of test permeability with two with section of diameter the long-pending rock core series connection that equates pack in the core holding unit; The rock core of a known permeability; Another is the rock core of tested permeability, makes total permeability after the series connection be no more than the range upper limit of existing permeability survey appearance, utilizes existing permeability survey appearance to measure the core permeability that permeability exceeds the existing permeability survey appearance range upper limit;
A, the length of measuring the rock core of known permeability, diameter, sectional area and permeability;
B, the length of measuring tested permeability rock core, diameter, sectional area make diameter and sectional area equal the core diameter and the sectional area of known permeability;
Total permeability of the rock core of c, the rock core of measuring known permeability and tested permeability;
D, equate according to the flow of the fluid of the rock core of rock core that flows through known permeability successively and tested permeability; Total pressure head equals the pressure reduction sum of above-mentioned two rock cores; Total length equals above-mentioned two rock core length sums, utilizes Darcy formula to derive the following formula of the permeability of the rock core that calculates tested permeability:
After the simplification:
In the formula: A---core section is long-pending
Q---fluid flow
μ---liquid viscosity
L
Not---rock core length to be measured
L
---known permeability rock core length
L
Always---series connection back rock core total length
K
Not---core permeability to be measured
K
---known permeability core permeability
K
Always---the total permeability of series connection back rock core
Owing to remove K in the formula
NotOuter other parameters are all known, so promptly can calculate core permeability to be measured according to formula (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100257996A CN102109457B (en) | 2011-01-20 | 2011-01-20 | Method for in-series test of rock-core permeability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100257996A CN102109457B (en) | 2011-01-20 | 2011-01-20 | Method for in-series test of rock-core permeability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102109457A CN102109457A (en) | 2011-06-29 |
| CN102109457B true CN102109457B (en) | 2012-11-14 |
Family
ID=44173674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100257996A Expired - Fee Related CN102109457B (en) | 2011-01-20 | 2011-01-20 | Method for in-series test of rock-core permeability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102109457B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237101B (en) * | 2014-09-18 | 2017-05-10 | 中国石油大学(华东) | Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device |
| CN107525754A (en) * | 2017-08-21 | 2017-12-29 | 浙江海洋大学 | Storage tank reservoir area terrace antiseepage formula soil osmotic coefficient investigating method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4868751A (en) * | 1987-09-11 | 1989-09-19 | Mobil Oil Corporation | Method for determining relative permeability of a subterranean reservoir |
| CN1103165A (en) * | 1993-11-20 | 1995-05-31 | 大庆石油管理局勘探开发研究院 | Automatic measuring instrument for permeability of rock core |
| US5844136A (en) * | 1996-01-24 | 1998-12-01 | Agip S.P.A. | Device for measuring the permeability of rock fragments |
| CN101813689A (en) * | 2010-03-30 | 2010-08-25 | 廊坊中石油科学技术研究院 | Serial-parallel experimental device capable of simulating nonuniformity multiple permeable layer stratum |
-
2011
- 2011-01-20 CN CN2011100257996A patent/CN102109457B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4868751A (en) * | 1987-09-11 | 1989-09-19 | Mobil Oil Corporation | Method for determining relative permeability of a subterranean reservoir |
| CN1103165A (en) * | 1993-11-20 | 1995-05-31 | 大庆石油管理局勘探开发研究院 | Automatic measuring instrument for permeability of rock core |
| US5844136A (en) * | 1996-01-24 | 1998-12-01 | Agip S.P.A. | Device for measuring the permeability of rock fragments |
| CN101813689A (en) * | 2010-03-30 | 2010-08-25 | 廊坊中石油科学技术研究院 | Serial-parallel experimental device capable of simulating nonuniformity multiple permeable layer stratum |
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| Publication number | Publication date |
|---|---|
| CN102109457A (en) | 2011-06-29 |
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