CN104481521B - A kind of rock core sealing leak testing process - Google Patents
A kind of rock core sealing leak testing process Download PDFInfo
- Publication number
- CN104481521B CN104481521B CN201410601816.XA CN201410601816A CN104481521B CN 104481521 B CN104481521 B CN 104481521B CN 201410601816 A CN201410601816 A CN 201410601816A CN 104481521 B CN104481521 B CN 104481521B
- Authority
- CN
- China
- Prior art keywords
- lead pipe
- holding unit
- core holding
- high pressure
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011435 rock Substances 0.000 title claims abstract description 36
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000002085 persistent effect Effects 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to oil development experimental technique field, specifically a kind of rock core seals leak testing process.The present invention is realized by following steps: (1) the installation connection valve on the outer tube wall of core holding unit, and by connection valve, high pressure resistant pipeline, core holding unit is connect with high pressure gas cylinder；The port valve of core holding unit two sides is respectively connected to different aerometer meters by high pressure resistant pipeline；(2) rock core is fitted into lead pipe, and lead pipe is fixed in the cavity of core holding unit by lead pipe both ends plug；(3) valve for opening connection valve and high pressure gas cylinder examines the sealing performance of lead pipe to the annular space persistent pressure between core holding unit and lead pipe；(4) core holding unit two sides valve is opened, by observing the changes in flow rate of aerometer meter, judges lead pipe sealing state.If lead pipe re-replaces lead pipe there are leakage phenomenon, and examines again by above-mentioned steps, until determining that lead pipe leakproofness is good.
Description
Technical field
Rock core the present invention relates to oil development experimental technique field, in specifically a kind of laboratory core displacement test
Seal leak testing process.
Background technique
Currently, rock core sealing is one and closes very much when carrying out high temperature and pressure rock core displacement test in oil development laboratory
The problem of key, there are mainly two types of methods for rock core sealing, and one is traditional gum cover Sealing Methods, although gum cover leakproofness is preferable,
It is made of gum cover by organic chemical, temperature tolerance is poor, is only used in stratum simulated experiment of the temperature lower than 120 DEG C；It is another
Kind is the lead pipe Sealing Method suitable for high temperature and pressure oil reservoir, and application No. is 201310029801.6 patent applications, disclose one
Kind of lead pipe Sealing Method, because its high temperature resistant, expense be low etc., advantages are increasingly taken seriously.But when lead pipe seals, rock core is directly from one
End is packed into lead pipe, and since lead pipe elasticity is small, rock core and lead pipe easily have gap, is not easy disposably to seal, therefore, is doing rock core drive
When for experiment, easily causes rock core in lead pipe to be contaminated because of water inlet, often scrap rock core when seriously polluted.In petroleum industry
Rock core used is obtained by special core hole, and core hole itself is costly, and using post-production, every piece of rock core cost is high
It holds high and is different from, if rock core is scrapped, because of the irreplaceability of rock core, loss is not only rock core, the displacement test of rock core
It can not carry out, related geologic information and parameter can not obtain, the loss that can not retrieve generation to the exploitation in entire oil field.
Summary of the invention
Object of the present invention is to be not easy disposably to seal for lead pipe, it is also easy to produce leakage when testing, causes rock core water inlet dirty
The problem of dye, provides a kind of method for carrying out rock core sealing leak test using high pressure gas.
The purpose of the present invention is what is realized by following steps:
1, the installation connection valve on the outer tube wall of core holding unit, and valve, high pressure resistant pipeline are connected to by it, by rock
Heart clamp holder is connect with high pressure gas cylinder；The port valve of core holding unit two sides is respectively connected to difference by high pressure resistant pipeline
Aerometer meter；
2, whole after arranging one group of rock core to be fitted into lead pipe, and lead pipe is fixed to by rock by the plug at lead pipe both ends
In the cavity of heart clamp holder；
3, the valve for opening connection valve and high pressure gas cylinder, to the annular space persistent pressure between core holding unit and lead pipe,
Examine the sealing performance of lead pipe；
4, core holding unit two sides valve is opened, by observing the changes in flow rate situation of aerometer meter, that is, can determine whether lead
Seal of tube state.
If gas flow does not increase in the aerometer meter at core holding unit both ends in a long time, judge that lead pipe seals
Well；If gas increases in the aerometer meter of any one end of core holding unit, illustrate that one end of its corresponding lead pipe exists
Leakage phenomenon, need to be to lead pipe into inspection.If lead pipe re-replaces lead pipe there are damaging problem, and again right by above-mentioned steps
The test of its being sealed property is prevented until just high temperature and pressure rock core displacement test can be carried out to it after determining that lead pipe leakproofness is good
Only rock core scraps the generation of accident.
The leak test is high-pressure nitrogen bottle with high pressure gas cylinder.
The present invention is to carry out high temperature and pressure displacement test on the basis of the lead pipe for sealing rock core is sealed inspection, can
Effectively rock core is avoided to scrap, save experimental period, save experimental cost, improved experiment success rate, provided reliably for oil field development
Technical support.
Detailed description of the invention
Fig. 1 is instrument and equipment connection schematic diagram used in the present invention；
Fig. 2 is core holding unit cross-sectional view used in the present invention.
Specific embodiment
In conjunction with attached drawing, the present invention is described in detail:
The present invention a kind of rock core sealing leak testing process, referring to Fig. 1 and Fig. 2, the leak testing process are provided the following steps are included:
1, the installation connection valve 11 on the outer tube wall of core holding unit 1, and valve 11, high pressure resistant pipe are connected to by it
Core holding unit 1 is connect by line with high pressure gas cylinder 2；The port valve 5,10 of core holding unit two sides passes through high pressure resistant pipeline point
It is not connected to aerometer meter 3,4；
2, whole after arranging one group of rock core 9 to be fitted into lead pipe 7, and pass through the plug 12,13 at 7 both ends of lead pipe for lead pipe
7 are fixed in the cavity of core holding unit 1；
3, the valve 6 for opening connection valve 11 and high pressure gas cylinder 2, holds the annular space 8 between core holding unit 1 and lead pipe 7
Continuous pressurization, examines the sealing performance of lead pipe 7；
4,1 two sides valve 5,10 of core holding unit is opened, by observing the changes in flow rate situation of aerometer meter 3,4, i.e.,
It can determine whether 7 sealing state of lead pipe.
If gas flow does not increase in the aerometer meter 3,4 at 1 both ends of core holding unit in a long time, lead is judged
7 good seal of pipe；If gas increases in the aerometer meter 3,4 of any one end of core holding unit 1, illustrate its corresponding lead
It one end of pipe 7, need to be to lead pipe 7 into inspection there are leakage phenomenon.If there are damaging problems for lead pipe 7, lead pipe 7 is re-replaced, and
Its being sealed property is tested again by above-mentioned steps, until after determining that 7 leakproofness of lead pipe is good just high temperature height can be carried out to it
Rock core displacement test is pressed, prevents rock core from scrapping the generation of accident.
The leak test high pressure gas cylinder 2 is high-pressure nitrogen bottle.
Claims (2)
1. a kind of rock core seals leak testing process, rock core is sealed in lead pipe, it is characterized in that the following steps are included:
(1) installation connection valve (11) on the outer tube wall of core holding unit (1), and pass through its connection valve (11), high pressure resistant
Core holding unit (1) is connect by pipeline with high pressure gas cylinder (2)；The port valve (5,10) of core holding unit two sides, passes through resistance to height
Pressure pipeline is respectively connected to aerometer meter (3,4)；
(2) whole after arranging one group of rock core (9) to be fitted into lead pipe (7), and pass through the plug (12,13) at lead pipe (7) both ends
Lead pipe (7) are fixed in the cavity of core holding unit (1)；
(3) valve (6) for opening connection valve (11) and high pressure gas cylinder (2), between core holding unit (1) and lead pipe (7)
Annular space (8) persistent pressure examines the sealing performance of lead pipe (7)；
(4) core holding unit (1) two sides valve (5,10) are opened, the annular space between core holding unit (1) and lead pipe (7) passes through gas
High pressure resistant pipeline between body quantifier and core holding unit is connected to aerometer meter, by observing aerometer meter (3,4)
Changes in flow rate situation, that is, can determine whether lead pipe (7) sealing state.
2. rock core according to claim 1 seals leak testing process, it is characterized in that: the leak test is with high pressure gas cylinder (2)
High-pressure nitrogen bottle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601816.XA CN104481521B (en) | 2014-10-31 | 2014-10-31 | A kind of rock core sealing leak testing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601816.XA CN104481521B (en) | 2014-10-31 | 2014-10-31 | A kind of rock core sealing leak testing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104481521A CN104481521A (en) | 2015-04-01 |
| CN104481521B true CN104481521B (en) | 2019-06-25 |
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ID=52756113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410601816.XA Active CN104481521B (en) | 2014-10-31 | 2014-10-31 | A kind of rock core sealing leak testing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104481521B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332679B (en) * | 2015-11-26 | 2018-02-02 | 东北石油大学 | A kind of laboratory core realizes the physical simulating method of thermal process |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201532351U (en) * | 2009-11-13 | 2010-07-21 | 中国科学院武汉岩土力学研究所 | Device for utilizing variable-volume pressure pulse method to test gas permeation coefficients of rocks |
| CN201654010U (en) * | 2009-08-28 | 2010-11-24 | 西安石油大学 | Plugging tester |
| CN201908653U (en) * | 2010-12-17 | 2011-07-27 | 中国石油天然气股份有限公司 | CT scanning heterogeneous model test system |
| CN102435537A (en) * | 2011-11-21 | 2012-05-02 | 中国石油大学(华东) | Coal petrography rock core gas permeability measuring device |
| CN103114849A (en) * | 2013-01-25 | 2013-05-22 | 中国石油天然气股份有限公司 | Core sealing device and sealing method thereof |
| CN103485672A (en) * | 2012-06-15 | 2014-01-01 | 福建奋安铝业有限公司 | Multifunctional casement window |
| CN203658351U (en) * | 2013-12-16 | 2014-06-18 | 何小兵 | Core wafer clamp holder |
| CN103940717A (en) * | 2014-03-19 | 2014-07-23 | 中国海洋石油总公司 | Experimental evaluation device of high temperature high pressure steam on rock core pollution |
| CN103940720A (en) * | 2014-04-18 | 2014-07-23 | 西南石油大学 | Ultrahigh pressure sealing core holder capable of pressurizing step by step |
| CN103954544A (en) * | 2014-05-13 | 2014-07-30 | 中国石油大学(北京) | Experimental device and method for estimating water-controlling and air-intake effects of polymer |
-
2014
- 2014-10-31 CN CN201410601816.XA patent/CN104481521B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201654010U (en) * | 2009-08-28 | 2010-11-24 | 西安石油大学 | Plugging tester |
| CN201532351U (en) * | 2009-11-13 | 2010-07-21 | 中国科学院武汉岩土力学研究所 | Device for utilizing variable-volume pressure pulse method to test gas permeation coefficients of rocks |
| CN201908653U (en) * | 2010-12-17 | 2011-07-27 | 中国石油天然气股份有限公司 | CT scanning heterogeneous model test system |
| CN102435537A (en) * | 2011-11-21 | 2012-05-02 | 中国石油大学(华东) | Coal petrography rock core gas permeability measuring device |
| CN103485672A (en) * | 2012-06-15 | 2014-01-01 | 福建奋安铝业有限公司 | Multifunctional casement window |
| CN103114849A (en) * | 2013-01-25 | 2013-05-22 | 中国石油天然气股份有限公司 | Core sealing device and sealing method thereof |
| CN203658351U (en) * | 2013-12-16 | 2014-06-18 | 何小兵 | Core wafer clamp holder |
| CN103940717A (en) * | 2014-03-19 | 2014-07-23 | 中国海洋石油总公司 | Experimental evaluation device of high temperature high pressure steam on rock core pollution |
| CN103940720A (en) * | 2014-04-18 | 2014-07-23 | 西南石油大学 | Ultrahigh pressure sealing core holder capable of pressurizing step by step |
| CN103954544A (en) * | 2014-05-13 | 2014-07-30 | 中国石油大学(北京) | Experimental device and method for estimating water-controlling and air-intake effects of polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104481521A (en) | 2015-04-01 |
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