CN104237101B - Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device - Google Patents
Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device Download PDFInfo
- Publication number
- CN104237101B CN104237101B CN201410477803.6A CN201410477803A CN104237101B CN 104237101 B CN104237101 B CN 104237101B CN 201410477803 A CN201410477803 A CN 201410477803A CN 104237101 B CN104237101 B CN 104237101B
- Authority
- CN
- China
- Prior art keywords
- core
- permeability
- rock core
- rock
- holding unit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a bridge imitation and flow measurement avoidance type cross rock core permeability measurement device and method. The disclosed measurement device needs four rock core holding units and a differential pressure gauge, and the four rock core holding units and the differential pressure gauge are assembled by a plurality of conduits and four tees in a Wheatstone bridge imitation manner. The disclosed measurement method comprises four steps as follows: step one, standard rock cores are selected for the rock core holding units on two proportional arms and the rock core holding unit on a comparison arm; step two, a displacement experiment is performed and comprises the steps that the measurement device is assembled, the rock cores are mounted in the rock core holding units, and ring crush compression is applied, and a pressure pump performs pressing; step three, permeability of the standard rock cores in the rock core holding unit on the comparison arm is adjusted, and a pointer of the differential pressure gauge points to zero; and step four, data processing is performed, and related measurement data is substituted to an assigned data formula for calculating the rock core permeability. Compared with a traditional steady flow method for rock core permeability measurement, the technology can realize the rock core permeability measurement without flow measurement.
Description
Technical field
The present invention relates to a kind of permeability survey technology, more particularly to a kind of imitative electric bridge exempts from measurement of discharge formula core permeability
Across level measurement apparatus and imitative electric bridge exempt from across the level measuring method of measurement of discharge formula core permeability.
Background technology
In traditional steady state flow method measurement core permeability experiment, an accurate measurement often difficult point of flow, especially
It is during hypotonic, special hypotonic, compact rock core displacement test, or displacement environment it is harsher when, the certainty of measurement of flow
More it is difficult to ensure that, or even cannot measure sometimes there is larger error or nothing so as to cause the isoparametric measurement of core permeability
Method is measured.The such as measure of compact reservoir rock permeability, its fluid flow is very small, for permeability is 1 × 10-3μm2
Standard rock core, when displacement pressure is up to 40MPa, flow is only 0.8ml/min or so (hypothesis liquid be distilled water)；Work as rock
When heart permeability is lower, flow will be more small, flowmeter general at present, such as electromagnetic flowmeter, turbine flowmeter, quality stream
Gauge etc., all cannot apply because range is excessive.Again under such as HTHP, the especially presence of high temperature so that rock core displacement
During displace fluid and there is gas-liquid two-phase, displace directly measured using open little graduated cylinder more than fluid at present, such gas phase is caught
Obtaining and measuring just cannot realize；In addition at high temperature, liquid is volatile, thus the metering of liquid also error is larger.
The rock core displacement test device of measurement core permeability, such as FS-II types cover pressure hole and ooze analyzer, typically by single
Core holding unit, and the composition such as compression pump, pressure gauge and pipe valve, and these rock core displacement test devices all include metering
System, i.e., including various flowmeters.
The final measurement object of rock core displacement test is permeability, and fluid flow is middle measurement physical quantity, due to
Presently relevant flow measurement problem is difficult to solve, therefore how to avoid being realized to permeability on the premise of measuring fluid flow
Measurement, and certain certainty of measurement is can guarantee that, it is the problem that those skilled in the art need to solve.
The content of the invention
It is an object of the invention to provide a kind of core permeability measurement apparatus, the device need not measure fluid flow can
The measurement to core permeability is realized, and can guarantee that certain certainty of measurement.Above-mentioned core permeability measurement apparatus are being provided
On the basis of, a kind of core permeability measuring method is also provided.
The imitative electric bridge that the present invention is provided is exempted from across the level measurement apparatus of measurement of discharge formula core permeability and uses dealing rock core including one
The compression pump of injection displacing fluid in clamper, a differential manometer for indicating whether 2 pressure to be measured balances, one is used for collecting
Displace the container of fluid, four core holding units, four threeways and a plurality of conduit for connecting each part mentioned above.Wherein four
Core holding unit and a differential manometer copy Wheatstone bridge mode to couple together by threeway and conduit, are in two ratio arms
On core holding unit the inside place permeability known to standard rock core, compare standard rock core in the core holding unit on arm
Permeability is adjustable, to measure be used in the core holding unit on arm and places rock core to be measured, and differential manometer is connected on " bridge " by conduit.
Compression pump is connected by conduit with one end of Article 2 diagonal (non-" bridge " road), and collection vessel is diagonal with Article 2 by conduit
The other end of line is connected.
The present invention also provides a kind of imitative electric bridge and exempts from across the level measuring method of measurement of discharge formula core permeability：First according to rock to be measured
The estimate of heart permeability is the core holding unit on two ratio arms and the core holding unit selection standard rock core compared on arm；
Then copy Wheatstone bridge to assemble measurement apparatus, four blocks of rock cores be individually placed in four core holding units, and apply ring pressure,
Opening pressure pump is suppressed, and carries out displacement test, is displaced fluid and is flowed into collection vessel；In displacement process, constantly adjustment is compared on arm
The permeability of the standard rock core in core holding unit so that differential manometer pointer nulling, i.e., 2 pressure to be measured reaches balance；Finally
Compare the core permeability on arm in core holding unit during by balance, and the rock core on two ratio arms in core holding unit oozes
Thoroughly rate substitutes into the permeability that formula is calculated rock core to be measured.
It is preferred that two ratio arms and three rock cores compared on arm be permeability survey precision it is higher in ooze sandstone, it oozes
Thoroughly rate magnitude range is 50～500 × 10-3μm2。
It is preferred that changing the permeability of its built-in rock core by adjusting the ring pressure for comparing core holding unit on arm.
Description of the drawings
Fig. 1 is that the imitative electric bridge of the present invention exempts from structural representation of the measurement of discharge formula core permeability across level measurement apparatus；(see Fig. 1)
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail with specific embodiment：
One embodiment, it is assumed that three standard rock cores are identical with the geometry and size of rock core to be measured, and
Four blocks of rock cores ooze sandstone in being, and its permeability magnitude range is 50～500 × 10-3μm2, it is further assumed that parallel with measurement arm
Ratio arms in core holding unit 4 permeability of rock core be K1, rock in core holding unit 5 on the ratio arms parallel with arm is compared
The permeability of the heart is K2, the permeability of rock core to be measured is KX, during 7 pointer nulling of differential manometer, compare on arm rock in core holding unit 9
The permeability of the heart is K3.Can derive that the relation between four core permeabilities is by Darcy's law：KX=(K2/K1)K3, the public affairs
Formula shows, in 7 pointer nulling of differential manometer, i.e., when the two ends pressure of differential manometer 7 reaches balance, it is known that the infiltration of three standard rock cores
Rate K1、K2、K3Permeability K of rock core to be measured can be calculatedX。
Core permeability K to be measuredXConcrete measurement process it is as follows：
Step 1：Choose the equal (K of permeability1=K2) two pieces in ooze sandstone as core holding unit on two ratio arms 4,5
In standard rock core, choose permeability size and core permeability K to be measured3Sandstone is oozed in quite and is pressed from both sides as rock core on arm is compared
Standard rock core in holder 9；
Step 2：The mode of Wheatstone bridge is copied, using multiple catheters 2 and four threeways 3,6,8,11 by four rock cores
Clamper 4,5,9,10 and a differential manometer 7 combine, and further differential manometer 7 are connected on " bridge " by conduit 2, will press
Power pump 1 is connected with the cornerwise one end of Article 2, the cornerwise other end of collection vessel 12 and Article 2 is connected, so as to set up
Play imitative electric bridge and exempt from across the level measurement apparatus of measurement of discharge formula core permeability, then four blocks of rock cores are individually placed to into four core holding units
4th, in 5,9,10, to four core holding units 4,5,9,10 plus ring pressure, Opening pressure pump 1 is suppressed, and carries out displacement test, displaces stream
Body flows into collection vessel 12；
Step 3：Constantly regulate compares the ring pressure of core holding unit 9 on arm, and then changes the permeability of its built-in rock core, makes
The pointer nulling of differential manometer 7 is obtained, i.e., 2 pressure to be measured reaches balance；
Step 4：By the core permeability K in core holding unit 9 on comparison arm during balance3, and on two ratio arms
Core permeability K in core holding unit 4,51And K2Substitute into formula KX=(K2/K1)K3, it is calculated the permeability of rock core to be measured
KX。
Second embodiment, except assuming that rock core to be measured is that (permeability magnitude range is 10～50 × 10 to low permeability cores-3μ
m2) outward, other hypothesis are identical with one embodiment.In 7 pointer nulling of differential manometer, the pass between four core permeabilities
It is KX=(K2/K1)K3Still set up, now measure permeability K of rock core to be measuredXDetailed process and one embodiment in phase
Seemingly, being slightly different part is, is the permeability for oozing sandstone on two ratio arms in core holding unit 4,5 in selection in step 1
It is no longer equal, the ratio K of its two permeability2/K1Between 0.1～0.5, and it is further assumed that ooze in core holding unit 9
The permeability of sandstone is 100 × 10-3μm2, permeability K of sandstone will be oozed in above-mentioned three pieces1、K2And K3Substitute into formula KX=(K2/
K1)K3, then calculated core permeability size to be measured is between 10～50 × 10-3μm2Between, show that rock core to be measured is hypotonic
Rock core, so as to illustrate the technology be capable of achieving using permeability survey precision it is higher in ooze sandstone to measure oozing for low permeability cores
Saturating rate.
Further analysis understands, when the ratio of the permeability that sandstone is oozed in selection in core holding unit 4,5 on two ratio arms
Value K2/K1When between 5～10, by formula KX=(K2/K1)K3Calculated core permeability size to be measured is between 500
～1000 × 10-3μm2Between, it is high permeability rock core.
Summarize understand, the technology be capable of achieving using permeability survey precision it is higher in ooze sandstone measure low permeability cores and
The permeability of hypertonic rock core, you can carry out across the level measurement of core permeability.
Claims (4)
1. a kind of core permeability measurement apparatus, including one with inject in dealing core holding unit displacing fluid compression pump (1),
One is used for collecting collection vessel (12), multiple catheters (2) and four threeways (3,6,8,11) for displacing fluid, and its feature exists
In it also indicates whether 2 pressure to be measured puts down including four core holding units (4,5,9,10) for being used for built-in rock core, one
The differential manometer (7) of weighing apparatus, four core holding units (4,5,9,10) and a differential manometer (7) copy the mode of Wheatstone bridge to pass through
Multiple catheters (2) and four threeways (3,6,8,11) combine, core holding unit (the 4,5) the inside being on two ratio arms
Standard rock core known to placing permeability, compares and place in the core holding unit (9) on arm the adjustable standard rock core of permeability, surveys
It is used for placing rock core to be measured in core holding unit (10) on amount arm, differential manometer (7) is connected on " bridge " by conduit (2), pressure
Power pump (1) is connected by conduit (2) with the cornerwise one end of Article 2, and collection vessel (12) is by conduit (2) and Article 2 pair
The other end of linea angulata is connected.
2. core permeability measurement apparatus as claimed in claim 1, it is characterised in that compare core holding unit on arm (9)
Ring pressure is adjustable.
3. the method that the core permeability measurement apparatus described in a kind of utilization claim 1 measure core permeability, its feature exists
In comprising the steps：
Step 1：According to the estimate of core permeability to be measured it is core holding unit (4,5) on two ratio arms and compares on arm
Core holding unit (9) selection standard rock core；
Step 2：Four blocks of rock cores are individually placed to four rock core folders by the core permeability measurement apparatus described in assembling claim 1
In holder (4,5,9,10), and add ring pressure, Opening pressure pump (1) to suppress, carry out displacement test, displace fluid and flow into collection vessel
(12)；
Step 3：The permeability of the standard rock core in core holding unit on arm (9) is compared in adjustment so that differential manometer (7) pointer refers to
Zero, i.e., 2 pressure to be measured reaches balance；
Step 4：By rock core folder on the core permeability and two ratio arms in core holding unit (9) on comparison arm during balance
Core permeability in holder (4,5) substitutes into the permeability that formula is calculated rock core to be measured.
4. the method for measuring core permeability as claimed in claim 3, it is characterised in that in described step 3, by adjusting
The ring pressure of core holding unit (9) is changing the permeability of its built-in rock core relatively on arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477803.6A CN104237101B (en) | 2014-09-18 | 2014-09-18 | Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477803.6A CN104237101B (en) | 2014-09-18 | 2014-09-18 | Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104237101A CN104237101A (en) | 2014-12-24 |
| CN104237101B true CN104237101B (en) | 2017-05-10 |
Family
ID=52225611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410477803.6A Expired - Fee Related CN104237101B (en) | 2014-09-18 | 2014-09-18 | Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104237101B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677775A (en) * | 2015-02-06 | 2015-06-03 | 李年银 | Methods for testing performance of removing barium/strontium precipitate and influences on core permeability of chelating agent solution containing organic alkali |
| CN104990849B (en) * | 2015-07-20 | 2017-07-28 | 中国海洋石油总公司 | A kind of extra large pipe silt carrying capacity on-Line Monitor Device of the oil gas based on bridge balance and method |
| CN117330475A (en) * | 2023-10-10 | 2024-01-02 | 中国石油大学(北京) | Pressure drop measuring device and method for determining permeability of hypotonic core |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065936A (en) * | 1991-04-16 | 1992-11-04 | 四川石油管理局地质勘探开发研究院 | Core gas permeameter |
| JP3845055B2 (en) * | 2002-11-08 | 2006-11-15 | 株式会社東洋精機製作所 | Gas permeability measuring device |
| CN2679651Y (en) * | 2004-02-23 | 2005-02-16 | 吴正平 | Insertion liquid (gas) bridge modular |
| CN2872359Y (en) * | 2006-03-06 | 2007-02-21 | 赵江青 | Array semi-penetrating dummy hollow-billet pressure-resistance combined inspector |
| CN201242522Y (en) * | 2008-07-31 | 2009-05-20 | 中国石油天然气股份有限公司 | Measuring device suitable for hypotonic extra-hypotonic rock core porosity |
| CN101487540B (en) * | 2008-12-30 | 2011-11-09 | 中国矿业大学(北京) | Constant-pressure valve and seepage flow experiment system |
| CN102109457B (en) * | 2011-01-20 | 2012-11-14 | 青岛石大石仪科技有限责任公司 | Method for in-series test of rock-core permeability |
| CN103743661A (en) * | 2014-01-13 | 2014-04-23 | 中国石油天然气股份有限公司 | rock permeability testing device |
| CN103868841B (en) * | 2014-03-28 | 2016-03-02 | 海安县石油科研仪器有限公司 | Measure the experimental provision of extremely low mud shale permeability and membrane efficiency |
-
2014
- 2014-09-18 CN CN201410477803.6A patent/CN104237101B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104237101A (en) | 2014-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203658217U (en) | Seepage starting pressure gradient test device | |
| CN104568694B (en) | Method for testing gas-water relative permeability of dense core | |
| CN108896599B (en) | System and method for testing gas-water relative permeability curve | |
| CN110296921B (en) | Testing device and testing method for shale gas permeability under reservoir conditions in steady state method | |
| CN208171813U (en) | A kind of multi-functional permeability test device | |
| CN103257089A (en) | Pressure pulse measuring device and method for measuring permeability of matrix and crack by using same | |
| CN104316449A (en) | Experimental method and experimental device for determinating volcanic gas-water relative permeability | |
| CN108369177A (en) | Method and apparatus for the gas permeability for determining subsurface formations | |
| CN210264648U (en) | Multifunctional rock core displacement device | |
| CN105675070A (en) | Irregular Venturi flowmeter and method for measuring gas-liquid phase flow in multiphase flow by utilization of irregular Venturi flowmeter | |
| CN105606517A (en) | Instrument for measuring relative permeability of low permeability reservoir using nuclear magnetic resonance | |
| CN104237099A (en) | Device and method for determining radial permeability of compact rock core | |
| CN104237101B (en) | Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device | |
| CN104297130B (en) | The intrinsic permeability means of interpretation of low-permeability reservoir and system | |
| CN105759015B (en) | A kind of device and method of on-line measurement gas injection oil volume factor and solubility | |
| CN103335682B (en) | Measuring method for gas flow of natural gas | |
| CN110398510A (en) | A kind of rock core oil/water scaling method based on nuclear magnetic resonance transverse relaxation spectral line | |
| CN104359521B (en) | A kind of Large Copacity tank volume detecting system and scaling method | |
| CN103616313A (en) | On-line gas density measuring method | |
| CN204649586U (en) | A kind of Oil in Super-low Permeability rock core leads to nitrogen water two-phase relative permeability determinator | |
| CN205537807U (en) | Take temperature pressure compensation's gas table | |
| CN108132135A (en) | A kind of pipeline flow resistance measuring device and its measuring method | |
| CN106448421B (en) | Fine and close oil reservoir exploitation simulator and method | |
| CN105319153A (en) | Measuring method of liquid full pressure gradient-flow relation in low-permeability reservoir | |
| CN103149137A (en) | Constant-pressure steady-state gas permeability measuring instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Jinyu Inventor after: Di Chaochuan Inventor after: Wang Mengchong Inventor after: Xu Li Inventor after: Ze Jin Ram Inventor after: Wang Diansheng Inventor after: Wang Yudou Inventor after: Yu Lei Inventor after: Liang Yanxuan Inventor after: Zhao Yongxin Inventor after: Wan Yilai Inventor after: Zhang Sibo Inventor after: Wang Xinwei Inventor before: Liu Jinyu Inventor before: Wang Diansheng Inventor before: Wang Yudou |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20170918 |