CN206339467U - Core porosity measurement apparatus - Google Patents
Core porosity measurement apparatus Download PDFInfo
- Publication number
- CN206339467U CN206339467U CN201620923240.3U CN201620923240U CN206339467U CN 206339467 U CN206339467 U CN 206339467U CN 201620923240 U CN201620923240 U CN 201620923240U CN 206339467 U CN206339467 U CN 206339467U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- measurement apparatus
- entrance
- utility
- 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
Abstract
The utility model discloses a kind of core porosity measurement apparatus, wherein, the outlet of helium tank and the entrance of pressure-reducing valve are connected, the outlet of pressure-reducing valve is connected with the first end of the first valve, first end, the entrance of sample room and the test side of pressure sensor of second end of the first valve respectively with the second valve are connected, second end of the second valve is connected with the first end of the 3rd valve and the entrance of reference cell respectively, second end of the 3rd valve is hanging, and the signal output part of pressure sensor and the signal input part of digital wash are connected.The utility model is by changing the helium air intake structure of sample room and reference cell, it can realize and high-tension measurement helium is introduced into sample room first, partial pressure is to reference cell again, significantly increase pressure change before and after partial pressure, and pressure change reduces and increased with rock pore volume, under the conditions of equivalent devices, the porosity of core sample especially low-porosity sample can be more accurately measured using measurement apparatus of the present utility model.
Description
Technical field
The utility model is related to a kind of core porosity measurement apparatus, more particularly to a kind of measurement gas can be introduced into sample
Partial pressure enters the core porosity measurement apparatus of reference cell again behind room.
Background technology
The core porosity measuring method of existing domestic and international main flow, it is main using oil and gas industry standard SY/T
5336-2006《Core analysis method》（That is API RP 40：1998, Recommended Practices for Core
Analysis, IDT Chinese introduce version）In, 5.3.2.1.1 Boyle law dual chamber methods（Rock sample cup）Determine particle volume
The apparent volume of regular rock core is determined with 5.2.3 kind of calliper method, apparent volume subtracts the difference divided by apparent volume of particle volume, i.e.,
For porosity.
In theory, the measurement apparatus that the above method is used can determine the regular rock core of arbitrary dimension, any porosity
Sample；But in actual applications, it is necessary to consider that：
During determining particle volume using Robert Boyle dual chamber method, actual gas pressure is converted to pressure sensor
Electric signal, and the registration of the digital wash be converted to is finally transmitted, there is error during a series of conversions；
Manometric figure place showing is limited, i.e. the limited resolution of pressure-measuring system；
As described in SY/T 5336-2006 5.3.2.1.1.8 f, sample room is put into after rock core and filling block, except rock core
Hole outside, also there is system void volume in sample room and pipeline；
As described in SY/T 5336-2006 5.3.2.1.1.8 g, pore volume should be close with reference building volume, but works as hole
During gap volume very little, reference building volume is difficult to approximate with pore volume；
The essence of core porosity is measured using Boyle law dual chamber method, that is, measures the pressure caused by rock pore volume
Power changes, and pore volume is more big, and the pressure change caused by it is bigger；Got over hour with respect to reference cell in pore volume, pressure becomes
Change is then smaller, and the change of error relative pressure is bigger, influences bigger to measurement result.
To sum up, the Boyle law dual chamber method that SY/T 5336-2006 recommend（Rock sample cup）Particle volume is determined, is being determined
Low-porosity sample such as shale（Porosity is often 0~2%）When, measuring result error is larger, have impact on follow-up test and research.
Utility model content
The purpose of this utility model, which is that, provide that one kind is determining low-porosity sample such as in order to solve the above problems
Still there is the core porosity measurement apparatus of high-acruracy survey result during shale.
The utility model is achieved through the following technical solutions above-mentioned purpose：
A kind of core porosity measurement apparatus, including helium tank, pressure-reducing valve, sample room, reference cell, pressure sensor sum
Word shows table, also including the first valve, the second valve and the 3rd valve, the outlet of the helium tank and the entrance of the pressure-reducing valve
Connection, the outlet of the pressure-reducing valve is connected with the first end of first valve, the second end of first valve respectively with institute
State the test side connection of first end, the entrance of the sample room and the pressure sensor of the second valve, second valve
The second end be connected respectively with the first end of the 3rd valve and the entrance of the reference cell, the second end of the 3rd valve
Vacantly, the signal output part of the pressure sensor is connected with the signal input part of the digital wash.
Preferably, the digital wash can at least show all effective digitals plus 1 bit sign position；First valve
The displacement volume of door, second valve and the 3rd valve is 0.
The beneficial effects of the utility model are：
The utility model is by changing the helium air intake structure of sample room and reference cell, it is possible to achieve by high-tension measurement helium
Sample room, then partial pressure are introduced first to reference cell, and the measurement apparatus used relative to traditional industry standard methods is significantly increased
Pressure change before and after partial pressure, and pressure change reduces and increases with rock pore volume, under the conditions of the equivalent devices, using this
The measurement apparatus of utility model can more accurately measure the porosity of core sample especially low-porosity sample.
Brief description of the drawings
Fig. 1 is the structural representation of core porosity measurement apparatus described in the utility model；
Fig. 2 is structural representation when core porosity measurement apparatus described in the utility model is applied.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in figure 1, core porosity measurement apparatus described in the utility model includes helium tank 1, pressure-reducing valve 9, sample room
3rd, reference cell 2, pressure sensor 4, digital wash 5, the first valve 8, the second valve 7 and the 3rd valve 6, helium tank 1 go out
The entrance connection of mouth pressure-reducing valve 9, the outlet of pressure-reducing valve 9 is connected with the first end of the first valve 8, the second end point of the first valve 8
Test side not with the first end of the second valve 7, the entrance of sample room 3 and pressure sensor 4 is connected, and the second of the second valve 7
End is connected with the first end of the 3rd valve 6 and the entrance of reference cell 2 respectively, and the second end of the 3rd valve 6 is hanging, is used as emptying
End, the signal output part of pressure sensor 4 is connected with the signal input part of digital wash 5.Preferably, pressure sensor 4
Absolute pressure is measured, digital wash 5 can at least show all effective digitals plus 1 bit sign position, and such as measured value should contain 3 reliability
Numeral should at least show 5 with 1 incredible figures, then digital wash 5；First valve 8, the second valve 7 and the 3rd valve 6
Displacement volume is 0.
In order to clearly demonstrate the technique effect of core porosity measurement apparatus described in the utility model, below with optimization
Measuring method confirm, but following preferred measurements unique method that not this measurement apparatus can be used, nor this
The protection object of utility model.
As shown in Fig. 2 the preferred measurement that core porosity measurement apparatus described in the utility model is used, including it is following
Step：
（1）Calibration, specifically includes following steps：
（1.1）By adjusting the range upper limit that pressure-reducing valve 9 makes helium admission pressure close to pressure sensor 4；
（1.2）The second valve 7 and the 3rd valve 6 are opened, is closed after about 30 seconds, the stabilization of record digital wash 5 is shown
Number, is designated as Pa1；
（1.3）Vacant sample room 3, opens the first valve 8, and the first valve 8 is closed after about 30 seconds, records digital wash 5
Stable registration, be designated as P1；
（1.4）The second valve 7 is opened, the stable registration of digital wash 5 is recorded, P2 is designated as, the 3rd valve 6 is opened and puts
Closed after sky；
（1.5）Sample room 3 is loaded into standard stainless steel filling block as much as possible, filling block cumulative volume is designated as Vf0；
（1.6）The first valve 8 is opened, the first valve 8 is closed after about 30 seconds, the stable registration of digital wash 5 is recorded,
It is designated as P3；
（1.7）The second valve 7 is opened, the stable registration of digital wash 5 is recorded, P4 is designated as, the 3rd valve 6 is opened and puts
Closed after sky；
（1.8）Simultaneous equation below：
Obtain reference building volume Vr and sample building volume Vc, wherein Za1, Z1, Z2, Z3, Z4 are respectively when temperature is Ta pair
Answer the Gas Compression Factor of helium under pressure Pa 1, P1, P2, P3, P4；Environment conditions constant, environment temperature are kept in measurement process
It is designated as Ta, and assume that gas temperature is T in system during all pressure readingsa；
（1.9）Repeat step after filling block volume in adjustment sample room 3（1.5）Extremely（1.8）, it is repeated multiple times to complete calibration；
（2）Measurement, specifically includes following steps：
（2.1）Apparent volume is put into sample room 3 for Vs rock core, and loads standard stainless steel filling block as much as possible,
Filling block cumulative volume is designated as Vf1；
（2.2）The second valve 7 and the 3rd valve 6 are opened, is closed after about 30 seconds, the stable registration of digital wash 5 is recorded,
It is designated as Pa2；
（2.3）The first valve 8 is opened, the first valve 8 is closed after about 30 seconds, the stable registration of digital wash 5, note is recorded
For P5；
（2.4）The second valve 7 is opened, the stable registration of digital wash 5 is recorded, P6 is designated as, the 3rd valve 6 is opened and is vented
After close；
（2.5）Simultaneous equation below：
%
Core porosity is obtained, wherein Za2, Z5, Z6 is the gas of helium under corresponding pressure Pa2, P5, P6 when temperature is Ta
Body compressibility factor, Vg is the particle volume of sample, and Vp is the pore volume of sample.
Above-described embodiment is preferred embodiment of the present utility model, is not the limit to technical solutions of the utility model
System, as long as the technical scheme that can be realized without creative work on the basis of above-described embodiment, is regarded as falling into
In the rights protection scope of the utility model patent.
Claims (2)
1. a kind of core porosity measurement apparatus, including helium tank, pressure-reducing valve, sample room, reference cell, pressure sensor and numeral
Show table, it is characterised in that：Also include the first valve, the second valve and the 3rd valve, the outlet of the helium tank subtracts with described
The entrance connection of pressure valve, the outlet of the pressure-reducing valve is connected with the first end of first valve, and the second of first valve
The test side respectively with the first end of second valve, the entrance of the sample room and the pressure sensor is held to be connected, institute
The second end for stating the second valve is connected with the first end of the 3rd valve and the entrance of the reference cell respectively, the 3rd valve
Second end of door is hanging, and the signal output part of the pressure sensor is connected with the signal input part of the digital wash.
2. core porosity measurement apparatus according to claim 1, it is characterised in that：The digital wash can at least show
Show all effective digitals plus 1 bit sign position；The displacement volume of first valve, second valve and the 3rd valve is equal
For 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923240.3U CN206339467U (en) | 2016-08-23 | 2016-08-23 | Core porosity measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923240.3U CN206339467U (en) | 2016-08-23 | 2016-08-23 | Core porosity measurement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206339467U true CN206339467U (en) | 2017-07-18 |
Family
ID=59299195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620923240.3U Expired - Fee Related CN206339467U (en) | 2016-08-23 | 2016-08-23 | Core porosity measurement apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206339467U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153522A (en) * | 2016-08-23 | 2016-11-23 | 重庆泛嘉晟禾工程技术检测有限公司 | Core porosity measurement apparatus and measuring method |
| CN110823776A (en) * | 2019-10-24 | 2020-02-21 | 中国矿业大学(北京) | Measuring device for rock porosity |
-
2016
- 2016-08-23 CN CN201620923240.3U patent/CN206339467U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153522A (en) * | 2016-08-23 | 2016-11-23 | 重庆泛嘉晟禾工程技术检测有限公司 | Core porosity measurement apparatus and measuring method |
| CN110823776A (en) * | 2019-10-24 | 2020-02-21 | 中国矿业大学(北京) | Measuring device for rock porosity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103115844B (en) | Measuring method for isothermal adsorption/desorption curve of coaly shale | |
| CN106153522B (en) | Core porosity measuring device and measuring method | |
| CN105910971B (en) | The simultaneous measuring method of rich organic matter compact rock core gas permeability and diffusion coefficient | |
| CN104713812B (en) | A kind of bearing calibration based on rock core gas permeability measuring device | |
| CN104713814B (en) | Real-time measurement device, measurement method and calculation method for permeability, porosity and compression coefficient of rock | |
| CN104374683B (en) | A kind of rock core pore compressibility test device and its method of testing | |
| CN105136389B (en) | 10‑9The vacuum partial pressure calibrating installation and calibration factor acquisition methods of Pa magnitudes | |
| CN104266951B (en) | A kind of for accurately measuring the system and method that loaded coal rock porosity dynamically changes | |
| CN104034644B (en) | A kind of can the heterogeneous percolating medium triaxial stress seepage flow coupling test device of Quick Measurement porosity | |
| CN206920290U (en) | A kind of hyposmosis tight sand stress sensitive coefficients measurement apparatus | |
| CN103759906B (en) | Device and method based on static expanding method vacuum standard calibration vacuum leak | |
| CN102589809B (en) | Portable leak detector calibration system and method | |
| CN209745750U (en) | Deformation-adsorption capacity synchronous testing device in gas adsorption process of coal body | |
| CN106370260B (en) | The measurement method of tolerance is lost in a kind of test of shale air content | |
| CN104297126A (en) | Device and method applied to measurement of low-permeability reservoir gas seepage start-up pressure gradient | |
| CN206339467U (en) | Core porosity measurement apparatus | |
| CN104034645A (en) | Detection algorithm for pore structure of shale gas reservoir | |
| CN100545609C (en) | Adopt linear vacuum gauge to measure the device and method of orifice conductance | |
| CN104729974B (en) | A kind of gas gaging hole porosity measuring method for considering temperature effect | |
| CN206546315U (en) | A kind of hyposmosis tight sand permeability experimental provision | |
| CN112485175A (en) | Rock porosity measuring method and measuring device | |
| Vidal et al. | Measurement of physical adsorption of gases at high pressure | |
| CN204575498U (en) | A kind of perm-plug method device measuring flow in low permeability core | |
| CN104764862B (en) | A kind of gas concentration on-the-spot test method | |
| CN106066350A (en) | Soil body quality moisture content correction method of testing based on bushing type probe TDR method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20170718 Termination date: 20200823 |