CN106285653A - The method determining the organic porosity of shale gas reservoir - Google Patents
The method determining the organic porosity of shale gas reservoir Download PDFInfo
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- CN106285653A CN106285653A CN201510303455.5A CN201510303455A CN106285653A CN 106285653 A CN106285653 A CN 106285653A CN 201510303455 A CN201510303455 A CN 201510303455A CN 106285653 A CN106285653 A CN 106285653A
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Abstract
A kind of method that the present invention relates to organic porosity determining shale gas reservoir.The method comprises the following steps, step one: measure formation parameter, and formation parameter includes the volume content V of organic matterorg；Step 2: the relation between formation parameter measured by foundation, and thus obtain amount φ of hole in the pure organic matter of unit volumeTorg；Step 3: by φTorgAnd VorgObtain organic porosity φ of the differently interval of shale gas reservoirorg.The method according to the invention, it is possible to the simple organic porosity analyzing shale gas reservoir continuously.
Description
Technical field
The present invention relates to the development field of oil gas field, the method relating more specifically to determine shale organic porosity.
Background technology
Shale gas is the natural gas resource being available for exploitation contained in rammell.Compared with conventional gas, page
The exploitation of rock gas has production life of well length and the advantage of production cycle length, this make shale gas well can chronically with
Stable speed aerogenesis.
Organic pore abundance of shale gas reservoir be the key determining shale gas reservoir quality and gas-bearing property because of
One of element.Therefore, for the exploration and development of shale gas, determine that the organic porosity of shale gas reservoir has
Significance.
In the prior art, focused ion bundle scanning electron microscope is generally used to carry out organic hole of quantitative analysis rock core
Degree.But, this method is the longest, and cost is the highest, and is difficult to analyze the organic of shale gas reservoir continuously
Porosity, it is difficult to react the organic void distribution situation of shale gas reservoir on the whole.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of method of organic porosity determining shale gas reservoir.Root
According to method of the invention, it is possible to analyze the organic porosity of shale gas reservoir the most continuously.
The method of the present invention, including step one: measure formation parameter, formation parameter includes that the volume of organic matter contains
Amount Vorg；Step 2: the relation between formation parameter measured by foundation, and it is pure thus to obtain unit volume
Amount φ of the hole in organic matterTorg；Step 3: by φTorgAnd VorgObtain the Different Strata of shale gas reservoir
Organic porosity φ of sectionorg。
In the method for the invention, formation parameter is just be able to be held by conventional well-log information and/or logging technique
Changing places and obtain, therefore, those skilled in the art can be conveniently used the method for the present invention, it is not necessary to high
Expensive expense is to obtain these parameters.Additionally, due to for shale gas reservoir, formation parameter is continuous
, therefore use the method for the present invention can obtain in shale gas reservoir, organic porosity is along with depth of stratum
Change and situation about changing, such that it is able to reflect the organic void distribution situation of shale gas reservoir on the whole.
In one embodiment, shale gas reservoir includes organic matter, shale mineral and brittle mineral, in step one
In, measure the total porosity φ of the differently interval of shale gas reservoirt, organic volume content Vorg, shale
Mineral volume content VclayWith brittle mineral volume content Vsd, in step 2, set up total porosity φtAnd have
The volume content V of machine matterorg, shale mineral volume content VclayWith brittle mineral volume content VsdBetween pass
System, and obtain the hole in the pure organic matter of the unit volume corresponding with each stratomere according to the relation set up
Amount φTorg.It has been found that the organic matter of shale gas reservoir, shale mineral are different with the character of brittle mineral,
And the change of its content can affect the quantity of the organic porosity in shale gas reservoir.Thus, applicant is by page
The organic matter of rock gas reservoir, shale mineral and brittle mineral are as the independent influence factor to organic porosity
Consider such that it is able in reaction shale gas reservoir, organic porosity becomes along with the change of depth of stratum more accurately
Situation about changing.
In one embodiment, total porosity φt, organic volume content Vorg, shale mineral volume content
VclayWith brittle mineral volume content VsdAll obtained by well-log information.Logging technique is those skilled in the art
Technology known to Yuan.Thus, user is facilitated by means of existing well-log information to use the side of the present invention
Method.
In one embodiment, in step 2, total porosity φt, organic volume content Vorg, shale
Mineral volume content VclayWith brittle mineral volume content VsdBetween relation can express with following formula:
φt=φTorgVorg+φTsdVsd+φTclayVclay,
In formula, φTorgFor the amount of the hole in the pure organic matter of unit volume corresponding with each stratomere,
φTsdFor the amount of the hole in the pure brittle mineral of unit volume corresponding with each stratomere,
φTclayFor the amount of the hole in the unit volume pure shale mineral corresponding with each stratomere,
Wherein, for drilling well area, φTorg、φTsdAnd φTclayIt is constant.
In one embodiment, the total porosity φ of the differently interval of shale gas reservoir that will be measuredt, organic
The volume content V of matterorg, shale bulk volume VclayWith mineral volume content VsdWith method of least square number
Learn matching to obtain this relational expression.
Organic porosity φ of the differently interval of shale gas reservoirorgCan express with following formula,
φorg=φTorgVorg
With only use total porosity φt, the volume content V of machine matterorg, shale mineral volume content VclayAnd fragility
Mineral volume content VsdThree groups of data solve ternary linear function group and solve and draw φTorg、φsiltAnd φTclay
Comparing, the method for the present invention combines substantial amounts of data, therefore by the φ obtained by the method for the present inventionTorgMore
The organic porosity in shale gas reservoir can be reacted truly.Therefore, the differently interval of shale gas reservoir has
Machine porosity φorgThe most accurate.
Compared with prior art, it is an advantage of the current invention that: (1) can be by conventional well-log information and/or survey
The parameter of well technology realizes the method for the present invention, therefore, those skilled in the art can facilitate and cost relatively
The method using the present invention lowly.(2) method of the present invention can obtain in shale gas reservoir, You Jikong
The situation that porosity changes along with the change of depth of stratum, such that it is able to react having of shale gas reservoir on the whole
Machine space distribution situation.(3) method of the present invention combines substantial amounts of data, thus by the method for the present invention
Obtained organic porosity φorgMore can react the organic porosity in shale gas reservoir truly.
Accompanying drawing explanation
Hereinafter based on embodiment reference accompanying drawing, the present invention will be described in more detail.Wherein:
Fig. 1 show schematically show the step implementing the method according to the invention.
Fig. 2 is that the organic porosity of the shale gas reservoir that use obtains according to embodiments of the invention is divided with laboratory
The comparison diagram of the organic porosity of the shale gas reservoir that analysis obtains.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 show schematically show the step implementing the method according to the invention.
First, step 1 is carried out: measure formation parameter.
It has been found that the organic volume content V in formation parameterorg, the Different Strata of shale gas reservoir
The shale mineral volume content V of sectionclayWith brittle mineral volume content VsdHaving in shale gas reservoir will be affected
The quantity of machine porosity, these parameters be thought of as machine matter porosity the most in the method for the invention is independent
Influence factor.Total porosity φt, organic volume content Vorg, shale mineral volume content VclayAnd fragility
Mineral volume content VsdBeing can be obtained by well-log information, this preparation method is those skilled in the art institute
Known to, repeat no more here.
Then, carry out step 2, set up the relation between formation parameter, and thus obtain that unit volume is pure to be had
Amount φ of the hole in machine matterTorg。
The differently interval total porosity φ of shale gas reservoirtWith organic volume content Vorg, shale minerals
Long-pending content VclayWith brittle mineral volume content VsdBetween relation be represented by formula 1:
φt=φTorgVorg+φTsdVsd+φTclayVclayFormula 1,
In formula 1, φTorgFor the amount of the hole in the pure organic matter of unit volume corresponding with each stratomere, φTsd
For the amount of the hole in the pure brittle mineral of unit volume corresponding with each stratomere, φTclayFor with each stratomere
The amount of the hole in corresponding unit volume pure shale mineral.For drilling well area, φTorg、φTsd
And φTclayIt is constant.
From mathematical meaning, formula 1 is a function, and wherein independent variable is Vorg、Vclay、Vsd；Because becoming
Amount is φt；Undetermined coefficient is φTorg、φTsdAnd φTclay.Thus, it is possible to simulate formula by least square
1 and obtain undetermined coefficient φTorg、φTsdAnd φTclay。
Finally, step 3 is carried out: by φTorgAnd VorgObtain organic hole of the differently interval of shale gas reservoir
Degree φorg.Such as, φorg=φTorgVorg。
It will also be appreciated that based on well-log information, total porosity φt, organic volume content VorgAnd
Shale mineral volume content VclayWith brittle mineral volume content VsdIt it is continually varying.Therefore, according to this
Bright method can continuously determine out organic porosity φ of shale gas reservoirorg, and measurement result is shown as one
Bar curve.
For exploitation shale gas, gas described here is natural gas.
Embodiment 1:
In T1 well area, measure the total porosity φ of the differently interval of shale gas reservoirt, organic volume
Content Vorg, shale mineral volume content VclayWith brittle mineral volume content Vsd.Measurement result such as table 1 institute
Show.
Table 1
| The degree of depth (m) | φt(%) | Vorg(%) | Vclay(%) | Vsd(%) |
| 2330 | 4.76 | 1.84 | 56.76 | 41.40 |
| 2330.125 | 4.93 | 2.69 | 56.58 | 40.73 |
| 2330.25 | 5.05 | 3.47 | 56.41 | 40.12 |
| 2330.375 | 5.04 | 3.93 | 55.43 | 40.64 |
| 2330.5 | 4.87 | 4.01 | 54.05 | 41.94 |
| 2330.625 | 4.61 | 3.70 | 53.82 | 42.47 |
| 2330.75 | 4.39 | 3.20 | 54.99 | 41.81 |
| 2330.875 | 4.30 | 2.85 | 56.23 | 40.92 |
| 2331 | 4.33 | 2.97 | 56.24 | 40.79 |
| 2331.125 | 4.47 | 3.44 | 55.39 | 41.17 |
| 2331.25 | 4.65 | 3.78 | 55.04 | 41.18 |
| 2331.375 | 4.82 | 3.78 | 55.61 | 40.61 |
| 2331.5 | 4.94 | 3.59 | 56.38 | 40.03 |
| 2331.625 | 5.01 | 3.40 | 57.07 | 39.53 |
| 2331.75 | 5.05 | 3.24 | 57.91 | 38.85 |
| 2331.875 | 5.12 | 3.13 | 58.80 | 38.08 |
| 2332 | 5.21 | 3.20 | 59.02 | 37.77 |
| 2332.125 | 5.31 | 3.63 | 58.03 | 38.34 |
| 2332.25 | 5.37 | 4.12 | 56.51 | 39.37 |
| 2332.375 | 5.38 | 4.20 | 55.73 | 40.07 |
| 2332.5 | 5.32 | 3.82 | 55.89 | 40.29 |
| 2332.625 | 5.24 | 3.24 | 56.60 | 40.16 |
| 2332.75 | 5.17 | 2.77 | 57.14 | 40.09 |
| 2332.875 | 5.15 | 2.41 | 57.44 | 40.15 |
| 2333 | 5.14 | 2.09 | 57.90 | 40.02 |
| 2333.125 | 5.13 | 2.01 | 58.26 | 39.74 |
| 2333.25 | 5.09 | 2.17 | 58.30 | 39.53 |
| 2333.375 | 5.04 | 2.45 | 57.92 | 39.63 |
| 2333.5 | 4.98 | 2.65 | 57.62 | 39.73 |
| 2333.625 | 4.93 | 2.61 | 57.96 | 39.43 |
| 2333.75 | 4.89 | 2.49 | 58.44 | 39.07 |
| 2333.875 | 4.88 | 2.45 | 58.32 | 39.23 |
| 2334 | 4.90 | 2.77 | 56.88 | 40.35 |
| 2334.125 | 4.99 | 3.16 | 55.32 | 41.51 |
| 2334.25 | 5.12 | 3.36 | 54.85 | 41.79 |
| 2334.375 | 5.24 | 3.20 | 55.78 | 41.01 |
| 2334.5 | 5.31 | 2.81 | 57.20 | 39.99 |
| 2334.625 | 5.31 | 2.25 | 58.16 | 39.59 |
| 2334.75 | 5.23 | 1.76 | 58.58 | 39.66 |
| 2334.875 | 5.11 | 1.59 | 58.83 | 39.58 |
According to table 1, determine undetermined coefficient φ in formula 1 with method of least squareTorg、φTsdAnd φTclay,
To formula 2.
φt=0.23Vorg+0.01Vsd+0.07VclayFormula 2
Can draw from formula 2, the φ of shale gas reservoirTorgValue is 0.23.Therefore, in T1 wellblock, differently
Organic porosity φ of intervalorgCan express by formula 3,
φorg=0.23VorgFormula 3.
Fig. 2 shows organic porosity φ obtained according to embodiment 1 in a figureorgValue with at laboratory
Organic porosity φ recordedorgValue.As in figure 2 it is shown, what curve 31 was used in obtaining in embodiment 1
Organic porosity φorg, scatterplot 32 is organic porosity φ recorded at laboratoryorgValue.Can be clear from Fig. 2
See to Chu, make organic porosity φ being obtained by the present inventionorgThe organic porosity recorded with laboratory
φorgClosely, this explanation the method according to the invention is suitable for determining organic hole of shale gas reservoir to degree
Degree φorg, and result is the most accurate.
Although by reference to preferred embodiment, invention has been described, but without departing from the scope of the present invention
In the case of, the every technical characteristic being previously mentioned in each embodiment all can be combined in any way.
The invention is not limited in specific embodiment disclosed herein, but include the institute fallen within the scope of the appended claims
There is technical scheme.
Claims (6)
1. the method determining the organic porosity of shale gas reservoir, comprises the following steps,
Step one: measure formation parameter, described formation parameter includes the volume content V of organic matterorg；
Step 2: the relation between formation parameter measured by foundation, and it is pure organic thus to obtain unit volume
Amount φ of the hole in matterTorg；
Step 3: by φTorgAnd VorgObtain organic porosity φ of the differently interval of shale gas reservoirorg。
Method the most according to claim 1, it is characterised in that described shale gas reservoir include organic matter,
Shale mineral and brittle mineral,
In described step one, measure the total porosity φ of the differently interval of shale gas reservoirt, organic body
Long-pending content Vorg, shale mineral volume content VclayWith brittle mineral volume content Vsd,
In described step 2, set up described total porosity φtVolume content V with described organic matterorg, described
Shale mineral volume content VclayWith described brittle mineral volume content VsdBetween relation, and according to described
Relation obtains amount φ of the hole in the pure organic matter of the unit volume corresponding with each stratomereTorg。
Method the most according to claim 2, it is characterised in that described total porosity φt, organic
Volume content Vorg, shale mineral volume content VclayWith brittle mineral volume content VsdAll pass through well-log information
Obtain.
The most according to the method in claim 2 or 3, it is characterised in that in described step 2, described
Total porosity φt, the volume content V of described organic matterorg, described shale mineral volume content VclayCrisp with described
Property mineral volume content VsdBetween relational expression can express with following formula:
φt=φTorgVorg+φTsdVsd+φTclayVclay,
In formula, φTorgFor the amount of the hole in the pure organic matter of unit volume corresponding with each stratomere,
φTsdFor the amount of the hole in the pure brittle mineral of unit volume corresponding with each stratomere,
φTclayFor the amount of the hole in the unit volume pure shale mineral corresponding with each stratomere,
Wherein, for drilling well area, φTorg、φTsdAnd φTclayIt is constant.
Method the most according to claim 4, it is characterised in that by the shale gas reservoir that measured not
Total porosity φ with stratomeret, organic volume content Vorg, shale mineral volume content VclayAnd fragility
Mineral volume content VsdCarry out Mathematical Fitting to obtain described relational expression with method of least square, thus obtain φTorg
Value.
6. according to the method according to any one of claim 1 to 5, it is characterised in that described shale gas stores up
Organic porosity φ of the differently interval of layerorgCan express with following formula,
φorg=φTorgVorg。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370578A (en) * | 2016-08-30 | 2017-02-01 | 中国石油天然气股份有限公司 | Method and system for determining shale organic matter porosity |
| CN107355218A (en) * | 2016-05-09 | 2017-11-17 | 中国石油化工股份有限公司 | The method for determining the organic porosity of shale gas reservoir |
| CN113959919A (en) * | 2020-07-21 | 2022-01-21 | 中国石油化工股份有限公司 | Calculation method for porosity of organic matter in shale layer interval and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005100978A1 (en) * | 2004-04-09 | 2005-10-27 | Shell Internationale Research Maatschappij B.V. | Apparatus and methods for acoustically determining fluid properties while sampling |
| CN101832133A (en) * | 2010-01-28 | 2010-09-15 | 中国石油集团川庆钻探工程有限公司 | Method for judging reservoir fluid type of difference between density porosity and neutron porosity |
| CN103982178A (en) * | 2014-04-16 | 2014-08-13 | 孙赞东 | Mineral content-based brittleness evaluation method for shale gas reservoir |
| CN104007485A (en) * | 2014-04-16 | 2014-08-27 | 孙赞东 | Method for establishing complex pore shale rock physical model |
| CN104794351A (en) * | 2015-04-23 | 2015-07-22 | 中国地质大学（武汉） | Total shale gas reservoir organic porosity degree computing method and device |
-
2015
- 2015-06-05 CN CN201510303455.5A patent/CN106285653A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005100978A1 (en) * | 2004-04-09 | 2005-10-27 | Shell Internationale Research Maatschappij B.V. | Apparatus and methods for acoustically determining fluid properties while sampling |
| CN101832133A (en) * | 2010-01-28 | 2010-09-15 | 中国石油集团川庆钻探工程有限公司 | Method for judging reservoir fluid type of difference between density porosity and neutron porosity |
| CN103982178A (en) * | 2014-04-16 | 2014-08-13 | 孙赞东 | Mineral content-based brittleness evaluation method for shale gas reservoir |
| CN104007485A (en) * | 2014-04-16 | 2014-08-27 | 孙赞东 | Method for establishing complex pore shale rock physical model |
| CN103982178B (en) * | 2014-04-16 | 2016-01-20 | 刘致水 | A kind of shale gas reservoir brittleness evaluation method based on mineral content |
| CN104794351A (en) * | 2015-04-23 | 2015-07-22 | 中国地质大学（武汉） | Total shale gas reservoir organic porosity degree computing method and device |
Non-Patent Citations (3)
| Title |
|---|
| 张烈辉等编著: "《多相流数值试井理论及方法》", 30 November 2010 * |
| 李军等: "页岩气储层"四孔隙"模型建立及测井定量表征方法", 《石油与天然气地质》 * |
| 王玉满等: "川南下志留统龙马溪组页岩储集空间定量表征", 《中国科学：地球科学》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355218A (en) * | 2016-05-09 | 2017-11-17 | 中国石油化工股份有限公司 | The method for determining the organic porosity of shale gas reservoir |
| CN106370578A (en) * | 2016-08-30 | 2017-02-01 | 中国石油天然气股份有限公司 | Method and system for determining shale organic matter porosity |
| CN113959919A (en) * | 2020-07-21 | 2022-01-21 | 中国石油化工股份有限公司 | Calculation method for porosity of organic matter in shale layer interval and application thereof |
| CN113959919B (en) * | 2020-07-21 | 2024-04-09 | 中国石油化工股份有限公司 | Calculation method of organic matter porosity in shale interval and application thereof |
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