Method for determining organic porosity of shale gas reservoir stratum

A technology of organic porosity and shale gas, which is applied in the direction of earthwork drilling, wellbore/well components, etc., can solve the problems of high cost, difficulty in continuously analyzing the organic porosity of shale gas reservoirs, and long time consumption, and achieve cost low effect

Inactive Publication Date: 2017-11-17

CHINA PETROLEUM & CHEM CORP +1

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Problems solved by technology

However, this method is time-consuming and expensive, and it is difficult to continuously analyze the organic porosity of ...

Abstract

The invention relates to method for determining the organic porosity of a shale gas reservoir stratum. The method includes the following steps: a first step, acquiring the total porosity Phi t, the organic matter volume content Vorg and the inorganic matter volume content Vsilt of different stratum sections of the shale gas reservoir stratum; a second step, establishing a relation between the total porosity Phi t and the organic matter volume content Vorg and the inorganic matter volume content Vsilt, and acquiring the number Phi Torg of pores of a pure organic matter in unit volume corresponding to each stratum section; and a third step, acquiring the organic porosity Phi org of different stratum sections of the shale gas reservoir stratum according to the Phi Torg and the Vorg.

Application Domain

Borehole/well accessories

Technology Topic

Shale gasUnit volume +4

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Examples

Experimental program(1)

Example Embodiment

[0037] Example 1:

[0038] In the area of Well T1, measure the total porosity φ of different formation intervals of shale gas reservoirs t , the volume content of organic matter V org and the volume content of inorganic matter V silt. The measurement results are shown in Table 1.

[0039] Table 1

[0040]

[0041]

[0042] According to Table 1, the undetermined coefficient φ in formula 3 is determined by least square method Torg and φ Tsilt , get Equation 5.

[0043] φ t =0.2V org +0.036V silt Formula 5

[0044] Therefore, the organic porosity φ org For: φ org =0.2V org.

[0045] figure 2 The organic porosity φ obtained according to Example 1 is shown in one graph org The value of the organic porosity φ measured in the laboratory org value. like figure 2 As shown, the curve 31 is using the organic porosity φ obtained in Example 1 org , the scattered point 32 is the organic porosity φ measured in the laboratory org value. from figure 2 It can be clearly seen in that the organic porosity φ obtained using the method of the present invention org Compared with the organic porosity φ measured in the laboratory org degrees are very close, which shows that the method according to the present invention is suitable for determining the organic porosity φ of shale gas reservoirs org , and the result is very accurate.

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Classification and recommendation of technical efficacy words

low cost

Method, apparatus and article for microfluidic control via electrowetting, for chemical, biochemical and biological assays and the like

InactiveUS7163612B2low cost

Owner:KECK GRADUATE INST OF APPLIED LIFE SCI

Method for determining organic porosity of shale gas reservoir stratum

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Description & Claims & Application Information

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