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
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[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 ...
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