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- Title
倾斜砂岩地层电阻率各向异性实验及校正方法.
- Authors
唐军; 信毅; 申威; 章成广; 许巍
- Abstract
In order to improve rock resistivity accuracy in evaluation of inclined reservoir fluid properties, it is necessary to clarify the variation law of rock resistivity with formation anisotropy and dip. On the basis of comparative analysis of 2 experimental schemes to simulate formation dip, physical resistivity measurement experiments are carried out for anisotropy and dip of tight sandstone samples. The relationship of dip and anisotropy vs. core resistivity is simulated by finite element method in “two-electrode” measuring mode. The experiment results show that rock resistivity decreases with porosity increase, and anisotropy coefficient increases with argillaceous content increase. Porosity structure coefficient increases with formation dip increase. When formation dip is constant, pore structure coefficient increases with porosity increase. When formation dip is higher than 20°, rock resistivity increment exceeds 5%, which requires resistivity correction. By establishing relationship between measured resistivity and theoretical formula calculated resistivity, a resistivity correction method for overcoming anisotropy and dip is formed. This study provides experimental basis for resistivity correction and multi-well saturation correlation analysis of reservoirs with different dips and anisotropy.
- Publication
Petroleum Geology & Oilfield Development in Daqing, 2023, Vol 42, Issue 1, p142
- ISSN
1000-3754
- Publication type
Article
- DOI
10.19597/J.ISSN.1000-3754.202111079