Optimal Retrieval Method for Mineral Constituents of Shale Oil Reservoirs in Jiyang Sag

doi:10.3969/j.issn.1006-6535.2022.02.003

Abstract

Abstract: To address the problems of complex and diverse mineral constituents in shale oil reservoirs, inconsistent mineral volume and content models, and difficulties in accurate quantitative evaluation of mineral constituents, the organic framework was introduced to build a petrophysical volume model of "dual-framework" mineral constituents in shale oil reservoirs based on the experimental data of core analysis by X-ray diffraction on all minerals in the rock and thin slice identification of continental shale oil reservoirs in Jiyang Sag, and the optimal retrieval method with least-squares and singular value decomposition was used to calculate the volume and content of mineral constituents of organic and inorganic framework in shale oil reservoirs after the correction of reservoir triple porosity. The research shows that the correlation between the mineral volume content calculated by the optimal inversion method and the X-ray diffraction measurement results is more than 0.60, which has been verified and applied in actual wells. The study results provide strong support for the accurate evaluation of shale oil reservoirs.

Key words: shale oil, "dual-framework" mineral assemblage model, inversion, log identification, Jiyang Sag

CLC Number:

TE135

Lai Fuqiang, Li Shichao, Wang Min, Liu Yuejiao, Zhong Lulu, Huang Zhaohui, Wang Haitao. Optimal Retrieval Method for Mineral Constituents of Shale Oil Reservoirs in Jiyang Sag[J]. Special Oil & Gas Reservoirs, 2022, 29(2): 16-23.

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