Physical properties and modeling of density,susceptibility and resistivity of Pre-Cambrian system in Sichuan Basin
XIANG Kui1, YAN Liangjun1, HU Hua1, YANG Hui2, WEN Baihong2
1. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan, Hubei 430100, China; 2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
Abstract：The discovery of the large Anyue gas field in the Sichuan Basin has proved that oil and gas resources in the Pre-Cambrian strata are rich and promising in China.Then the Proterozoic system in the Sichuan Basin is becoming a key field for deep oil and gas exploration.Non-seismic exploration is an important means for investigating ultra-deep oil and gas reservoirs.However,gravity,magnetic and electromagnetic data of the Pre-Cambrian in the Sichuan Basin are insufficient,so it is difficult to model the basin upon the gravity,magnetic and geoelectrical structures, limiting the application of gravity,magnetic and electromagnetic exploration.Based on the Pre-Cambrian outcrops in the Sichuan basin,the density,susceptibility,complex resistivity and polarization were analyzed on the samples of the sedimentary rocks,metamorphic rocks and igneous rock,models of gravity,magnetic,and geoelectrical properties of the ancient Pre-Cambrian strata were built.The important parameters of the Pre-Cambrian hydrocarbon source rock based on gravity,magnetic and electric data provide the physical basis for the processing and interpretation of non-seismic data for oil and gas exploration in Sichuan Basin.
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XIANG Kui, YAN Liangjun, HU Hua, YANG Hui, WEN Baihong. Physical properties and modeling of density,susceptibility and resistivity of Pre-Cambrian system in Sichuan Basin. Oil Geophysical Prospecting, 2020, 55(5): 1160-1168.
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