THE SEDIMENTARY FACIES OF THE SECOND MEMBER OF BAOQUANLING FORMATION AROUND FZ4 EXPLORATORY WELL IN THE FANGZHENG FAULTED DEPRESSION

Based on the drill hole, logging and seismic data, the styles and distribution of the sedimentary facies of the second member of Baoquanling Formation in Fangzheng faulted depression are studied with sedimentological and geophysical theories. The results show that the sedimentary facies types are mainly fan delta facies, lacustrine facies and sublacustrine fan facies. According to the correlation between sedimentary facies and seismic facies, it is identified that the second member of Baoquanling Formation belongs to the fan delta-shore shallow lake-semi-deep lake sedimentary system with developed horizontal drainage.