西湖凹陷西斜坡断层-岩性圈闭形成条件探讨.pdf

第42卷第2期 洛* h $ Vol. 42 No. 2
2022dels,辻 is considered that various
types of sand bodies such as delta branch channels, tidal flat sands and tidal channels are developed in the sedimentary environment
of tidal flat and tide-dominate delta intergrowth, which is formed for the reason that the slope belt with the geomorphic background
of low eastern part and high western part caused the provenance to advance from west to east. Four types of fault-lithologic traps are
formed under the control of faults and landfbnns, those are traps of the up dip pinch out zone of sandstone on the downthrown side
slope of the consequent main fault and the block zone from the flank of the fault, traps of the up dip block of the downthrown side of
the multilevel consequent fault and the pinch out zone of sandstone on the flank, traps of the up dip pinch out zone of sandstone on
the downthrown side of the antithetic fault and the block zone from the flank of the fault, and traps of the up dip block of the
upthrown side of the antithetic fault and the pinch out zone of sandstone on the flank.
Keywords: West Slope of Xihu Sag; fault-lithologic trap; fault and landform; depositional condition; sand-control model
收稿日期：2022-01-07;改回日期：2022-03-23
第一作者简介：李倩，女，1987年生，硕士，工程师，2014年毕业于中国地质大学（武汉）矿产普查与勘探专业，