On Sedimentary Provenance and Related Reservoir Characteristics of Block He 142 in Xianhe Oilfield

The sedimentary provenances in the middle member of Es3 of He 142 Area were analyzed by using the method of comprehensive heavy mineral analysis,it was proposed that there were four provenances,and characterized accordingly by 4 sub-areas with different combinations of heavy minerals.The sedimentary and facies were different according to different provenances,that is,Region I in the east short and coarse-grained provenance was characterized by debris flow of underwater fan and gravity flow of alluvial fan,and Region II in the north provenance was characterized by medium distance and medium to fine grained fluvial-lacustrine sedimentation,and Region III of the north provenance was characterized by long distance and fine grained lacustrine and estuary bar sedimentation,and Region IV in the south provenance was characterized by long distance and fine grained fluvial facies.Based on the study above,it is predicted that the west-north and south part of the area are rich provenance and the north part is the next,and the east and central part are poor in reservoir physical property.