Genesis of High-Quality Reservoirs of Fan Delta Front in Lower Part of the Fourth Member of Shahejie Formation in Bonan Subsag
Yang Tian
Cao Yingchang
Wang Yanzhong
Wang Jian
Zhang Huina
Abstract：The genesis of high-quality reservoirs is the crucial problem to determine the effective exploration and development for the middle and deep burial reservoirs.This study focuses on the fan delta front reservoir in the lower part of the fourth member of the Shahejie Formation in Bonan subsag.Core and thin section observation,physical property testing and other tech-nical methods were used to analyze the genetic mechanism of high-quality reservoirs of the fan delta front through drilling core, well logging and logging,three-dimension seismic and other materials.The results show that the properties of the reservoirs are mainly controlled by the original properties of different sedimentation facies,the types and influences of diagenesis,the strength and occurrence time of the overpressure and hydrocarbon charging,the fluid migration through fault or unconformity as well as the effect of evaporation.The development of high-quality reservoirs is the result of specific “source-fluid-sink”dia-genesis system.Four factors determine the development of high-quality reservoirs.The first is the favorable sedimentary condi-tion and the second is the favorable migration channels,such as fault,unconformity,high porosity and permeability reservoirs between reservoirs and source rocks.Thirdly,shorter migration path between reservoirs and source rocks,and besides,ade-quate source of fluid,hydrocarbon charging and formation overpressure are also important.
Keywords：fan delta fronthigh-quality reservoircontrolling factordiagenesis systemgenetic mechanismBonan subsagsedimentology
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：14( 2077-2090 )