黄骅坳陷沙一段沉积体系研究

Research on Es_1 Sedimentary System in Huanghua Depression

黄骅坳陷沙一段是该坳陷含油范围最广、油层分布最稳定的勘探开发层系。为明确该层段的油气分布规律及勘探前景,利用岩心、测井和分析化验等资料,研究了不同沉积相的特征及平面展布。综合分析认为该区主要发育近岸水下扇、辫状河三角洲、三角洲、重力流、碳酸盐岩台地等多种沉积相类型,预测出近岸水下扇扇中、辫状河三角洲前缘、三角洲前缘、重力流水道、碳酸盐岩台地生物碎屑滩、云灰坪等是有利的储集相带。

Es1 in Huanghua Depression was an exploration and development zone where oil was of the highest content and reservoir distribution was stable.To clarify the hydrocarbon distribution rules and its exploration prospects,core,well logging and analytical data were used to study different sedimentary characteristics and its plane distribution.Study shows that nearshore subaqueous fan,braided delta,delta,turbidity currents,carbonate platform and lacustrine facies were developed in Huanghua Depression.The favorable oil-bearing facies belts are predicted,which include the central part of nearshore subaqueous fan,braided delta front,delta front,channels of turbidity currents,organic bank,dolomite and carbonate plateau of carbonate platform.