论文部分内容阅读
通过岩心描述和分析 ,确定了侯市地区长 6油层河控三角洲沉积体系 ,主要沉积微相为三角洲前缘分流河道、分流河口砂坝、前缘砂席和分流间等 ,分流河道和河口砂坝是本区占主导地位的骨架砂体 .在图像粒度分析的基础上 ,通过绘制概率累积曲线、C- M图、散点图和环境判别图 ,对该区砂体形成的水动力条件及形成环境进行了分析 .长 6油层的三角洲体系代表了较为完整的自旋回 ,这一自旋回形成的原因主要是分流河道迁移、袭夺、决口以及因压实的均衡调整等 ,从而形成三角洲复合体内部各分流三角洲砂体的相互叠置交错 .根据岩心微相分析、小层砂体形态和测井剖面对比分析 ,对该区长 6油层砂组及小层的沉积微相进行了研究 ,掌握了沉积微相的时空展布和变化规律 .
Through core description and analysis, the sedimentary system of river delta in Chang 6 reservoir of Houshi area is determined. The main sedimentary microfacies are delta front distributary channel, distributary estuary sand bar, leading edge sand mat and diversion chamber, etc. The distributary channel and estuary sand The dam is the dominant sand body in this area.Based on the image granularity analysis, the hydrodynamic conditions for the formation of sand body in this area are established by plotting the probability cumulative curve, C- M map, scatter plot and environmental discrimination map, The formation of the environment was analyzed.The delta system of the Chang 6 oil layer represents a relatively complete spin-back, the formation of this spinback mainly due to migration of the distributary channel, capture, burst port and due to compaction equilibrium adjustment, etc., to form a delta complex According to the analysis of core microfacies and the comparison of the shape and logging profile of small sand body, the sedimentary microfacies of Chang 6 oil sand group and small layer in this area are studied, Grasp the spatial and temporal distribution and variation of sedimentary microfacies.