合水地区长7储层沉积微相及油气富集规律  

Sedimentary microfacies and hydrocarbon accumulation enrichment law of Chang7 reservoirs in Heshui area, Eastern Gansu

作　　者：易萍[1,2] 朱保定[3] 吴育鹏[4] 王石头[1,2] 薛芳芳[1,2] 

机构地区：[1]中国石油长庆油田分公司油气工艺研究院,710018 [2]低渗透油气田勘探开发国家工程实验室 [3]中国石油长庆油田分公司勘探开发研究院 [4]中国石油长庆油田分公司第六采油厂

出　　处：《低渗透油气田》2016年第2期18-23,75,共7页

摘　　要：合水地区长7储层是近年来长庆油田致密油开发攻关的重要区块之一．但其沉积相研究程度相对较低，砂体展布规律研究不深入。制约了该区致密油储层的开发动用。为了寻找高效储层。筛选有利目标区．合理评价部署，提高钻井成功率和单井产量。依据野外露头、岩心、测井及相关测试资料，对该区长7储层的物源分析、沉积相标志、沉积相类型及特征、沉积微相及平面展布特征等进行详细研究，认为该区长7储层以砂质碎屑流沉积为主，储油砂体主要为低黏滞性砂质碎屑流沉积，砂体厚度大，分选好，物性及含油性好，为主力产油分布区。平面上有利油气富集砂体展布方向与物源方向相垂直，是研究区下步油气开发的主要方向。The Chang7 reservoirs in Heshui area is one of the important blocks for the development of tight oil in Changqing oilfield in recent years, but its sedimentary facies research degree is relatively low. The study of the sandbody distribution law is not deep. These restrict the development of the tight reservoirs in this area. In order to find the efficient reservoirs, select favorable target areas, reasonably evaluate the arrangement of the well locations, and improve the success rate of drilling and individual well production, based on the field outcrops, cores, well logging and related test data, this paper studied in detail the characteristics of the Chang7 reservoirs, such as the provenance analysis, sedimentary facies symbol, sedimentary facies types and characteristics, sedimentary microfacies and plane distribution characteristics. It is believed that the Chang7 reservoirs are dominated by arenaceous detrital flow deposition. The reservoirs are mainly composed of low-viscosity arenaceous detrital flow deposition, with large thickness of sand bodies, good sorting, good physical and oil- bearing properties, and are the main producing areas. The direction of distribution of the favorable hydrocarbon enriched sandbodies is perpendicular to the direction of provenance, which is the main direction of oil and gas development in the study area.

关 键 词：致密油 低黏滞性砂质碎屑流 沉积微相 长7储层 合水地区 鄂尔多斯盆地 

分 类 号：P618.13[天文地球—矿床学]