商741断块沙一段火山岩储层特征及有利层位

Characteristics of vocanic rock reservoir and prediction of favorable stratigraphic position

王明健1 国景星 梁金萍

中国地质大学能源学院，北京 100083 中国石油大学地球资源与信息学院，山东 东营 257061 胜利油田分公司地质科学研究院，山东 东营 257015

School of Energy Resources, China University of Geosciences, Beijing 100083, China College of Geo-Resources and Information, China University of petroleum, Dongying  257061, China Geological Scientific Research Institute, Shengli Oilfield Company, SINOPEC, Dongying  257015, China

在前人研究的基础上，综合利用岩心、薄片、扫描电镜等资料，从火山岩的岩性、岩相特征、孔隙类型及储层物性等方面入手，深入研究了惠民凹陷商741断块沙一段火山岩储层特征。研究发现该区火山岩的形成由构造运动控制，自下而上可划分为6期；岩性主要为正常的火山碎屑岩类、沉积火山碎屑岩类和火山碎屑沉积岩类；研究区沙一段火山岩属于爆发相，可划分为火山口、近火山口、远火山口和火山沉积4个亚相；储集空间主要为原生孔隙和裂缝、溶蚀孔隙和构造裂缝；储集物性主要受岩相、岩石类型、成岩作用和构造运动影响。基于以上认识，结合储层物性资料和试油资料，预测了沙一段火山岩储层的有利储集层位，从而为后期的油气开发提供了依据。

Based on the research of previous specialist, this article studies the characteristics including lithologic characteristics, lithofacies characteristics, pore types, reservoir physical property of vocanic rock in section 1 of Shahejie Formation of Shang 741 Block which is located in Huimin Depression by using the core data, thin section data and scanning electron microscope data. The results indicate that the formation of vocanic rock is controlled by tectonic movement and the vocanic rock can be devided into six stages from bottom to top. The principal lithologic types are volcaniclastic rock, sedimentary volcanic rock and pyroclast sedimentary rock. The vocanic rock in the studying area is formed by volcanic eruption and can be divided into four intrafacies which are crater, proximal crater, distal crater and volcanogenic sedimentation. Storing space mainly are primary pore, primary fracture, dissolution pore and structural fracture. The reservoir quality are affected by lithofacies, rock type, lithogeny and posterior tectonic movement. Base on the above studying results, we conclude the favorable stratigraphic position of vocanic rock by analyzing the physical property data and well testing data comprehensively and provide the criteria for the following exploitation.