摘要
以官南地区上三叠统须家河组储层为研究对象,在实测剖面和详细观察岩心的基础上,从沉积相特征、岩性特征以及储集空间类型、孔隙结构类型、储集物性等方面对储层进行了研究。指出:须家河组储集岩主要为中—细粒石英砂岩,主要形成于湖泊三角洲前缘环境,储集空间主要为粒缘缝、次生粒间孔、次生粒内孔及填隙物晶间孔,孔隙度在2%~4%之间,渗透率在0.011mD^0.729mD之间,储层类型为裂缝—孔隙型。并从成岩、沉积及构造方面对储层的影响进行了分析,认为须家河组储集岩以Ⅲ—B、Ⅲ—C类为主。
In the Upper Triassic Xujiahe Formation reservoirs of southern Guandu, the sedimentary facies and lithological characteristics, reservoir space and pore structure types as well as reservoir properties have been studied based on both real tested profiles and detailed core description. The studied result illustrates that the reservoir rocks of Xujiahe Formation are mainly composed of medium-to fine-grained quartzose sandstone forming dominantly at both lacustrine and delta fronts. Moreover, reservoir space is mainly grain-edge fractures, secondary intergranular and intragranular pores as well as interstitial intercrystalline pores with the porosity varying from 2% to 4% and the permeability from 0.011 mD to 0.729 mD, respectively. Reservoirs belong to fracture-porous type. An analysis of the effect of diagenesis, sedimentation and tectonism on reservoirs shows that reservoirs rocks of Xujiahe Formation are mainly type III-B and type III-C.
出处
《天然气勘探与开发》
2007年第3期1-4,13,共5页
Natural Gas Exploration and Development
基金
四川省重点学科建设项目(编号:SZD0414)资助
关键词
孔隙结构
储层特征
成岩作用
沉积作用
上三叠统
须家河组
四川盆地
pore structure, reservoir characteristics, diagenesis, sedimentation, Upper Triassic, Xujiahe Formation, Sichuan Basin
