麻江志留系古油藏储层特征及影响因素  

Characteristics and main controlling factors of reservoirs of Silurian paleopool in Majiang

作　　者：牛会玲[1] 谢润成[2] 赵安坤[2] 金文辉[2] 

机构地区：[1]中国石化西北油田分公司勘探开发研究院,乌鲁木齐830011 [2]"油气藏地质及开发工程"国家重点实验室.成都理工大学

出　　处：《石油地质与工程》2011年第4期32-35,6,共4页Petroleum Geology and Engineering

摘　　要：基于野外露头剖面、地面样品测试及部分钻井资料的分析,对麻江地区志留系翁项群组储层特征、影响因素进行研究。其结果表明:该区翁项群组砂岩为中-低孔、渗储层,砂岩以成分成熟度较高的岩屑石英砂岩和石英砂岩为主;储集空间类型以原生粒间孔和粒间溶孔为主,孔喉结构中等;地面样品残余含油饱和度普遍较低,平均为10.07%;研究区内残余饱和度的分布受古构造和岩性变化的控制,储层性质主要受到陆源碎屑组分和成岩作用的影响,陆源碎屑的结构和含量是影响储层储集物性直接因素;成岩作用中的机械压实作用和胶结作用使储层变差,溶蚀作用使储层物性得到改善。The reservoir characteristics and influential factors of Wengxiangqun formation are studied based on analysis of outcrop observation,the testing materials of ground samples in combination with drilling materials in Majiang area.The results shows the sandstones of Wengxiangqun formation is the reservoir with middle - low porosity and permeability, the sandstone with a high degree of compositional maturity consists mainly of Lithic - quartz sandstone and quartz sandstone, the pores of the reservoir are mostly primary intergranular pores and intergranular dissolution pores,the characteristics of the pore structure is moderate pore-throat composition.Ground samples average residual oil saturation is 10.07%and it is generally low.Distribution of residual oil saturation is controlled by palaeohigh and lithologic change. The character of reservoir is mainly formed by terrigenous clastics composition and diagenesis,the structure and content of terrigenous clastics composition are direct factors affecting reservoir physical property,compaction and cementation of diagenesis mainly make reservoir varied,while denudation makes reservoir physical property become better.

关 键 词：麻江地区 翁项群组 储层物性 残余饱和度 成岩作用 

分 类 号：TE112.23[石油与天然气工程—油气勘探]