辽河油田滩海西部古近系碎屑岩储层特征及主控因素分析  

Characteristics and Controlling Factors of Paleogene Clastic Rocks in the West Sag of the Beach Area in Liaohe Oilfield

作　　者：刘媛媛[1] 郭彦民[1] 邹丙方[1] 吴兴录[1] 邹文海[1] 杜庆国[1] 崔琳[1] 

机构地区：[1]辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《现代地质》2012年第3期569-574,共6页Geoscience

基　　金：中国地质大学地质过程与矿产资源国家重点实验室科学基金项目(GPMR0936);河南省科技发展计划项目(2010-021);河南省有色金属地质矿产局科技创新项目(ysdk2010-6)

摘　　要：辽河滩海西部凹陷古近系储层岩石类型以长石岩屑砂岩、岩屑长石砂岩及岩屑砂岩为主,成熟度低,具有近源、多源的沉积特点。储层孔隙类型包括原生孔隙、次生孔隙及混合型孔隙,孔渗相关性好。研究区储层孔渗数据统计表明,在1 500～2 800 m及2 800～3 500 m深度范围内存在两个孔隙度及渗透率异常高值带。储层的储集性能受原始沉积作用及后期成岩改造共同控制。储层发育机械压实、胶结、溶解及交代4种成岩作用,各种成岩作用此消彼长控制着孔隙演化的4个阶段。储层物性变化环洼陷分带性明显,综合分析储层分布、性质及油源等多方面因素,将储层划分为外带、中带及内带,分别对应Ⅱ类、Ⅰ类及Ⅲ类储层。The lithology of Paleogene reservoirs in the west sag of the beach area in Liaohe oilfield is primarily feldspathic lithic sandstone, lithic sandstone and lithic sandstone with low maturity. The reservoirs were deposi- ted with multiple provenances and near these provenances. The reservoir pores are sorted into primary, seconda- ry and hybrid pores, and the porosity and permeability have good correlation to each other. The relevant statis- tics indicate that there are two abnormally high-value zones of porosity and permeability in the intervals of 1,500 - 2,800 m and 2,800 - 3,500 m. The storage performance of reservoirs was controlled by both primary deposi- tion and later diagenesis reconstruction. These reservoirs had undergone four types of diagenesis, i. e. mechan- ic compaction, cementation, dissolution and replacement, and the mutual reaction of these diagenesis controlled four phases of pore evolution. The reservoir properties changed in an apparent zonation pattern around the sag. After the comprehensive analysis on reservoir distribution and properties, and hydrocarbon kitchens, the reser- voir zonation could be divided into outer, intermediate and inner zones, in correspondence with reservoirs of Ⅱ, Ⅰ and Ⅲ, respectively.

关 键 词：碎屑岩 储层特征 主控因素 滩海西部凹陷 辽河油田 

分 类 号：TE122.2[石油与天然气工程—油气勘探]