摘要
为查明歧南断阶带沙河街组不同层位储层物性差异的原因,更好地指导区域内油田开发,以岩心、室内实验数据及薄片资料为基础,对歧南断阶带沙河街组储层特征及其物性主控因素进行了研究。结果表明:歧南断阶带沙河街组储集空间以次生粒间孔隙为主,储层属中孔中低渗型,沙二段物性好于沙一段及沙三段。物性主控因素主要包括沉积及成岩作用,沉积作用决定了沙河街组各层位储层原始物性的好坏,成岩作用在前者的基础上对储层物性进一步改造。利用聚类分析方法筛选出6个储层物性主控参数,建立了储层综合评价指数,据此对沙河街组储层进行了分类和展布预测。结果表明,沙河街组内储层共发育4种类型,其中沙二段主要发育Ⅰ类及Ⅱ类储层,沙一段主要发育Ⅲ类及Ⅳ类储层,沙三段主要发育Ⅱ类和Ⅲ类储层。
In order to find out the reason of physical properties difference and to guide the development of oilfields in the study area,reservoir properties controlling factors of Shahejie Formation in Qinan fault step belt were studied on the basis of core observation,thin section analysis and lab experimental data. Results show that the reservoir space of the Shahejie Formation in Qinan Fault step belt is mainly of secondary denudation pore, and the Shahejie Formation belongs to medium porosity and low to medium permeability reservoir. The reservoir properties in the Es2 Formation are much better than Es1 and Es3 Formation. Sedimentation and diagenesis are main controlling factors of reservoir properties, the sedimentation determines the original property of the reservoir,and the diagenesis affects reservoir properties furtherly. Six controlling factors of reservoir physical properties are classified by means of clustering analysis, and the evaluation index was finally established. On this foundation, the reservoir types of Shahejie reservoir were classified and the reservoir distribution was also predicted. According to the evaluation result, the reservoir in the study area can be divided into four types. The Es2 Formation mainly developed Ⅰ and Ⅱ types of reservoir. Ⅲ and Ⅳ types of reservoir mainly developed in Es1, The reservoir type of Es3 Formation is mainly Ⅱ and Ⅲ types.
作者
李振鹏
张国坤
汪跃
聂玲玲
李浩
LI Zhenpeng;ZHANG Guokun;WANG Yue;NIE Lingling;LI Hao(Tianjin Branch of CNOOC Ltd., Tianjin 300459, Chin)
出处
《断块油气田》
CAS
北大核心
2018年第3期294-299,共6页
Fault-Block Oil & Gas Field
基金
国家科技重大专项课题"渤海油田加密调整及提高采收率油藏工程技术示范"(2016ZX05058-001)
关键词
储层物性主控因素
储层评价
沙河街组
歧南断阶带
reservoir main controlling factors
reservoir evaluation
Shahejie Formation
Qinan Fault step belt
