大庆长垣S区储层微观孔隙结构类型划分及特征分析  

Type division and reservoir characteristics of micro-pore structure in S area of Daqing placantieline

作　　者：裴占松[1] 周志国[1] 常玮[1] 张雁[2] PEI Zhansong;ZHOU Zhiguo;CHANG Wei;ZHANG Yan(No.1 Oil Production Plant of Daqing Oilfield Co.,Ltd.,PetroChina,Daqing,Heilongjiang 163001,China;School of Earth Sciences,Northeastern University of Petroleum,Daqing,Heilongjiang 163318,China)

机构地区：[1]中国石油大庆油田有限责任公司第一采油厂,黑龙江大庆163001 [2]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《石油地质与工程》2022年第2期82-87,共6页Petroleum Geology and Engineering

基　　金：国家科技重大专项(2016ZX05010-002)。

摘　　要：大庆油田长垣储层类型多样,物性变化宽泛,动用状况不均,宏观研究已经不能满足特高含水期油田开发需求,利用S区725块岩心样品的分析资料,对储层微观孔隙结构类型及特征进行分析。结果表明,特征结构系数、平均孔喉半径、最小连通孔喉半径、相对分选系数、大小孔喉斜率分布比值五个参数与孔隙度、渗透率相关性最好,可以作为微观孔隙结构分类和评价的主要参数,结合储层物性,将S区储层微观孔隙结构划分为五种类型;在铸体薄片、扫描电镜、压汞曲线等对比分析的基础上,详细描述了不同微观孔隙结构之间的差异;并从压实、胶结、溶蚀三个方面分析了成岩作用对微观孔隙结构的影响,从成因上阐述了不同类型微观孔隙结构之间的差异性。该成果对深化不同储层内部微观孔隙结构特征的认识,确定微观剩余油分布规律奠定了基础。The reservoir types of Daqing placantieline are diversified,the physical properties change widely,and the production status is uneven.The macro research cannot meet the needs of oilfield development in ultra-high water cut stage.Based on the analysis data of 725 core samples in S area,the types and reservoir characteristics of micro-pore structure are analyzed.The results show that the average pore throat radius,relative sorting coefficient,characteristic structure coefficient,minimum connecting radius and the slope ratio of large and small pore throat distribution have the best correlation with porosity and permeability,and can be used as the main parameters for the classification and evaluation of micro pore structure,and the micro-pore structure of reservoir in S area is divided into five types.According to the comparative analysis of casting thin section,scanning electron microscope and mercury injection curve,the differences of different micro-pore structures are described in detail.Meanwhile,the influence of diagenesis on the characteristics of five types of pore structure is analyzed from three aspects of compaction,cementation and dissolution,and the differences between different micro pore structures are expounded from the perspective of genesis.The results lay a foundation for deepening the understanding of the characteristics of micro-pore structure in different reservoirs and determining the distribution law of micro remaining oil.

关 键 词：大庆长垣 微观孔隙结构 类型划分 储层特征 

分 类 号：TE112.23[石油与天然气工程—油气勘探]