雷家地区碳酸盐岩储层特征及主控因素研究  

Carbonate Reservoir Properties and Main Controlling Factors in Leijia

作　　者：单俊峰[1] 周艳[1] 康武江[1] 薄强[2] 

机构地区：[1]中国石油辽河油田分公司,辽宁盘锦124010 [2]昆明理工大学,云南昆明650093

出　　处：《特种油气藏》2016年第3期7-10,151,共4页Special Oil & Gas Reservoirs

基　　金：国家油气重大专项"渤海湾盆地精细勘探关键技术"(2011ZX05006)

摘　　要：通过薄片鉴定、物性测试、压裂实验等方法,对雷家地区沙四段湖相碳酸盐岩储层进行了分析。研究表明:高升地层主要发育泥晶粒屑云岩、含泥粒屑泥晶云岩和泥质泥晶云岩,杜家台地层主要发育含泥泥晶云岩和含泥方沸石质泥晶云岩;储层为致密型,储集空间类型多样,裂缝控制"甜点"发育;岩石脆性随着泥质含量的增加和方沸石含量的减小而降低。储层受沉积、成岩和构造作用共同控制,沉积作用控制了储层的岩性、厚度及原始孔隙结构等特征,胶结充填作用使储层致密化,溶蚀作用存在形式多样,多与裂缝发育相关,构造作用和溶蚀作用是形成优质储层最主要的控制因素。该项研究划分了该套储层的"甜点"区域,可为下一步油气勘探提供依据。Thin-section analysis,physical property test and fracturing experiment are used to analyze the Sha4 lacustrine carbonate reservoirs in Leijia.Research shows that Gaosheng formation mainly consists of grained dolomicrite,dolomicrite containing mud grain and muddy dolomicrite,and Dujiatai formation mainly consists of muddy dolomicrite and muddy analcite dolomicrite. The tight reservoir contains multiple types of reservoir space and the development of'sweet-spot'is controlled by fracture. The rock brittleness decreases with the increase of shale content and the decrease of analcite content. Reservoir is jointly dependent on deposition,diagenesis and tectonism. Reservoir rock lithology,thickness and original pore structure are dependent on deposition and reservoir is densified by cementation and filling. There are multiple types of dissolutions which are associated with fracture development. High-quality reservoir development is mainly dependent on tectonism and dissolution. This research could provide certain reference for hydrocarbon exploration in Leijia.

关 键 词：白云岩 致密储层 裂缝 控制因素 雷家地区 

分 类 号：TE121.2[石油与天然气工程—油气勘探]