松辽盆地北部西斜坡区萨尔图(S)油层段储层特征研究

根据大量岩石薄片、X衍射、扫描电镜、物性、重矿物等资料,结合储层物性测井参数解释结果,对西斜坡区萨尔图油层(S)储层的岩性组成、成岩作用、物性特征、孔隙类型等进行了综合研究,拟合并建立了砂体孔渗预测的物理模型。指出西斜坡区储层为一套中-高孔、中渗储层,其岩性组成及成岩程度有利于次生孔隙发育,同时,粘土矿物之间、长石等原生矿物与粘土矿物之间的次生演化作用也是决定该储层物性条件的主控因素之一;自生伊利石富集带可作为寻找次生孔隙带的发育标志。综合储层的岩性、物性、成岩后生作用和孔渗条件等特征,将萨尔图(S)油层段储层划分为Ⅰ(好)、Ⅱ(一般)、Ⅲ(差)、Ⅳ(极差)4大类,指出研究区内主要发育Ⅰ、Ⅱ类储层,富拉尔基至齐齐哈尔一线以北及西部超覆带应是西斜坡区萨尔图油层组油气勘探的有利地区,油气运移路径上的各种圈闭及次生孔隙发育带均应是油气下一步勘探的有利目标。

RESEARCH OF RESERVOIR CHARACTERISTICS OF SAERTU RESERVOIR IN WEST SLOPE REGION OF NORTH PART OF SONGLIAO BASIN

According to much datum of rock thin section,X diffraction,physical property and heavy mineral,combining with explaining results of well logging about reservoir physical property,this paper studied synthetically many aspects of Saertu reservoir in west slope region,such as diagenesis,lithological combination,feature of physical property and pore type,matched and established physical model for forcasting porosity and permeability of sands.It concluded that reservoir in west slope region has middle-high poros...