鄂尔多斯盆地延长组长7致密油储层微观特征.pdf

文档介绍：第26卷第3期 2014年6月岩性油气藏 UTHOLOGIC RESERVOIRS Vol-26 文章编号:1673—8926(2014)03—0079—05 鄂尔多斯盆地延长组长7致密油储层微观特征王秀娟1,王明磊2,赵爱彬1 (,西安710018;,河北廊坊065007) 摘要:针对鄂尔多斯盆地致密油储层特征,利用纳米级CT扫描、场发射扫描电镜、恒速压汞以及核磁共振等技术,对该储层孔隙、喉道以及孔喉配置关系等微观特征进行了系统研究。结果表明:孔隙大小决定了致密油储层的储集能力,鄂尔多斯盆地延长组长7致密油储层的平均孔隙半径为15~20¨m,:喉道大小是储层开发下限的主要制约因素,长7致密油储层的喉道半径主要为 ~¨m,储层中60%~¨m的喉道所控制;在物性较好的储层中,连通性较好的大喉道占30%~40%,而且喉道半径≥¨m,而在物性较差的储层中,喉道细小,连通性差的喉道约占60%,而且喉道半径<。关键词:致密油储层;纳米级CT扫描;开发下限;储层微观特征;鄂尔多斯盆地中图分类号: 文献标志码:A Microscopic characteristics 0fChang 7tightsand咖ne reserVoir inOrdos Basin WANG)(iujuaIll,WANG Minglei2,ZHAo~binl ( changqing pany,xi’an 710018,china; Research Institute of Petmleum Explomtion&Development—Lang‰g,Langfang 065007,Hebei,china) Abstmct:According tothechamcteristics oftight resenroir in0rdos Basin,based on FESEM,nanometer CT,rate- contmlled mercury ration and NMR,this paper systematically studied thecharacteristics ofreseⅣoirpore,throat and therelationship between pore resultshows thatthesizeofporesdete瑚ines thereservoir capacity oftight oilreservoir,the average poreradius啪ges from 15斗m to20斗m,and theaVemge pore Volume throatsize isthemain restrictedfactorfordevelopment throatsizeranges ,and the throats mnging between and control 60%of moVable