鄂尔多斯盆地延长组长7段致密油微观赋存形式定量研究  

Quantitative research on tight oil microscopic state of Chang 7 Member of Triassic Yanchang Formation in Ordos Basin, NW China

作　　者：王明磊[1,2] 张遂安[1] 张福东[2] 刘玉婷[2] 关辉[2] 李君[2] 邵丽艳[2] 杨慎[2] 佘源琦[2] 

机构地区：[1]中国石油大学(北京)石油工程学院 [2]中国石油勘探开发研究院廊坊分院

出　　处：《石油勘探与开发》2015年第6期757-762,共6页Petroleum Exploration and Development

基　　金：国家油气重大专项(50430503;2011ZX05007-002)

摘　　要：结合核磁共振与微米—纳米CT扫描技术,对鄂尔多斯盆地三叠系延长组长7段致密油微观赋存形式开展定量研究。利用核磁共振技术确定致密油在储集层中赋存量,测得原始含油饱和度为63.99%;利用CT扫描技术获取致密油储集层二维切片图像,经数字合成处理得到三维立体图像,据此将储集层中致密油分为薄膜状、簇状、喉道状、乳状、颗粒状和孤立状6种赋存形式。定量计算各种赋存形式致密油的含量发现,乳状和薄膜状致密油为主要的赋存形式,二者约占储集层中致密油总量的70%,其次为簇状和颗粒状致密油,孤立状和喉道状致密油含量低,各种赋存形式致密油含量与储集层原始含水饱和度、黏土矿物含量、孔隙结构等有关。With nuclear magnetic resonance（NMR） and micrometer-nanometer CT Scanning technology, quantitative research was carried out of the micro-existing state of tight oil in the Chang7 Member of the Triassic Yanchang Formation in the Ordos Basin. The total reserves of the tight oil in the reservoirs were determined using NMR technology. The initial oil saturation was measured as 63.99%. The 2-D slice images of the tight oil reservoirs were obtained using CT Scanning technology, and the 3-D images were acquired after digital synthesis processing. Accordingly, the existence states of the tight oil in the reservoirs are divided into six types, namely thin film form, cluster form, throat form, emulsion form, particle form and isolation form. It is found by quantitative calculation of the contents of tight oil in different existence states of tight oil that the emulsion form and thin film form are the main existence states, which account for 70% of the total amount of the tight oil in the reservoirs, followed by the cluster and particle forms. The contents of isolation form and throat form tight oil are low. The contents of tight oil in various existence states are related to initial water saturation, clay mineral content and pores structure of the reservoirs.

关 键 词：致密油 微观赋存形式 定量研究 鄂尔多斯盆地 延长组 

分 类 号：TE122[石油与天然气工程—油气勘探]