西北地质2018，Vol.51Issue(1)：272-276,5.
延长油田东北部延长组宏观天然裂缝古地磁定向分析
Paleomagnetic Orientation Analysis of Macroscopic Natural Fractures at Yanchang Formation in Northeast Yanchang Oilfield
摘要
Abstract
Chang 6 oil layer group of Triassic Yanchang Formation in northeast Yanchang oilfield is a typical kind of ultra-low permeability reservoir,in which the natural fractures are widespreadly developed.The development extent and direction of these fractures are the key factors in oilfield water injection development and well pattern arrangement.In this paper,we introduce the technique of paleomagnetic determination of core samples has been introduced to determine the orientation of fractures,which can provide a basis for flooding pattern arrangement.The study suggests that the fractures are mostly formed during Yanshanian period and Himalayan period,in which the fractures formed in Yanshanian period are basically E-W and S-N trending regional fractures,while the fractures formed in Himalayan period are basically N-E trending fractures.Chang 6 reservoir fractures are mainly structural fractures,with high-angle,tensional and vertical characteristics,including various shapes,such as unsealed fractures,half-sealed fractuies and sealed fractures.Around 58％ of the Chang 6 reservoir fractures are N-E trending,33％ of the fractures are N-W trending,and the others are one E-W trending fracture and one S-N trending fracture,accounting for 8％.关键词
延长油田/延长组/裂缝/古地磁定向Key words
Yanchang oilfield/Yanchang formation/fracture/paleomagnetic orientation分类
天文与地球科学引用本文复制引用
雷俊杰,辛江,贺志亮..延长油田东北部延长组宏观天然裂缝古地磁定向分析[J].西北地质,2018,51(1):272-276,5.基金项目
国家示范工程项目“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(No.2011ZX05044)、中国博士后基金“鄂尔多斯盆地南部特低渗储层精细评价及地质模型研究”项目(20070420489)联合资助 （No.2011ZX05044）
