西北地质2024，Vol.57Issue(2)：174-183,10.DOI:10.12401/j.nwg.2023143
南非奥特尼夸盆地构造沉积演化与油气成藏
Tectonic and Sedimentary Evolution and Hydrocarbon Accumulation in the Outeniqua Basin,South Africa
摘要
Abstract
The degree of oil and gas exploration of Outeniqua Basin in South Africa is extremely low.The suc-cessive natural gas discoveries in 2019 and 2020 attracted extensive attention from oil and gas companies at home and abroad.Based on IHS database,assessment results of new ventures and literatures,comprehensive analysis shows that:The Outeniqua Basin experienced four evolutionary stages since the Permian period:pre-rift stage,syn-rift stage,transitional stage and post-rift stage;It mainly deposited continental clastic rocks in rift stage and marine clastic rocks in transitional stage and post-rift stage;The main source rocks in the basin are the marine shale of the Hauterivian period and Barremian-Aptian period;Two sets of important reservoirs,namely,the shallow marine sandstone at the top of the Valanginian in the syn-rift stage and the marine deep-water clas-tic rock of the Albian during the early drift period are developed,and the reservoir-seal combination conditions are superior;Four sets of reservoir-forming assemblages(plays)are formed,including Barremian-Albian sand-stone,Valanginian-Hauterivian sandstone,Upper Jurassic-Lower Cretaceous sandstone and basement;The dis-tribution of oil and gas is"more in the west and fewer in the east".At present,the exploration focus should be on Cretaceous lenticular turbidite sandstone in deep-water area of the continental margin of the Bredasdorp Sub-basin.关键词
奥特尼夸盆地/南非/大气田/深水/成藏组合/浊积岩Key words
Outeniqua basin/South Africa/giant gas field/deep water/play/turbidite sandstone分类
天文与地球科学引用本文复制引用
肖坤叶,秦雁群,刘计国,胡瑛,张新顺..南非奥特尼夸盆地构造沉积演化与油气成藏[J].西北地质,2024,57(2):174-183,10.基金项目
中国石油天然气股份有限公司科学研究与技术开发项目(2021DJ3103),中油国际技术研发项目(2023-YFJJ-01),中国石油天然气股份有限公司重大科技专项课题"非常规油气技术可采资源差异化评价技术研究"(2023ZZ0703),中国石油天然气股份有限公司基础性前瞻性重大科技专项课题"基于大数据的常规油气可采资源智能化评价技术研发"(2023ZZ0702). （2021DJ3103）
