摘要
宽扎盆地位于非洲西海岸,包括2个构造单元:本格拉次盆和宽扎主体盆地,宽扎主体盆地又可分为3个构造变形区域:盐伸展区、盐转换区和盐挤压区。盆地经历了晚侏罗世-早白垩世巴列姆期的裂谷阶段、阿普第期的过渡阶段及晚白垩世至今的被动大陆边缘阶段;形成盐下、盐间和盐上三套沉积层序,相应具有盐下、盐间和盐上三套含油气系统。本文通过对盆地地质特征的研究,总结了盐下、盐间和盐上油气成藏主控因素,指出了勘探有利区。
Kwanza basin lies on the west coast of Africa, consist of 2 sub basins： Bengela and Kwanza main basin. Kwanza main basin are divided into 3 tectonic transform belts, salt extend belt, salt transition belt and salt compressional belt. Kwanza basin has three major evolution phases, Rift phase during late Jurassic to early Cretaceous, Transition phase during Aptian, Drift phase from late Cretaceous to now. Accordingly, the filled stratigraphy including the pre--salt sequence, the intra--salt sequence and the post --salt sequence. There are pre--salt petroleum system, the intra--salt petroleum system and the post--salt petroleum system. This article investigates the geologic character of Kwanza basin, summarizes its control on Hydrocarbon accumulation of pre--salt, salt and post--salt sequence, figures out the favorable exploration area.
出处
《内蒙古石油化工》
CAS
2008年第24期175-179,共5页
Inner Mongolia Petrochemical Industry
关键词
宽扎盆地
盐下
盐间
盐上
地质特征
油气成藏
Kwanza basin
pre-salt
intra-salt
post-salt
geologic character
hydrocarbon accumulation
