北非锡尔特与佩拉杰盆地油气资源潜力分析  

Future exploration directions of Sirte Basin and Pelagian Basin in North Africa

作　　者：汪焰[1] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083

出　　处：《石油实验地质》2014年第4期459-464,共6页Petroleum Geology & Experiment

基　　金：中国石化集团国际石油勘探开发有限公司项目"北非地区油气资源潜力及投资目标研究"(SIPC-2011-02-023-B)资助

摘　　要：详细对比了同属于北非裂谷盆地的锡尔特盆地和佩拉杰盆地的构造沉积演化历史和含油气系统要素特征,分析了2个相似构造背景盆地的油气发现规模和资源潜力巨大差异的具体原因。认为短暂但是强烈的裂谷活动历史和后期稳定的热沉降,造成了锡尔特盆地烃源岩品质好、成熟度高、构造圈闭发育、各时期储层保存较好的特点,从而成藏条件优越;将来勘探重点仍然是成熟地区的构造圈闭,并可延伸勘探岩性圈闭,潜力大风险小。而佩拉杰盆地由于裂谷活动弱、缺乏稳定的沉积中心等原因,不具备这些条件,因而仍然以寻找岩性圈闭和低幅构造圈闭为主,潜力一般。The Sirte and Pelagian Basin are two neighboring rift basins in North Africa. A detailed comparison on the tectonostratigraphic development and characteristics of petroleum system elements of the two basins is per- formed to reveal the reasons for their large differences in both petroleum discovery and potential. As to the Sirte Basin, the relatively short but intensive rifting and stable tectonic environment afterwards are the major drives for its excellent source rock quality, good maturity, well-developed structure traps, and well preservation of multiple reservoirs. Thus the Sirte Basin＇ s exploration potential is on the mature exploration area, with proven source and reservoir, while trap style may be extended to stratigraphic traps. In contrast, the Pelagian Basin failed to experi- ence a strong rifting activity and to acquire a stable depositional center, missing the favorite petroleum accumulation conditions enjoyed by the Sirte Basin. It has only small-scale structure and stratigraphic targets with limited exploration potential.

关 键 词：裂谷活动 含油气系统 勘探潜力 锡尔特盆地 佩拉杰盆地 北非裂谷盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]