摘要
也门马里卜—夏布瓦盆地是在板块分离产生的剪切应力场背景下拉张形成的一种被动裂谷盆地,不同于地幔上涌产生的主动裂谷。该盆地中生代经历了先强后弱两期裂陷作用,发育两套生油岩,其中第一裂谷期Lam-Meem组是主力生油层。盆地中发育6套成藏组合,其中以Lam组砂岩和Alif砂岩为储层、Lam组泥岩和Sabatayn组盐岩为区域盖层的组合是盆地内的主要成藏组合,反向断层翘倾断块、盐构造和披覆背斜为主要圈闭类型。研究表明,马里卜—夏布瓦盆地具有优越的油气成藏条件和较好的勘探前景。
Marib-Shabwah Basin is a passive rift basin. It was resulted from the extensional tectonics of shear stress field. It is different from active rift basins formed by the uplift of mantle convection. The Mesozoic Era of the basin underwent two phases of rift, i.e., firstly strong and then weak. There are two sets of source rocks. Lam-Meem Formation generated in the first rift phase is the major source bed in the basin. Six hydrocarbon accumulation assemblages developed in the basin. The assemblage of Lam sandstone and Alif sandstone and the assemblage of Alif sandstone and Sabatayn regional cap rock formed the chief oil-bearing beds. The main traps include titled antithetic normal faults, drape traps, and salt structures. Research shows that Marib-Shabwah Basin has favorable hydrocarbon accumulation conditions and broad prospect for exploration.
出处
《中国石油勘探》
CAS
2007年第6期58-62,共5页
China Petroleum Exploration
基金
国家教育部重点科技研究项目(10404)资助
