也门马里卜-夏布瓦盆地基底裂缝型油藏特征研究

Characteristic of Fractured Basement Reservoir in Marib-Shabawa,Yemen

也门马里卜-夏布瓦盆地是在阿拉伯板块与冈瓦那大陆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。2004年以前勘探盆地以Alif砂岩下生上储、Lam组自生自储和Qishn组、Shuqra组上生下储为主。随着勘探的深入,基底裂缝型油藏勘探自2004以来在也门3\4\7\10\14\43\51\S1\S2区块获得重大突破,钻探揭示了含油幅度1 200 m左右储量,规模达亿吨级大型基底裂缝油藏。Kohlan组砂岩和前寒武基底变质岩裂缝为储集层和休库拉组灰、泥质层为盖层,是盆地内的主要成藏组合,基底裂缝成藏成为非常重要的油气藏类型。从也门勘探开发的实际资料分析入手,总结分析马里卜-夏布瓦盆地基底裂缝油藏特点。

Marib-Shabwah passive rift basin is formed during the Arabian plate breakup from Gondwana supercontinent by shearing stress.The main targets were Alif sand stone( lower source and upper reservoir),Lam( source and reservoir the same in Lam) and Qishn,Shuqra( upper source and lower reservoir) before 2004;The basement reservoirs were great breakthrough in Block 3 \4 \7 \10 \14 \43 \51 \S1 \S2,more than 1 200 m high hydrocarbon formation and one trillion bbl proved reserves were discovered in fractured basement reservoir.Basement and Kohlan reservoir,Shuqra shale with micritic mudstones seal is main hydrocarbon system.fractured basement is becoming more important reservoir.This paper summarized the Characteristic of fractured basement reservoir in MaribShabawa,Yemen with the exploration and production actual activity materials.