Before the discovery of Fula oilfield,previous studies consider that there developed source rock of semi-deep to deep lacustrine in Abu Gabra Formation,Fula depression,which were comprehensively evaluated to be good to very good source rocks but with lower thermal evolution degree,and the other main factors controlling the formation of oil pools were uncertainty,so Fula depression were considered lack of the oil and gas exploration potential.Based on detailed study of gravity data,seismic data and well data,analysis stratigraphic sequence,structure development and evolution,sedimentary facies combined with lithofacies,log-facies and seismic facies,this study reveals that the development of structure and deposition in Fula depression were controlled by shear-extensional regional tectonism.There developed a certain and effective hydrocarbon generation sag of the Abu Gabra Formation in Lower Cretaceous.Three favorable source-reservoir-seal assemblages and 4 reservoir-forming zones are identified.The rollover anticline-faulted nose zone in the middle structure belt,the faulted noses zones in west margin of south sub-depression,in the south faulted step belt and in east margin of the north sub-depression are evaluated prospect reservoir plays.Fula 1 rollover anticline and Fula 2 faulted nose are regarded as the best of prospect targets.These study results play an important role on oil and gas exploration and development in Fula depression.This research methods and exploration strategy can provide references for early petroleum exploration and basin analysis.
An introduction to the general geological condition of Yemen which indicates that Yemen possesses relatively rich oil and gas resources;oil industry in Yemen was late to begin but quick to develop.On the other hand,its exploration level of basins containing oil and gas is low but its exploration field is wide.The article suggests that in view of the opening oil policy to the outside world adopted by the Yemen Government,CNPC,SINOPEC and CNOOC should take an active attitude towards entering Yemen's oil exploration and developing markets.
穆格莱德盆地福拉凹陷是一个在中非走滑断裂带控制下发育而成的中、新生代内陆断陷湖盆。自早白垩世至第四纪发育了3个各具特点的沉积旋回，早白垩世沉积的AG组湖相富含有机质的泥岩、页岩分布广泛，评价为好—极好烃源岩；早白垩世后期至晚白垩世发育了多套储盖组合；该凹陷构造格局简明，自南而北表现出“东断西超”→“不对称地堑”→“西断东超”的变化特点，发育有5个二级构造带(南部断阶带、南部次凹、中部构造带、北部次凹及北部断阶带)；构造圈闭发育，以滚动背斜及断鼻为主，且成带分布，形成了4个主要的成藏模式；具有较大的油气资源背景及良好的勘探前景，预测3～5a内在福拉凹陷可探明石油地质储量1.1×108～1.7×108t，可建成年产原油300×104～500×104t的生产能力。
东濮凹陷兰聊断裂带的形成演化可分为两个时期5个阶段,即中生代、新生代时期和挤压、初裂、强裂、萎缩、余动阶段.兰聊断裂带油气圈闭类型多,根据油气地质特征、圈闭所处位置、遮挡条件和产状等,可分为鼻状构造和半背斜构造、上翘物性遮挡岩性圈闭、潜山圈闭、礁体圈闭、地层不整合圈闭、地层超覆圈闭、古河道岩性圈闭及推覆构造圈闭8种类型,而油源丰富、油气运移条件好、通道多及水下扇砂体和构造控制则是油气聚集的主要因素.
