论文部分内容阅读
基于对Ogaden盆地侏罗系成藏组合成藏要素的系统解剖,认为其具备较好的油气成藏条件,并预测侏罗系成藏组合可能发育低幅度背斜、断块、鲕粒灰岩、白云岩透镜体、生物礁及局部溶蚀带等多种圈闭类型。在盆地不同部位,圈闭类型有所不同,但将以岩性及岩性—构造圈闭为主。Uarandab组为盆地内最重要的生油源岩,其与Hamanlei组储层上源下储的格局决定了原油侧向运移将处于主导地位,区域性古隆起为最有利富油区。储集体发育与岩性配置特征决定了油气的纵向分布,Hamanlei组中段可获多套源岩供烃,既可形成油藏,又可形成气藏;而Hamanlei组上段主要靠Uarandab组供烃,将主要以临近层序顶面的油藏为主。Calub隆起一带属于区域性古隆起,储层物性条件好,断裂和褶皱发育,被多套源岩生烃区围绕,油气成藏条件配置最佳,是目前最现实的勘探主攻区。
Based on the systematic anatomy of the Jurassic reservoir-forming assemblage in the Ogaden basin, it is considered that it possesses better hydrocarbon accumulation conditions and predicts that the Jurassic reservoir assemblage may develop low amplitude anticline, fault block and oolitic limestone , Dolomite lenses, reefs and local erosion zone and other trap types. In different parts of the basin, the trap types are different, but the lithology and lithology - structural traps will dominate. The Uarandab Formation is the most important source rock in the basin, and the pattern of upper and lower reservoirs in the Hamanlei Formation determines that the lateral migration of crude oil will dominate. The regional paleouplift is the most favorable oil-rich region. The reservoir development and lithologic configuration determine the longitudinal distribution of oil and gas. Multiple sets of source rocks can be provided for hydrocarbon generation in the middle Hamanlei formation, which can form reservoirs and gas pools. The upper Hamanlei Formation mainly relies on the Uarandab Formation for hydrocarbons, Mainly to the top of the reservoir near the sequence. The Calub uplift belonged to the regional paleohigh. The reservoirs have good physical properties, well developed fractures and folds, and are surrounded by multiple sets of source rock hydrocarbon generation zones. They are the most effective areas for oil and gas accumulation.