束鹿凹陷西斜坡油藏分布规律及成藏模式

Reservoir distribution regularity and accumulation patterns of western slope in Shulu sag

在明确束鹿凹陷构造背景和沉积体系展布的基础上,通过梳理西斜坡的油气成藏条件、油藏类型及分布规律,明确了不同类型油藏的成藏模式。结果表明:从南北向看,束鹿西斜坡油藏分布主要集中在北部南小陈构造带、中南部西曹固-台家庄构造带以及南部的雷家庄构造带,其中,西曹固-台家庄构造带邻近中部洼槽,油气供给充足,具有连片成藏的优势条件;从东西向看,油藏主要分布在西斜坡内带,西斜坡外带油藏规模较小。束鹿凹陷西斜坡带主要发育岩性油气藏、构造油气藏、地层油气藏以及复合油气藏等四种油气藏类型,斜坡带不同部位发育的油气藏类型及成藏模式不尽相同,斜坡内带主要发育构造油气藏,斜坡外带以地层油气藏为主;西斜坡南部主要以地层油气藏和岩性油气藏为主,中部以构造油气藏、岩性油气藏和构造-岩性复合油气藏为主,北部则以构造油气藏和古潜山油气藏为主。

On the basis of defining the structural background and the distribution of sedimentary system in Shulu sag,by combing the oil and gas accumulation conditions,reservoir types and distribution regularities of the western slope,the reservoir forming patterns of different types of reservoirs are determined.The results show that from the direction of North to South,the reservoir distribution of western slope in Shulu sag is mainly concentrated in Nanxiaochen structural belt in the north,the Xicaogu-Taijiazhuang structural belt in the central and southern parts and the Leijiazhuang structural belt in the south.Among them,the Xicaogu-Taijiazhuang structural belt is adjacent to the central sag,with sufficient oil and gas supply,and has the advantage of continuous accumulation.From the direction of East to West,the reservoir is mainly distributed in the inner zone of the western slope,while the outer zone of the western slope has a small scale.There are mainly four types of oil and gas reservoirs:lithologic,structural,stratigraphic and composite in the western slope zone of Shulu sag.The types and patterns of oil and gas reservoirs developed in different parts of the slope belt are different.Structural reservoirs are mainly developed in the inner zone of the slope,while stratigraphic reservoirs are mainly developed in the outer zone of the slope.As for the western slope,there are mainly stratigraphic and lithologic reservoirs in the south,structural reservoirs,lithologic reservoirs and structural lithologic composite reservoirs in the middle,structural reservoirs and buried hill reservoirs in the north.