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为了研究断裂发育区泥岩盖层在油气成藏与分布中的作用,在断裂对泥岩盖层破坏程度研究的基础上,通过断裂对泥岩盖层的破坏程度与其上下油气分布关系,确定出了泥岩盖层封油气所需的最大破坏程度.通过比较断裂对泥岩盖层破坏程度与其封油气所需最大破坏程度的相对大小,建立了一套利用地震资料预测断裂发育区泥岩盖层封油气区的方法,并将其应用渤海湾盆地冀中凹陷留楚地区断裂破坏东一、二段泥岩盖层封油气区的预测中,结果表明:留楚地区断裂破坏东一、二段泥岩盖层封油气区主要分布在留楚地区东部、西部中部和北部地区.东一、二段泥岩盖层非封油气区则主要分布在北部留楚背斜核部、西南广大地区和西北局部地区,与目前留楚地区其下东二、三段和其上馆陶组已发现油气仅分布在非封闭区相吻合,表明利用地震资料预测断裂发育区泥岩盖层封油气区是可行的.
In order to study the role of mudstone caprock in hydrocarbon accumulation and distribution in the fault zone, based on the study on the damage degree of mudstone caprock by fracture, the relationship between the damage degree of mudstone caprock and the hydrocarbon distribution above and below the fracture was determined, The maximum extent of damage required to seal oil and gas in the caprock is established.Through the comparison of the relative magnitude of fault damage to the maximum damage degree of mudstone caprock, Method and applied it to the prediction of oil and gas zones in the mudstone caprock of the east part and the second member of the Ruichu area in the Jizhong Sag, Bohai Bay Basin. The results show that: The areas are mainly located in the eastern part of the Liuyu area, the central and northern parts of the western part of the country, and the non-seal oil-bearing areas of the mudstone caprocks in the eastern part of the first and second member are mainly distributed in the northern part of the left margin of the Chuchu, vast areas in the southwest and some areas in the northwest, The Lower Second and Third Member of the Lower East China Sea and its upper Guantao Formation have found that oil and gas are only distributed in the non-confined area, indicating that the use of seismic data to predict fracture development zone mudstone Oil seal layer region is feasible.