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通过对岩心、薄片、测井及地质构造等资料的综合分析,着重对海拉尔盆地乌尔逊、贝尔断陷侏罗系大磨拐河组、伊敏组、南屯组中泥岩类盖层破裂作用类型及特征进行了论述,提出了六种盖层破坏模式,指出断裂作用是破坏研究区内泥岩盖层封阻性的主要因素。通过对断层的划分和破坏性评价,对该区泥岩盖层在区域上的封堵风险进行了分析,指出了下一步勘探的有利区。
Based on the comprehensive analysis of cores, thin slices, well logging and geological structure, the authors focus on the rupture of middle mudstone caprock in the Jurassic Damoguaihe Formation, Yimin Formation and Nantun Formation in Wuerxun and Belle Depression, Hailaer Basin The types and features of action are discussed. Six kinds of caprock failure modes are proposed. It is pointed out that the fracture function is the main factor to destroy the caprock of mudstone caprock in the study area. Based on the division and destructive evaluation of faults, the risk of blockage of mudstone caprock in this area is analyzed, and the favorable area for next exploration is pointed out.