利用灰色关联分析法进行圈闭综合评价

Comprehensive evaluation of traps by grey relevant analysis

在深入分析圈闭含油气性特征的基础上 ,采用灰色关联分析法给出了构造圈闭含油气性的综合评价方法 .此方法不仅可以综合评价圈闭的含油气性 ,而且还可以通过关联度给出评价结果的可靠程度 .运用该方法对松辽盆地北部深层 T3反射层构造圈闭进行了综合评价 ,结果表明 :含油气性好的和较好的圈闭主要分布在徐家围子断陷及相邻地区、莺山断陷及相邻地区、古龙断陷及绥化断陷 ;基本上好及较好的圈闭以生油凹陷为中心呈环绕状和沿控制断陷的边界断层成串珠状分布 ,尤其是徐家围子断陷和莺山断陷 ,是深层主要的生油中心 ,控制了深层油气分布 ;

Based on the analysis of the hydrocarbon bearing characters of the traps, an evaluation method of the hydrocarbon bearing properties of structural traps is presented. Using this method can not only evaluate the hydrocarbon bearing properties of the traps, can but also give the reliability of the evaluation by relevant degree. The deep structural trap T3 in the north of Songliao Basin is evaluated by this method, and it is shown that, the traps of the best and better hydrocarbon bearing properties distribute mainly in Xujiaweizi depression and its adjacent areas, Yingshan depression and its adjacent areas, Gulong depression and Suihua depression, and they are around deep hydrocarbon generating depressions. Especially Xujiaweizi and Yingshan depressions are main deep hydrocarbon generating centers, and they control deep oil and gas distribution. The hydrocarbon bearing properties of the traps in the north depressions and Changjiaweize depression are worse. The evaluation results in the paper are proven by the development practices of this area, which indicates the feasibility and reliability of the method.