多层次模糊综合评价东营凹陷的含油气性

针对油气勘探中地质目标单元的含油气性难以进行定量的评价 ,形成有利油气目标单元的圈闭条件、油源条件、储集条件、保存条件和时空配套等主控因素受到众多的子因素影响等问题 ,提出采用多层次模糊综合评判的方法来进行含油气性的综合评价。通过对东营凹陷的北部陡坡、中央隆起、洼陷和南部缓坡等 4个二级含油气构造带的评价 ,认为北部陡坡带和中央隆起带为最有利的油气聚集带 (等级I) ,南部缓坡带中等 (等级II) ,而洼陷带较差 (等级III) ,评价结果与实际情况基本吻合。

Application of Multi-level Fuzzy Comprehensive Evaluation Method in the Hydrocarbon Potential Evaluation of Dongying Depression

In the process of oil & gas exploration, it is difficult to make a quantitative evaluation for hydrocarbon potential of a geological target, and there are too many factors having different influence such as trap, source, deposition, preservation, temporal and spatial matching, and lots of other smaller factors are included. Multi-level fuzzy comprehensive evaluation is successfully applied to solve this problem. The procedure of ranking 4 secondary tectonic units in Dongying Depression is given as an example. The outcome of computation indicates that the northern steep slope and the central uplift are the best for hydrocarbon accumulation, and that the southern gentle slope is the second and the subsag the worst, which tallies with the latest exploration findings in this area.