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本文采用模糊综合评判和勘探早期经济评价方法对川北地区的圈闭进行靶区优选。模糊综合评判是建立在模糊集合概念上的一种数学评价方法 ,它是在确定圈闭评价因素和等级标准的基础上 ,通过对因素集合U和评语集合V建立模糊影射关系实现对圈闭的评价。勘探早期经济评价方法则依据投入产出比原则 ,在预测圈闭油气资源量的基础上 ,对圈闭预期的油气销售收入和勘探成本进行估算。最后结合两种方法的计算结果 ,对川北地区 14个局部构造及其 39个圈闭进行排队和分级 ,并选出元沱、仪陇、北山场、双河场等 4个构造作为近期重点勘探目标。
In this paper, fuzzy comprehensive evaluation and exploration of the early economic evaluation method for the target area selection of traps in northern Sichuan. Fuzzy comprehensive evaluation is a kind of mathematical evaluation method which is based on the concept of fuzzy set. Based on the determination of trapping evaluation factor and grade standard, fuzzy comprehensive evaluation is made by establishing fuzzy mapping relationship between factor set U and comment set V, Evaluation. Based on the principle of input-output ratio, the method of early economic evaluation of exploration estimates the oil and gas sales revenue and exploration cost of the traps based on the prediction of traps of oil and gas resources. Finally, according to the calculation results of the two methods, 14 local tectonics and 39 traps in the northern Sichuan area are queued and graded, and four structures, Yuantuo, Yilong, Beishanchang and Shuanghechang, are selected as key exploration areas aims.