一般说来,构成一个有利的油气圈闭要有几个特征(本文只取四个),而每一个具体的局部圈闭对于这几个特征有几个隶属度:μ_1,μ_2,μ_3,…,μ_n。由于这些特征在油气圈闭中起的作用不同,即具有不同的权数:α_1,α_2,α_3,…,α_n。若事先规定一定阈值(即限度)M,当隶属度与对应项的权数相乘再相加满足时,则认为此圈闭为有利圈闭。根据阈值M的取值大小,可对局部圈闭进行分类,并作出评价。本文以东濮凹陷为例,叙述了方法的具体应用。 In general, there are several features that make up a favorable oil and gas trap (only four in this paper), and each specific trap has several membership degrees for these features: μ_1, μ_2, μ_3, ... , μ_n. Since these features play different roles in hydrocarbon traps, they have different weights: α_1, α_2, α_3, ..., α_n. If a certain threshold (ie limit) M is specified in advance, the trap is regarded as a favorable trap when the degree of membership is multiplied by the weight of the corresponding term and then added. According to the value of the threshold value M, the local traps can be classified and evaluated. In this paper, Dongpu depression as an example, described the specific application of the method.