关键词: 非线性, 分析, 断层, 封闭性

Abstract: Nonlinear mapping analysis is a mathematical method of "geometric diagram with descended dimensions",The geomatric diagram is transformed from the muitidirnensional spaceinto a lower dirnensional space by nonlinear transform,so as to directly perceive the relationship of the samples in the low dimensional space.Every factor effecting the sealitig ability of fault is regarded as one dirnensional coordinate in the multidimensional space,every fault is a point in the multidimensional space. If thesealing abilities are similar,the positions of the faults in the space are close one another.After nonlinear mapping analysis,on the conditions of keeping approximately the geometric relationship among the faults,the rnultidimensional space can be transformed into a plane. Thesimilar faults in sealing ability are close on the plane.The faults with sealing abilities known and unknown are simultaneously analysed according to the positions of the evaluated faults on the plane,the sealing abilities of the faultsmay be accurately evaluated.

Key words: nonlinear, analysis, faults, sealing ability