评价储集层的模糊数学方法

EVALUATION OF THE RESERVOIRS BY FUZZY MATHEMATICS

胜利油田

1965年、美国学者查德(L.A.Zadeh)发表了一篇“模糊集会”的论文,提出了模糊集合的概念和解决模糊数学问题的方法。近年来,模糊集合理论有了很大的发展,引起了控制论、图象识别、计算机等学科的科学工作者的极大关注,他们试用该方法处理问题并取得了一些可喜的进展。本文分析了储集层油气评价工作中存在的模糊现象,运用模糊集合理论建立了评价因素对评价对象的隶属度;采用模糊综合评价方法,分析了各种算子的差异,确定了广义算子的数学模型;在储集层油气评价这样一个复杂的系统中,对油水层作出了有一定精度的评价。文章还讨论了不断补充新知识和修正错误的再学习方法,使模糊数学方法在认识和总结问题方面能吸收人脑对于复杂系统判别的特点,有利于提高电子计算机的灵活性,评价的正确性及客观性。

In 1965, an article titled "Fuzzy Sets" by L.A.Zadeh, an American scholar, was published. In this paper, the author put forward the notation of "fuzzy sets" and striked out the method of solving the problems of fuzzy mathematics. In recent years, the fuzzy sets theory has been developing rapidly and is followed with great interest by more and more scientists in different specific fields such as the cybernetics, the pattern recognition as well as the computer science. They have been trying to solve problems with fuzzy mathematics and some positive results have already been achieved.In this paper, the author firstly examined the fuzzy phenomenon appeared in the evaluation of the reservoirs and set up the relations of dependency between the evaluation factors and the evaluation objects by means of the fuzzy sets theory. By using the fuzzy comprehensive evaluation, the differences of various operators were analyzed and the ma-thematic models of the generalized operators were determined. With these as the fundamental work, the evaluation with some accuracy for oil and water formation has thus been made. In order to improve the flexibility of the computer and the correctness as well as the objective-ness of the evaluation, the ways of renewing one's knowledge and correcting the rerors were introduced.