层次分析法在低品位油田储量评价中的应用

APPLICATION OF THE ANALYTIC HIERARCHY PROCESS IN THE LOW-GRADE RESERVES EVALUATION

大庆外围油田探明储量规模较大,但剩余未开发储量的品质较差,具有特低渗透、特低丰度、特低流度及油水关系复杂等特点,传统的分类方法难以适应目前低品位储量分类需求.层次分析法是应用数学工具结合运筹思想将复杂的问题分解为各个组成因素,并按支配关系分组形成层次结构,通过综合各因素之间的相互影响关系及其在系统中的作用,来确定各因素相对重要性的一种决策思维方法.应用实例表明层次分析法可以解决传统低品质储量单参数分类的矛盾,适合大庆外围低品质储量评价,其结果有利于指导未开发储量优选及已开发区块开发调整.

Daqing peripheral oilfields are featured by large-size proved reserves, but the quality of the remained undeveloped reserves is rather poorer, in detail the reserves are characterized by ultra-low permeability, ultra-low abundance, ultra-low mobility and complex oil-water relations etc, and moreover the traditional classifing methods are difficult to meet the requirements of the current low-grade reserves classification. The analytic hierarchy process is one kind of decision-making methods with the help of mathematical tools integrated with operational thought and moreover the hierarchy structure is formed by the grouped dominating relations, and finally the relative importance of the factors is determined by means of the interaction of the each factors and their roles in the system. The history case proves that the method can solve the contradiction of single parameter classification for the traditional low-qual- ity reserves and adapt itself to the evaluation of the low-quality reserves in Daqing peripheral oil fields. In a word, the application results are beneficial to the optimization of the undeveloped reserves and adjustment of the developed blocks.