油气藏综合评判中评价指标的定量化研究

QUANTITATIVE DEFINITION OF ASSESSMENT INDEXES IN A COMPREHENSIVE ASSESSMENT OF HYDROCARBON ACCUMULATION. PED

油气藏等级划分是油气资源勘探与评价的重要内容之一，所采用的模糊综合评判法的重要基础是其评语集。本文指出评语等级定量确定的意义，以川南矿区碳酸盐岩裂缝性气藏的含气性评价研究为例，采用模糊聚类和有序地质量的最优分割方法，确定出储层含气性不同等级对应各评价指标的定量取值界限。定量评价结果与实际情况相吻合，为油气赋存有利地带的定量化预测与评价提供了方法。

Classifical division of hydrocarbon resource is one of the final goal in petroleum exploration as well as an assessment of hydrocarbon resources, and definition of comment sets is an important foundation of fuzzy comprehensive assessment methods. Taking the assessment for the gas-bearing fractured carbonate gas reservoir rock oil fields in south Sichuan province as an example, the significance of quantitative definition of comment classification is indicated firstly, two methods, fuzzy cluster analysis and optimal segmentation analysis were taken. and the numerical limit of every index corresponding to every class of gas-bearing formation is quantitatively definited. As a result, a good method for quantitative prediction and assessment of hydrocarbon accumulation area is suggested in this paper.