Fisher判别技术在火成岩流体识别中的应用

火成岩岩性特殊,储层非均质性非常严重,孔隙结构复杂,裂缝和孔洞发育,属于典型的多重孔隙介质储层。准确识别火成岩的流体性质是火成岩测井解释的关键。采用常规的孔隙度—电阻率交会图识别火成岩流体效果不好。本文阐述了Fisher判别技术原理,并应用于克拉玛依油田西北缘二叠系的测井解释,识别流体的符合率达到83.7%,精度明显高于常规的交会图法,为火成岩储层评价、流体判别提供了有力的证据。

Application of Fisher discriminatory analysis technology to identification of volcanic fluid

The volcanic reservoir, characterized by complicated structure of porosity, especially lithology character, strong heterogeneity and fracture and vuggy development, belong to multi-pore media. Identification of volcanic fluid property accurately is the key for volcanic logging interpretation. The effect of conventional receptivity porosity cross plot chart is not very obvious. This paper elaborates the rule of Fisher discriminatory analysis technology and the method is a successfully application in the Permian of northwestern margin in Karamay oil field. The coincidence rate acquires 83.7% and the accuracy of identification is more than the conventional cross plot chart. The applications of this method provides the proof for volcanic reservoir evaluation and identification.