徐东地区营城组一段火山岩储层综合定量评价

Comprehensive Quantitative Evaluation of Yingcheng 1 Volcanic Reservoirs in Xudong

针对火山岩储层非均质性较强,有效评价难度大等问题,以松辽盆地徐东地区白垩系营城组一段火山岩储层为例,运用SPSS聚类分析软件,利用10口井60块岩心分析测试资料、23口井206块压汞资料和32口井的精细测井解释成果,对储层进行了综合定量评价。结果表明,研究区目的层火山岩可以划分为Ⅰ、Ⅱ、Ⅲ和Ⅳ等4类储层,其中I类储层最少,储层以II类和III类(中等至差储层)为主,有利储层发育的部位主要位于研究区的中北部和西南部,层位主要为YC1I1小层和YC1II1小层,储层分类评价的结果为开发方案设计提供了重要的地质依据。

Strong heterogeneity of volcanic reservoir brings a great challenge to effective reservoir evaluation. SPSS cluster analysis software is used to comprehensively and quantitatively evaluate the Cretaceous Yingcheng1 volcanic reservoirs in Xudong of Songliao Basin. The involved information includes test data of 60 core samples from 10 wells,mercury injection data of 206 core samples from23 wells and fine logging interpretation of 32 wells. Result illustrates that the volcanic reservoirs in this region can be divided into 4classes,namely Class I,Class II,Class III and Class Ⅳ. Class II and Class III( middle to low- quality reservoirs) are the dominated reservoirs and the least one is Class I. Favorable reservoirs mainly distribute in the north- central and southwest and include Sublayer YC1I1 and Sublayer YC1II1. This reservoir classification and evaluation could provide an important geological basis to the development program design.