松辽盆地东南隆起区营城组火山岩相和储层的空间展布特征

松辽盆地东南隆起区营城组火山岩岩相类型涵盖5种岩相中的12种亚相。物性统计分析结果表明,喷溢相上部亚相、侵出相内带亚相、火山通道相隐爆角砾岩亚相的储层物性较好。将物性结果结合平面岩性岩相图，确定出裂缝面孔率高的区域主要集中在火山机构中心附近的火山通道相火山颈亚相和隐爆角砾岩亚相、侵出相内带亚相、爆发相热碎屑流和热基浪亚相、喷溢相下部亚相；气孔面孔率高的区域集中在距离火山口较近的斜坡处，亚相主要为喷溢相上部、中部亚相。最后根据有利储层的定义和种类，得出有利储层主要位于古火山口及其附近的山脊处，面孔率值向外呈环带状减少或单向减少。

The Spatial Distribution of Volcanic Facies and Reservoir in Yingcheng Formation of Southeast Uplifted Area of Songliao Basin

The volcanic facies in study area include 12 subfacies in 5 volcanic facies.The porosity and permeabiltiy is better in upper sub-facies of effusive facies,inner subfacies of extrusive facies,cryptoexplosive breccias sub-facies of volcanic conduit facies.Based on statistical results and the volcanic lithology and facies map,high cracks surface pore concentrates at diatreme subfacies and cryptoexploisve sub-facies of volcanic conduit facies,inner subfacies of extrusive facies,pyroclastic flow subfacies and base surge subfacies of explosive facies,lower subfacies of effusive facies which are close to the volcanic edifices center.Holes surface pore focus on upper and middle subfacies of effusive facies which locates in the edifice slope.Finally,according to the definition and category,the favorable reservoir is located at craters and mountain ridge of paleovolcano and surface pore data are outward reduced in zonal shape or one-side reduction.