电成像测井资料评价火山岩储层的方法及应用

松辽盆地南部火山岩储层岩性复杂,储层非均质性强,溶蚀孔洞及裂缝发育,储层类型多样,气水关系复杂。岩性岩相识别、储层有效性定量评价、流体性质判别是测井评价的难点。针对火山岩储层特征,充分利用微电阻率扫描资料信息,结合岩心、薄片等资料,刻画不同岩性、结构、构造的成像特征,通过成像模式图片分类集成及孔隙度谱原生、次生孔隙、裂缝处理成果,建立不同储集类型的有效性定量判别指标;探索视地层水电阻率谱判别火山岩气水层的方法。通过实际应用,电成像资料在火山岩储层勘探评价、开发部署中发挥了不可或缺的作用。

Method and Application of Electrical Imaging Log Data for Evaluation of Volcanic Reservoir

Volcanic rock reservoir lithology in southern Songliao basin is complex, the reservoir heterogeneity is strong with corrosion pores and fractures, various types of reservoir and complex gas-water relationship.Phase identification of lithology and lithofacies, effectiveness evaluation, reservoir fluid properties discrimination are key problems for log evaluation.In view of the volcanic rock reservoir characteristics, we use micro-resistivity scanning data with core data to depict different imaging features of lithology, structure.With tectonic imaging mode image classification and integration, spectrum of primary porosity, secondary porosity as well as fracture treatment results, we have established the quantitative discriminant index for the effectiveness of different reservoir types.The apparent formation water resistivity spectrum is used to discriminate volcanic gas layers.Through practical application, the electric imaging data play an indispensable role in volcanic reservoir exploration evaluation.