成像测井在延长气田上古生界沉积特征分析中的应用

摘要

成像测井可以精细反映沉积微相类型、裂缝、孔隙类型特征.利用成像测井资料,针对延长气田上古生界沉积特征沉积体系及沉积相特征、成像测井资料与沉积微相的对应关系进行分析.研究认为延长气田上古生界地层发育水平层理、平行层理以及交错层理,具冲刷-充填层面构造特征,各种层理在成像测井图上都能得到很好地反映;延长气田发育障壁海岸与浅海陆棚、曲流河三角洲、辫状河三角洲等沉积体系类型,成像测井图像上可以识别出层理发育特征、岩石粒序变化、岩性变化等特征,与沉积相的发育特征有较好的对应关系.%Based on imaging logging data,Sedimentary microfacies types,crack and pore can be reflected.The depositional systems and sedimentary facies characteristics,imaging logging data and sedimentary microfacies correspondence of Upper Paleozoic strata in Yanchang gas field are analyzed from the materials of imaging logging.The result shows that horizontal bedding,parallel bedding and cross bedding are developed,and have the structural feature of erosion-filling level and imaging logging can reflect all kinds of bedding well,barrier coast,shallow continental shelf,meandering river delta and braided river delta depositional system of Yanchang gas field are developed.Bedding development characteristics,rock graded changes and lithology changes can be identificated the imaging logging,it has good correspondence with the characteristics of depositional facies.