岩石物理建模技术在玛湖西斜坡储集层预测中的应用  

Application of Petrophysical Modeling Technique in Favorable Reservoir Prediction in Western Slope of Mahu Sag,Junggar Basin

作　　者：于宝利[1] 赵小辉[1] 瞿建华[2] 曹小璐 邓勇[1] 王晓辉[1] 

机构地区：[1]中国石油集团东方地球物理勘探有限责任公司研究院,乌鲁木齐830016 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2016年第6期720-725,共6页Xinjiang Petroleum Geology

基　　金：中石油"新疆大庆"重大专项(2012E-34-11)

摘　　要：准噶尔盆地玛湖凹陷西斜坡下三叠统百口泉组为一套扇三角洲前缘砂砾岩沉积,常规的叠后波阻抗反演不能区分有效储集层和致密储集层,制约了井位部署和储量计算。通过已有测井资料弹性参数交会发现,纵横波速度比是区分致密储集层和有效储集层的有效弹性敏感参数。通过准确计算泥质含量、有效孔隙度及含水饱和度等参数,选择了合理的岩石物理模型,有效提高了横波速度估算精度,为研究区叠前弹性敏感参数反演提供了基础资料保障。在此基础上,优选纵横波速度比参数有效落实了有效储集层的分布,钻井成功率达到80%,为研究区井位部署及储量落实提供了依据。The Triassic Baikouquan formation in the western slope of Mahu sag, Junggar basin is a set of fan-delta front sandy conglomeratedeposits. Conventional post-stack wave impedance inversion can't be used to distinguish effective reservoir and tight reservoir, which con-strains well placement and reserves calculation. Analysis on the available elastic parameter crossplots obtained from logging data showsthat v_p/v_s ratio is an effective elastic sensitive parameter to classify tight reservoir and effective reservoir. Based on accurate calculation ofshale content, effective porosity, water saturation and other parameters, a reasonable petrophysical model is selected and the accuracy of S-wave velocity estimation is improved significantly, which could provide fundamental data for prestack inversion of elastic sensitive parame-ters in the study area. With the optimized parameters of v_p/v_s ratio, effective reservoirs can be identified and exploratory well success ratecan reach 80%, which provides basis for well placement and reserves confirmation in the study area.

关 键 词：准噶尔盆地 玛湖凹陷 百口泉组 岩石物理建模 横波速度预测 纵横波速度比 储集层预测 

分 类 号：P631.445[天文地球—地质矿产勘探]