塔里木盆地YM32区块潜山白云岩油藏隔夹层三维地质建模

3D Geological Modeling of Interlayers in Buried-Hill Dolomite Reservoirs of Block YM32,Tarim Basin

针对塔里木盆地YM32区块潜山白云岩油藏储集层和隔夹层空间结构复杂,地层倾角大,同层井控程度低等特点,对单井隔夹层进行划分,计算地层真厚度来建立地层格架;采用白云岩岩相识别技术和地震属性多元统计回归法分析各种地震属性与不同岩性发育带的关系,利用岩石结构数和地震多属性约束,建立了白云岩体的岩相模型;叠加岩心实测孔渗数据、地震孔隙度反演属性,建立了研究区三维属性模型。后期的数值模拟对单井生产动态拟合符合率在93.6%以上,为研究区剩余油分布描述、新井井位部署和老井措施都提供了有效依据。

Regarding the characteristics such as complex spatial structure,large stratigraphic dip angle,low level of well control of buriedhill dolomite reservoir and its interlayers in the Block YM32of Tarim basin,the paper classifies the interlayers in individual wells and establishes the stratigraphic framework by calculating true formation thickness;analyzes the relationships between various seismic attributes and zones with different lithologies by using dolomite lithofacies identification technology and multiple regression mehtod,and establishes a lithofacies model for dolomite with rock texture number and multiple seismic attribute constraint;builds a3D attribute model for the study area through stacking actual measured core porosity and permeability,and inversion attributes of seismic porosity.The fitting ratio of numerical simulation results to the well production performance is more than93.6%,providing effective basis for remaining oil distribution description,new?well placement and existing?well stimulation in the study area.