基于孔隙结构自动拾取含水饱和度模型参数的新方法  

Novel method of automatically picking up water saturation model parameters based on pore structure

作　　者：司兆伟[1] 徐风[1] 赵文君 彭洪立 刘堂晏[2] SI Zhaowei;XU Feng;ZHAO Wenjun;PENG Hongli;LIU Tangyan(Exploration and Development Research Institute,Jidong Oilfield Company,PetroChina,Tangshan,Hebei 063000,China;State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China)

机构地区：[1]中国石油冀东油田公司勘探开发研究院,河北唐山063004 [2]同济大学海洋地质国家重点实验室,上海200092

出　　处：《石油地球物理勘探》2023年第1期152-160,共9页Oil Geophysical Prospecting

基　　金：国家“863”计划项目“核磁共振测井评价岩石孔隙结构及流体识别方法研究”(2006Z214AA06);国家自然科学基金面上项目“基于导电结构的岩石导电机制与流体饱和度计算方法研究”(41476027);国家科技重大专项“南堡凹陷油气富集规律与增储领域”(2016ZX05006-006)联合资助。

摘　　要：对于强非均质性储层,计算其含水饱和度时往往需假设岩石电性参数为常数,这会影响其计算精度。文中基于核磁岩心实验数据、含油饱和后的水驱替岩石导电实验数据、实际核磁测井数据及球管模型优化反演数据,建立储层孔隙结构与岩石导电模型参数之间的适配关系。测井数据处理过程中,依据这种关系实现逐点自动拾取饱和度模型参数,达到提高复杂储层含水饱和度计算精度的效果。该方法应用于冀东南堡油田实测岩心数据和核磁测井数据的处理,有效提高了非均质性储层含水饱和度的计算精度。实际数据应用结果表明,基于孔隙结构的含水饱和度模型参数自动拾取算法稳定、可靠,且计算过程无需人工干预,具有很好的应用前景。For severely heterogeneous reservoirs,rock electric parameters are generally assumed to be constants when their water saturation is calculated.Based on the core data from nuclear magnetic resonance(NMR)experi-ments,data from water-displaced rock conductivity experiments after oil saturation,actual logging data by NMR,and optimized inversion data of sphere-cylinder models,this paper establishes the matching relationship between the pore structure of reservoirs and the parameters of rock conductivity models.According to the ma-tching relationship,the parameters of saturation models can be automatically picked up point by point during logging data processing,so as to improve the calculation accuracy of saturation for complex reservoirs.The method is applied to process measured core data and logging data by NMR from Nanpu Oilfield of Jidong,and the calculation accuracy of water saturation for heterogeneous reservoirs is effectively improved.The application results of actual data show that the algorithm for automatically picking up water saturation model parameters is stable and reliable,and manual intervention is not required in the calculation.In addition,the algorithm has a good application prospect for complex and heterogeneous reservoirs.

关 键 词：测井解释 核磁共振 含水饱和度 岩石导电性 模型参数 

分 类 号：P631[天文地球—地质矿产勘探]