孔洞型碳酸盐岩储层饱和度建模新方法及应用

发布时间：2018-09-01 08:40

【摘要】：碳酸岩复杂的孔隙结构和强烈的非均质性,导致传统的阿尔奇模型存在一定不适用性,主要体现在,m,n值的变化范围大。从岩石体积物理模型出发,设定n为常数,扩展m的含义并重新定义为孔隙结构指数,用它代替原Archie公式中胶结指数和饱和度指数对含水饱和度计算的影响。鉴于碳酸盐岩孔隙成因的复杂性和孔隙结构的复杂性,特别是裂缝型和溶蚀孔洞型碳酸盐岩储层取心困难,采用数值模拟手段考察碳酸盐岩孔隙结构指数m的影响因素及变化规律,主要包括孔隙结构特征参数孔喉比、孔隙度、泥质含量等因素对表征岩石导电性的F和岩石孔隙结构指数m的影响,又通过引入孔隙结构组分建立了变m的饱和度模型。应用效果表明新模型成功解决了四川磨溪溶蚀孔洞型碳酸岩储层水层段自由烃饱和度计算偏高的难题。
[Abstract]:The complex pore structure and strong heterogeneity of carbonatite lead to the inapplicability of the traditional Archie model, which is mainly reflected in the wide range of variation of the value of mechne. Based on the physical model of rock volume, n is set as a constant, the meaning of m is extended and redefined as pore structure index, which replaces the influence of cementation index and saturation index in the original Archie formula on the calculation of water saturation. In view of the complexity of pore genesis and pore structure of carbonate rocks, especially the difficulty of coring carbonate reservoirs with fractured and corroded pores, The influencing factors and variation rules of pore structure index m of carbonate rock were investigated by numerical simulation, including pore throat ratio and porosity. The influence of mud content on F and pore structure index m, which is used to characterize the electrical conductivity of rock, and the saturation model of varying m are established by introducing pore structure components. The application results show that the new model has successfully solved the problem of high free hydrocarbon saturation in the water reservoir of Moxi karst cavernous carbonate reservoir in Sichuan province.
【作者单位】：中国石油集团测井有限公司技术中心;中国石油天然气集团测井重点实验室;川庆钻探工程公司测井公司;
【基金】：中国石油集团公司重大科技专项(编号:2014E-3205) 国家“863”计划(编号:2013AA064602)联合资助
【分类号】：P618.13

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