碳酸盐岩储层孔喉结构和储层参数的分析与反演  

Analysis and Inversion of the Pore-Throat Structure Parameters and Reservoir Parameters of the Carbonate Reservoir

作　　者：杨敬红[1] 李雄炎[2,3] 秦瑞宝 刘春成 

机构地区：[1]中海油田服务股份有限公司物探事业部,天津300451 [2]中海油研究总院,北京100027 [3]中国石油大学博士后流动站,北京102249

出　　处：《地质科技情报》2013年第2期118-123,共6页Geological Science and Technology Information

基　　金：国家重大专项"海外大陆边缘盆地勘探开发实用新技术研究"(2011ZX05030)

摘　　要：针对强非均质性碳酸盐岩储层微观孔喉结构差异所导致的孔隙度相似、渗透率和饱和度存在较大差异这一现象,开展了孔喉结构的评价。基于孔隙度和渗透率,衍生出储层参数RQI和RQF;划分了压汞曲线的类型、分析了压汞曲线的形态,提取了异于砂岩的压汞参数(SHg/pc)max;同时引入胶结指数m值。以RQI和RQF为核心参数,建立各参数间的函数关系,以满足资料丰度较弱的情况下孔喉结构的评价需求。另外,基于(SHg/pc)max与RQI之间的相关性,在每个进汞压力测试点下,建立了SHg与RQI之间的函数关系,达到重构压汞曲线的目的。鉴于核磁T2几何平均值与RQI之间的相关性,可以利用T2几何平均值反演储层的渗透率。分析碳酸盐岩储层孔喉结构和储层参数之间的关系,为完成孔喉结构的评价和储层参数的反演奠定了一定的理论和实践基础。Because of the strong heterogeneity of carbonate reservoir,there are big differences in the permeability and saturation when the porosity is similar.The phenomenon is caused by the difference of micro pore-throat structure.As a result,the evaluation of micro pore-throat structure is needed.Based on the porosity and permeability,the reservoir parameters including RQI and RQF are derived.The types and shapes of mercury injection curves are analyzed.The parameter of mercury injection curve（SHg/pc）max,which is different from the parameter of the mercury injection curve of the sandstone rock,is extracted.Meanwhile,the cementation index m is introduced.The relationships between the parameters are studied on the basis of the physical meanings of parameters.Their function relationships are built based on the core parameters RQI,in order to meet the requirement of evaluation of pore-throat structure when the information abundance is limited.In addition,the function relationship of SHg and RQI is established at each test point of mercury injection pressure based on the correlation of SHg,RQI.It′s aimed to reconstruct the mercury injection curves.In view of the correlation of the geometric mean of NMR T2 and RQI,the T2 geometric mean can be applied to the inversion of the permeability.The relationships between the pore-throat parameters and reservoir parameters of the carbonate reservoir are studied.It lays a theoretical and practical foundation for the evaluation of pore-throat structure and the inversion of reservoir parameters.

关 键 词：碳酸盐岩 孔喉结构 储层参数 压汞曲线 参数分析 参数反演 T2几何平均值 

分 类 号：P618.13[天文地球—矿床学]