基于孔隙网络模型的碳酸盐岩岩心跨尺度分析  

Cross-scale Analysis of Carbonate Rock Cores Based on Pore Network Model

作　　者：曹耐 李虹[2] 黄历铭 李旭 刘潇潇 吴亚红 邓彤[4] CAO Nai;LI Hong;HUANG Li-ming;LI Xu;LIU Xiao-xiao;WU Ya-hong;DENG Tong(Sinopec Research Institute of Petroleum Engineering, Beijing 102206, China;College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China;Puyang Petrochemical College, Puyang 457001, China;Huadong Branch of Sinopec Geophysical Corporation, Nanjing 210009, China)

机构地区：[1]中国石化石油工程技术研究院,北京102206 [2]中国石油大学(北京)石油工程学院,北京102249 [3]濮阳石油化工职业技术学院,濮阳457001 [4]中石化石油工程地球物理有限公司华东分公司,南京210009

出　　处：《科学技术与工程》2022年第14期5582-5587,共6页Science Technology and Engineering

基　　金：国家科技重大专项(2017ZX05049-003)。

摘　　要：现有微观孔隙结构研究手段多局限于在微尺度提供孔喉尺寸、孔喉比等孔隙结构参数,所得结果无法直接应用于岩心尺度及矿场尺度等宏观尺度的研究中,其研究结果与储层实际结合具有一定困难。为此,从多尺度评价角度出发,以碳酸盐岩岩心数据体为研究对象建立孔隙网络模型分析碳酸盐岩微观孔隙结构,在此基础上,根据分布函数及分形函数对其进行尺度升级,获得岩心尺度评价参数。结果表明:尺度升级后的岩心表现出明显低渗、致密特性,与孔隙网络模型分析结果相符。可见,对微观孔隙结构分析结果进行尺度升级具有一定可行性,并且升级结果对于宏观尺度的评价工作具有一定的理论意义。The existing research methods for micro pore structure are mostly confined in providing structural parameters including the sizes of pores and throats,and the pore throat ratio,etc.at micro scale.The results obtained by those methods cannot be directly applied to the research on macro scale such as core scale and field scale,and they are usually difficult to be combined with the actual reservoir situation.In light of this,a pore network model was established to analyze the microscopic pore structure of carbonate rock with carbonate core data as the research object from the perspective of multi-scale evaluation.On this basis,the scale of the core was upscaled for further evaluation based on the distribution function and fractal function,and the evaluation parameters at core scale were thereby obtained.The results show that the upscaled core exhibits obvious low permeability and density,which is consistent with the analysis results of pore network model.Therefore,it is feasible to upscale the micro pore structure analysis result,and the upscaled results have a certain theoretical significance for the evaluation at macro scale.

关 键 词：孔隙网络模型 尺度升级 致密碳酸盐岩 相对渗透率曲线 微观孔隙结构 

分 类 号：TE344[石油与天然气工程—油气田开发工程]