多孔可变临界孔隙度模型及储层孔隙结构表征  

Multiple-porosity variable critical porosity model and pore structure characterization

作　　者：张佳佳 曾庆才[3] 印兴耀[1,2] 李红兵[3] 姜仁 黄家强 张连群[3] 张广智[1,2] 谷一鹏[1,2] ZHANG JiaJia;ZENG QingCai;YIN XingYao;LI HongBing;JIANG Ren;HUANG JiaQiang;ZHANG LianQun;ZHANG GuangZhi;GU YiPeng(School of Geosciences,China University of Petroleum(East China),Qingdao Shandong 266580,China;Key Laboratory of Deep Oil and Gas Geology and Exploration,Ministry of Education,Qingdao Shandong 266580,China;Petrochina Company Limited,Research Institute of Petroleum Exploration and Development,Beijing 100083,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]深层油气地质与勘探教育部重点实验室,山东青岛266580 [3]中国石油勘探开发研究院,北京100083

出　　处：《地球物理学报》2021年第2期724-734,共11页Chinese Journal of Geophysics

基　　金：国家油气重大专项(2016ZX05047-002);国家自然科学基金(41874146,41674130);中央高校基础研究业务费专项基金(18CX02061A);中国石油科技创新基金(2016D-5007-0301)等资助.

摘　　要：碳酸盐岩、致密砂岩和页岩等储层具有孔隙类型多样、孔隙结构复杂和非均质性强等特征,属于典型的多重孔隙储层,孔隙结构表征是多重孔隙储层预测和流体识别的关键.现有的孔隙结构表征方法大多利用孔隙纵横比或者构建一种新参数来描述孔隙结构.岩石临界孔隙度模型是一种常用的岩石物理模型,具有一定的物理意义和地质含义.本文推导了岩石临界孔隙度与岩石孔隙结构(孔隙纵横比)之间的关系,进而利用极化(形状)因子建立临界孔隙度与弹性参数之间的关系,构建了能够包含多种孔隙类型的多孔可变临界孔隙度模型.利用多孔可变临界孔隙度模型由储层的弹性参数反演不同孔隙类型的体积含量.实验室测量数据和实际测井数据表明,多孔可变临界孔隙度模型能够适用于多重孔隙储层岩石物理建模和孔隙结构表征.Carbonate,tight sandstone and shale reservoirs are characterized by variety of pore types,complicated pore structures and strong heterogeneity,which belong to the multiple-porosity reservoirs.Their pore structure characterization is the key to reservoir prediction and fluid identification.The existing pore structure characterization methods mostly use the pore aspect ratio or construct a new parameter to describe the pore structure.The critical porosity model is a commonly used rock physics model,which has certain physical and geological meanings.This paper derives the relationship between the critical porosity of rocks and the pore structure(i.e.the pore aspect ratio)of rocks,uses the polarization(shape)factor to establish the relationship between critical porosity and elastic parameters,and proposes a new model named the multiple-porosity variable critical porosity model.Based on this novel model,the volume content of different pore types can be inverted by elastic properties.Tests on experimental data and well logging data show this multiple-porosity variable critical porosity model can be used for modeling complex reservoirs and characterizing pore structures.

关 键 词：多孔可变临界孔隙度模型 孔隙结构表征 孔隙类型 孔隙结构 

分 类 号：P631[天文地球—地质矿产勘探]