基于储层砂岩孔隙结构的地震岩石物理模型  

Seismic Rock Physics Model Based on Pore Structure of Reservoir Sandstone

作　　者：李红梅[1] 曲志鹏[1] 张云银[1] 王红[1] 邓继新[2] LI Hongmei;QU Zhipeng;ZHANG Yunyin;WANG Hong;Deng Jixin(Geophysical Exploration Research Institute,Shengli Oilfield Branch of Sinopec,Dongying 257022,China;Department of Geophyics and Exploration,College Geophysics,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国石油化工股份有限公司胜利油田分公司物探研究院,山东东营257022 [2]成都理工大学地球物理学院地球物理与勘查技术系,成都610059

出　　处：《华北地震科学》2024年第1期25-31,36,共8页North China Earthquake Sciences

基　　金：中国石油化工股份有限公司科研项目(P21061-2)。

摘　　要：在实验室内对新疆车排子地区春光油田沙湾组储层砂岩样品进行了系统地震岩石物理实验,在确定储层砂岩中不同孔隙类型组成条件下,基于非接触模型综合考虑储层砂岩孔隙度以及孔隙形状对于干燥岩石骨架弹性性质的影响,并利用实验结果对模型参数进行标定进而建立表征目标储层岩石骨架地震弹性性质的岩石物理模型,模型结果与实验结果吻合良好。依据实验及模型结果,利用喷射流作用模型替代传统Gassmann方程进行流体替换,同样能够较好地对超声频率实验结果进行解释。Systematical rock physics experiments were conducted on the sandstone samples of Shawan Formation in Chunguang Oilfield,Chepaizi area,Xinjiang.After determining the composition of different pore types in reservoir sandstone,the non-interaction approximation(NIA)model is used to analyze the effects of porosity and pore shape on the elastic properties of the dry frame of sandstone samples.The seismic rock physics model for the rock samples is established by using the non-interaction approximation,and the model results are in good agreement with the experimental results.Based on the experimental and model results,the squirting-fluid model is used to replace the traditional Gassmann equation for fluid substitution,which can also better explain the experimental results of ultrasonic frequency.

关 键 词：砂岩 孔隙结构 地震 岩石物理建模 非接触模型 喷射流模型 

分 类 号：P631[天文地球—地质矿产勘探]