Concise extraction and characterization of the pore-throat network in unconventional hydrocarbon reservoirs: A new perspective  

作　　者：Shu-Heng Du Yong-Min Shi 

机构地区：[1]State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing,100190,China [2]School of Engineering Science,University of Chinese Academy of Sciences,Beijing,100049,China [3]School of Earth and Space Sciences,Peking University,Beijing,100871,China

出　　处：《Petroleum Science》2024年第3期1474-1487,共14页石油科学（英文版）

基　　金：jointly supported by Beijing Natural Science Foundation(No.8232054);Young Elite Scientists Sponsorship Program by CAST(No.YESS20220094);Young Elite Scientists Sponsorship Program by BAST(No.BYESS2023182);Youth Innovation Promotion Association CAS(No.2023021);National Natural Science Foundation of China(No.41902132)。

摘　　要：In this study,a new image-based method for the extraction and characterization of pore-throat network for unconventional hydrocarbon storage and exploitation is proposed.“Pore-throat solidity”,which is analogous to particle solidity,and a new method for automatic identification of pores and throats in tight sandstone oil reservoirs are introduced.Additionally,the“pore-throat combination”and“pure pore”are defined and distinguished by drawing the cumulative probability curve of the pore-throat solidity and by selecting an appropriate cutoff point.When the discrete grid set is recognized as a pore-throat combination,Legendre ellipse fitting and minimum Feret diameter are used.When the pore and throat grid sets are identified as pure pores,the pore diameter can be directly calculated.Using the new method,the analytical results for the physical parameters and pore radius agree well with most prior studies.The results comparing the maximum ball and the new model could also prove the accuracy of the latter's in micro and nano scales.The new model provides a more practical theoretical basis and a new calculation method for the rapid and accurate evaluation of the complex processes of oil migration.

关 键 词：Hydrocarbon exploitation PORE THROAT Porous media Identification 

分 类 号：TE311[石油与天然气工程—油气田开发工程]