A New Method for Converting T_(2) Spectrum into Pore Radius

作     者：Fan Zhang Zhenxue Jiang Yuanhao Zhang Bin Hu Zaiquan Yang Yuhua Yang Xianglu Tang Hanmin Xiao Lin Zhu Yunhao Han Fan Zhang;Zhenxue Jiang;Yuanhao Zhang;Bin Hu;Zaiquan Yang;Yuhua Yang;Xianglu Tang;Hanmin Xiao;Lin Zhu;Yunhao Han

作者机构：CNOOC Energy Economics InstituteBeijing 100013China State Key Laboratory of Petroleum Resources and ProspectingChina University of PetroleumBeijing 102249China Unconventional Oil and Gas Science and Technology InstituteBeijing 102249China PetroChina Changqing Oilfield CompanyXi􀆳an 710018China E&D Research Institute of Oilfield Company Ltd.Daqing 163412China Research Institute of Petroleum Exploration and DevelopmentBeijing 100083China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2023年第34卷第4期

页      面：966-974页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 082002[工学-油气田开发工程] 

基　　金：supported by the CNPC basic advanced reserve technology (No.2018A-0908) 

主　　题：tight reservoir nuclear magnetic resonance(NMR) pore radius T_(2)spectrum. 

摘      要：In this paper,a new method for converting the T_(2)(relaxation time) of NMR(nuclear magnetic resonance) into the pore radius is *** with NMR and centrifugation experiments,the relationship between pore radius and T_(2) of the sample was *** results show that the new method is more reasonable than the traditional *** the sample was denser and the mercury saturation was lower,the pore distribution curve was obtained by traditional method had a worse agreement with mercury injection experiment,while pore distribution curve of the new method had a better agreement with the mercury injection curve,which reflected the greater advantage of the new method as the reservoir becomes *** new method can obtain all the pore information in the *** results show that the pores in tight sandstone are mainly consisted with mesopore and macropore,and the connectivity of macropore is better than that of *** new method can effectively characterize the full pore distribution and the seepage characteristics in different pores interval of tight reservoirs,which had a great significance to evaluate the recoverable resources of tight reservoir.