An integral method for calculation of capillary pressure based on centrifuge data of tight sandstone

作     者：Wei Xu Hang Huang Shi-Zhen Ke Jin-Peng Li Hai-Feng Zhang Yu-Bo Hu Wei Xu;Hang Huang;Shi-Zhen Ke;Jin-Peng Li;Hai-Feng Zhang;Yu-Bo Hu

作者机构：Key Laboratory of Exploration Technology for Oil and Gas Resources of Ministry of EducationYangtze UniversityWuhanHubei 430100China State Key Laboratory of Petroleum Resources and ProspectingChina University of PetroleumBeijing 102249China School of GeosciencesChina University of PetroleumQingdaoShandong 266580China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2022年第19卷第1期

页      面：91-99页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：supported by the Foundation of State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing(No.PRP/open-1704) the Foundation of Education of Hu Bei Province,China(No.Q20171304) the Foundation of Key Laboratory of Exploration Technology for Oil and Gas Resources of Ministry of Education(No.K-2018-12) 

主　　题：Centrifuge method Capillary pressure Tight sandstone NMR Water saturation 

摘      要：The traditional Hassler-Brunner(HB)interpretation method of centrifuge capillary pressure is widely used in materials,soil,biotechnology,and especially in the petroleum ***,the assumptions of the traditional method cannot be simultaneously satisfied,the traditional method has been known to lead significant errors in some *** this paper,a new double integral method is proposed to evaluate the centrifuge capillary pressure of long tight sandstone *** the changes of capillary length and interface of wetting phase and non-wetting phase fluids are considered by the new integral method,thus the average pressure and saturation derived from the proposed double integral method is more sufficient in theoretic foundation and clearer on physical *** comparing with the measured capillary pressure of long tight sandstone core samples from porous plate,the capillary pressure calculated from traditional HB method is obviously smaller than the measured value,and the discrepancy increases with the decreasing core ***,the average capillary pressure obtained by the proposed double integral method is remarkably consistent with the measured *** findings of this study can help for better understanding of distribution of wetting phase fluid and average centrifuge capillary pressure in the core during centrifugal process.