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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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Study on Theoretical Minimum Perforation Negative Pressure Design Method and Its Application

Author of the article:Tang Guoqiang, Xiong Youming, Xu Rui

Author's Workplace：Petroleum Engineering College of Southwest Petroleum University

Key Words：Negative pressure; Perforation; FVM; Discrete phase model; Flow field; Cleaning mechanism; Penetration model

Abstract：Applicable range of traditional minimum perforation negative pressure design method based on operation experience or experimental data is limited. In order to solve this problem, analyzed is the mechanism of negative pressure backflow cleaning, applied is the penetration model to calculate the flow rate, adopted are the finite volume method and discrete phase model to solve the moving track of flow field and rock debris inside the perforation tunnel according to the penetration flow rate and determined is the minimum perforation negative pressure design method. Applied is the new method to conduct negative pressure perforation in five wells and all of perforation tunnels spurt voluntarily after perforation, perforation tunnels are cleaned effectively and productivity is improved obviously. Field test results show that the minimum perforation negative pressure design method can effectively solve the problem that the traditional one based on operation experience or experimental data is limited.