《Natural Gas and Oil》

News

Source Journal for Chinese S&T Papers and Citation2014/9/27
Announcement for Academic Dishonorable Behaviors2014/5/23

more>>

Internet Workstation

Edition and Publication

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

Links

Your Position ：Home->Past Journals Catalog->2012 Vol.1

View Full-text

Application of Gas Seal Testing Technology for Oil Casing to Horizontal Well in Gas Storage

Author of the article:

Author's Workplace：

Key Words：Gas storage； Gas seal； Screw thread； Sensitivity detection； Leakage rate

Abstract：Underground gas storage has such functions as seasonal gas peak shaving and energy reserves， its well completion casing string bears the alternating pressure for a long time and sealing of the casing string directly affects service life of entire gas storage. In order to ensure the integrity of the well completion casing string， gas seal testing technology used for the string is introduced for the first time during gas storage construction in Changqing Oilfield. Described are equipment used in the new gas seal screw thread testing technology and its testing principles and applied is the testing technology to conduct test on 3SB oil casing in two horizontal injection and production wells of Changqing Oilfield. Test results show that it is difficult to avoid oil leakage of the casing in test pressure condition， leakage rate and make-up torque of the casing and its test pressure are not directly correlated and can not be used directly as judgment basis for gas seal string leakage. Gas seal screw thread testing technology has high sensitivity of up to 0.1ppm， can accurately detect leakage of the casing and ensure integrity of the string.