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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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Research and Application of Horizontal Well Full Bore Segregated Fracturing Technology

Author of the article:Qu Jing, Liu Bin

Author's Workplace：SINOPEC Southwest Oil and Gas Company Engineering Technology Institute

Key Words：Horizontal well; Full bore; Segregated fracturing; Fracturing; Fracturing technology

Abstract：Conventional Y341 casing packer segregated fracturing method is applied in western Sichuan low permeability tight gas reservoir fracturing construction, it is found that fracturing fluid flowback is not smooth, which results in influence on flowback and fracturing effect. Through investigation and evaluation of full bore segregated fracturing technology, preference is given to the coiled tubing dragging and bottom sealing segregated fracturing technology and K344 packer segregated fracturing technology for field test. Introduced are principles, characteristics and field test of the two technologies and analyzed are field test results. Analysis results show that the two technologies can realize downhole full bore and assure fracturing fluid flowback and smooth natural gas output. However, sandblast perforation design of the coiled tubing dragging and bottom sealing segregated fracturing technology still needs to be further optimized and K344 packer segregated fracturing technology has better adaptability in western Sichuan gas fields.