LAPSE:2023.36345
Published Article
LAPSE:2023.36345
The Development and Evaluation of Novel Self-Degrading Loss-Circulation Material for Ultra-Deepwater Drilling in South China Sea
July 7, 2023
Focusing on the problem of drilling fluid loss circulation due to fractured granite formation in ultra-deepwater drilling in the research area, a novel self-degrading loss-circulation material is developed with polymer resin as the core material, according to the principles of loss-circulation prevention and reservoir and environmental protection. The relevant properties of the novel self-degrading loss-circulation material are evaluated by using tests or experiments. The pressure-bearing properties are evaluated by using a sealing capability test; the self-degrading properties are evaluated by using a self-degrading performance test; the pressure-bearing capability and reservoir protection properties are tested by measuring pressure sealing and gas permeability. The results of the tests and experiments show that the grinding rate of the loss-circulation material is less than 6% under 25 MPa, indicating that the novel loss-circulation material is of high compressive strength. The degradation process of the novel self-degrading loss-circulation material can be accelerated by increasing temperature and pH, and the degradation of the self-degradable polymer composite can be accomplished within 5 days under 95 °C and pH = 14. After self-degrading, the permeability recovery values of the highly permeable reservoir and the fractured reservoir are more than 96.9% and 99.15%, respectively, which indicates outstanding reservoir protection capability. Therefore, the novel self-degrading loss-circulation material has excellent temporary plugging and reservoir protection performance and can be used for plugging while drilling in ultra-deepwater drilling.
Record ID
Keywords
fractured granite formation, reservoir protection, self-degrading loss-circulation material, South China Sea, ultra-deepwater
Subject
Suggested Citation
Liu Z, Xu J, Peng W, Yu X, Chen J. The Development and Evaluation of Novel Self-Degrading Loss-Circulation Material for Ultra-Deepwater Drilling in South China Sea. (2023). LAPSE:2023.36345
Author Affiliations
Liu Z: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China; CNOOC China Limited, Zhanjiang Branch, Zhanjiang 524057, China
Xu J: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Peng W: CNOOC China Limited, Zhanjiang Branch, Zhanjiang 524057, China
Yu X: CNOOC China Limited, Hainan Branch, Haikou 570312, China
Chen J: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China [ORCID]
Xu J: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Peng W: CNOOC China Limited, Zhanjiang Branch, Zhanjiang 524057, China
Yu X: CNOOC China Limited, Hainan Branch, Haikou 570312, China
Chen J: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China [ORCID]
Journal Name
Processes
Volume
11
Issue
6
First Page
1802
Year
2023
Publication Date
2023-06-14
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr11061802, Publication Type: Journal Article
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Published Article
LAPSE:2023.36345
This Record
External Link
doi:10.3390/pr11061802
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Version History
[v1] (Original Submission)
Jul 7, 2023
Verified by curator on
Jul 7, 2023
This Version Number
v1
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https://psecommunity.org/LAPSE:2023.36345
Original Submitter
Calvin Tsay
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