Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular Leaks
Curing minor leaks and restoring the integrity of a wellbore in a safe and economical way is always challenging in oil and gas production. In this work, a composite pressure-activated sealant, combined with liquid and solid sealing materials, was prepared via the demulsification approach. The struct...
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MDPI AG
2020-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/21/5597 |
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| author | Lin Xu Xiaohe Huang Xin Huang Jie Xu Xijin Xing Mingbiao Xu Chao Ma Meilan Huang |
| author_facet | Lin Xu Xiaohe Huang Xin Huang Jie Xu Xijin Xing Mingbiao Xu Chao Ma Meilan Huang |
| author_sort | Lin Xu |
| collection | DOAJ |
| description | Curing minor leaks and restoring the integrity of a wellbore in a safe and economical way is always challenging in oil and gas production. In this work, a composite pressure-activated sealant, combined with liquid and solid sealing materials, was prepared via the demulsification approach. The structure, morphology, and size distribution of key particulates in the sealant were examined, and the in-situ self-adaptive sealing property was examined with a specially design dynamic sealing detector. The results indicated that the pressure-activated sealant was a multi-dispersed phase system, and the dispersed colloid particles were regular in shape and had a narrow size distribution of 300–400 μm. The solid sealing materials were introduced to construct a composite pressure-activated sealant, and the sealing capability can be markedly reinforced by cooperativity of liquid and solid sealing materials. A mechanochemical coupling model was put forward to rationalize the dynamic sealing process. Finally, such sealant system was employed in a certain offshore gas well with sustained casing pressure to verify its applicability in minor defect repairs. |
| first_indexed | 2024-03-10T15:20:06Z |
| format | Article |
| id | doaj.art-c868a5006d2249f5b032109cc6ae9826 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T15:20:06Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-c868a5006d2249f5b032109cc6ae98262023-11-20T18:36:34ZengMDPI AGEnergies1996-10732020-10-011321559710.3390/en13215597Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular LeaksLin Xu0Xiaohe Huang1Xin Huang2Jie Xu3Xijin Xing4Mingbiao Xu5Chao Ma6Meilan Huang7School of Petroleum Engineering & Environment, Zhejiang Ocean Univerisity, Zhoushan 316022, ChinaSchool of Petroleum Engineering & Environment, Zhejiang Ocean Univerisity, Zhoushan 316022, ChinaUnconventional Oil and Gas Science and Technology Research Institute, China University of Petroleum (Beijing), Beijing 102249, ChinaInstitute of Exploration Techniques, CAGS, Langfang 065000, ChinaBeijing Research Center of CNOOC (China) Co., Ltd., Beijing 100027, ChinaHubei Collaborative Innovation Center for Unconventional Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, ChinaHubei Collaborative Innovation Center for Unconventional Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, ChinaSchool of Chemistry and Chemical Engineering, Queen’s University Belfast, Belfast BT95AG, UKCuring minor leaks and restoring the integrity of a wellbore in a safe and economical way is always challenging in oil and gas production. In this work, a composite pressure-activated sealant, combined with liquid and solid sealing materials, was prepared via the demulsification approach. The structure, morphology, and size distribution of key particulates in the sealant were examined, and the in-situ self-adaptive sealing property was examined with a specially design dynamic sealing detector. The results indicated that the pressure-activated sealant was a multi-dispersed phase system, and the dispersed colloid particles were regular in shape and had a narrow size distribution of 300–400 μm. The solid sealing materials were introduced to construct a composite pressure-activated sealant, and the sealing capability can be markedly reinforced by cooperativity of liquid and solid sealing materials. A mechanochemical coupling model was put forward to rationalize the dynamic sealing process. Finally, such sealant system was employed in a certain offshore gas well with sustained casing pressure to verify its applicability in minor defect repairs.https://www.mdpi.com/1996-1073/13/21/5597composite pressure-activated sealantminor leak repairself-adaptive sealing propertyliquid-solid jamming transitioncooperative sealing effect |
| spellingShingle | Lin Xu Xiaohe Huang Xin Huang Jie Xu Xijin Xing Mingbiao Xu Chao Ma Meilan Huang Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular Leaks Energies composite pressure-activated sealant minor leak repair self-adaptive sealing property liquid-solid jamming transition cooperative sealing effect |
| title | Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular Leaks |
| title_full | Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular Leaks |
| title_fullStr | Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular Leaks |
| title_full_unstemmed | Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular Leaks |
| title_short | Systematic Experimental Investigation on In-Situ Self-Adaptive Sealing Property of Composite Pressure-Activated Sealant for Curing Minor Tubular Leaks |
| title_sort | systematic experimental investigation on in situ self adaptive sealing property of composite pressure activated sealant for curing minor tubular leaks |
| topic | composite pressure-activated sealant minor leak repair self-adaptive sealing property liquid-solid jamming transition cooperative sealing effect |
| url | https://www.mdpi.com/1996-1073/13/21/5597 |
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