Passability test and simulation of sand control string with natural gas hydrates completion in large curvature hole

Abstract

To meet the requirements of marine natural gas hydrate exploitation, it is necessary to improve the penetration of completion sand control string in the large curvature borehole. In this study, large curvature test wells were selected to carry out the running test of sand control string with pre-packed screen. Meanwhile, the running simulation was performed by using the Landmark software. The results show that the sand control packer and screen can be run smoothly in the wellbore with a dogleg angle of more than 20°/30 m and keep the structure stable. Additionally, the comprehensive friction coefficient is 0.4, under which and the simulation shows that the sand control string for hydrate exploitation can be run smoothly. These findings have important guiding significance for running the completion sand control string in natural gas hydrate exploitation.

Keywords

Natural gas hydrates (NGHs) / Completion sand control string / Large curvature borehole / Passability test / Friction coefficient / Oil and gas exploration engineering / NGHs exploration trial engineering

CRediT authorship contribution statement

Hao-xian Shi, Yan-jiang Yu, Ru-lei Qin, Jun-yu Deng, Yixin Zhong conceived of the presented idea. Hao-xian Shi, Liqiang Qi, Bin Li, Bo Fan, Qiu-ping Lu, Jian Wang, Kui-wei Li, Ye-cheng Gan, Gen-long Chen, Hao-wen Chen, Zhi-ming Wu carried out the experiment. All authors discussed the results and contributed to the final manuscript.

Declaration of competing interest

The authors declare no conflicts of interest.

Acknowledgment

This work is supported jointly by one of the major projects of Basic and Applied Basic Research in Guangdong Province "Key Basic Theory Research for Natural Gas Hydrate Trial Production in Shenhu Pilot Test Area " (2020B0301030003); the project from Southern Marine Science & Engineering Guangdong Laboratory Guangzhou

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