| Citation: |
Hao-xian Shi, Yan-jiang Yu, Ru-lei Qin, Jun-yu Deng, Yi-xin Zhong, Li-qiang 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, 2023. Passability test and simulation of sand control string with natural gas hydrates completion in large curvature hole, China Geology, 6, 27-36. doi: 10.31035/cg2022024
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Passability test and simulation of sand control string with natural gas hydrates completion in large curvature hole
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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.
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References
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Hao-xian Shi, Yan-jiang Yu, Ru-lei Qin, Jun-yu Deng, Yi-xin Zhong, Li-qiang 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, 2023. Passability test and simulation of sand control string with natural gas hydrates completion in large curvature hole, China Geology, 6, 27-36. doi: 10.31035/cg2022024
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Figure 1.
Force analysis of sand control string lifting.
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Figure 2.
Borehole trajectory diagram of test well.
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Figure 3.
Schematic diagram of sand control string structure.
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Figure 4.
Screen liner before being run into well and screen liner being run into well.
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Figure 5.
Scratches on screen liner after it comes out of the well. a‒screen liner taken out immediately after entry; b‒screen liner taken out one year after entry.
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Figure 6.
Sand control string friction and test borehole data.
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Figure 7.
Fitting of simulated friction and actual friction of 9-5/8 "casing section of sand control string.
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Figure 8.
Calculation results of effective axial stress during tripping of the sand control string.
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Figure 9.
Calculation results of effective pulling force during tripping of the sand control string.
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Figure 10.
Calculation results of friction during tripping of the sand control string.
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Figure 11.
Change of hook load of sand control string with depth when the friction coefficient being 0.25.
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Figure 12.
Friction curve of sand control string running with a friction coefficient of 0.25.
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Figure 13.
Change of hook load of sand control string with depth when the friction coefficient being 0.4.
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Figure 14.
Friction curve of sand control string with a friction coefficient of 0.4.