Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide

Tian Shouceng; Zhang Qilong; Li Gensheng; He Zhenguo; Liu Han; Liu Xinran

doi:10.11883/1001-1455(2016)02-0189-09

Volume 36 Issue 2

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Tian Shouceng, Zhang Qilong, Li Gensheng, He Zhenguo, Liu Han, Liu Xinran. Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide[J]. Explosion And Shock Waves, 2016, 36(2): 189-197. doi: 10.11883/1001-1455(2016)02-0189-09

Citation:

Tian Shouceng, Zhang Qilong, Li Gensheng, He Zhenguo, Liu Han, Liu Xinran. Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide[J]. Explosion And Shock Waves, 2016, 36(2): 189-197. doi: 10.11883/1001-1455(2016)02-0189-09

Citation:

Tian Shouceng, Zhang Qilong, Li Gensheng, He Zhenguo, Liu Han, Liu Xinran. Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide[J]. Explosion And Shock Waves, 2016, 36(2): 189-197. doi: 10.11883/1001-1455(2016)02-0189-09

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Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide

doi: 10.11883/1001-1455(2016)02-0189-09

1.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 100083, China
2.
Bohai Petroleum Research Institute, Tianjin Branch, China National Offshore Oil Corp Co.Ltd, Tianjin 300425, China

Received Date: 2014-09-19
Rev Recd Date: 2015-01-20
Publish Date: 2016-03-25

Abstract

Abstract

Integrating supercritical carbon dioxide jet, known for its capability of reducing the threshold pressure of the rock and protecting the reservoir, with the combined swirling and round jet, known for its capability of enhancing the efficiency of rock erosion owing to its features, we would have a new highly efficient jet technology that may be called as combined swirling and round jet with supercritical carbon dioxide. In order to investigate the law governing its rock erosion, we carried out an experiment aiming at comparing the rock erosion capacity of this method with that of the conventional water jet and studying the effects produced by the of five important factors (the impeller length, the central hole diameter of the impeller, the length of the mixing chamber, the standoff, and the jet pressure) on rock erosion by using the nozzle which has been designed and fabricated especially for this purpose. The result shows that the rock erosion efficiency of this jet method is 42.9% higher than that of the conventional water round jet; the swirling and round jet with supercritical carbon dioxide may lead to the occurrence of rock mass breakaway; with the increase of the impeller length, the length of the mixing chamber and the standoff, the erosion performance tends to slacken after an initial good efficiency; the increase of the central hore diameter of the impeller can result in both a greater erosion depth and a reduced erosion diameter; and erosion efficiency can be enhanced by increasing the jet pressure. The results from the present study can be serve as an experimental basis for further research.
- mechanics of explosion,
- rock erosion experiment,
- combined swirling and round jet,
- impact jet flow,
- supercritical carbon dioxide

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References(19)

References

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