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Qingying Cheng

As seen in: MDPI, ACS Publications
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Articles

Experimental Investigation on the Rock-Breaking Efficiency of High-Pressure Jet Drill Rod Perforation in Sandstone Roof Click to copy article link Article link copied!

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By Haoze Li, Qingying Cheng, Peiheng Yan
| ACS Publications
4.1.6.1. Abrasive Carrying Capacity Abrasive carrying capacity was characterized by three gradient levels of sand valve opening angle (60°, 75°, and 90°), corresponding to low, medium, and high abrasive feed rates in practical engineering applications.
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Investigation of the Gas Pressure Field and Production Rate for Two Typical Proppants: Small-Sized Continuous and Large-Sized Discontinuous Proppants

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By Wei Gu, Qingying Cheng, Dalong Xu, Sumeng Yao
| MDPI
1. Introduction The development and utilization of natural gas (shale gas, coalbed methane, etc.) is of great significance to the sustainable development of the world [1]. Under the influence of in situ stress, the reservoir porosity and permeability are generally low [2,3]. At present, the low reservoir permeability is the main factor restricting the development efficiency of natural gas. Hydraulic fracturing is a key technology to improve reservoir permeability [4].
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Mechanism of Single Proppant Pressure Embedded in Coal Seam Fracture

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By Haoze Li, Bingxiang Huang, Qingying Cheng, Xinglong Zhao
| ACS Publications
The strength and rigidity of proppant and coal are quite different. Proppant is easily embedded in coal, resulting in the decrease of fracture aperture and conductivity. The mechanism of proppant embedded in the coal fracture surface needs further study. In this paper, through theoretical analysis and experimental research of single proppant embedded, the proppant embedded law is analyzed from macro and micro aspects.
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