Study Progress of Rock Fracturing Technology with High-voltage Pulse Discharge in Liquid

doi:10.3969/j.issn.1006-6535.2021.04.001

Abstract

Abstract: There are much more challenges in the exploration and development of tight sandstone and shale oil and gas reservoirs due to their tight lithology and extremely low porosity and permeability. For low-permeability oil and gas resources, rock fracturing technology with high-voltage pulse discharge in liquid is one of the important means to improve the effect of development. In this paper, the experimental device development, influencing factors and rock fracture law of the rock fracturing technology with high-voltage pulse discharge in liquid were analyzed and summarized, and the existing problems and development direction were determined. The results showed that the improvement of the conductivity of the liquid medium was helpful to increase the intensity of the pulse discharge shock wave; the higher the discharge voltage and the greater the discharge energy, the better the rock fracturing effect; the rock fracturing was mainly affected by tensile and shear stress, the fracture progress was symmetric, with turning, bifurcation and waveform characteristics. This paper provides a reference for the studies on rock fracturing technology with high-voltage pulse discharge in liquid, with great significance for the development of unconventional oil and gas reservoirs.

Key words: high-voltage pulse discharge in liquid, hydroelectric rock breaking, tight sandstone, shale, low porosity and low permeability

CLC Number:

TE21

Li Zhaoxuan, Yan Tie, Hou Zhaokai, Sun Wenfeng, Ju Guoshuai, Liu Shulong. Study Progress of Rock Fracturing Technology with High-voltage Pulse Discharge in Liquid[J]. Special Oil & Gas Reservoirs, 2021, 28(4): 1-9.

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