Advances in the Application of Temporary Plugging Agents for Fracturing in Unconventional Reservoirs

doi:10.3969/j.issn.1006-6535.2021.05.001

Abstract

Abstract: It is difficult to achieve economic and efficient development of unconventional resources by conventional fracturing technologies which only make single symmetric fractures due to extremely low permeability, so it is necessary to forcibly expand the stimulated reservoir volume by fracturing and make the fracture network more developed to enhance the produce of a single well. Temporary plugging is an effective method to improve fracture complexity. In this paper, a summarization was conducted on the existing studies and application effects of temporary plugging balls, conventional temporary plugging agents, fiber temporary plugging agents and other new synthetic temporary plugging agents used in the fracturing stimulation of unconventional reservoirs such as shale at home and abroad. Moreover, applicable conditions, advantages and disadvantages of the temporary plugging agents were explained, and the future development of temporary plugging agents was also stated clearly. The study results provide a significant reference and guidance for the studies on temporary plugging agents for fracturing stimulation of unconventional reservoirs in the future.

Key words: temporary plugging agent, fracture, unconventional reservoir, fracturing, shale.

CLC Number:

TE357

Wang Jiwei, Kang Yuzhu, Zhang Dianwei, Feng Dongjun, Chen Gang, Tian Lingyu. Advances in the Application of Temporary Plugging Agents for Fracturing in Unconventional Reservoirs[J]. Special Oil & Gas Reservoirs, 2021, 28(5): 1-9.

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