A comprehensive overview on recent developments in refracturing technique for shale gas reservoirs

Shah, Maunish; Shah, Subhash; Sircar, Anirbid

doi:10.1016/j.jngse.2017.07.019

Cited by 58 publications

(20 citation statements)

References 3 publications

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“…Furthermore, "reinforcing fractures by using prop" appeared to be the most critical field of IP technologies since 2012. This result is consistent with the results of Shah et al [14] who also found that productivity improvement was achieved through reinforcing in the shale industry.…”

Section: Introductionsupporting

confidence: 93%

“…According to previous studies [8][9][10][11][12][13][14][15], production technologies of shale petroleum have grown since production began. Kim and Lee [8] argued that productivity grew by 1.9%, while cumulative production of shale gas doubled from 2008 to 2016.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, some factors, such as improvements in the decline curves and increase in the lateral length of the wellbore, indicate that the development of production technologies has affected productivity from 2013 to 2016. The optimization of the production of a well could be conducted after its completion by refracturing the reservoir [14]. West [15] reviewed the improvement in productivity and the issues in production technologies by analyzing the topics of technical papers on shale petroleum from 2018 to 2019.…”

Section: Introductionmentioning

confidence: 99%

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Patent Analysis on the Development of the Shale Petroleum Industry Based on a Network of Technological Indices

Kim

Lee

2020

Energies

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This study investigated the technological developments in the shale petroleum industry by analyzing patent data using a network of technological indices. The technological developments were promoted by the beginning of the shale industry, and after the first five years, it showed a more complex development pattern with the convergence of critical technologies. This paper described progress in the shale petroleum technologies as changes in relatedness networks of technological components. The relatedness represents degree of convergence between technological components, and betweenness centrality of network represents priority of technological components. In the results, the progress of the critical technologies such as directional drilling, increasing permeability, and smart systems, were actively carried out from 2012 to 2016. Especially, unconverged technology of increasing permeability and the converged technology of directional drilling and smart system has been intensively developed. Some technological components of the critical technologies are more significant in the form of converged technology.

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Section: Introductionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Patent Analysis on the Development of the Shale Petroleum Industry Based on a Network of Technological Indices

Kim

Lee

2020

Energies

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“…Refracturing can open new flow channels in oil and gas reservoirs and communicate with the unused reservoir of the old fracture to increase oil and gas production. The refracturing treatment design for shale gas wells is largely based on the original wellbore completion and reservoir characteristics, rock mechanics, geostress characteristics, and fracture geometry [10]. During the initial hydraulic fracturing, the fracture morphology formed is of great significance to the subsequent refracturing.…”

Section: Discussionmentioning

confidence: 99%

“…With the development of fracturing technology, some scholars have begun to pay attention to issues related to refracturing. The properties of refracturing and the conditions limiting the application of refracturing are discussed [10]. The identification method of candidate wells is introduced, and the treatment design, diagnosis technology, and economic evaluation are discussed.…”

Section: Introductionmentioning

confidence: 99%

Study on Fracture Morphological Characteristics of Refracturing for Longmaxi Shale Formation

et al. 2020

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Refracturing technology has become an important means for the regeneration of old wells reconstruction. It is of great significance to understand the formation mechanism of hydraulic fracturing fracture for the design of hydraulic fracturing. In order to accurately evaluate and improve fracturing volume after refracturing, it is necessary to understand the mechanism of refracturing fracture in shale formation. In this paper, a true triaxial refracturing test method was established. A series of large-scale true triaxial fracturing experiments were carried out to characterize the refracturing fracture initiation and propagation. The results show that for shale reservoirs with weak bedding planes and natural fractures, hydraulic fracturing can not only form the main fracturing fracture, which is perpendicular to horizontal minimum principal stress, but it can also open weak bedding plane or natural fractures. The characteristics of fracturing pump curve indicated that the evolution of fracturing fractures, including initiation and propagation and communication of multiple fractures. The violent fluctuation of fracturing pump pressure curve indicates that the sample has undergone multiple fracturing fractures. The result of refracturing shows that initial fracturing fracture channels can be effectively closed by temporary plugging. The refracturing breakdown pressure is generally slightly higher than that of initial fracturing. After temporary plugging, under the influence of stress induced by the initial fracturing fracture, the propagation path of the refracturing fracture is deviated. When the new fracturing fracture communicates with the initial fracturing fracture, the original fracturing fracture can continue to expand and extend, increasing the range of the fracturing modifications. The refracturing test results was shown that for shale reservoir with simple initial fracturing fractures, the complexity fracturing fracture can be increased by refracturing after temporary plugging initial fractures. The effect of refracturing is not obvious for the reservoir with complex initial fracturing fractures. This research results can provide a reliable basis for optimizing refracturing design in shale gas reservoir.

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In-Situ Stress Evolution and Refracturing Simulations of Horizontal Wells in Tight Conglomerate Reservoir

Luo

Zhao

Zhang

et al. 2022

Proceedings of the International Field Exploration and Development Conference 2021

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A comprehensive overview on recent developments in refracturing technique for shale gas reservoirs

Cited by 58 publications

References 3 publications

Patent Analysis on the Development of the Shale Petroleum Industry Based on a Network of Technological Indices

Patent Analysis on the Development of the Shale Petroleum Industry Based on a Network of Technological Indices

Study on Fracture Morphological Characteristics of Refracturing for Longmaxi Shale Formation

In-Situ Stress Evolution and Refracturing Simulations of Horizontal Wells in Tight Conglomerate Reservoir

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