Assessment of Refracturing Potential of Low Permeability Reservoirs Based on Different Development Approaches

Jingchun Zhang, Ming Gao (), Jingfeng Dong, Tianxi Yu, Kebao Ding and Yan Liu ()
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Jingchun Zhang: Xinjiang Oilfield Engineering and Technology Research Institute (Supervision Company), Karamay 834000, China
Ming Gao: School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
Jingfeng Dong: Xinjiang Oilfield Engineering and Technology Research Institute (Supervision Company), Karamay 834000, China
Tianxi Yu: Xinjiang Oilfield Engineering and Technology Research Institute (Supervision Company), Karamay 834000, China
Kebao Ding: Xinjiang Oilfield Engineering and Technology Research Institute (Supervision Company), Karamay 834000, China
Yan Liu: School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China

Energies, 2024, vol. 17, issue 11, 1-14

Abstract: The technique of refracturing is an effective method to solve the rapid decline in oil well production caused by factors such as severe reservoir energy loss and fracture failure after the initial hydraulic fracturing of low-permeability reservoirs. The key to designing refracturing lies in establishing a model for evaluating the potential fracturing layers. Based on the geological characteristics of the low-permeability conglomerate reservoir in the Lower Wuerhe area of the Eig District of the Xinjiang Oilfield, this paper studies the influence of different development approaches on the distribution pattern of remaining oil in the reservoir. A coupled model of remaining oil distribution and the in situ stress field is established and discusses the characteristics of the four-dimensional in situ stress field under different development modes. This paper analyzes the influence of geological factors and well network factors on the distribution of residual oil, and analyzes the influence of various factors, such as reservoir properties and injection and extraction parameters, on ground stress. Based on the residual oil distribution and ground stress changes, an evaluation method for screening potential fractured layers in reservoirs with different development modes (water injection development and depletion development) is developed.

Keywords: low-permeability reservoir; refracturing; in-situ stress field; numerical simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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