Volume 40 Issue 4
Jul.  2023
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SHI Mingxing, LI Qin, QIU Siyang, et al.Effect of natural fracture on reservoir temperature distribution during fracturing[J]. Drilling Fluid & Completion Fluid，2023, 40（4）：540-550 doi: 10.12358/j.issn.1001-5620.2023.04.018
Citation: SHI Mingxing, LI Qin, QIU Siyang, et al.Effect of natural fracture on reservoir temperature distribution during fracturing[J]. Drilling Fluid & Completion Fluid，2023, 40（4）：540-550 doi: 10.12358/j.issn.1001-5620.2023.04.018
shu

Effect of Natural Fracture on Reservoir Temperature Distribution during Fracturing

doi: 10.12358/j.issn.1001-5620.2023.04.018

  • School of Energy, Chengdu University of Technology, Chengdu， Sichuan 610059

  • Received Date: 2023-03-06
  • Accepted Date: 2023-05-06
  • Rev Recd Date: 2023-05-01
  • Publish Date: 2023-07-30
    Abstract
  • In hydraulic fracturing, the pre-fluid not only plays a role of fracture formation, but also plays an important role of cooling in high temperature reservoir, which affects the effect of hydraulic fracturing. In order to study the influence of natural fractures on the cooling process of precursors, the temperature field of hydraulic fracturing in fractured reservoirs was simulated based on the finite volume method, and the influence of natural fractures on the temperature field of fractures in the process of injection was analyzed. On this basis, the influence law of natural fractures parameters on the reservoir temperature distribution and the cooling efficiency of precursors was discussed. Simulation results show that: Other conditions being the same, the greater the density of natural fracture, the wider the fracture width, and the smaller the angle between the fracture and the artificial fracture, the greater the reduction in reservoir temperature during the transformation, the higher the efficiency of the pre-fluid cooling, and the less pre-fluid required to cool the reservoir to the same temperature, natural fracture density parameters on the influence of the temperature field, the largest natural fracture density of 0.66/m pre-fluid dosage is only 1/3 of 0.16/m. Therefore, for hydraulic fracturing of deep fractured reservoirs, it can be considered to optimize the amount and displacement of precursors from the perspective of cooling, so as to reduce the economic cost.

     

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