Hydraulic fracturing technology has become an effective technical method of developing tight oil reservoirs, such as an oilfield in Mahu, China. However, numerical simulation of the actual fracture seam network remains problematic. In this paper, we have simulated hydraulic fractures in the Urho Group of the Mahu target layer and analyzed the characterization of the rock mechanics parameters. The results show that Young’s modulus of the Wuerhe domain ranges between 18 and 58.5 GPa, with an average of 32.4 Gpa, the Poisson’s ratio is between 0.21 and 0.38, with an average of 0.31, the brittleness index is between 21.0 and 89.0, with an average of 44.3, and the hydraulic fracturing can form a multi-branch crack modification. The designed direction of horizontal wells in the area is north-south, and the horizontal stress difference is between 4.2 and 9.8 MPa, which facilitates easy fracturing of the reservoir and reforming of a complex seam network. Simulation of the artificial seam network helps to optimize the reasonable parameters of fracturing and the development parameters of horizontal wells in the Mahu 1 well area.
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Acknowledgments
This work was supported by “Tight oil development demonstration project in Junggar Basin,” the Major National Science and Technology project (Grant No. 2017ZX05070), Xinjiang Conglomerate Reservoir Laboratory Open Project (Grant No. 2019D04008), CNPC China University of Petroleum (Beijing) strategic cooperation project (Grant No. ZLZX2020-01), and Science and Technology Major Project of CNPC (No. 2017E-0405).
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 4, pp. 77–81, July–August, 2021.
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Huo, J., Kong, C., Jiang, Q. et al. Fracture Network Simulation and Mechanical Characteristics Analysis of Glutenite. Chem Technol Fuels Oils 57, 665–671 (2021). https://doi.org/10.1007/s10553-021-01291-2
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DOI: https://doi.org/10.1007/s10553-021-01291-2