Abstract
Tight oil reservoirs in the Songliao Basin have characteristics such as poor permeability parameters and undeveloped natural fractures. Reducing the fractural spacing and subdivision cutting the reservoir is to explore the trend and direction of enhancing SRV and recovery. This paper analyzes the induced stress field during the fracture propagation process of horizontal well tight cutting, and then uses XFEM numerical simulation method to study the optimization of fracture spacing. The results show that with the increase of the distance from the fracture, the induced stress difference caused by the pre-fracture in the horizontal well increases first and then decreases. In the effective range where the induced stress difference is greater than 0, turning or even reversal occurs when a new fracture is propagated. Define the corresponding position when the induced stress difference equals the initial geostress field difference as the minimum cluster spacing ΔLmin. During the fracturing construction, arranging fractures larger than ΔLmin can ensure that the cluster spacing is as small as possible and also allow the fractures to expand normally. As a result, multiple parallel effective main fractures are formed to achieve dense cutting of tight oil reservoirs, thereby increasing the SRV. This conclusion can be used as reference for the optimization design of subdivision cutting and fracturing spacing in Daqing Oilfield and other tight oil reservoirs in the future.
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References
Sun, L., Zou, C., Jia, A., et al.: Development characteristics and orientation of tight oil and gas in China. Petrol. Explor. Dev. 46(6), 1015–1026 (2019)
Zou, C., Zhu, R., Bai, B., et al.: Significance, geologic characteristics, resource potential and future challenges of tight oil and shale oil. Bull. Mineral. Petrol. Geochem. 34(1), 3–17 (2015)
Jia, C., Zou, C., Li, J., Li, D., Zheng, M.: Assessment criteria, main types, basic features and resource prospects of the tight oil in China. Acta Petrolei Sinica 33(3), 343–350 (2012)
Cui, M., Liu, Y., Xiu, N., et al.: Analysis of factors affecting the formation of Effective Stimulated Reservoir Volume (ESRV). Oil Drill. Prod. Technol. 36(02), 82–87 (2014)
Zhang, S., Guo, T., Zhou, T., et al.: Fracture propagation mechanism experiment of hydraulic fracturing in natural shale. Acta Petrolei Sinica 35(03), 496–503+518 (2014)
Zhang, Y., Pan, L., Zhou, T., et al.: A study of hydraulic fracture propagation for shale fracturing. Sci. Technol. Eng. 15(5) (2015)
Jin, C., Yang, D., Zhang, Y., et al.: Optimization techniques for stimulation design of horizontal wells of Heterogeneous tight oil in northern Songliao Basin. China Petrol. Exp. 19(6), 40–46 (2014)
Lin, T., Kang, D., Jiang, L.: Geological characteristics and exploration potential of the tight oil in Fuyu oil reservoirs of North Songliao Basin. Petrol. Geol. Oilfield Develop. Daqing 38(05), 94–100 (2019)
Mu, L., Zhao, Z., Li, X., et al.: Fracturing technology of stimulated reservoir volume with subdivision cutting for shale oil horizontal wells in Ordos Basin. Oil Gas Geol. 40(3), 626–635 (2019)
Mayerhofer, M.J., Lolon, E., Warpinski, N.R., Cipolla, C.L., Walser, D.W., Rightmire, C.M.: What Is Stimulated Reservoir Volume? Society of Petroleum Engineers, 1 February 2010. https://doi.org/10.2118/119890-PA
Cipolla, C.L., Warpinski, N.R., Mayerhofer, M., Lolon, E.P., Vincent, M.: The Relationship Between Fracture Complexity, Reservoir Properties, and Fracture-Treatment Design. Society of Petroleum Engineers, 1 November 2010. https://doi.org/10.2118/115769-PA.
Xu, J., Li, J., Wu, Y., et al.: Exploration and practice of volume fracturing technology in horizontal well of Mahu tight conglomerate reservoirs. China Petrol. Exp. 24(2), 241–249 (2019)
Tang, R., Wen, Q., Su, J., et al.: Factors affecting productivity of stage fractured horizontal well. Petrol. Drilling Tech. 38(2), 80–83 (2010)
Gao, H., Cheng, L., Qu, Z.: Optimization of the fracture parameters of fractured horizontal wells. Jo. Xi’Shiyou Univ. 21(2), 29–32 (2006). Natural Science Edition
Bunger, A.P., Zhang, X., Jeffer, Y.R.G.: Parameters affecting the interaction among closely spaced hydraulic fractures. SPE 140426 (2011)
Green, A.E., Sneddon, I.N.: The distribution of stress in the neighbourhood of a flat elliptical crack in an elastic solid. Math. Proc. Camb. Philos. Soc. 46(1), 159–163 (1950)
Sneddon, I.N.: The distribution of stress in the neighbourhood of acrack in an elastic solid. Proc. R. Soc. Lond. Ser. A 187, 229–260 (1946)
Sneddon, I.N., Elliott, H.A.: The opening of a Griffith crack under internal pressure. Q. Appl. Math. 3, 262–267 (1946)
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The project is supported by Major Natural Science and Technology Projects (2017ZX05071007).
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Ren, Jw., Feng, Qh., Zhang, Xm., Xie, Zh. (2021). Fracturing Spacing Optimization Study of Tight Oil Horizontal Well Based on Induced Stress Field. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2020. IFEDC 2020. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0761-5_95
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DOI: https://doi.org/10.1007/978-981-16-0761-5_95
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