Multi-fracture Propagation Law of Horizontal Wells under Stress Shadow Effect

Kangxing Dong, Suling Wang, Jinbo Li

Ekoloji, 2019, Issue 107, Pages: 789-796, Article No: e107093


Download Full Text (PDF)


In order to explore the law of multi-fracture propagation in cluster fracturing of horizontal wells, considering the stress shadows between fractures, a similarity numerical model for full three-dimensional fluid-solid coupling hydraulic fracturing was established, and the extended finite element method was used to solve the problem. The effects of rock mechanics properties, fracture interval and construction parameters on fracture propagation law were analyzed by the control variable method. The results show that with the increase of elastic modulus, the width of fractures on both sides and intermediate fractures decreases, while the length of multi-fractures increases. With the increase of displacement, the width of fractures on both sides increases first and then decreases, the width of intermediate fractures decreases first and then increases, the length of fractures on both sides increases gradually, and the length of intermediate fractures decreases slightly. With the increase of fracture interval, the width of fractures on both sides and in the intermediate increases little, but the length increases obviously. When the interval exceeds 30 m, the interaction between fractures is very small, and the fractures show a trend of parallel propagation. The research content of this paper has guiding significance for optimizing cluster interval in staged fracturing.


stress shadows, horizontal wells, multiple fractures, extended finite element method


  • Cai B, Tang BZ, Ding YH, et al. (2014) Influence of stress shadow on horizontal well fracturing. Natural Gas Industry, 34(7):55-59.
  • Chen YJ, Zhang MJ, Li W, et al. (2014) A comparative analysis of investment and benefit between conventional fracturing and fracturing by stimulated reservoir volume (SRV): Cases history of gas/shale gas wells in the Southern Sichuan Basin. Natural Gas Industry, 34(10):128-132.
  • Kong YX, Lu DT, Xu XZ, et al. (1996) Study on convection in porous media. Advances in Mechanics, 26(4):510-520.
  • Lin YM (1984) Simulation study of experimental rock mechanics. Coal Industry Publishing House:3-17.
  • Qu ZQ, Tian Y, Li JX, et al. (2017) Numerical simulation study on fracture extension and morphology of multi-cluster staged fracturing for horizontal wells. Journal of China University of Petroleum (Edition of Natural Science), 41(1):102-109.
  • Roussel N, Sharma M (2011) Strategies to Minimize Fracture Spacing and Stimulate Natural Fractures in Horizontal Completions.
  • Sneddon NI (1946) The distribution of stress in the neighborhood of a crack in an elastic solid. Proceedings of the Royal Society a Mathematical Physical and Engineering Sciences, 87(2):229–260.
  • Warpinski NR, Mayerhofer MJ, Vincent MC, et al. (2008) Stimulating unconventional reservoirs: maximizing network growth while optimizing fracture conductivity. SPE 114173.
  • Wu Qi, Xu Y, Wang TF, et al. (2011) The revolution reservoir stimulation: An introduction of volume fracturing. Natural Gas Industry, 31(4):7-12.
  • Xia L, Zeng YW, Jin L, et al. (2016) Research on influence of initial horizontal principal stress on stress shadow. Chinese Journal of Rock Mechanics and Engineering, 35(1):2819-2825.
  • Xu Y, Chen M, Wu Q, et al. (2016) Stress interference calculation model and its application in volume stimulation of horizontal wells. Petroleum Exploration and Development, 43(5):128-132.