Growth model for large branched three-dimensional hydraulic crack system in gas or oil shale.

  title={Growth model for large branched three-dimensional hydraulic crack system in gas or oil shale.},
  author={V. T. Chau and Zdenek P. Bazant and Yewang Su},
  journal={Philosophical transactions. Series A, Mathematical, physical, and engineering sciences},
  volume={374 2078}
Recent analysis of gas outflow histories at wellheads shows that the hydraulic crack spacing must be of the order of 0.1 m (rather than 1 m or 10 m). Consequently, the existing models, limited to one or several cracks, are unrealistic. The reality is 10(5)-10(6) almost vertical hydraulic cracks per fracking stage. Here, we study the growth of two intersecting near-orthogonal systems of parallel hydraulic cracks spaced at 0.1 m, preferably following pre-existing rock joints. One key idea is that… CONTINUE READING


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