A novel integrated workflow for evaluation, optimization, and production predication in shale plays

Some of the improvements are as follows. A new iterative algorithm is introduced toward integrated evaluation, prediction, and optimization of production in shale plays; the production contribution from unstimulated parts of the matrix (outside SRV) is considered; a new multi-phase productivity index is proposed; a new mechanistic formulation is presented to describe Dynamic-Drainage-Volume (DDV) for both early transient-linear flow and late compound-linear flow regime; a new pressure-saturation relation is established through relating fluid properties to production history. Moreover, geomechanics effects are coupled into material-balance model by introducing the pressure-dependent rock and fluid properties. The optimization of fracture and well spacing is achieved in Niobrara shale oil.