Evaluation of Oil Well Performance in Shale Reservoirs Within the Concept of Permeable Rock Factory

If some years back petroleum engineers barely accepted the existence of considerable hydrocarbon resources in shales, nowadays against the widely published results of pilot projects the fact of oil shales productivity is obvious. It is also obviously that the challenges of shale reservoirs development is significant oil production declines and low cumulative production (in case of vertical wells). The reasons are low reservoir permeability and pure pore space connectivity common to shale reservoirs entirely. At these circumstances, the advanced fractured technologies are used for the enhanced of oil production. Since advanced fracturing technology developed and tested at complex geological conditions the number of new problems in reservoir simulation and hydrocarbon production forecast have been arisen. In the article, the principle description of filtration model in shale reservoirs based on stimulated reservoir volume concept presented. Analysis of production features distinguishing shale production introduced.For the purpose of characterization the range of uncertainties, the critical properties of stimulated reservoir volume detected as well as its influence on well productivity and ultimate oil recovery is studied. In conclusion modelling examples for one of the shale reservoirs from West Siberia based on the above methodology are given.