TY JOUR TI Algorithm for selecting systems horizontal wells and mathematical models for unconventional reservoirs KW Horizontal well KW tight gas KW unconventional oil KW reservoir characterization KW fractured reservoir KW reservoir simulation KW oil and gas reserve JO Russian Journal of Earth Sciences AU Yarakhanova, D.G. AU Hossain, M.E. PY 2020 IS 20 PB Geophysical Center of the Russian Academy of Sciences