Ultrafast Core Analysis for Tight Gas Reservoirs

Abstract

For oil and gas companies, accelerating the time to first hydrocarbon is a strategic objective. Special core analysis programs for tight gas reservoirs may take many months because of the long equilibration times involved in the tests. This represents a bottleneck for achieving the goal of reducing the time-to- market. Both log interpretation and reservoir modelling activities are impacted by the long SCAL durations. In order to face the challenge, a suite of fast methods have been developed. They are fast because they operate under non-equilibrium conditions. The methods give the m&n parameters for electric log interpretation, the endpoint gas relative permeability and the relationship linking initial gas saturation, trapped gas saturation and endpoint water relative permeability in a couple of days.