Shale Initial Gas-in-Place Calculation
Abstract
This chapter introduces the most recent techniques in calculating the original gas in place (OGIP) of organic-rich shale reservoirs. The chapter introduces gas distribution in different pore structures of shale gas reservoirs and different techniques used for OGIP calculations. The effect of adsorbed gas volume and adsorbed layer thickness on OGIP calculations is then discussed. The chapter also outlines analytical and numerical techniques of adsorbed gas density measurements. Examples are presented that clearly show the steps required for OGIP calculations. Finally, the concept of recovery factor is discussed and sample practice is provided.
Keywords
Original gas in place; adsorbed phase ...
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