Undersaturation (Dewatering)

Introduction

Dewatering must occur if the initial pressure is not on the isotherm. The figure below shows a sample idealized scenario(s). In this example, the coal is undersaturated and must be depressurized (dewatered) to critical desorption to initiate gas flow. Dewatering is often related to CSG Well Spacing & Completions .

See Also:

• Isotherm

References:

• Coalbed Methane in the Fruitland Formation, San Juan Basin, Western United States: A Giant Unconventional Gas Play, Article in AAPG Memoir · January 2001