Gas Dehydration Field Manual

Abstract

Most natural gas contains substantial amounts of water vapor due to the presence of connate water in the reservoir rock. At reservoir pressure and temperature, gas is saturated with water vapor. Removal of this water is necessary for sales specifications or cryogenic gas processing. Primary concerns in surface facilities are determining the: Water content of the gas Conditions under which hydrates will form Liquid water can form hydrates, which are ice-like solids, that can plug flow or decrease throughput. Predicting the operating temperatures and pressures at which hydrate form and methods of hydrate prevention are discussed in this section.