Design of glycol unit for maximum efficiency in Gachsaran oil field

Document Type

Conference publication

Publication details

Bahadori, A 2003, 'Design of glycol unit for maximum efficiency in Gachsaran oil field', SPE Latin American and Caribbean Petroleum Engineering Conference, Port-of-Spain, Trinidad and Tobago, 27-30 April. ISBN 9781555639662

Published version available from:


Peer Reviewed



In designing dehydration units for natural gas, several critical parameters exist which can be varied to achieve a specified dew point depression. This paper studies the effects of varying the glycol flow rate, number of stages in the contactor,. The presence of heavy ends (C7+). Water and hydrocarbons are natural companions. Hydrocarbons are formed in water environment and are in equilibrium with water. The water content of a gas depends on system pressure and temperature and the composition of the water containig gas. The presence of heavy ends (C7+) effects the water capacity of gas. In this study the effects of glycol circulation rate, glycol concentration and C7+ mol fraction are evaluated in a dehydration system. This paper presents optimization of dehydration units. The results provide an analysis of the dehydration effectiveness at a variety of common operating variables for a typical dehydration facility. Next, the effect of c7+ in the plant feed will be presented.