A New Analytical Model to Predict Gas Rate Volume Measurement Through Well Head Chokes

Abstract

Abstract Historically, choke gas equations have been extensively used for gross estimation about gas volumes. These analytical models give a quick evaluation on gas volume but also face some serious limitations on specific topics like water presence, excessive gas velocity and pressure drop, limited differential pressure and high condensate to gas ratios. Many different efforts have being completed using several analytical models which can be applicable under certain conditions. This paper details a new predictive model for estimating the gas rate measurement through wellhead chokes and also covers all efforts for Saudi Aramco to get a single digit error on estimating gas rates for Ghawar gas condensate producers by implementing this new analytical model. Additionaly, the application of this new gas equation covers a wide range of operative conditions as well as gives great benefits since perspective of:Reducing gas allocation errorImproving gas estimation while comparing with regular test separatorIdentifying well optimization opportunitiesGetting cost saving while minimizing use of conventional well-testingValidating venturi meter calculationsImproving well performance and diagnosticKeeping surface equipment under optimum operative conditionsMinimizing erosion while providing optimum gas velocity calculations The main objective of this paper is sharing this equation with Gas Producing Engineering Worldwide community and covering methodology of implementation as well as sharing practical field application cases.