Predicting Sand Production in U.S. Gulf Coast Gas Wells Producing Free Water

Abstract

A study was undertaken to develop a statistical model capable of predicting the sanding of U.S. gulf coast gas wells that also produce free water. Available models predict sand production when only hydrocarbons are being produced, but none of the current models apply to gas wells when there is free-water production. Field data from gas wells and log-derived properties of reservoir rock were used to construct a usable model. This model, which differs from current models by using the previously developed dry model as an input in the statistically generated new wet model, has provided a practical tool that is based on failure criteria but validated by field data. The model presented here fits field data of water-producing gas wells better than the one currently available. When the optimum decision concerning gas production rate and the need for sand control can be made at the time of initial completion, more profit can be realized from the project. This model is intended to aid in the prevention of formation and equipment damage in gas wells.