Abstract
An approach to predict field performance for gas field consisting of lenticular sand has been developed. This paper describes actual distribution of lenticular sands in a gas field and gives an image of these type of fields first. Then, a stochastic model which fully represents a field is introduced. The model is essentially similar with the Monte-Carlo simulation but the concept is different. The procedure to generate the model is presented and discussed. Finally, applying completion and production schemes, production forecast is obtained. Since various production profiles are available for respective development plans, the most appropriate plan is to be selected.