Pressure Transient Analysis in Finite Linear Reservoirs Using Derivative and Conventional Techniques: Field Examples

In this paper, the authors present a new type curve to be used in the pressure transient analysis of rectangular reservoirs penetrated by a well with skin. The type curve uses the pressure derivative behaviour to aid in behaviour recognition and match confidence and reduces all the wellbore pressure reductions caused by skin and ''pseudo-skin'' during linear flow to one unique case. Cartesian plot techniques complement the type curve match calculations and ensure reservoir parameter and dimension correctness. The new techniques are applied to two field cases; both a gas and an oil well. The paper concludes that the type curve and cartesian plot techniques can be used to methodically investigate all possible rectangular reservoir configurations and well positions.