PERFORMANCE OF A VERTICAL WELL COMPLETED NEAR A PAIR OF INTERSECTING SEALING FAULTS

ABSTRACT

Pressure transient analysis/testing has been extensively applied in detecting anomalies in form of faults in a reservoir system. The principles of superposition and the Prasad model has been analyzed in this work to describe the pressure distribution along the reservoir. When a vertical well is placed near a sealing fault inclined at different angles, the fault forms image wells corresponding to its angle to the object well. This therefore affect the performance of the well and dictates how long the well will produce, hence the well must be positioned strategically. The angle of inclination of the fault gives number of image wells depending on the angles. For superposition model, n = 360/� -1, gives the number of image wells that will be formed and also the shape of the polygon. Application of this model has shown that this model fails when one or more of the image wells falls in the real plane. The Prasad model gives n = 180/� the number of wells in the reservoir. In this paper, the prasad model in compared as against the superposition model, so as to mitigate the challenge of using the principle of superposition. Type curves are generated for both model and their results compared.