Study of Pressure Behaviour of a Well near Two Intersecting Faults Muhammad Taufiq Fathaddin(1*), Fajar Trihutomo (1), Asri Nugrahanti(1), Wisup Bae(2)
Petroleum Engineering Depertment, Universitas Trisakti, Jakarta, Indonesia
Abstract
A pressure build up test was performed in a dry gas exploration well. According to geological data indicated that there are two intersecting faults near the well. The analysis result provided not only information of the reservoir characteristics such as average reservoir pressure, permeability, and formation damage, but also confirmation of the presence of those two intersecting faults. In this study, a reservoir simulator was used to model pressure build up test of a well located near two intersecting faults. The effect of several parameters namely the distance between well to the faults, flow rate, and reservoir pressure, on bottom hole pressure behaviour was observed. The simulation results showed that the effect of variation of the distance between well and faults as well as that of reservoir pressure on estimation of permeability and skin factor is not significant. While, the variation of flow rate may result in a significant deviation. If a constant flow rate cannot be maintained during flowing period of the pressure build up test.
Keywords: well test, early time, middle time, late time, radial flow, linear flow
