PRODUCTIVITY EQUATION FOR A HORIZONTAL WELL INSIDE A CLOSED-ANISOTROPIC BOX-SHAPED RESERVOIR UNDER PSEUDOSTEADY-STATE CONDITIONS

摘要: Beyond doubt, the productivity index is one of most important key parameters in reservoir evaluation and characterization. It a screening guide to establish size, presence on an aquifer connectivity degree. Thereby, its accurate determination challenge for engineers. This paper presents equation horizontal well pseudo-steady state closed anisotropic box-shaped reservoir, using uniform line sink model. A new calculating pseudo skin factor due partial penetration also proposed. Compared with equations wells literature, are more practical easy use field practice.