Abstract

Formation damage is an undesirable operational and economic problem that causes a reduction in the productivity, skin damage, and decrease in well performance. Formation damage occurs during the various phases of oil and gas recovery from subsurface reservoirs including production, drilling, hydraulic fracturing, and work over operations. Formation damage assessment, control, and remediation are among the most important issues to be resolved for efficient exploitation of hydrocarbon reservoirs. Such damage is caused by various adverse processes, including chemical, physical, biological, and thermal interactions of the formation and fluids, deformation of formation under stress and fluid shear. This paper systematically presents an analytical model developed for predicting productivity of reservoir with incidence of scale deposition in the vicinity of horizontal and vertical wellbore. The objective of this study is comparison among the spreadsheet, Kappa Ecrin Saphir program, and Halliburton Wellford Pan System software in calculating the effect of scale deposition on the flow performance for several types of wells. The results of vertical, horizontal wells were close using Kappa Saphir and PanSystem, but far using the Excel program.

Key words:  Productivity, scale, skin, well, software.