Prediction of Skin Factor Reduction and Production Enhancement of Gas Well in The Field based on CoreNovel Stimulation Chemical Compatibility Test in Laboratory

Abstract

The article is focused on studying the condition of the physical properties of the reservoir rock before and after being injected with HPWBM (High Performance Water-Based Mud) and stimulated by Novel Chemical refers to the core compatibility test in the laboratory. Hereafter, calculations are carried out to predict the estimated skin factor reduction and production enhancement of gas well in the field based on the laboratory results. The next step is testing liquid permeability using KCL, this test is carried out before and after HPWBM injection and novel chemical injection. Therefore, the physical properties of the core were obtained before and after HPWBM and novel chemical treatment. Based on the core permeability value, the skin factor calculation was performed after HPWBM invasion and after injection of novel chemical with Tarek Ahmed (2001) equation, then nodal analysis was calculated to predict the increase in gas well production rate after treatment with novel chemical. The results of core permeability after being injected with HPWBM filtrate was decreased from 8.56 mD to 1.56 mD, which indicates that the invasion of the mud filtrate can cause damage in the borehole, then the core permeability after being injected with novel chemical shows an increase from 1.56 mD to 3.79 mD, this proves that novel chemical is able to reduce damage to rocks. Based on estimation of the skin calculations and well production rate results, it is shown that the novel chemical is predicted to be able to reduce gas well skins caused by HPWBM filtrate by reducing skin by 72% and able to produce with an estimated gas flow rate of 1.2 MMscfd.