IMPROVEMENT OF OIL PRODUCTION: CASE STUDY OF THREE WELLS IN NIGER DELTA

Abstract

Formation damage is a major problem experienced in the operation and development of petroleum reservoir. Its occurrence, occasioned with the release of particles, water, emulsions or scales, hitherto impairs the hydrocarbon delivery/transport system. Formation or skin damage impedes flow of fluids into the wellbore and cause low permeability, hence reducing the productivity of the wells. The production loss directly reflects the economic loss due to formation dama ge. In the extreme, damage may cause the Well to be uneconomic and be shut - in. The objectives of this project was to determine Stimulation C andidate for three (3) Wells in the Niger Delta Oilfield, using the R ratios, stimulate the candidate wells and make comparison between the wells with regard to the Pre - Stimulation and Post - Stimulation analysis. An analytical method was used to calculate Productivity Index, PI; Permeability, K; Skin, S; Production Rate, q, R - Ratio and Pressure Drawdown, ∆P using data fr om Pressure build up test in well testing analysis using Miller - Dyes - Hutchinson(MDH) method before and after acidizing treatment. From obtained results, the flowrate increased from 2000 STB/Day to 2230 STB/Day, productivity index also increased from 3.74 S TB/Day/psi to 9.78 STB/Day/psi for well 1, while for well 2, flowrate increased from 1132 STB/Day to 1170 STB/Day, productivity index also increased from 0.82 STB/Day/psi to 8.34 STB/Day/psi and well 3 flowrate increased from 1500 STB/Day to 1800 STB/Day, productivity index also increased from 4.12 STB/Day/psi to 6.91 STB/Day/psi