Publications

Two gas producer wells operated by a major international oil company in Sumatra Onshore needed to be recompleted to replace tubing and/or install bigger production tubing to maximize production. With a high H2S and CO2 content, effective barriers for containment of well fluids and pressures throughout the rest of well’s lifecycle need to be maintained to ensure that the wells are safe for workers and communities, minimize risks of leaks and spills, protect groundwater and surface water, and have low probability of long-term failure. A combined tubular inspection program consisting of a direct measurement Multi Finger Caliper and Electromagnetic measurement using Pulse Eddy Current was deployed. This allows quantitative corrosion evaluation/casing thicknesses of each multiple casing layer in the well and surface quality of inner most casing. At the end of less than 2 days operation, information was obtained that allowed operator to determine the maximum allowable operating pressure of each casing annulus and best spot of inner most casing for packer setting placement. This significantly reduced the probability of long-term failure and potential for expensive future recompletions. Keywords: annular integrity, corrosion, casing thickness