Mitigation Procedures and Best Practices to Conduct Slickline Memory Mode Production Logging In High-Pressure High-Temperature Sour Gas Wells

Abstract

Abstract Objectives/Scope This paper summarizes mitigation practices to safely conduct slick line memory production logging (PLT) in high pressure sour gas wells. The paper addresses the enhancements that were made to overcome the lifting force on the tool due to high flow rates and prolonged exposure time. Methods, Procedures, Process Well intervention in a live well poses several safety and operational considerations. These considerations are more critical when operating at or near high-pressure, high-temperature (HPHT) conditions in sour gas reservoirs. Well intervention in these types of reservoirs is associated with specific risks and, consequently, require a modified tool string designed specifically to withstand such a demanding environment. The paper describes all the problems that can occur in performing such jobs, and their mitigation practices that will lead to a successful job. Results, Observations, Conclusions There are several conveyance methods to run PLT in gas wells, such as: slickline, wireline, and coil tubing. In this job, the wireline could not be utilized due to its material which is not compatible with sour gas. Coil tubing is generally run in horizontal wells, but for a vertical well, CT is not a cost-effective option. Hence, slickline in memory mode was chosen. The slickline material is of utmost importance, and must be verified to withstand sour environment. Moreover, the pressure control equipment (PCE), H2S partial pressure, job safety analysis (JSA), job schedule, and job time, are all important factors that were carefully analyzed to successfully perform this job. Novel/Additive Information This paper might be the first in the literature describing how to safely perform slick line memory mode PLT in high-pressure high temperature sour gas environment.