Case Study in Water Shutoff Fluid Placement Using Straddled Through-Tubing Inflatable-Packers Technique

摘要

Most of the wells in Sabriya Field (Northern Kuwait) produce from reservoirs, where multiple layers are opened to production. Problems related to non-desired water production are drastically affecting the oil production, and have been an ongoing concern. The exclusion of this water represents a challenging task by itself especially in case of multiple zones interval simultaneously producing, and where completion of the wells restricts considerably the convoyed down-hole tools configuration This paper covers water shut off case history of an oil producer that has shown according to the production data an increasing water production figures. The nature of water problem and the fact that the targeted section is located in-between multiple oil producer zones revealed the necessity of a complex thru tubing zonal isolation solution before performing the water shut-off treatment. Temporary coiled tubing conveyed straddle system was created using two thru tubing inflatable packers, isolating the top and bottom perforated zones in order to provide both proper zonal isolation and accurate treatment placement. The post water shut off treatment showed up to 70% water flow reduction from the targeted layer has been achieved.