Planning is an important part of a successful coiled-tubing-conveyed horizontal well production logging job. Close coordination between a multidisciplinary team, including the operating company’s production engineer, reservoir engineer, field supervisor, and the logging and coiled-tubing company representatives is required. Without a proper balance of input from these individuals, conflicts can arise, costly downtime can occur, and data can be lost. To avoid these potential problems, prejob planning should be considered a necessary and cost-effective part of the coiled-tubing-conveyed horizontal well production logging job.

The multidisciplinary team should jointly address reservoir, operational, and production issues. Reservoir issues include reservoir performance, gas-, oil-, and water-contact identification, fault and fracture identification, variations in rock quality, and productivity. The production issues include instrument selection, wellbore trajectory, rig-up technique, and costs, while operational issues include centralization, drag buckling, equipment compatibility, and a variety of miscellaneous on- and off-site equipment checks. By jointly addressing these and other issues with a multidisciplinary team prior to the job, costly downtime will be minimized, and logging objectives will be more clearly defined and easily achieved.

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