In November 1992, a 2000-ft horizontal well was drilled in the Chuchupa Field, offshore Colombia. Chuchupa is a major gas field in Colombia, contributing about 90% of the gas supply for electricity generation on the northern coast of Colombia. This paper documents the selection, planning, reservoir simulation, drilling, completion and operation phases of this project. The horizontal well, Chuchupa 14, was successfully drilled from an offshore platform in 200 ft of water with a total horizontal displacement of 2000 ft. The entry point of the horizontal well is 6300 ft away from the platform. The formation is a semi-consolidated Chuchupa sandstone at a depth of 5325 ft sub sea, with average thickness of 167 ft, and average permeability of 209 md. Initial production test indicated that the well could be produced at 60 MMSCF/day on a 44/64" choke. This production rate is 4 to 6 times that of a conventional vertical well. Currently, the well is being produced from 40 to 60 MMSCF/day. In this application, the horizontal well can replace at least four vertical wells. With the development of horizontal wells, a significant amount of savings can be realized with fewer platforms and wells needed to develop the remainder of the field.

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