Abstract
Summary This paper describes studies by Esso E&P U.K. that evaluate various completion strategies for new subsea wells in the Cormorant field, U.K. North Sea. These studies, which complement work done by the field operator (Shell U.K. E&P), include detailed reservoir description work to define oil-in-place (OIP) and permeability distribution and a waterflood simulation for a representative reservoir cross section. Wellbore, flowline, and pipeline hydraulics for the complex production/injection system are included to model well rates more accurately. The results provide general insight into the nature of displacement during waterflooding of a stratified section with a limited number of wells. They also provide specific guidance on (1) dual vs. single completions; (2) perforating, testing, and stimulation sequence; and (3) the benefits of partially perforating high-permeability sands.
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