New Dual Completion Method Eliminates Bottom Water Coning

Abstract

Abstract This paper discusses the design, implementation, and results of a new completion method to eliminate bottom water coning. This method uses a dual completion in the same zone to produce water-free oil at higher rates than conventional completions. This is accomplished by producing water from perforations below the oil-water contact, at the same time that oil is being produced from perforations at the top of the sand. The method is currently being used in the Nebo Hemphill Field in North Louisiana. Mathematical models are used to assist in the design of this completion. With this modeling, the perforation spacing is determined, along with an estimate of the water production needed to prevent coning. The first well to use this new completion method has been on production for over a year. This paper documents the production rates, and economic success of the test well using this completion method.