History and Performance Prediction of Umm Farud Field, Libya

Abstract

Libya's Umm Farud field is unique in that it will have been discovered, developed, and depleted within 10 years. Computer simulation, used to select optimum injection and production rates, predicted a 21-percent recovery of original oil in place, and field data indicate that performance is reflecting the prediction. Introduction The purpose of this paper is to present a summary of the engineering data relating to the Umm Farud field. The production history of the reservoir is sufficient to allow at least a partial evaluation of the reservoir during the primary depletion and early injection phases. phases. In recent years, there has been an increasing interest in reservoir simulation techniques utilizing computers. In this study, the water injection distribution during secondary recovery operations has been predicted by computer simulation. The predictive predicted by computer simulation. The predictive portion of the simulation covers a relatively short portion of the simulation covers a relatively short period of 3 to 5 years. This short field fife lends itself period of 3 to 5 years. This short field fife lends itself to an economic re-evaluation of the reservoir mechanism and the simulation procedures. Field Development The Umm Farud field was discovered by Phillips Petroleum Co. in Nov., 1962. Fig. 1 shows the field's Petroleum Co. in Nov., 1962. Fig. 1 shows the field's location in North Central Libya on Concession 92. The discovery well, A-1, was drilled on a seismic closure about 17 miles from the nearest production. The well was completed in the Dahra "B" dolomite at 3,035 ft and the Mabruk "A" dolomite at 3,212 ft. Initial potential from both zones was 2,285 bbl oil. Subsequent drilling established additional production from two zones in the Bu Charma "B" limestone production from two zones in the Bu Charma "B" limestone at 2,700 ft and 2,744 ft. All zones are commingled down hole. The field development was completed with the drilling of seven oil producers, six injection wells, and three water supply wells. All wells are completed with casing set through the producing intervals. The producing wells are equipped producing intervals. The producing wells are equipped with submersible pumps capable of lifting 2,500 BFPD. JPT P. 570