A second successful appraisal on the Corrib field approximately 40 miles from Achill Island, off the west coast of Ireland has been drilled. The well, 18/25-1, is located in block 18/25 in the Slyne Trough in a water depth of 1148 feet and is approximately 1 mile from the first appraisal well, 18/20-2z. It was drilled by Sedco Forex’s semisubmersible, Sedco 711 to 12,273 feet total vertical depth subsea in the Triassic Sherwood sandstone. The well achieved test rates of up to 64 million standard cubic feet of gas per day through a 1 1/4 inch choke with a flowing wellhead pressure of 1,653 psi. This test rate was limited by the testing equipment.
Enterprise Oil is the operator of the block with a 45 percent interest, other co-venturers include Saga Petroleum Ireland Ltd. with 21.5 percent, Marathon International Petroleum Hibernia Ltd with 18.5 percent and Statoil Exploration (Ireland) Ltd. with 15 percent.