Vintage Petroleum's second exploration well of the 2002 drilling campaign in Yemen, the An Nagyah #2, has successfully tested 46 degree API oil from the sub-salt Lam formation. The well was drilled to a total depth of 5,327 feet, and based on electric log and other well information, the 65 foot interval from 3,310 to 3,375 feet in the upper Lam sand was selected for testing. The lower section of this interval from 3,345 to 3,375 feet flowed at a sustained, water-free rate of 860 barrels per day of oil and 400 Mcf per day of natural gas with a flowing tubing pressure of 150 psi. After adding perforations from 3,326 to 3,345 feet, the well flowed on a short term test at a water-free rate of 1,091 barrels per day of oil and 543 Mcf per day of natural gas with a flowing tubing pressure of 320 psi. Subsequently, the entire 65 foot interval was tested at a sustained, water-free rate of 410 barrels per day of oil and 3,700 Mcf per day of natural gas with a flowing tubing pressure of 915 psi, indicating the likely presence of gas pay within the upper 16 feet of the pay interval.
This well was drilled to evaluate the An Nagyah structure previously drilled by Shell in 1992 (An Nagyah #1). Although An Nagyah #1 had indicated oil and gas pay in the Lam formation, it was never tested. Vintage is currently evaluating the production tests and other well information in order to formulate a plan to appraise the potential of the An Nagyah structure.
The drilling rig is being mobilized to drill the third well in the current campaign, the An Naeem #3 well. This well is targeting a potential downdip oil leg underlying the gas and condensate found in the intra-salt Alif sand in both the An Naeem #1 and #2 wells drilled by Vintage in 2000. Vintage has a 75 percent working interest in the 850,000 acre S-1 Damis block and is the operator.