Nabrajah-5 in Block 43 Yemen has top Qishn target 1.5 km south of the Nabrajah # 4 discovery. As previously reported preliminary results from logging indicated that the Qishn S1A sand contains hydrocarbon in thin sand beds with relatively poor reservoir quality. The Qishn S2 sand is water bearing. Interesting hydrocarbon indications and log responses were also observed in the Saar formation carbonates. This zone is producing oil in the neighboring blocks 10 and 14.
An additional well objective was to appraise the gas discovery in Nabrajah # 2. If gas is proved in basement in Nabrajah # 5 the well is planned to be completed as a gas producer. The gas will be utilized on the Nabrajah Field to replace diesel to run generators. This has potential savings on operating costs and for comparison the current annual diesel consumption on Tasour Field in the range of US $5 million.
As of this morning Nabrajah # 5 has reached a depth of 2.775 meters, which is some 125 meters into basement. In the Kholan interval immediately above basement strong hydrocarbon indications were observed during drilling. Preliminary evaluations confirm the presence of heavier components, which indicates oil. Further evaluations as well as testing would be required to confirm the nature of these hydrocarbons and if the hydrocarbons are movable.
Strong hydrocarbon indications have also been observed while drilling the fractured section in the basement, which is the interval carrying the movable hydrocarbons in the basement within the area. The latest successful basement wells in the neighboring blocks have been capable of producing oil in the range of 800 - 10000 bopd.
The forward plan is to drill further into the basement interval and to run electrical logs. Following further evaluations of the observations so far and evaluation of the electrical logs, a test program for the well will be decided.
DNO is the Operator of Block 43 holding a 56.67 % working interest.
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