Transcripción del resumen del autor. In 2003 OMV AG over the activities of PREUSSAG Energie International and became operator of the Yemeni Block S2 (Al Uqlah). Activities concentrated initially on appraising the Khulan reservoir, which was discovered by the Kharwah I well. Khrwah I was used for long-term testing of a two-meter thick Khulan layer producing reasonably high and constatn oi rate with very little decline. Al Nilam I was drilled to prove the economics of the discovery and also to look into the basement. The well was successful and a development plan was submitted to the Yemeni authorities including drilling some 42 wells, constructing field facilities an building an oil exporting pipeline. Up to now some 22 wells have been drilled, encountering a number of technical difficulties. A number of potential performance improvements were examined and tested, i.e. percussion drilling for the top hole section, aerated mud in the second and third section to avoid losses and stabilize the hole and the use of impregnated diamond bits in the basement section. A real breakthrough gas not yet been achieved.

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