Shares in ShaMaran Petroleum (TSX VENTURE:SNM) rose 8% today following an update on its Atrush-1 exploration well in Kurdistan.
The well was spudded on October 5, 2010 and 9 5/8″ intermediate pipe was set after logging the Jurassic section to the top of Kurrachine at a depth of approximately 2,230 metres. Drilling operations have progressed well and results to date have met pre-drill expectations.
The first zone of interest was encountered slightly higher than prognosis at 800 metres in the Lower Cretaceous Garagu and Lower Sarmord formations. Below the Garagu shale top seal, a small amount of live oil was visible in the mud pits before total lost circulation occurred, indicating a possible oil-bearing zone with excellent fracture reservoir properties. Logs suggest a gross fractured interval of 80 metres with a matrix porosity of 8%. The zone was isolated behind casing for possible later testing, which would be required to make any determination of this zone’s prospectivity.
After setting 13 3/8″ casing, drilling continued in the Jurassic Barsarin-Sargelu-Alan-Mus (“BSAM”) interval. Live oil was encountered continuously at the surface during the drilling of these formations. An oil-stained core was recovered from the Lower Jurassic Mus formation which consisted of highly fractured porous dolomite. The potential gross oil column encountered in the BSAM was 250 metres, with shows down to the base of the formation with no clear oil-water contact.
Drilling continued in the 12 1/4 inch hole to the third zone of interest of the Lower Jurassic Butmah formation, which was encountered at 1,460 metres. The porous dolomite reservoir provided abundant live oil at the surface during drilling until a depth of 1540 metres, indicating a minimum column of 80 metres, which may or may not be connected to the BSAM reservoir above. The deeper Butmah section down to at least 1750 meters indicated possible fractured and occasionally porous oil-bearing dolomites based on logs and more subtle oil drilling shows. Reservoir pressure measurements have confirmed an oil gradient in the main reservoir with no clear water leg detected.
Logging results are still being evaluated, but preliminary analysis suggests combined BSAM/Butmah reservoir section of approximately 200 meters of net pay using 8% porosity and 40% oil saturation cutoff. Fractured and lower porosity zones could add several hundred meters to this pay count. These formation evaluation results are preliminary and production test are planned for these zones for a determinative assessment.
The forward plan is to drill the remaining three to four zones of interest that are expected in the deeper 8 1/2 inch hole section (stacked reservoirs in the Kurra Chine formation).
Pradeep Kabra, President and CEO of ShaMaran, commented, “We are very pleased with the progress and preliminary results on the Atrush-1 well. The well is going according to plan and we are looking forward to announcing the detailed results of the well in early 2011.”
The well is being operated by the joint-venture company General Exploration Partners Inc. (“GEP”) which holds an 80% interest in the Block. Aspect Holdings, LLC through its Aspect Energy International LLC subsidiary has a two thirds interest and ShaMaran Petroleum Corp. (TSX VENTURE:SNM) through its wholly owned subsidiary, ShaMaran Ventures BV, holds a one third interest in GEP. Marathon Petroleum KDV B.V., a wholly owned subsidiary of Marathon Oil Corporation (NYSE: MRO), holds a 20 percent interest in the block.