Medco spuds S. Sumatra CBM wells
Tuesday, August 31 2010 - 07:13 PM WIB
CBM-SE-04 will be a vertical well with a 3350-foot planned total depth, aimed at evaluating gas potential and reservoir properties of the two main coal groups of the Middle Palembang Formation - the upper Palembang Group and lower Pangadang Group.
Under the terms of the Sekayu PSC, the minimum work commitment requires a total of four wells to be drilled in the first three years.
Indonesia's first commercial coalbed methane exploration well, MedcoEnergi's CBM-SE-02, was drilled in the Sekayu PSC block in the second half of 2009.
MedcoEnergi has contracted two rigs for the sequential drilling and coring of the next three exploration wells in the Sekayu PSC block -- CBM-SE-04, CBM-SE-03, CBM-SE-01.
The three coalbed methane exploration wells - CBM-SE-04, CBM-SE-03, and CBM-SE-01, are planned to be drilled and cased (in that order), by the first rig; the second rig is scheduled to double back to conduct coring operations on CBM-SE-01, CBM-SE-03 and CBM-SE-04.
Once coring operations have been completed, the first rig will be moved back for well testing of reservoir properties including gas composition, coal quality, adsorption and permeability to be conducted in each of the three main coal seams noted below.
The three wells are geographically spaced such that coal thickness and gas content measures are anticipated to provide a strong indication of the overall potential of the block.
The initial evaluation of CBM-SE-01 is proposed to be conducted in the Palembang B Seam at projected interval 1131-1179 feet, with estimated net coal thickness of 35 feet; the second in the Palembang C Seam at interval 1317-1431 feet, with estimated net coal thickness of 65 feet; and the final in the Pangadang A Seam at interval 2184-2293 feet, with estimated net coal thickness of 56 feet. Total anticipated thickness of the three coal seams to be cored and recovered in CBM-SE-01 is approximately 156 feet.
Initial test results from these operations are not expected to be available until the fourth quarter of 2010.
Medco is the block?s operator with 50 percent interest. The remaining balance is held by South Sumatra Energy Inc, in which CBM Asia has 13 percent stake. (alex)