Notional Field Development Final Report - EBN

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EBN Notional Field Development Plan 3.1.5 The Aalburg interval is showing 10-16 degree dip and too high dip rates for even a moderate reach horizontal well. Regional Stress Figure 3-11, World Stress Map & Lower Jurassic Structure EBN supplied stress map has regional faults and Sh max generally oriented NW x SE. A typical horizontal well azimuth with expectations of transverse frac placement should then be drilled NE x SW. Care should be taken to actually analyze the local stress field with oriented dipole sonics and borehole image logs run in vertical pilot holes at different locations. There is some significant local twisting of major faults as mapped under the proposed project area. 3.1.6 Petrophysical Summary & Recommendations Posidonia shale has excellent effective porosity even if we have to ultimately discount some of it. It has a good solid range of excellent TOC per foot which should translate into high hydrocarbon volume. We would call it gas condensate or high liquids productive shale until we have data to support otherwise. It is very ductile and soft. It will swallow proppant unless high conductivity designs are pumped using higher prop concentrations and larger size proppant. The obvious faulted wedge below the Posidonia zone in the KWK-01 confirms the presence of high energy tectonic activity that should propagate at least some kind of natural fractures or complex stress © 2011 Halliburton All Rights Reserved 26
EBN Notional Field Development Plan into the shale. Any analysis program should include multiple DFITs (diagnostic fracture injection tests) to confirm PDL (pressure dependent leakoff) behavior that would be caused by natural fractures. We suggest pilot wells be pursued across the proposed project area running all available geochemical and oriented stress logs and then correlate all measurements to full core measurements. Set casing on these wells with tubulars large enough to use the same wells for whip-stock horizontal utility in the near future. The two uppermost intervals of the Aalburg shale should be better evaluated with vertical well testing in the same program. It also has to have a structural dip less than 10 degrees in any particular area to be a viable horizontal target. © 2011 Halliburton All Rights Reserved 27
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