Triangle's Nova Scotia Wells Perform Well in Log Analysis
Triangle Petroleum Corporation (Triangle) reports that log analysis carried out on its Kennetcook 1 (KC 1) and Kennetcook 2 (KC 2) wells in the Windsor Basin of Nova Scotia, Canada, yielded an estimated resource range of 89 to 109 Bcf of OGIP per square mile from the Horton Bluff formation.
These wells were drilled specifically for the purpose of providing Triangle with the necessary technical information in order to fully assess the Upper Devonian to Lower Mississippian shale potential within the Horton Bluff formation. The KC 1 and KC 2 wells were selectively completed and fracture-stimulated in organic rich shale zones. Estimated OGIP for just the completed zones is 42 Bcf per section for KC 1 and 76 Bcf per section for KC 2.
"Our management team is confident that we have a significant unconventional resource play in Nova Scotia," says Clarence Campbell, vice president of exploration. "This assessment is based on the observation of the physical released gas shows from the core samples to the detailed lab measurements and interpretations provided by the shale gas consultants we have engaged."
Extensive coring was undertaken while drilling the two Kennetcook wells including 1,254 feet of core from KC 1 and 392 feet of core from KC 2. More than 140 samples were submitted to multiple labs for analyses that included Leco TOC (total organic carbon content derived from the Leco Corporation carbon analyzer), RockEval (detection of type and maturity of organic matter with the Rock Eval module), organic facies determination, maturity, gas desorption, gas composition, XRD (X-ray diffraction to characterize composition of the shale), CT scans, mechanical rock properties and fluid compatibility studies. Log analysis was derived from the extensive log suites taken on the two wells integrated with core and sample derived data.
A comprehensive interpretation of source rock potential, thermal maturity, headspace gas composition, canister gas desorption, adsorption and composition, and physical properties of selected samples of both wells was performed by the analytical laboratories of the Weatherford Group (Humble Geochemical, OMNI Laboratories, and TICORA Geosciences) and Global Geoenergy Research Ltd.
Log analysis by Schlumberger on the two Kennetcook wells yielded an estimated resource range of 89 to 109 Bcf of OGIP from the Horton Bluff formation. In addition, widely varying samples of the core were immediately placed into canisters after drilling to enable direct desorption testing. Total gas content of the shale as measured from desorbed core samples ranged from 7.9 scf/ton to 190 scf/ton. Schlumberger provided the petrophysical analysis for these two wells.
Average TOC from all shale samples was 10%. Organic matter type was determined by organic facies analysis as Type II/III to Type III. Maturity of the shale in the zones of interest as measured by the vitrinite reflectance ranged from 1.53% to 2.07%, placing the shale's maturity within the peak window for natural gas generation.
X-ray diffraction data (XRD) indicates that the shale in the Horton Bluff contains an average of 52% quartz and carbonate with 42% clays. Clay type has been identified as a predominately kaolinite-illite mixture with more minor amounts of chlorite and mixed layer clays.
The Kennetcook wells have been continuously recovering frac fluids since their initial stimulations, with the exception of a temporary shut-in during the Christmas break. The wells continue to flow frac fluids to the surface. After a slight delay due to rig availability limitations, Triangle recently installed downhole pumps on both wells with the intent to increase frac fluid recovery rates.
Additionally, Triangle has successfully concluded its 25 square mile 3D and 30 mile 2D seismic programs. The seismic data has been processed and the technical team is actively interpreting the data. The seismic will assist Triangle in assessing the total natural gas resource potential within the Kennetcook area and to select future well locations.
"Our corporate strategy is to work with and seek the appropriate joint venture partners," Mark Gustafson, Triangle's president & CEO, commented. "With the excellent base of technical information acquired, we believe it is prudent at this stage of our exploration cycle in the Windsor Basin to seek out appropriate joint venture partners in order to manage our exploration risk and to accelerate our 2008 drilling program. Richard Moorman, Joint Venture Manager, and Andy Prefontaine, Land Manager, are responsible for initiating this process and both will be available at the NAPE convention in Houston on February 7 and 8."
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