The area covered by onshore petroleum licence ON11/1 contains the Doonbeg#1 wildcat well drilled in 1962. A full suite of downhole petrophysical logs exists for the well, which was drilled to a depth 3353m.
Analysis of the Doonbeg#1 well logs indicates an abundance of organic carbon in the Clare Shale from a depth of 792m to 1052m. The analysis also indicates the presence of an organic-rich potential hot shale interval of approximately 150m in thickness. Characteristics observed in the well logs, such as high kicks in the gamma-ray logs, high resistivity values, high neutron density values and high sonic porosity, are almost identical to those observed from known producing gas shale wells.
Based on analysis of the Doonbeg#1 well logs, geological mapping and review of academic literature, it is believed that the Clare Shale may be a source rock for shale gas. A programme of work has been defined and will be performed to determine the prospectivity of the formation. The programme of work includes extensive field studies and technical evaluations to determine drill locations.
Areas of operation
Clare Basin
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