In 2009 Petroleum Development Oman LLC (PDO) started an ambitious tight and deep gas exploration programme exploring for previously untapped reservoirs. The exploration strategy is focusing on both conventional tight gas plays as well as deep unconventional gas resources. These resources are typically in previously undrilled formations at great depths, with high temperatures and unknown pressure regimes, and uncertain fluid fill and composition. The unique geological properties of this type of reservoir require different strategies and technology deployment in order to make them viable and sustainable.With unique Geomechanical, reservoir, and geological properties, some of the large gas-bearing prospects within the Fahud Basin in the Sultanate of Oman require innovative drilling and completion practices. A revised drilling and completion workflow, with specific technology deployment and operational flexibility, has been developed in order to account for such reservoir complexity. This workflow includes the incorporation of rock strength acquisition and stress state of the reservoir prior to completion, in order to identify targets for hydraulic fracturing and quantify hydraulic fracturing performance versus reservoir deliverability. The unparalled challenges encountered whilst exploring for these resources required resolving to new technologies from outside the region and adapting them to local conditions (Briner et al, 2012). This paper demonstrates how the understanding of the Geomechanical stress regime obtained through the integration of data from multiple Petroleum Engineering disciplines helped to determine the location & orientation for the first horizontal well in a new Tight Gas discovery. In addition the paper will summarize the results of a Geomechanical analysis that aided the planning of appropriate hydraulic system to maintain borehole integrity in the Build-Up and Horizontal sections of the well through the highly stressed overburden and reservoir sections.

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Since 1987, the Geological Survey of Greenland (GGU) has been engaged in a re-assessment of the geology and petroleum potential of the region offshore southern West Greenland. In I994, a milestone was reached in this study when, for the first time, a fairly complete understanding of the regional structure and stratigraphy of all of the sedimentary basins and the continental margin off shore southern West Greenland was achieved. This paper presents an account of how the work was carried out and gives a summary of the geological results. Due to the area being offshore, its investigation required the interpretation of geophysical data, primarily seismic data, tied to boreholes.

This paper outlines the evidence for the possible existence of very large gas reserves offshore southern West Greenland. It is a slightly modified version of a paper published in the Oil & Gas Journal, August 22nd 1994. Recent interpretation of new seismic data acquired off­shore southern West Greenland (Fig. 1) has identified a number of structural leads which may contain gas reserves with a cumulative volume of the order of 100 tcf. The presence of two flat-spots with clear Amplitude Versus Offset (AYO) effects overlying a possible oil column is the most direct indication of the occurrence of gas in the area.

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