How fractured reservoirs and a tectonic province boundary relate: clues to possible giant fields

Timothy J. Petta Gemstone Consulting Inc. Houston The western portion of the Williston basin is an attractive exploration target for fractured carbonate reservoirs and large reserves. A Proterozoic tectonic boundary formed by the juxtaposition of the Wyoming and the Trans-Hudson Provinces has formed a suture zone that could contain very large oil and gas reserves. Many large oil and gas fields have been discovered within the area that overlies the suture zone (Fig. 1 [228,009 bytes]), including the complex of fields over the Cedar Creek anticline and Poplar field. Reservoirs within these and other fields in this area often contain fractures. The suture zone contains numerous str...

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