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| Figure 5. Histograms showing the expected (mean) numbers of oil and nonassociated gas accumulations estimated to exist in various size categories of technically recoverable resources in the 2002 U.S. Geological Survey assessment of NPRA. Each histogram bar is divided into Federal and non-Federal portions. Left sides of histograms appear truncated because of minimum accumulation sizes considered in the assessments. A, Expected (mean) numbers of oil accumulations, read as follows: It is estimated that the assessment area contains approximately 10 accumulations containing between 256 and 512 million barrels of technically recoverable oil; 8 of those accumulations are under Federal jurisdiction and 2 are non-Federal. B , Expected (mean) numbers of nonassociated gas accumulations, read as follows: It is estimated that the assessment area contains approximately 15 accumulations containing between 768 and 1,536 billion cubic feet of technically recoverable gas; 14 of those accumulations are under Federal jurisdiction and 1 is non-Federal. | |
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