Arctic National Wildlife Refuge, 1002 Area,
Petroleum Assessment, 1998

Figure 5A

Histogram showing the expected (mean) number of petroleum accumulations estimated to exist in various size categories of technically recoverable oil resources in this assessment. For each size category, histogram bar on left is for undeformed area and bar on right is for deformed area. Each histogram bar is divided into Federal (1002 area) and non-Federal portions. The histogram is read as follows: It is estimated that the undeformed area contains approximately three accumulations containing between 512 and 1,024 million barrels of technically recoverable oil; two of those accumulations are under Federal jurisdiction and one is non-Federal. Adding the accumulations in the undeformed area to those of the deformed area for each size category gives the total number of those sized accumulations for the entire assessment area (1002 area plus non-1002).

Figure 5B

Histogram showing the expected (mean) volume of oil estimated to exist in each accumulation-size category of technically recoverable oil resources. For each size category, histogram bar on left is for undeformed area and bar on right is for deformed area. Each histogram bar is divided into Federal and non-Federal portions. The histogram is read as follows: It is estimated that the undeformed area contains approximately 1,800 million barrels of technically recoverable oil in accumulations containing between 512 and 1,024 million barrels of technically recoverable oil; approximately 1,300 MMBO is Federal and approximately 500 MMBO is non-Federal. Adding the volume of oil in the undeformed area to that of the deformed area for each size category gives the total volume of those sized accumulations for the entire assessment area (1002 area plus non-1002).