The bulk of proved reserves added through acquisition were vertical Wolfberry in the Midland Basin. Of reserves that moved from unproved to proved, approximately 50 percent were 3 rd Bone Spring sands in the Delaware Basin, approximately 45 percent were vertical Wolfberry in the Midland Basin, and approximately 5 percent were waterfloods in the Central Basin Platform. Twenty-five percent of Energen’s proved reserves are undeveloped.
|Proved Reserves by Basin (MMBOE)|
|Basin||YE11||2012 Production||2012 Acquisitions||Additions||Price/Other Revisions||YE12|
|San Juan Basin||129.6||(9.9||)||0.0||0.9||(19.7||)||100.9|
|Proved Reserves by Commodity (MMBOE)|
|Natural gas liquids||56.2||54.0||4.1|