Occidental Petroleum 2014 Annual Report Download - page 84
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Gas Reserves
United
Latin
Middle East/
States
America
North Africa (a)
Total
2,449
33
1,925
4,407
Revisions of previous estimates
(581)
—
62
(519)
Improved recovery
207
11
34
252
Extensions and discoveries
7
—
784
791
Purchases of proved reserves
80
—
—
80
Production
(207)
(5)
(165)
(377)
1,955
39
2,640
4,634
Revisions of previous estimates
(46)
(11)
(43)
(100)
Improved recovery
251
1
16
268
Extensions and discoveries
13
—
232
245
Purchases of proved reserves
34
—
—
34
Sales of proved reserves
(2)
—
—
(2)
Production
(193)
(5)
(158)
(356)
Revisions of previous estimates
Improved recovery
Extensions and discoveries
Purchases of proved reserves
Sales of proved reserves
Production
December 31, 2011
1,723
32 1,555 3,310
December 31, 2012
1,454
36 1,816 3,306
December 31, 2013
1,495
23 1,684 3,202
December 31, 2011
726
1 370 1,097
December 31, 2012
501
3 824 1,328
December 31, 2013
517
1 1,003
1,521
(a) A substantial majority of proved reserve amounts relate to PSCs and other similar economic arrangements.
(b) Approximately 26 percent of the proved developed reserves at December 31, 2014 are nonproducing, primarily associated with the Al Hosn gas project.
(c) A portion of the proved undeveloped reserves associated with the Al Hosn gas project is expected to be developed beyond five years and is tied to an approved long term development project.
82