Occidental Petroleum 2015 Annual Report Download - page 85
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Natural Gas Reserves
United
Latin
Middle East/
States
America
North Africa (a)
Total
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)
2,012
24
2,687
4,723
Revisions of previous estimates
(111)
3
(273)
(381)
Improved recovery
284
4
25
313
Extensions and discoveries
27
—
101
128
Purchases of proved reserves
46
—
—
46
Sales of proved reserves
(371)
—
—
(371)
Production
(173)
(4)
(154)
(331)
1,714
27
2,386 4,127
Revisions of previous estimates (b)
Improved recovery
Extensions and discoveries
Purchases of proved reserves
Sales of proved reserves
Production
December 31, 2012
1,454
36 1,816 3,306
December 31, 2013
1,495
23 1,684 3,202
December 31, 2014
1,128
26 1,915 3,069
December 31, 2012
501
3 824 1,328
December 31, 2013
517
1 1,003 1,521
December 31, 2014
586
1
471
1,058
(a) Over half of proved reserve amounts relate to PSCs and other similar economic arrangements.
(b) Revisions of previous estimates were primarily price and price-related.
(c) Approximately 7 percent of the proved developed reserves at December 31, 2015 are nonproducing, primarily associated with Oman.
(d) 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.
80