Chevron 2015 Annual Report Download - page 79

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Supplemental Information on Oil and Gas Producing Activities - Unaudited
In 2014, extensions and discoveries in the Midland and Delaware basins and the Gulf of Mexico were primarily responsible
for the 164 million barrel increase in the United States.
In 2015, extensions and discoveries in the Midland and Delaware basins were primarily responsible for the 137 million barrel
increase in the United States.
Purchases In 2014, the purchase of additional reserves in Canada was responsible for the 26 million barrel increase in
synthetic oil.
Sales In 2014, the sale of the company’s interests in Chad was responsible for the 20 million barrel decrease in Africa.
Net Proved Reserves of Crude Oil, Condensate, Natural Gas Liquids and Synthetic Oil
Consolidated Companies Affiliated Companies
Total
Consolidated
Millions of barrels U.S.
Other
Americas1Africa Asia
Australia/
Oceania Europe
Synthetic
Oil2Total TCO
Synthetic
Oil Other3
and Affiliated
Companies
Reserves at January 1, 2013 1,359 223 1,130 837 134 157 513 4,353 1,732 232 164 6,481
Changes attributable to:
Revisions 55 25 94 84 7 17 40 322 32 (3) 3 354
Improved recovery 26 — 10 10 — 11 — 57 — — — 57
Extensions and discoveries 55 4 13 2 — 4 — 78 — — — 78
Purchases 2 9 —— — — —11 — — — 11
Sales (3) — (1)— — — — (4) — — — (4)
Production (164) (18) (142) (141) (10) (23) (16) (514) (96) (9) (13) (632)
Reserves at December 31, 201341,330 243 1,104 792 131 166 537 4,303 1,668 220 154 6,345
Changes attributable to:
Revisions 90 — 74 80 19 9 (32) 240 41 (4) — 277
Improved recovery 19 1 1 8 — 5 — 34 — — — 34
Extensions and discoveries 164 18 2 7 — 8 19 218 — — 1 219
Purchases 1 — —— — — 26 27 — — — 27
Sales (6) — (20) — — (3) — (29) — — — (29)
Production (166) (24) (140) (135) (8) (19) (16) (508) (94) (12) (10) (624)
Reserves at December 31, 201441,432 238 1,021 752 142 166 534 4,285 1,615 204 145 6,249
Changes attributable to:
Revisions (1) (9) 60 164 14 (3) 80 305 163 — (4) 464
Improved recovery 7 — 11 2 — — — 20 — — — 20
Extensions and discoveries 137 28 4 5 5 — — 179 — — — 179
Purchases — ——— — — —— — —— —
Sales (6) — (7) — — — — (13) — — (13)
Production (183) (21) (132) (133) (8) (20) (17) (514) (102) (11) (10) (637)
Reserves at December 31, 201541,386 236 957 790 153 143 597 4,262 1,676 193 131 6,262
1Ending reserve balances in North America were 155, 142 and 141 and in South America were 81, 96 and 102 in 2015, 2014 and 2013, respectively.
2Reserves associated with Canada.
3Ending reserve balances in Africa were 34, 37 and 37 and in South America were 97, 108 and 117 in 2015, 2014 and 2013, respectively.
4Included are year-end reserve quantities related to production-sharing contracts (PSC) (refer to page 8 for the definition of a PSC). PSC-related reserve quantities are
20 percent, 19 percent and 20 percent for consolidated companies for 2015, 2014 and 2013, respectively.
Chevron Corporation 2015 Annual Report 77