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Changes in reserves              
CHANGES IN LIQUIDS RESERVES          
(in millions of barrels)    
Consolidated Subsidiaries
   
  Europe Africa North
America		 Far
East		 Rest
of
world		 Total
Consolidated		 Equity
affiliates
& non
consolidated		 Total group
Proved developed and undeveloped reserves            
Balance as of December 31, 1997 1,296 2,087 96 115 521 4,115 1,790 5,905
Revisions of previous estimates 134 130 3 23 84 374 (24) 350
Extensions, discoveries and other 67 237 3 - 191 498 83 581
Acquisitions of reserves in place 13 - - - - 13 - 13
Sales of reserves in place (18) - (16) - - (34) - (34)
Production for the year (157) (221) (6) (10) (56) (450) (98) (548)
Balance as of December 31, 1998 1,335 2,233 80 128 740 4,516 1,751 6,267
Revisions of previous estimates 113 275 (31) (13) (87) 257 (24) 233
Extensions, discoveries and other 50 204 30 2 687 973 3 976
Acquisitions of reserves in place - - - 1 - 1 - 1
Sales of reserves in place - - (26) - (45) (71) (2) (73)
Production for the year (150) (210) (5) (10) (68) (443) (93) (535)
Balance as of December 31, 1999 1,348 2,502 48 108 1,227 5,233 1,635 6,868
Revisions of previous estimates (20) 225 (1) 11 112 327 11 338
Extensions, discoveries and other 29 261 3 1 53 347 - 347
Acquisitions of reserves in place 3 - - - - 3 - 3
Sales of reserves in place (40) (22) (7) - (4) (73) - (73)
Production for the year (146) (205) (3) (9) (63) (426) (97) (523)
Balance as of December 31, 2000 1,174 2,761 40 111 1,325 5,411 1,549 6,960
Revisions of previous estimates 117 250 (5) (10) 89 441 (40) 401
Extensions, discoveries and other 34 67 - 2 30 133 - 133
Acquisitions of reserves in place - 3 - - - 3 - 3
Sales of reserves in place (3) (2) - - - (5) - (5)
Production for the year (152) (197) (2) (9) (77) (437) (94) (531)
Balance as of December 31, 2001 1,170 2,882 33 94 1,367 5,546 1,415 6,961
 
 
Minority interest in proved developed and undeveloped reserves        
December 31, 1997 - 81 - - - 81 - 81
December 31, 1998 26 60 - - - 86 - 86
December 31, 1999 36 60 - - - 96 - 96
December 31, 2000 35 56 - - - 91 - 91
December 31, 2001 33 75 - - - 108 - 108
 
 
Proved developed reserves                
December 31, 1997 802 1,068 35 85 406 2,396 1,775 4,171
December 31, 1998 845 1,052 22 93 538 2,550 1,661 4,211
December 31, 1999 975 1,176 14 74 423 2,662 1,570 4,232
December 31, 2000 824 1,156 9 69 416 2,474 1,023 3,497
December 31, 2001 870 1,128 6 53 530 2,587 858 3,445
All references to reserves are to the Company’s share of such reserves, net of any liquids that may be taken by third parties as royalties in kind.
 

CHANGES IN GAS RESERVES          
(in billions of cubic feet) Consolidated Subsidiaries    
  Europe Africa

North
America

Far
East

 Rest
of
world		 Total
Consolidated		 Equity
affiliates
& non
consolidated		 Total
group
Proved developed and undeveloped reserves            
Balance as of December 31, 1997 7,302 2,360 705 6,139 921 17,427 1,590 19,017
Revisions of previous estimates 157 158 66 356 83 820 10 830
Extensions, discoveries and other 326 - 126 93 13 558 46 604
Acquisitions of reserves in place 58 - 1 - 24 83 - 83
Sales of reserves in place (59) - (216) - - (275) - (275)
Production for the year (676) (14) (120) (253) (71) (1,134) (43) (1,177)
Balance as of December 31, 1998 7,108 2,504 562 6,335 970 17,479 1,603 19,082
Revisions of previous estimates 520 (62) (85) 654 141 1,168 16 1,184
Extensions, discoveries and other 553 - 189 25 354 1,121 100 1,221
Acquisitions of reserves in place - - - 81 - 81 - 81
Sales of reserves in place (24) - (28) - (50) (102) - (102)
Production for the year (625) (51) (94) (312) (77) (1,159) (54) (1,213)
Balance as of December 31, 1999 7,532 2,391 544 6,783 1,338 18,588 1,665 20,253
Revisions of previous estimates 510 (135) 26 8 176 585 2 587
Extensions, discoveries and other 97 236 98 109 734 1,274 75 1,349
Acquisitions of reserves in place 2 - - - - 2 - 2
Sales of reserves in place (66) - (45) - - (111) - (111)
Production for the year (654) (122) (88) (353) (91) (1,308) (67) (1,375)
Balance as of December 31, 2000 7,421 2,370 535 6,547 2,157 19,030 1,675 20,705
Revisions of previous estimates 122 863 (5) 170 67 1,217 97 1,314
Extensions, discoveries and other 118 746 87 74 307 1,332 - 1,332
Acquisitions of reserves in place - - - - 80 80 - 80
Sales of reserves in place (20) - - - - (20) - (20)
Production for the year (675) (134) (81) (407) (104) (1,401) (81) (1,482)
Balance as of December 31, 2001 6,966 3,845 536 6,384 2,507 20,238 1,691 21,929
 
 
Minority interest in proved developed and undeveloped reserves    
December 31, 1997 - 9 - - - 9 - 9
December 31, 1998 96 7 - - - 103 - 103
December 31, 1999 138 8 - - - 146 - 146
December 31, 2000 142 7 - - - 149 - 149
December 31, 2001 141 30 - - - 171 - 171
 
 
Proved developed reserves                
December 31, 1997 4,547 156 483 3,519 457 9,162 597 9,759
December 31, 1998 4,264 565 308 4,457 671 10,265 857 11,122
December 31, 1999 5,054 1,824 351 4,664 654 12,547 1,665 14,212
December 31, 2000 5,336 1,555 334 4,089 701 12,015 1,675 13,690
December 31, 2001 5,185 1,287 294 3,800 934 11,500 1,660 13,160
All references to reserves are to the Company’s share of such reserves, net of any gas that may be taken by third parties as royalties in kind.
 

CHANGES IN LIQUIDS AND GAS RESERVES        
(in millions of barrels of oil equivalent)     Consolidated subsidiaries    
  Europe Africa North
America		 Far
East		 Rest
of
world		 Total
Consolidated		 Equity
affiliates
& non
consolidated		 Total
group
Proved developed and undeveloped reserves      
Balance as of December 31, 1997 2,574 2,500 214 1,169 695 7,152 2,091 9,243
Revisions of previous estimates 165 158 16 81 99 519 (23) 496
Extensions, discoveries and other 124 237 24 14 193 592 92 684
Acquisitions of reserves in place 23 - - - 5 28 - 28
Sales of reserves in place (28) - (52) - - (80) - (80)
Production for the year (275) (223) (27) (55) (69) (649) (107) (756)
Balance as of December 31, 1998 2,583 2,672 175 1,209 923 7,562 2,053 9,615
Revisions of previous estimates 220 265 (45) 119 (67) 492 (21) 471
Extensions, discoveries and other 149 204 62 6 753 1,174 22 1,196
Acquisitions of reserves in place - - - 14 - 14 - 14
Sales of reserves in place (4) - (30) - (54) (88) (2) (90)
Production for the year (259) (220) (21) (66) (83) (649) (102) (751)
Balance as of December 31, 1999 2,689 2,921 141 1,282 1,472 8,505 1,950 10,455
Revisions of previous estimates 156 233 6 23 147 565 12 577
Extensions, discoveries and other 45 308 21 19 189 582 14 596
Acquisitions of reserves in place 4 - - - - 4 - 4
Sales of reserves in place (51) (23) (15) - (4) (93) - (93)
Production for the year (267) (228) (20) (72) (80) (667) (110) (777)
Balance as of December 31, 2000 2,576 3,211 133 1,252 1,724 8,896 1,866 10,762
Revisions of previous estimates 102 416 1 26 92 637 (22) 615
Extensions, discoveries and other 56 225 16 15 85 397 - 397
Acquisitions of reserves in place - 3 - - 12 15 - 15
Sales of reserves in place (7) (2) - - - (9) - (9)
Production for the year (277) (223) (17) (80) (95) (692) (110) (802)
Balance as of December 31, 2001 2,450 3,630 133 1,213 1,818 9,244 1,734 10,978
 
 
Minority interest in proved developed and undeveloped reserves      
December 31, 1997 - 83 - - - 83 - 83
December 31, 1998 42 61 - - - 103 - 103
December 31, 1999 60 61 - - - 121 - 121
December 31, 2000 62 58 - - - 120 - 120
December 31, 2001 58 80 - - - 138 - 138
 
 
Proved developed reserves                
December 31, 1997 1,601 1,095 116 720 492 4,024 1,971 5,995
December 31, 1998 1,597 1,149 74 844 665 4,329 1,901 6,230
December 31, 1999 1,869 1,497 74 869 542 4,851 1,802 6,653
December 31, 2000 1,840 1,450 68 768 615 4,741 1,269 6,010
December 31, 2001 1,822 1,372 62 698 698 4,652 1,171 5,823
All references to reserves are to the Company’s share of such reserves, net of any liquids or gas that may be taken by third parties as royalties in kind.
 
 
 
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