Years ended December 31 (millions of Canadian dollars)			North America	North Sea	Southeast Asia	Sudan	Algeria	Trinidad	Other	Total
2004	Property acquisition costs	Proved	77	233	-	-	-	-	-	310
		Unproved	165	71	-	-	-	-	39	275
	Exploration costs		459	150	54	-	-	34	86	783
	Development costs		785	357	201	-	8	158	-	1,509
	Asset retirement costs		36	51	3	-	-	7	-	97
	Total costs incurred		1,522	862	258	-	8	199	125	2,974
2003	Property acquisition costs	Proved	369	189	-	-	-	-	-	558
		Unproved	184	2	-	-	-	-	3	189
	Exploration costs		336	99	70	7	4	58	90	664
	Development costs		600	397	246	(5)	30	72	-	1,340
	Asset retirement costs		125	285	5	-	-	-	-	415
	Total costs incurred		1,614	972	321	2	34	130	93	3,166
2002	Property acquisition costs	Proved	174	88	-	-	-	-	-	262
		Unproved	50	13	-	-	-	9	-	72
	Exploration costs		271	134	36	27	3	54	43	568
	Development costs		457	297	233	71	103	14	-	1,175
	Total costs incurred		952	532	269	98	106	77	43	2,077