Upstream > Costs incurred Key figures | Key operating ratios | Productions | Changes in reserves | Results of operations | Costs incurred | Capitalized cost | Standardized measure of discounted future net cash flow | Changes in the standardized measure of discounted future net cash flows | Main producing fields | Oil and gas acreage / Number of productive wells | Drilling activities | Liquified natural gas activity | Gas and Power activity | Upstream maps Costs incurred in oil and gas property acquisition, exploration and development activities The following table shows the costs incurred in the Company's oil and gas property acquisition, exploration and development activities: they include both capitalized and expensed amounts. Download Excel table (in million of euros) CONSOLIDATED SUBSIDIARIES Europe Africa North America Far East Rest of the world Total Consolidated As of December 31, 1998 Proved property acquisition 19 2 1 -  15 37 Unproved property acquisition 1 16 56 1 13 87 Exploration costs 187 292 106 67 313 965 Development costs 1,524 905 248 375 541 3,593 TOTAL COSTS INCURRED 1,731 1,215 411 443 882 4,682 As of December 31, 1999 Proved property acquisition -  3 1 -  2 6 Unproved property acquisition 1 202 21 1 1 226 Exploration costs 96 193 135 28 181 633 Development costs 1,283 934 158 320 1,057 3,752 TOTAL COSTS INCURRED 1,380 1,332 315 349 1,241 4,617 As of December 31, 2000 Proved property acquisition 4 -  -  3 -  7 Unproved property acquisition -  5 11 -  -  16 Exploration costs 58 246 170 34 213 721 Development costs 1,225 920 182 151 1,584 4,062 TOTAL COSTS INCURRED 1,287 1,171 363 188 1,797 4,806 Company's share of equity affiliates' costs of property acquisition, exploration and development Year ended December 31, 1998 105 Year ended December 31, 1999 82 Year ended December 31, 2000 105 Key figures | Key operating ratios | Productions | Changes in reserves | Results of operations | Costs incurred | Capitalized cost | Standardized measure of discounted future net cash flow | Changes in the standardized measure of discounted future net cash flows | Main producing fields | Oil and gas acreage / Number of productive wells | Drilling activities | Liquified natural gas activity | Gas and Power activity | Upstream maps