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| English | Russian |
| detailed field appraisal | доразведка (When promising amounts of oil or gas are found in a wildcat well, a programme of detailed field appraisal may begin. The size of the field must be established, and the most efficient production method worked out. This is done in order to assess whether field will be profitable. Appraisal may take several years to complete and it is very costly. (see  fortum.com, 14024, 14026, 14043, 14070, 14071, 14076, 1000, 8266, 8268&level=5) wordfiend) |
| field appraisal | оценка месторождения |