снятие натурных остатков нефти gen.

[vermont5]

Ежемесячно производится снятие натурных остатков нефти и фиксация объемов добычи и сдачи и других параметров за отчетный месяц.

My translation - Physical inventory count of oil residual is made on the 1st day of each month as well as volumes of oil production, transfer and other parameters for the accounting month.

[tumanov1]

http://en.wikipedia.org/wiki/Stock-taking

Stock-taking or inventory checking is the physical verification of the quantities and condition of items held in an inventory or warehouse. This may be done to provide an audit of existing stock valuation. It is also the source of stock discrepancy information.

Stock-taking may be performed as an intensive annual check or may be done continuously by means of a cycle count.[1]

The above is also referred to Periodic Count. Periodic counting is usually undertaken for regular, inexpensive items. The term 'Periodic' generally refers to annual stock count. However, periodic may also refer to half yearly, Quarterly, monthly, bi-monthly or daily.

For expensive items a shorter period of stock-taking is preferred.