دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the exhaustion of a resource.2. a reduction in income reflecting the exhaustion of a resource. The concept of depletion recognizes that a natural resource such as oil is used up over several accounting periods and permits the value of this resource to be expensed periodically as the resource is exhausted.

reducing the fluid content of a formation by production of that fluid.

n: 1. decrease in value of an asset such as a plant or equipment due to normal wear or passing of time;real property (land) does not depreciate. 2. an annual reduction of income reflecting the loss in useful value of capitalized investments by reason of wear and tear. The concept of depreciation recognizes that the purchase of an asset other than land will benefit several accounting cycles (periods) and should be expensed periodically over its useful life.

adj: deducted from income in the year in which the expenditure is incurred.