MBbl

Mbbl is a unit of volume used in the oil and gas industry to denote one thousand barrels of oil or condensate. The term is often written as Mbbl or MBbl, with capitalization varying by organization or regional practice. By contrast, MMbbl is used to denote one million barrels. In daily production and reserve reporting, Mbbl or Mbbl/d may appear, sometimes alongside MMbbl or MMbbl/d.

A single barrel (Bbl) is standardly defined as 42 United States gallons, about 159 liters. Therefore one Mbbl equals 1,000 barrels, and one Mbbl/d represents a production rate of 1,000 barrels per day. For example, a field producing 25 Mbbl/d delivers 25,000 barrels of oil each day. Large-scale production figures are commonly presented in Mbbl or MMbbl to maintain readability for substantial volumes.

Usage notes:

- Mbbl is widely used for discrete volumes (total reserves or field output) and for daily production rates when thousands of barrels are involved.

- MMbbl or MMbbl/d typically denotes millions of barrels or millions of barrels per day, respectively.

- Some organizations prefer MBbl or mbbl, so readers should verify the intended scale in organizational documentation.

See also: Bbl (barrel), Mbbl/d or MBbl/d, MMbbl, MMbbl/d.