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observer

The director of a seismic acquisition field crew who operates the recording equipment.

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Related Terms

O-ring

A type of circular seal commonly found in downhole tools and a wide range of surface equipment applications. The specifi

OBR

Ratio of the volume percent oil to the volume percent brine in an oil mud, in which each is expressed as a percent of th

OCMA

Pertaining to a drilling-grade bentoniteclay with API/ISO specifications. API specifications for this clay are similar t

OD

Outside or outer diameter. Casing and tubing are commonly described in terms of inside diameter (ID) and outside diamete

OOC

Abbreviation for Offshore Operators Committee, a group of more than 85 oil and gas producers who operate in the Gulf or

OSHA

Abbreviation for Occupational Safety and Health Act of the US. OSHA laws protect safety and health of workers and give w

OSPAR

The Oslo and Paris Commission, formerly known as PARCOM. The commission is a group of experts who advise North Sea count

OWR

Ratio of the volume percent oil to the volume percent water in an oil mud, where each is a percent of the total liquid i

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