Terms, Abbreviations and Acronyms by O


OBEVA  OBDT Evaluation Report
OBCS  Ocean Bottom Cable System
OBC Ocean-bottom cable (seismic collection)
OT  Off Tree
ONRR Office of Natural Resources Revenue
ONNR  Office of Natural Resources Revenue (formerly MMS)
OFST  Offset Vertical Seismic Profile
OVSP Offset vertical seismic profiling
OIM Offshore installation manager
OOE  Offshore Operation Engineer (senior technical authority on an offshore oil platform)
OOC Offshore Operators Committee
OPITO  Offshore Petroleum Industry Training Organization
OSV Offshore support vessel
OTC Offshore Technology Conference
OVID  Offshore Vessel Inspection Database
O&G  Oil and Gas
OCIMF  Oil Companies International Marine Forum
OCI  Oil Corrosion Inhibitor (Vessels)
OCTG Oil country tubular goods
ODT  Oil Down To
OIP Oil in place
OML Oil mining lease
ONAN  Oil Natural Air Natural cooled transformer
Brownfields Oil or gas fields that are beyond their production plateau but are still producing
SO Oil saturation
OSCP Oil spill contingency plan
OSFR Oil spill financial responsibility
OSLTF Oil Spill Liability Trust Fund
OSRO Oil spill response organization
OSRP Oil spill response plan
OSRV Oil spill response vessels
OSRAM Oil Spill Risk Analysis Model
OSRA Oil spill risk assessment
OUT  Oil Up To
OWC  Oil Water Contact
Sweet Oil/gas that has low sulfur content
Sour Oil/gas with high sulfur content
OWR Oil/water ratio
OBM  Oil-Based Mud
OWC  Oil-Water Contact
OTJ On the job
OTSG  One time Through Steam Generator
1D One-dimensional (usually a checkshot seismic survey)
OSC On-scene coordinator
MOMR OPEC Monthly Oil Market Report
ORB OPEC reference basket (of crudes)
OH Open hole
OHC  Open Hole Completion
OHGP Openhole gravel pack
OH  Openhole Log
OPEX Operating expenditure
OP Operating procedure
OTIP  Operational Testing Implementation Plan
O&M  Operations and Maintenance
OPL  Operations Log
OPS  Operations Report
OTL  Operations Team Leader
OTDR  Optical Time Domain Reflectometry
OECD Organization for Economic Co-operation and Development
OAPEC Organization of Arab Petroleum Exporting Countries
OPEC Organization of Petroleum Exporting Countries
ORICO  Oriented Core Data Report
OMRL  Oriented Micro-Resistivity Log
OEM  Original Equipment Manufacturer
OOIP Original oil in place
ORM Other regulated materials (a DOT materials classification)
OOS Out of service
OOT  Out of Tolerance
OCS Outer Continental Shelf
OD  Outer Diameter (of a tubular component such as casing)
OUT  Outpost, Lahee classification
OS&D  Over, Short & Damage (Report)
OB Overbalanced
OPRES  Overpressure Log
OVCH  Oversize Charts
OT Overtime
OI  Oxygen Index