Oilfield Terms Starting with "O"

The oil window is the range of burial depth and temperature in which a source rock’s kerogen generates liquid oil, below the immature zone and above the gas window.

Operating Expenditure (OPEX) refers to the ongoing costs required to run and maintain a petroleum asset or project on a day-to-day basis. In the oil…

An offshore platform is a large, fixed or floating structure engineered to support the drilling, extraction, processing, and temporary storage of hydrocarbons (crude oil and…

Oil in Place (OIP) is the total volume of crude oil that is estimated to be contained within a natural underground reservoir before any production…

Oil saturation (commonly denoted as So) is a fundamental petrophysical property that quantifies the fraction of pore space within a reservoir rock that is occupied…

An oil well is a borehole drilled into the Earth’s subsurface to access and extract liquid petroleum (crude oil) and associated hydrocarbons. It is the…

Overbalance perforating is a well intervention technique used to create holes in casing, cement, and formation to establish hydraulic communication between the reservoir and the…