Oil and Gas Terms Beginning with “Q”

Q is the dimensionless quality factor used in seismic data processing and rock physics to quantify the energy attenuation experienced by seismic waves as they propagate through earth materials — defined as the ratio of… Read more →

QA (quality assurance) in oil and gas is the systematic set of planned activities, procedures, and processes designed to provide confidence that equipment, materials, software, or services will fulfill specified… Read more →

A log of formation density from one of the quadrants of an azimuthal density tool. Read more →

Quality assurance in oil and gas is the planned, systematic management framework of policies, procedures, audits, and documentation that an organization implements to provide confidence that its products, services, or… Read more →

A quantile map is a display built from the quantile values of a data set, meaning the values are ranked and assigned a cumulative probability position rather than plotted on their raw measurement scale, so that the… Read more →

Special quantiles at 0%, 25%, 50%, 75% and 100%. Read more →

Quartz is silicon dioxide (SiO2), an abundant rock-forming mineral built from a continuous framework of silica tetrahedra, and it is the single most important mineral in petroleum geology because quartz sand grains are… Read more →

Slang term for quaternary amine. Read more →

A quaternary amine , more precisely a quaternary ammonium compound, is a cationic amine salt in which the central nitrogen atom is bonded to four organic groups and carries a permanent positive charge. The defining… Read more →

What Is Quebracho? Quebracho is a natural organic thinner derived from the extract of the quebracho tree (Schinopsis species, native to South America), used as a deflocculating additive in water-based drilling muds to… Read more →

Quicklook in petroleum engineering refers to a rapid, preliminary formation evaluation performed on wireline log data immediately after logging to identify potential hydrocarbon-bearing intervals, estimate porosity and… Read more →

A quitclaim is a legal instrument of conveyance by which an owner or claimant releases, or quits, whatever interest they may hold in a parcel, a mineral title, or a lease, without warranting that they actually own any… Read more →