Oil and Gas Terms Beginning with “C” — Page 10

What Is Compartmentalization? Compartmentalization (also called reservoir compartmentalization or pressure compartmentalization) is the division of a petroleum reservoir into two or more isolated or semi-isolated… Read more →

Compatibility in matrix stimulation operations is a key characteristic of formation rock that indicates whether formation permeability is preserved (or improved) when treatment fluids and their additives contact the… Read more →

Compatible scales, in petroleum reservoir engineering and petrophysics, refers to the concept and practice of ensuring that measurements made at different spatial scales — from core plug measurements (centimeter to… Read more →

What Is the Compensated Neutron Log? The compensated neutron log (CNL) is a borehole nuclear logging tool that measures the concentration of hydrogen in the formation by bombarding it with fast neutrons from an… Read more →

What Is a Compensated Density Log? Compensated density log (also called the CDL, FDC, or formation density compensated log) is a nuclear wireline logging measurement that determines formation bulk density by bombarding… Read more →

What Is Competent Rock? Competent rock (also called a competent formation) is a geological formation that is mechanically strong, self-supporting, and resistant to deformation, collapse, or plastic flow under the stress… Read more →

What Is Completing a Well? Completing a well (also called well completion or completion operations ) is the series of mechanical and stimulation operations performed after a well has been drilled to its target depth to… Read more →

What Is a Completion in Oil and Gas? A completion in oil and gas is the set of operations carried out after a well has been drilled to prepare it for production or injection. It encompasses perforating the casing to… Read more →

What Is a Completion Fluid? A completion fluid is a solids-free, clear brine solution pumped into the wellbore during completion and workover operations to control hydrostatic wellbore pressure against formation pore… Read more →

What Is Completion Skin? Completion skin (also called mechanical skin or geometric skin ) is a dimensionless pressure-drop factor included in the skin term S of the well productivity equation that quantifies the… Read more →

What Is Complex Trace Analysis? Complex trace analysis (also called instantaneous attribute analysis or analytic signal decomposition ) is a mathematical technique applied to individual seismic traces that transforms… Read more →

What Is a Composite Log? Composite log (also called a mud log , wellsite log , or drilling log ) is a continuous graphical record created at the wellsite throughout drilling that combines on a single log-format strip… Read more →

A composite stream in oil and gas production and processing is the combined fluid stream produced by commingling the output of two or more individual wells or production facilities at a common gathering point before… Read more →

What Is Compositional Fluid Analysis? Compositional fluid analysis (also called PVT analysis or fluid characterization) is the laboratory measurement and equation-of-state (EOS) modeling of a reservoir fluid sample to… Read more →

(noun) A measure of the relative volume change of a fluid or porous medium in response to a change in pressure, expressed as the fractional change in volume per unit change in pressure. In reservoir engineering,… Read more →

What Is Compression Ratio? Compression ratio (also called pressure ratio) is the ratio of the absolute discharge pressure to the absolute suction pressure of a single compressor stage, expressed as Rd = Pd / Ps using… Read more →

What Is a Compression-Set Packer? Compression-set packer (also called a weight-set packer or mechanically set packer) is a downhole sealing device that is activated by applying compressive axial load from the drill… Read more →

What Is a Compressor? Compressor (also called a gas compressor or natural gas compressor) is a mechanical device that increases the pressure of a gas stream by reducing its volume, enabling the transport, processing,… Read more →

What Is a Compressor Plant? Compressor plant (also called a gas compression station or compressor station) is a surface facility containing one or more gas compressors, prime movers, coolers, scrubbers, and associated… Read more →

What Is Computed Tomography in Petroleum Geoscience? Computed tomography (also called CT scanning, X-ray CT, or industrial CT) is a non-destructive imaging technique that uses a rotating X-ray source and detector array… Read more →

Concentric in oilfield engineering refers to two or more cylindrical objects sharing the same central axis, with the most common applications in Western Canada Sedimentary Basin well design being concentric casing… Read more →

What Is a Concentric Fold? Concentric fold (also called a parallel fold) is a type of geological fold in which each rock layer maintains a constant orthogonal thickness throughout the fold geometry, so that layer… Read more →

What Is a Conceptual Reservoir Model? Conceptual reservoir model (also called a geological conceptual model or reservoir concept) is a simplified, qualitative or semi-quantitative representation of the key geological,… Read more →

What Is a Concession? Concession (also called a license, lease, or petroleum agreement) is a contractual arrangement granting a company the exclusive right to explore for and produce hydrocarbons within a defined… Read more →

What Is Condensate? Condensate (also called gas condensate, natural gas liquids condensate, or lease condensate) is a light liquid hydrocarbon mixture that exists as a gas in the reservoir at high pressure and… Read more →

What Are Condensate Liquids? Condensate liquids (also called natural gas liquids, NGLs, or plant condensate) are the heavier hydrocarbon components — ethane, propane, butanes, pentanes, and heavier fractions — that… Read more →

What Is a Condensate-Gas Ratio? Condensate-gas ratio (also called CGR, gas-condensate ratio, or condensate yield) is the volume of liquid condensate produced per unit volume of gas, expressed in barrels per million… Read more →

What Is a Condensed Section? Condensed section (also called a maximum flooding surface interval or pelagic condensed interval) is a very thin but time-rich sedimentary interval deposited during maximum marine flooding,… Read more →

What Is a Condensing Drive? Condensing drive (also called enriched gas injection or condensing-gas drive) is an enhanced oil recovery mechanism in which an enriched injection gas, typically CO2-rich or LPG-enriched with… Read more →

What Is Conditional Simulation? Conditional simulation (also called stochastic simulation or geostatistical simulation) is a numerical modeling technique that generates multiple equally probable three-dimensional… Read more →