Converting a drilled well to a condition that can be left indefinitely without further attention and will not damage freshwater supplies, potential petroleum reservoirs or the environment.

Measure of solvency of hydrocarbon solvents.

Energy, such as solar, wind, or nuclear energy, that can replace or supplement traditional fossil fuel sources, such as coal, oil, and natural gas.

A well drilled in order to evaluate the characteristics of a field.

Natural gas associated with oil accumulations, either dissolved in oil or found as a cap of free gas above oil in reservoir.

Waste gases, vapours and small particles released into air.

Magnetometers, towed by aircraft, help to detect magnetic anomalies or to distinguish geologic features that might appear similar from seismic data alone.

Air gun array is most common technique used for seismic surveying offshore. Compressed air is released from a chamber to produce shock waves in earth.

Drilling to determine physical extent, reserves and likely production rate of a reservoir, together with properties of oil or gas

Costs incurred in survey, exploitation and appraisal of licence areas not yet under development or in production.

An enhanced recovery technique in which air is injected into hydrocarbon formation to increase reservoir pressure.

Any techniques, other than natural drives, for bringing oil to surface.