Glossary

This glossary more specifically relates to oil and gas exploration and production terms.

Helium:: Elementary gas (chemical symbol He) consisting of two electrons revolving about a nucleus comprising two protons and two neutrons.
Horizontal drilling:: Extreme form of directional drilling, in which the hole is drilled along a horizontal stratum.
Hydraulic fracturing:: technique for creating fractures in a rock through the injection of very high-pressure water.
Hydrocarbon:: Chemical compound formed only of carbon and hydrogen.
Hydrogen:: Simple substance (H), generally found in the gaseous state. It is the lightest of all gases. Combined with oxygen, it makes water; and with carbons, it makes hydrocarbons.
Hydrophone:: Acoustical sensor used for collecting reflected waves in seismic exploration at sea.