‘‘Proved undeveloped reserves’’ . . . . . .
Proved undeveloped reserves are those proved reserves that
are expected to be recovered from future wells and facilities,
including future improved recovery projects which are
anticipated with a high degree of certainty in reservoirs which
have previously shown favorable response to improved
recovery projects.
‘‘Reconnaissance contract’’ . . . . . . . . .
A contract in which the owner of hydrocarbons gives an E&P
company rights to perform evaluation of existing data or
potentially acquire additional data but does not convey an
exclusive option to explore for, develop, and/or produce
hydrocarbons from the lease area.
‘‘Shelf margin’’ . . . . . . . . . . . . . . . . .
The path created by the change in direction of the shoreline
in reaction to the filling of a sedimentary basin.
‘‘Structural trap’’ . . . . . . . . . . . . . . . .
A structural strap is a topographic feature in the earth’s
subsurface that forms a high point in the rock strata. This
facilitates the accumulation of oil and gas in the strata.
‘‘Structural-stratigraphic trap’’ . . . . . . .
A structural-stratigraphic trap is a combination trap with
structural and stratigraphic features.
‘‘Stratigraphy’’ . . . . . . . . . . . . . . . . . .
The study of the composition, relative ages and distribution of
layers of sedimentary rock.
‘‘Stratigraphic trap’’ . . . . . . . . . . . . . .
A stratigraphic trap is formed from a change in the character
of the rock rather than faulting or folding of the rock and oil
is held in place by changes in the porosity and permeability of
overlying rocks.
‘‘Submarine fan’’ . . . . . . . . . . . . . . . .
A fan-shaped deposit of sediments occurring in a deep water
setting where sediments have been transported via mass flow,
gravity induced, processes from the shallow to deep water.
These systems commonly develop at the bottom of
sedimentary basins or at the end of large rivers.
‘‘Three-way fault trap’’ . . . . . . . . . . . .
A structural trap where at least one of the components of
closure is formed by offset of rock layers across a fault.
‘‘Trap’’ . . . . . . . . . . . . . . . . . . . . . . .
A configuration of rocks suitable for containing hydrocarbons
and sealed by a relatively impermeable formation through
which hydrocarbons will not migrate.
‘‘Undeveloped acreage’’ . . . . . . . . . . . .
Lease acreage on which wells have not been drilled or
completed to a point that would permit the production of
commercial quantities of natural gas and oil regardless of
whether such acreage contains discovered resources.
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