cap rock


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Related to cap rock: reservoir rock, source rock

cap rock

[′kap ‚räk]
(geology)
An overlying, generally impervious layer or stratum of rock that overlies an oil- or gas-bearing rock.
Barren vein matter, or a pinch in a vein, supposed to overlie ore.
A hard layer of rock, usually sandstone, a short distance above a coal seam.
An impervious body of anhydrite and gypsum in a salt dome.
References in periodicals archive ?
There are countless, and even famous, examples of oil explorers and geologists finding all the right conditions for an oilfield only to discover, when the exploration well drill bit finally reaches the reservoir, that the oil was drained away due to a hole in the cap rock.
It is possible to shorten stemming heights for improved cap rock breakage.
As a consequence, cap rock integrity has become the new focus of concern in the oil sands.
AVO stands for "Amplitude Versus Offset" and exploits the angle of incidence dependent seismic wave behaviour at the interface of a cap rock and a potentially porous and hydrocarbon filled reservoir rock.
The lion was nestled near the top of a very short, mushroomed-out cedar resting right on the edge of the cap rock.
The Company intends on having the cores tested in laboratories to confirm the properties of the sands, oil and cap rock and to thus establish via the laboratory work.
Installing sheet piling would have been tedious and could incur thousands of dollars in damages trying to drive the sheeting into the cap rock of the Pasco (Florida) area," said Anthony Bosco, project manager for Haleakala Construction, the Better Roads subcontractor responsible for installing 7,600 linear feet of new storm sewer RCP just 25-feet away from one of the busiest sections of freeway in the state.
Shale gas is not just a game changer; it's a different game: In a conventional natural gas play, a well is drilled through an impermeable cap rock and into a source rock through which hydrocarbons can easily flow.
US Sharyland Utilities LP and its affiliate Hunt Transmission Services LLC, or HTS, said yesterday they had wrapped up the takeover of Cap Rock Energy Corporation and its NewCorp Resources Electric Cooperative subsidiary.
Field work will include detailed stream sediment sampling, prospecting, geological reconnaissance with emphasis on areas under any existing basaltic cap rock, grid establishment, magnetometer surveys, geochemical soil sampling and/or SGH (Soil Gas Hydrocarbon) soil sampling.
The corporate credit rating on SEMCO Energy is based on the consolidated credit profile of its indirect parent Continental Energy Systems (SEC), which in turn reflects the credit strengths and weaknesses of its various units including SEMCO Holding Corp, New Mexico Gas Intermediate Inc and Cap Rock Holding Corp.