reservoir rock

noun Geology.
rock that has sufficient porosity to contain accumulations of oil or gas.

Origin:
1910–15

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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The reaction of these chemicals with petroleum acids in the reservoir rock results in the in situ formation of surfactants.
They need to know about the size and number of pores in a reservoir rock.
The use of polyacrylamides decreases the mobility of the injected fluid by decreasing the permeability of the reservoir rock.
The molecule is small enough to fit through the pores of a reservoir rock, but large enough to break loose an oil droplet.
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