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hydraulic fracturing

Definition Oil shale refers to solid hydrocarbon (kerogen) rock resulting from a decomposed organic matter still at solid state, in a sedimentary rock unit. The oil shale may also be called black shale. Oil shale and shale oil must not be confused as they do not mean the same thing since shale oil designates tight oil or tight shale […]

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Definition Tight oil refers to the light crude oil trapped in shale, limestone and sandstone formations characterized by very low porosity and permeability. Tight oil is normally a light crude oil found in the sedimentary formations that may also be called light tight oil (LTO) or tight shale oil or even shale oil. Comments But […]

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Definition Tight gas is the name given to the unconventional natural gas because it is trapped in a very tight  underground hard rock, or sandstone or limestone formation that is unusually impermeable and non-porous called tight sand. Comments In a conventional natural gas deposit, once drilled, the gas can usually be extracted quite readily, and easily. A […]

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