Hydrocarbon gas recovery methods
AssigneeEnergy & Environmental Research Center Foundation
InventorDarren Schmidt
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Abstract
A method of recovery of rich gas where the rich gas is a hydrocarbon gas comprising less than 50 mole % methane is disclosed. The method comprises the steps of gathering the low pressure gas, compressing the gathered gas, cooling the compressed gas in a condenser so that a portion of the compressed gas condenses to form a liquefied gas and liquefied gas vapour in the condenser, and discharging the liquefied gas and liquefied gas vapour from the condenser, in which the cooling of the compressed gas is performed using at least one heat exchanger (40).
Claims20
A method of recovery of rich gas, the method comprising:
- flowing crude oil to a 2-phase separator to form a sales gas stream and a liquid hydrocarbon stream;
- flowing the liquid hydrocarbon stream to a heater treater to form a first rich gas composition comprising less than 50 mol % methane and an oil stream;
- flowing the oil stream to an oil storage tank, the oil storage tank comprising a second rich gas composition in a headspace thereof comprising less than 50 mol % methane;
- compressing the first rich gas composition and the second rich gas composition;
- cooling the compressed first rich gas composition and the compressed second rich gas composition in one or more condensers so that a portion thereof condenses to form a liquefied gas and liquefied gas vapor in the condenser;
- and
- discharging the liquefied gas and liquefied gas vapor from the condenser.
Dependencies are inferred from the claim text.