US 11,725,154 B2
Hydrocarbon gas recovery methods
Darren Schmidt, Williston, ND (US)
Assigned to Energy and Environmental Research Center Foundation, Grand Forks, ND (US)
Filed by Energy and Environmental Research Center Foundation, Grand Forks, ND (US)
Filed on Jun. 8, 2022, as Appl. No. 17/806,004.
Application 17/806,004 is a continuation of application No. PCT/US2021/038335, filed on Jun. 22, 2021.
Claims priority of application No. 2009516 (GB), filed on Jun. 22, 2020.
Prior Publication US 2022/0298438 A1, Sep. 22, 2022
Int. Cl. C10G 5/06 (2006.01); C10G 70/04 (2006.01); C10L 3/10 (2006.01)
CPC C10G 70/043 (2013.01) [C10G 5/06 (2013.01); C10L 3/103 (2013.01); C10L 3/106 (2013.01); C10G 2300/1037 (2013.01); C10L 2290/06 (2013.01); C10L 2290/46 (2013.01); C10L 2290/48 (2013.01); C10L 2290/58 (2013.01); C10L 2290/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.