US 12,012,833 B2
Offshore oil and gas power generation with carbon capture and beneficial use of CO2
Martin B. Mick, Houston, TX (US); and Chirag Parmar, Houston, TX (US)
Assigned to Exmar Offshore Company, Houston, TX (US)
Filed by Exmar Offshore Company, Houston, TX (US)
Filed on Apr. 4, 2022, as Appl. No. 17/657,946.
Claims priority of provisional application 63/170,274, filed on Apr. 2, 2021.
Prior Publication US 2022/0316304 A1, Oct. 6, 2022
Int. Cl. E21B 43/16 (2006.01); E21B 41/00 (2006.01); E21B 43/01 (2006.01)
CPC E21B 43/164 (2013.01) [E21B 41/0064 (2013.01); E21B 43/01 (2013.01); E21B 41/0085 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A system for producing power and capturing carbon dioxide (CO2) at an offshore site, comprising:
an offshore vessel in fluid communication with a reservoir;
one or more separator units configured to separate a fluid produced from the reservoir into a water fraction, an oil fraction, and a gas fraction;
one or more oxy-firing gas turbine generator units, wherein an oxy-firing unit of the one or more oxy-firing gas turbine generator units is configured to receive as a fuel input the gas fraction separated by the one or more separator units;
one or more air separation units configured to separate an air into nitrogen and oxygen, wherein the oxy-firing unit is configured to receive the separated oxygen from the one or more air separation units;
one or more gas compression units configured to compress an exhaust gas to a pressure within a pressure range of 1,100 psi to 2,000 psi, wherein the exhaust gas comprises carbon dioxide and water, from the one or more oxy-firing gas turbine generator units to produce a compressed exhaust gas;
one or more dehydration units configured to dehydrate the compressed exhaust gas from the one or more gas compression units to produce a dehydrated compressed exhaust gas, wherein the oxy-firing unit is configured to receive a portion of the dehydrated compressed exhaust gas; and
one or more gas pumps configured to pump a remaining portion of the dehydrated compressed exhaust gas into the reservoir,
wherein the one or more oxy-firing gas turbine generator units is configured to generate electricity with the oxygen, the gas fraction, and the portion of the dehydrated compressed exhaust gas.