US 12,006,481 B1
Methods of water separation from crude oil
Mohamed Ahmed Soliman, Ras Tanura (SA); Azeb M. Qahtani, Dhahran (SA); Simone Less, Dhahran (SA); and Ramsey White, Abqaiq (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Nov. 30, 2022, as Appl. No. 18/060,113.
Int. Cl. C10G 53/02 (2006.01)
CPC C10G 53/02 (2013.01) [C10G 2300/1033 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4012 (2013.01); C10G 2300/4081 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method comprising:
producing a crude oil from a reservoir;
before the crude oil passes through a production choke valve, contacting the crude oil with a demulsifying agent to form a mixture of crude oil and demulsifying agent;
wherein the mixture of crude oil and demulsifying agent is at a pressure of about 400 psig to about 500 psig before the choke valve;
separating the mixture of crude oil and demulsifying agent in a high-pressure vessel into a gas stream, an oil stream, and a water stream; and
combining the gas stream and oil stream to form an oil and gas mixture.