CPC C10G 7/02 (2013.01) [B01D 17/0214 (2013.01); B01D 17/06 (2013.01); B01D 19/0005 (2013.01); B01D 19/0068 (2013.01); C10G 7/04 (2013.01); C10G 31/06 (2013.01); C10G 2300/1033 (2013.01); C10G 2300/208 (2013.01); C10G 2300/4012 (2013.01)] | 18 Claims |
1. An integrated gas oil separation method, the method comprising the steps of:
separating crude oil in a high pressure separator into a high pressure crude oil off-gas and a high pressure partially degassed crude oil output, where the high pressure crude oil off-gas is in a pressure range from about 135 psig to about 500 psig;
compressing the high pressure crude oil off-gas in a high pressure compressor;
introducing the high pressure partially degassed crude oil output to a low pressure separator;
separating the high pressure partially degassed crude oil in the low pressure separator into a low pressure crude oil off-gas and a low pressure partially degassed crude oil output, where the low pressure crude oil off-gas is in a pressure range from about 35 psig to about 180 psig;
compressing the low pressure crude oil off-gas to produce a compressed low pressure crude oil off-gas;
separating the low pressure partially degassed crude oil output in an atmospheric separator into an atmospheric crude oil off-gas and an atmospheric partially degassed crude oil output, where the atmospheric crude oil off-gas is in the range of about 3 psig to about 80 psig;
compressing the atmospheric crude oil off-gas to produce a compressed atmospheric crude oil off-gas;
injecting the compressed atmospheric crude oil off-gas directly into the crude oil before the low pressure separator;
desalting the atmospheric partially degassed crude oil output in a desalting vessel generating a desalted partially degassed crude oil output;
stabilizing the desalted partially degassed crude oil output in a crude stabilizer column to produce a crude oil product and a crude stabilizer column recycle stream comprising crude oil;
applying the compressed low pressure crude oil off-gas for indirect heating of the crude oil in the crude stabilizer column recycle stream through a first reboiler; and
applying the high pressure crude oil off-gas for indirect heating of the crude oil in the crude stabilizer column recycle stream through a second reboiler.
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