Patent ID: 11920453
Assignee: BP EXPLORATION OPERATING COMPANY LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E  G | IPC E  G

Claim 1:
2. The method of claim 1, wherein an amount of PW and the blended injection fluid dynamically injected into the reservoir is divided among one or more of:
(a) an amount of PW blended with a stream of the low salinity or softened water to provide a low salinity or softened water EOR stream having a salinity less than a target salinity for EOR and introduced as a slug of low salinity or softened water EOR into one or more segments of the reservoir allocated for secondary or tertiary low salinity or softened water EOR;
(b) an amount of PW utilized as a drive and/or pre-flush fluid that is injected into one or more segments of the reservoir allocated for low salinity or softened water EOR subsequent and/or prior to, respectively, the injection of a slug of low salinity or softened water EOR thereto;
(c) an amount of PW utilized in secondary recovery mode via injection into one or more segments of the reservoir allocated for tertiary low salinity or softened water EOR prior to injection of a slug of low salinity or softened water EOR thereto in tertiary recovery mode;
(d) an amount of PW injected via a disposal stream into one or more segments of the reservoir allocated for PW disposal;
(e) an amount of PW blended with a stream of the low salinity or softened water to provide a low salinity or softened water EOR stream having a salinity less than a threshold salinity for EOR, and introduced as a slug of low salinity or softened water EOR into one or more segments of the reservoir allocated for secondary or tertiary low salinity or softened water EOR; and
(f) an amount of PW blended with a stream of the low salinity or softened water to provide a low salinity or softened water EOR stream having a salinity above the threshold salinity for EOR, and introduced into one or more segments of the reservoir;
wherein the amounts of PW allocated to each of (a), (b), (c), (d), (e), and (f) are maintained below injection limits for the associated one or more segments thereof.