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

Claim 0:
1. A method of dynamically allocating a total amount of Produced Water (PW) from a reservoir during enhanced oil recovery (EOR) via a low salinity or softened water EOR flood, the method comprising:
receiving measurement data associated with a reservoir, a PW, and a low salinity or softened water, wherein the measurement data comprises: a PW production rate from the reservoir, a low salinity or softened water injection rate, an injection water compositional envelope, and a total water injection rate;
receiving reservoir configuration information comprising: one or more EOR injection zones, an EOR injection rate associated with each of the one or more EOR injection zones, one or more disposal injection zones, a disposal zone injection rate associated with each of the one or more disposal injection zones, one or more non-reinjection disposal routes, and a non-reinjection disposal rate associated with each of the one or more non-reinjection disposal routes;
determining a blending rate comprising at least a portion of the PW production rate and at least a portion of the low salinity or softened water injection rate to provide a blended injection fluid, wherein the blending rate maintains a composition of the blended injection fluid within the injection water compositional envelope; blending at least a portion of the PW with at least a portion of the low salinity or softened water at the blending rate to produce a blended injection fluid; and
dynamically injecting a first portion of the PW and the blended injection fluid into the one or more EOR injection zones, into the one or more disposal injection zones, or a combination thereof;
dynamically disposing a second portion of the PW and the blended injection fluid through one or more non-reinjection disposal routes;
wherein the dynamic injection and dynamic disposal maintains the EOR injection rate, the disposal zone injection rate, and the non-reinjection disposal rate below predetermined thresholds, results in reinjection or non-reinjection disposal of the entire PW production rate, and meets a total voidage replacement rate whereby the sum total of the amount of water reinjected in (a) equals a voidage requirement.