Inhibiting reservoir souring using a treated injection water

Wells – Processes – Cleaning or unloading well

Reexamination Certificate

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C166S246000, C166S268000, C166S300000, C166S304000

Reexamination Certificate

active

07464760

ABSTRACT:
A process for inhibiting souring in a hydrocarbon reservoir provides a feed water including a plurality of phosphorous constituents and having an elevated phosphorous concentration. At least some of the phosphorous constituents are removed from the feed water to produce a treated injection water, which has a reduced phosphorous concentration less than the elevated phosphorous concentration. The treated injection water is injected into the reservoir via a first well and the hydrocarbon is produced from the reservoir via a second well. The process inhibits souring in the reservoir insofar as the treated injection water results in a lower level of souring in the reservoir over time than if the feed water had been injected into the reservoir.

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