"Introduction", Waterflooding: Chemistry, Dave Chappell
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It is becoming increasingly recognized that chemistry issues can have a significant impact on the way a waterflood project progresses. This topic is therefore the first to be covered in a series of books addressing various factors associated with waterflooding. These issues might primarily affect the operating costs associated with a project, but they can also impact recovery. For example, in fields where reservoir souring has occurred, there can be constraints related to the hydrogen sulfide (H2S) content of gas export volumes. In extreme cases, these constraints could require wells producing high volumes of H2S to be shut in, and production will, at best, be deferred, but there might also be a negative impact on ultimate recovery. Similarly, high-H2S-producing wells might need to be shut in because of well-integrity concerns associated with the corrosion impacts on well materials. In such cases, it is highly likely that stranded oil volumes cannot then be produced because the remaining volumes do not facilitate economic repairs, so this factor suggests a very high likelihood of an overall recovery impact.
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