This document is directed toward the determination of dissolved
and dispersed components in oilfield waters (produced water,
injected water, aqueous workover fluids, and stimulation fluids).
Bacterial analyses, bioassay (toxicity tests for marine animals),
NORM determination, and membrane filter procedures are outside the
scope of this document.
Biological determination of the species and concentration of
bacteria are covered in NACE TM0194-94, Field Monitoring of
Bacterial Growth in Oilfield Systems .
Determinations of Naturally Occurring Radioactive Materials
(NORM) in oilfield waters is discussed in API Bulletin E2,
Bulletin on Management of Naturally Occurring Radioactive
Materials (NORM) in Oil and Gas Production
Membrane filter procedures are covered in NACE TM01- 73,
Test Methods for Determining Water Quality for Subsurface
Injection Using Membrane Filters .
Analyses for residuals of proprietary organic treatment
chemicals, such as corrosion inhibitors, demulsifiers, scale
inhibitors, water clarifiers, biocides, etc. are also outside the
scope of this document. However, analyses for generic components of
proprietary chemicals, such as phosphate (scale inhibitor), are
included in this document.
Lastly, analyses of nonhazardous oilfield waste (NOW), such as
drilling fluid, soil, cores, etc. are outside the scope of this
document. However, analyses of separated water (including
filtrates) from such sources are within the scope.
The analytical methods presented in this document were selected
for their accuracy, reproducibility, and applicability to oilfield
systems. For most constituents, several methods of varying degrees
of complexity and accuracy are presented to provide the analyst
with the opportunity to choose the most appropriate and cost
effective method pertinent to his/her needs.
While the cited methods may also be used as indicators of
the environmental quality of oilfield waters, regulatory agencies
prescribe their own analytical methods that must be followed. These
regulatory agencies should be consulted to obtain the relevant
analytical procedures for cases in which data is to be used to
verify environmental compliance.
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