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Geochemistry of Some Petroleum-Associated Waters from Louisiana.


PB189538

Publication Date 1970
Personal Author Collins, A. G.
Page Count 36
Abstract Some of the geochemical relationships that exist between subsurface fluids and the associated geologic strata in petroleum producing areas of Louisiana have been determined. Samples of petroleum-associated water were obtained from 126 wells in Louisiana that produced from sediments of three geologic ages: Tertiary, Cretaceous, and Jurassic. The samples were transported to a central laboratory for analysis of chemical composition, using standard methods, to determine if the compositions varied with the geologic strata of their source and, if so, why. The dissolved constituents were compared with those of a brine that was concentrated by evaporation. The concentrations of bromide, calcium, and strontium were useful in distinguishing the brines produced from sediments of a late age from those of an earlier age. The concentration ratios of Mg' (total equivalent magnesium) and bromide indicated that dolomitization probably had occurred and altered the composition of the brines. A principal-components analysis of the data indicated an inverse relationship between depth and concentrations of bromide, strontium, calcium, and lithium. (Author)
Keywords
  • Geochemistry
  • Water
  • Petroleum
  • Evaporation
  • Louisiana
  • Halides
  • Geologic age determination
  • Alkali metals
  • Strontium
NTIS Subject Category
  • 48F - Geology & Geophysics
Corporate Authors BUREAU OF Mines, Washington, D.C.
Document Type Technical Report
Title Note Report of Investigations.
NTIS Issue Number 197008
Geochemistry of Some Petroleum-Associated Waters from Louisiana.
Geochemistry of Some Petroleum-Associated Waters from Louisiana.
PB189538

  • Geochemistry
  • Water
  • Petroleum
  • Evaporation
  • Louisiana
  • Halides
  • Geologic age determination
  • Alkali metals
  • Strontium
  • 48F - Geology & Geophysics
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