Chemical Properties of Subsurface Brines
In this section we will review basic chemical properties of subsurface brines. We will be particularly interested in what these properties tell us about the origin of these waters. Spatial variations in salinity and chemical composition, for example, provide clues to pathways of fluid migration. Knowledge of chemical interactions between rocks and brines helps delineate processes which which alter sediment porosity and permeability. Chemical analyses of fluids in producing oil and gas fields assist in the assessment of reservoir continuity and provide information necessary in dealing with problems of borehole or wastewater treatment.
Figures & Tables
The topics covered in these notes have been selected to provide the general sedimentary geologist with an introduction to some of the key problems and a conversational familiarity with some of the basic techniques in this important area of sedimentary geology. A number of field examples are drawn from the Louisiana Gulf Coast, buy many of the general principles will be applicable to other areas and problems.