The writer discusses the evidence pertaining to the theories of sulphate reduction in oil-well waters. First, the theory that sulphates are reduced by inanimate organic matter is reviewed in the light of field and laboratory evidence. Studies of the earth’s sediments do not indicate that the temperatures have been sufficiently high to bring about the reaction. Second, the biologic concept of sulphate reduction is reviewed in the light of recent field and laboratory investigations. The latter theory is supported by considerable fact evidence. There is some discussion pertaining to ecologie questions in relation to the life processes of sulphate-reducing micro-organisms. The significance of this biologic method of sulphate reduction has not been established. Part of the literature is cited.
Figures & Tables
The AAPG volumes of Structure of Typical American Oil Fields preceed this book, which was written as a sequel to those, and at first conceived as a third volume of the earlier work. This book is designed to review, modify and, if possible, clarify ideas with regard to the fundamental concepts of oil geology, utilizing, for this purpose, the material presented in the two earlier data-based volumes. To conform to the original standard set for it, this book has been kept relatively free from factual data and has been compiled rather as a summation, based upon the best available evidence, of present knowledge of the science. This volume does not include a discussion of the technique of field or laboratory geology, but does include papers divided into 7 parts: History; Origin and evolution of petroleum; Migration and accumulation of petroleum; Relations of petroleum accumulation to structure; Porosity, permeability, compaction; Oil-field waters; and Subsurface temperature gradients.