--> ABSTRACT: Differential Paleoflow and Diagenetic Scatter, by R. Ehrlich, K. O. Horkowitz, E. L. Etris, and C. A. McCreesh; #91038 (2010)

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Differential Paleoflow and Diagenetic Scatter

R. Ehrlich, K. O. Horkowitz, E. L. Etris, C. A. McCreesh

Differences in the state and extent of diagenesis can occur over distances of a fraction of a centimeter. Much of this diagenetic scatter arises from the fact that greatly different amounts of water may pass through various portions of an interconnected pore complex. Thus, holding other factors (temperature, mineralogy, etc) constant, documentation of diagenetic scatter can lead to inferences concerning aspects of paleohydrology. The degree of openness of a portion of a permeable medium to flow depends on permeability (and to some extent capillarity) at a hierarchy of scales from laminar to basinal. Diagenesis, in turn, changes the permeable medium and the nature of subsequent flow. That flow occurs at all, implies overpressures in some part of the system, and diagenetic catter can often be interpreted in that framework. Examples from several reservoir sandstones will be used to illustrate this concept.

AAPG Search and Discovery Article #91038©1987 AAPG Annual Convention, Los Angeles, California, June 7-10, 1987.