Kitty L. Milliken1
(1) University of Texas, Austin, TX
Abstract: Diagenetic heterogeneity in a sandstone bed
, Breathitt
Formation, eastern Kentucky
Twenty seven samples of
feldspathic phyllarenite were obtained from three one-meter grids in a
homogeneous-looking distributary bar sandstone unit with the goal of
documenting bed
-scale diagenetic heterogeneity. Significant variability in the
content of both detrital and diagenetic components is observed among the
samples. Grain size is one important local control on the overall abundances of
cement and porosity. Grain size operates to control the overall degree of
cementation, in these particular rocks, indirectly, through its influence on
the content of ductile lithic grains and, hence, on compaction. Diagenetic
heterogeneity of this type is a formidable obstacle for application of
predictive models of siliciclastic diagenesis at the reservoir scale and
confirms the importance of textural considerations to the success of such
models.
AAPG Search and Discovery Article #90914©2000 AAPG Annual Convention, New Orleans, Louisiana