Shaly Sand Analysis Case Studies
Five different case studies help us resolve the quation posed earlier in the text, namely, if shale or clay is present in a reservoir, how do we correct log data to find tire critical parameters of effective water saturation and effective porosity?
The case studies come from the San Juan basin, New Mexico; Midland basin, Texas; Anadarko basin, Oklahonra, western Kansas; and the Gulf of Mexico, and represent Mississippian, Fennsylvanian, Fermian, Cretaceous and Tertiary ages.
In all of the cases, we base our assessment strategies on an unknown shale or clay distilbution. Every example begins with a conventional, uncorrected log analysis; this provides some startling comparisons of different reservoir parameters, and vividly illustrates how easy it is to make costly mistakes if the time isn't taken to do shaly sand analysis in a reservoir.
Figures & Tables
The intent of this publication is to provide the reader with a simplified review of shaly sand well log analysis. Because of the important effects that shale or clay have on both reservoir quality and well log response, a working knowledge of the subject provides a necessary basis for accurate log analysis. Techniques illustrated in the text will assist in making better decisions about the productive potential of shaly reservoirs and in mapping shaly sandstones. This book is intended as a quick look, ready reference guide.