Chapter 1: Formation Evaluation Overview
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Published:2012
"Formation Evaluation Overview", Openhole Log Analysis and Formation Evaluation, Richard M. Bateman
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Formation evaluation covers a very wide range of measurement and analytic techniques. The purpose of this work is to expose the reader to all the available methods and to provide a perspective with reference to borehole geophysics or well logs. Although the emphasis will be on well logging techniques and log analysis methods, these are not the only tools available to the formation evaluator. Well logs are central only in the sense that they are universally recorded in practically all wellbores and can be directly related to all the other parameters available from the associated sciences. For example, a geophysicist needs borehole measurements to determine a time-depth relationship, and a petrophysicist needs a core analysis to determine log response properly, but a thin section or a scanning electron microscope (SEM) photograph of a rock sample is of no direct help in the interpretation of a seismic section, nor is a vertical seismic profile (VSP) of any help in determining relative permeability. However, all these measurements are pertinent to the overall task of defining a reservoir’s limits, storage capacity, hydrocarbon content, produceability, and economic value.
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