many potentially prolific producers have already been plugged and
abandoned , owing to lack of adequate formation evaluation . For
example , In the early days of log analysis، it was common practice
to regard water saturations above 50% as non-com
mercial.
However, with advances in logging and seismic technology came
the realization that some of those supposedly non-commercial zones
were، in fact، highly productive pays , depending on pore-size
distributionof the rock , movable or immovable fluids and
production probability .
