Determination Of immovable And Movable Water Saturation Using Geophysical Well Logging

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-commercial. 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 .