ABSTRACT
A new method of detecting invasion (permeability) in low porosity and deep invasion formations is presented. The method is particularly applicable to West Texas type rocks, in which the permeability is primarily due to fracture or large vugs. The system requires the use of salt base or boron treated mud, and a computer plot of the porosity logs and the Neutron Lifetime Log. The system can be run in open or cased holes immediately after the drilling of the well.
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1971. Society of Petrophysicists & Well Log Analysts
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