Cased-hole density offers new reservoir analysis alternative

A new cased-hole logging technique can be used for prospecting in old wells, monitoring reservoir dynamics, or as an alternative when open hole logging is impractical or uneconomical. The new technique being developed determines neutron and density porosities in cased wells with a through-tubing (15/8-in. diameter) pulsed-neutron system. 1-3 Neutron porosity measurements have been available for analyzing cased reservoirs for many years. This hydrogen-based porosity was valid in single-lithology

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