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This is a Observational study (also classified as: Case Report).

August 16, 2025

Pulsed Neutron Application in Monitoring Formation Gas Movement and Reservoir Depletion Surveillance in a Mature Niger Delta Field

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Observational analysis uncovered gas saturation changes in mature Niger Delta reservoirs, indicating advanced monitoring needs.

Gas saturation levels varied notably within the reservoirs due to non-uniform depletion patterns, reflecting complex geology.
Detailed monitoring utilized pulsed neutron logging and advanced gamma-ray measurements to enhance fluid identification.
Monte Carlo N-Particle models were critical in deriving accurate gas saturation and depletion predictions in the reservoirs.
Longitudinal logging showed significant changes in the gas cap movement, influenced by aquifer pressure and production effects.

Mobo et al. (2025) studied this question.

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