Maximizing the Value of Data Acquisition: Gas Pressure Assessment Through Casing - A Complex Cased Hole Pulse Neutron Case Study From the Netherlands

Cavalleri, Chiara; Schlumberger,; Brouwer, Gerrit; Kodri, Dimas; Rose, David; Brinks, an-Bart Theodoor; Maatschappij, Nederlandse Aardolie

doi:10.30632/spwla-5062

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“…In mature multilayer gas reservoirs, it is a common problem how to evaluate whether the undeveloped potential gas layers determined by open-hole logging still have production value after casing [1]. Intervention in unperforated zones with high gas density can increase gas production, whereas intervention in zones with low gas density is uneconomical [2]. Pulsed neutron logging technology has been widely used in the monitoring of reservoir parameters in cased wells [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Study on Monitoring Reservoir Gas Density by Pulsed Neutron Logging

Chen

Dang

Cai

et al. 2023

International Journal of Energy Research

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In mature multilayer gas reservoirs, it is a common problem to evaluate whether a potential reservoir is still productive after casing. Monitoring of unproduced or developing gas formations can guide production action plans. Intervention in unperforated zones with high gas density can increase gas production, whereas intervention in zones with low gas density is uneconomical. An RPM instrument stratum model was established by using the Monte Carlo method in this study. The model was used to simulate the response characteristics of pulsed neutron logging in a sandstone reservoir with 100% gas saturation to different reservoir gas densities, formation porosity, and shale content. The data obtained from the simulation were interpolated to construct a capture gamma ratio plate and a nonbounce gamma ratio plate. Using the constructed chart, the gas density of the reservoir can be quantitatively calculated, and then, the recovery value of the potential gas layer can be evaluated.

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Section: Introductionmentioning

confidence: 99%