Study on Monitoring Reservoir Gas Density by Pulsed Neutron Logging

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 p...

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Bibliographic Details
Published in:International journal of energy research 2023-02, Vol.2023, p.1-8
Main Authors: Chen, Guangyao, Dang, Lixia, Cai, Wenyuan, Li, Jian, Dong, Junjie, Chen, Zhanglong, Deng, Rui
Format: Article
Language:English
Subjects:
Density
Energy
Gamma rays
Gas density
Gas production
Hydrogen
Logging
Monitoring
Monte Carlo simulation
Multilayers
Neutrons
Oil and gas production
Porosity
Reservoirs
Sandstone
Saturation
Sedimentary rocks
Shale
Shale gas
Statistical methods
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Summary: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.
ISSN:0363-907X
1099-114X
DOI:10.1155/2023/1363145