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Mature fields

Proactive Surveillance Enhances Reservoir Characterization in Mature ACG Field

This paper aims to showcase examples of how integrated analysis of surveillance data in the Azeri-Chirag-Gunashli field has improved reservoir understanding and informed reservoir-management decisions.

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September 1, 2026
Journal of Petroleum Technology
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Fig. 1—4D seismic images of the area at different times. Blue represents the hardening response, while red represents softening between two surveys.The bubble size and split represent allocation of production and injection.
Fig. 1—4D seismic images of the area at different times. Blue represents the hardening response, while red represents softening between two surveys.The bubble size and split represent allocation of production and injection.
Source: SPE 230423.

Effective management of mature fields relies on a deep understanding of their complex dynamics. This challenge is intensified by the heterogeneous nature of reservoirs under production and water and gas injection. Successful reservoir management comes from proactive and continuous integrated analysis of surveillance data and multidisciplinary collaboration. The complete paper showcases examples of how integrated analysis of surveillance data in the Azeri-Chirag-Gunashli (ACG) field has improved reservoir understanding and informed reservoir-management decisions.

ACG Field Surveillance

Proactive surveillance plays a critical role in effective reservoir management in mature oil and gas fields.

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