IPM Tool for Strategic Decisions: Diverse Applications of IPM in the Supergiant Tengiz Field

Kabdenov, Samat; Aitkazin, Mirkhat; Macary, Sameh; Aitzhanov, Abzal

doi:10.2523/17252-ms

International Petroleum Technology Conference 2014

DOI: 10.2523/17252-ms

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IPM Tool for Strategic Decisions: Diverse Applications of IPM in the Supergiant Tengiz Field

Samat Kabdenov¹,

Mirkhat Aitkazin²,

Sameh Macary³

et al.

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Best Practices in Calibration of Integrated Production Modeling for Tengiz Field

Onbergenov¹,

Aitkazin²,

Tang³

et al. 2017

Day 2 Thu, November 02, 2017

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Petroleum Experts Integrated Production Modeling (IPM) toolkit is widely used in Tengizchevroil (TCO) for short and long term production forecasting in the Tengiz field. The short and long term models each have their own strategic focus. The short term IPM model is used for day-to-day management of field activities to ensure business plan production volumes are delivered. The long term IPM model is used to manage base business and optimize scenarios for various future development projects. The short term IPM model is validated and history matched continuously and forms the basis of the long term model to meet business objectives. Because of the complexity of the Tengiz gathering system, close collaboration among multiple teams, systematic updates and continuous improvement of the model is required. It is also important to have an accurate temperature prediction across the entire field network to conduct flow assurance studies, optimize plant inlet temperatures and maximize plant throughput. As a result of the implemented calibration efforts, the model predicts field production rates within 1% of the actual field performance. The model provides more granularity and higher confidence in ensuring that the plant can produce at its maximum capacity when wells are shut-in for surveillance activities, pipeline repairs and meter station (MS) shutdowns for gathering line repairs. In a long term perspective, it's crucial to have an accurate model to plan MS shutdowns for upgrades and the successful startup of major capital projects. This paper describes model improvement initiatives, the best practices and lessons learned during the calibration process of the complex IPM model. A structured workflow for the calibration of the IPM model is also provided. The calibration steps are described in detail with relevant examples throughout the paper. This workflow can be used by IPM practitioners in other fields to construct and maintain integrated production system models.

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Best Practices in Calibration of Integrated Production Modeling for Tengiz Field

Onbergenov¹,

Aitkazin²,

Tang³

et al. 2017

Day 2 Thu, November 02, 2017

View full text Add to dashboard Cite

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Best Practices in Calibration of Integrated Production Modeling for Tengiz Field (Russian)

Onbergenov¹,

Aitkazin²,

Tang³

et al. 2017

SPE Annual Caspian Technical Conference and Exhibition

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Application and Challenges of Coupled Model with Complex Surface Network Connected to Multiple Reservoirs

Kurimov¹,

Lim²,

Urazmukhambetov³

et al. 2017

Day 2 Thu, November 02, 2017

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Due to its complex nature, long term development scenarios have been modeled using a subsurface reservoir centric model, with representative surface constraints such as well head pressure. Near term operating plans, on the other hand, have been based on a detailed surface network model that included a comprehensive representation of plant, flowlines and operating conditions. Each of these models have been calibrated and their accuracy were verified independently. We have recently implemented a fully coupled reservoir-surface network model consisting of complex surface network, including three processing plants, and two subsurface reservoir models. The model is run using a controller which manages the surface network model running on a PC and the reservoir model running on a Linux cluster. The coupling modeling approach in long term forecasting becomes essential when the field deliverability is impacted by the dynamic conditions in the surface facilities. The coupled model provides critical insights when major changes are introduced throughout field life, such as major surface facility expansion, surface network depressurizing, differing regional depletion rate in the reservoirs. This paper presents the advantages and challenges of applying the coupled model in a complex surface gathering system network being fed by several subsurface reservoirs with different pressures. The model provided insight on the detailed and complex interaction between the subsurface reservoir and the surface network, which cannot be achieved using either standalone model (surface or subsurface). The information enabled us to identify opportunities for debottlenecking and optimizing production through management of back pressure in the system.

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IPM Tool for Strategic Decisions: Diverse Applications of IPM in the Supergiant Tengiz Field

Cited by 5 publications

References 0 publications

Best Practices in Calibration of Integrated Production Modeling for Tengiz Field

Best Practices in Calibration of Integrated Production Modeling for Tengiz Field

Best Practices in Calibration of Integrated Production Modeling for Tengiz Field (Russian)

Application and Challenges of Coupled Model with Complex Surface Network Connected to Multiple Reservoirs

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