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Abstract

Summary

The material balance study was conducted using an application of Petroleum Experts MBAL software and determined that significant volumes of CO2-rich gas were cross-flowing between reservoirs Pz+Bd+Sm-1 and Pz+Bd-2 trough R2 fault that was activated with a start of production and pressure depletion. The magnitude of the cross-flow volumes significantly impacted well and reservoir performance and modelling. Quantification of CO2 gas volumes in production is crucial for future field redevelopment.

The novelty of the use of MBAL multi-tank model in this scenario is in the ability to history match the model in reasonable time. This is achieved while effectively managing reservoir uncertainties. This is critical for key business decisions, business planning, general reservoir management and production. This has provided high confidence in the model’s robustness, and validates the adopted methodology, which has broader applications to enable material balance modelling of reservoir cross-flow. The purpose of this article is to present the methods and practices and to show how they can be applied to other fields/reservoirs.

At the initial conditions, based on gas composition analysis from wells S-1,2,4 and 5, it can be concluded that the Pz+Bd+Sm-1 reservoir samples are characterized by the dominance of methane (73–78%) and a high concentration of non-hydrocarbon gases, carbon dioxide (9–13%) and nitrogen (11–14%). In contrast to Pz+Bd+Sm-1, a gas from reservoir Pz+Bd-2 is dominantly composed from carbon dioxide (80%).

To achieve the objective of the CO2 cross-flow evaluation via multi tank MBAL model, two-tank models were built based on the understanding from the geology and their connectivity to each other were achieved using transmissibility. The aquifer was modelled using a central water tank from which the other tanks were supplied and transmissibility was used to connect the other tanks. Measured reservoir pressures were compared with the MBAL simulated pressure to see how good the model could replicate the prevailing reservoir pressure given the same energy, rock and fluid properties.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202331002
2023-10-02
2024-10-11

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References

  1. 1.E. T.Montague, HafnehAirul.: “Identification and Modeling of Inter-Reservoir Cross-flow Using a Novel Material Balance Method”, SPE-171488-MS, October 2014
     [Google Scholar]
  2. 2.ChukwuemekaN, IkwanU, ChimaE.:”Material Balance Modelling of Hydraulically Connected Reservoirs in a Single System: Case Studies”, SPE 167561, Nigeria Annual International Conference and Exhibition, 2013.
     [Google Scholar]
  3. 3.MojtabaM., MehdiZ.: “Analytical Model of Fault Leakage in Compartmentalized Reservoirs Considering Three-Directional Flow in the Fault Zone”, SPE 195276-MS, SPE Western Regional Meeting, 2019
     [Google Scholar]
  4. 4.MogboluE, OkerekeO, OkpoririC, UkaukuI, EsharegharanO, TaiwoI, SukuboI.: “Using Material Balance (MBAL) Multi Tank Model to Evaluate Future Well Performance in Reservoirs with Distinct Geological Unit”, SPE 178484-MS, August 2015
     [Google Scholar]
  5. 5.ShittuH, KemelayefaF, EmekaE.: ‘‘Probabilistic Material Balance: Application in Green Field Development Planning’’ SPE 172434-MS, August 2014
     [Google Scholar]
  6. 6.TarekAhmed, Paul D.McKinney “Advanced Reservoir Engineering”, Elsevier, 2005
     [Google Scholar]
  7. 7.DakeL.P.: “Fundamentals of Reservoir Engineering”, 1978
     [Google Scholar]
  8. 8.ChangalvaieV.V., LovimiK., KhaksarA., “Mechanism of Excessive Water Production in an Iranian Offshore”, 2012 International Conference on Bioscience, Biochemistry and Bioinformatics Singapore
     [Google Scholar]
  9. 9.HaijunF., AtifZ., S. G.Alam, MuhammadK., AsifM.: “Analyses of Nature of Fault through Production Data”. Open Journal of Yangtze Gas and Oil, 2017. 2, 176–190
     [Google Scholar]
  10. 10.Na-HyunJung, Weon ShikHan, KyungdoeHan, and EungyuPark: “Regional-scale advective, diffusive, and eruptive dynamics of CO2 and brine leakage through faults and wellbores”, Journal of Geophysical Research: Solid Earth, 2015
     [Google Scholar]
  11. 11.Gherardi, F., T.Xu, and K.Pruess (2007), Numerical modeling of self-limiting and self-enhancing caprock alteration induced by CO2storage ina depleted gas reservoir,Chem. Geol.,244(1–2), 103–129
     [Google Scholar]
  12. 12.Cole, F.W.: “Reservoir Engineering Manual”, Gulf Publishing Co., Houston (1969) 285
     [Google Scholar]
  13. 13.J. L.Pletcher: “Improvements to Reservoir Material Balance Methods”, SPE-62882-MS, October 2000.
     [Google Scholar]
  14. 14.Canović, M., Kemenci, R., 1999. Geologic setting of the Pre-Tertiary basement in Vojvodina Part II: The north part of the Vardar zone in the south of Vojvodina, Acta Geologica Hungarica, vol. 42/4, pp. 427–449
     [Google Scholar]
  15. 15.Watts, N., L., 1987. Theoretical aspects of cap-rock and fault seals for single and two-phase hydrocarbon columns: Marine and Petroleum Geology
     [Google Scholar]
  16. 16.Allan, U.S: “Model for hydrocarbon migration and entrapment within faulted structures”, 1989. AAPG
     [Google Scholar]
  17. 17.Cihan, A., Birkholzer, J.T., Zhou, Q.: “Pressure Buildup and Brine Migration During CO2 Storage in Multilayered Aquifers”, 2012
     [Google Scholar]
  18. 18.Takahashi, M: “Permeability change during experimental fault smearing”., 2003. Journal of Geophysical Research
     [Google Scholar]
  19. 19.Underschulz, J., Strand, J.: “Capillary seal capacity of faults under hydrodynamic conditions”, 2016. Geofluids
     [Google Scholar]
  20. 20.FrischbutterA, FisherQJ, NamazovaG, DufourS: “The value of fault property analysis for field development planning”, 2015. European Association of Geoscientists and Engineers Fourth International Conference on Fault and Top Seals, Almeria, Spain20–24 September
     [Google Scholar]
  21. 21.Yielding, G.: “Shale gouge ratio–calibration by geohistory”, 2002. Norwegian Petroleum Society Special Publications
     [Google Scholar]
  22. 22.Underschultz, J: “Hydrodynamics and membrane seal capacity”, 2007. Geofluids
     [Google Scholar]
/content/papers/10.3997/2214-4609.202331002
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Evaluation of CO2 Cross-Flow in Compartmentalized Reservoirs in Gas Field Using Material Balance Modelling
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.202331002
/content/papers/10.3997/2214-4609.202331002
/content/papers/10.3997/2214-4609.202331002
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