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Assessment of Aquifer Performance for Oil Drainage in the Upper Pinda Reservoir of the Mibale Field

Received: 8 March 2021     Accepted: 22 March 2021     Published: 1 April 2021
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Abstract

The Mibale field in offsore of the DRC has been producing oil since 1976. This field is faced with the arrival of massive water and the depletion of its reservoir leading to the drop in its oil production, while the injection of water is effective for several decades. Understanding the behavior of the aquifer in this reservoir is a solution to the application of effective water flooding for oil drainage to this field. The objective pursued in this study is to evaluate the performance of the aquifer on the basis of the material balance equation, to understand its behavior in maintaining or not the pressure in this reservoir in order to identify the causes related to this depletion and the influx of water despite the application of water flooding techniques. To reach this goal, the data collection during the internship made it possible to analyze and process this data using professional software. The results show that the overall drainage index of the water drainage mechanism is 84% (due to 20% for the aquifer alone and 64% for the water flooding) and 10% of oil compressibility. (IDOI), 6% of dissolved gas segregation (IDS). Reserves in this reservoir are estimated at 4.5 million barrels. The aquifer is inactive, semi-radial linear with a constant (U) estimated at 595.5 barrels per psi (bbl / psi) and an initial volume (WI) of 347.1 million barrels (Mbbl). Cumulative contributions from this aquifer are estimated at 173,868,933 barrels for the last 42 years of operation. This aquifer alone has no influence on the inflow of water and the maintenance of pressure, but its influence increases with water from injection wells. In conclusion, this inactive aquifer is located in the carbonate Karst of Upper Pinda to the north of the deposit. Being inactive, this aquifer is not at the origin of breakthrough or coning water acting in this field. It is likely that this phenomenon is amplified by water flooding. Which allows us to classify water flooding technology among aquifer drainage mechanisms; since this significantly activates the behavior of the aquifer and has the same effects as the aquifer.

Published in Petroleum Science and Engineering (Volume 5, Issue 1)
DOI 10.11648/j.pse.20210501.12
Page(s) 13-31
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Assessment, Aquifer Performance, Oil Drainage, Upper Pinda Reservoir, Mibale Field

References
[1] Abhijit Y. Dandekar, 2013: Petroleum Reservoir Rock and Fluid properties.
[2] Bimbanga-Kumbana Wa Baki, 1991: Suivi de la production et de l’injection d’eau sur le champ MIBALE dans la concession ZAGOC.
[3] B. C. Craft, M. Hawkins, 1990: Applied Petroleum Reservoir Engineering 2th edition 226p.
[4] Gaffney, Cline & Associates, 1987: A study of reserves of the coastal basin, republic of zaire. Mibale field review.
[5] Gaffney and al, 1988: Étude sur les réserves du bassin littoral de la république du zaïre. Compte rendu du gisement de MIBALE Est/TSHIENDE.
[6] Gia Luigi Chierici, 1994: Principles of Petroleum Reservoir Engineering. 421p Springer International Publishing.
[7] John R. Fanchi, 2006: Principales of Applied Reservoir Simulation, 3th Edition Gulf Professional Publishing, Elsevier 517p.
[8] John R. and al, 2017: Introduction to Petroleum Engineering. 344p.
[9] J. R. Ursin and A. B. Zolotukhin Stavanger, 1997: Fundamentals of Petroleum Reservoir Engineering. 217p.
[10] L. P Dake, 1978: Fundamentals of reservoir engineering, Elsevier scientific publishing company. Book.
[11] L. P Dake, 2001: The practice of Reservoir Engineering Revised edition.
[12] Logar J. F, 1989: Well Evaluation conference-Wouest Africa, Edition Schlumberger, Paris.
[13] Ma Y. Zee, 2019: Quantitative Geosciences data analysics, Geostatistics, Reservoir characterization and Modelling. 640p Springer International Publishing.
[14] M. J. Fetkovich, spe•aime, phillips petroleum co, 1971: A Simplified Approach to Water Influx Calculations-Finite Aquifer Systems Published in Journal of Petroleum Technology.
[15] Nnaemaka Ezekwe, 2011: Petroleum Reservoir Engineering Practice, 801p.
[16] Ronald e. Terry, j. brandon rogers, 2015: Applied petroleum Reservoir Engineering 3th Edition.
[17] Oloro John, Ukrakpor Erhimudia Friday, 2011: Determination of water influx in reservoir in niger delta Published in Wilolud Journals.
[18] Okotie and al, 2019: Reservoir Engineering, Fundamentals and applications. 416p Springer International Publishing.
[19] Saleh G. and al, 2020: Aquifer characterization and Modelling, a case study of Oil Field. University Bullettin- ISSUE N°2- Vol (1)-2020.
[20] Tavakoli, Vahid, 2020: Carbonate Reservoir Heterogeneity, Overcoming the challenges. 108p.
[21] Tarek Ahmed, 2001: Reservoir engineering hand book, 2th Edition, Gulf Professional Publishing, 1211p.
[22] Tarek Ahmed, 2010: Reservoir Engineering handbook, 4th Edition, Gulf Professional Publishing, 1463p.
[23] William E. Brigham, 1997: Water Influx and Its effect on Oil Recovery; First Part, Aquifer Flow 109p.
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    Ondontshia Nkoyi Jean, Deko Oyema Bruno, Wetshondo Osomba Dominique, Lokata Ediho Patrick, Kangiama Lwangi Richard, et al. (2021). Assessment of Aquifer Performance for Oil Drainage in the Upper Pinda Reservoir of the Mibale Field. Petroleum Science and Engineering, 5(1), 13-31. https://doi.org/10.11648/j.pse.20210501.12

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    Ondontshia Nkoyi Jean; Deko Oyema Bruno; Wetshondo Osomba Dominique; Lokata Ediho Patrick; Kangiama Lwangi Richard, et al. Assessment of Aquifer Performance for Oil Drainage in the Upper Pinda Reservoir of the Mibale Field. Pet. Sci. Eng. 2021, 5(1), 13-31. doi: 10.11648/j.pse.20210501.12

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    AMA Style

    Ondontshia Nkoyi Jean, Deko Oyema Bruno, Wetshondo Osomba Dominique, Lokata Ediho Patrick, Kangiama Lwangi Richard, et al. Assessment of Aquifer Performance for Oil Drainage in the Upper Pinda Reservoir of the Mibale Field. Pet Sci Eng. 2021;5(1):13-31. doi: 10.11648/j.pse.20210501.12

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  • @article{10.11648/j.pse.20210501.12,
      author = {Ondontshia Nkoyi Jean and Deko Oyema Bruno and Wetshondo Osomba Dominique and Lokata Ediho Patrick and Kangiama Lwangi Richard and Katambwa Madika Cedrick and Munene Asidi Djonive and Mbudi Diambu Shams},
      title = {Assessment of Aquifer Performance for Oil Drainage in the Upper Pinda Reservoir of the Mibale Field},
      journal = {Petroleum Science and Engineering},
      volume = {5},
      number = {1},
      pages = {13-31},
      doi = {10.11648/j.pse.20210501.12},
      url = {https://doi.org/10.11648/j.pse.20210501.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.pse.20210501.12},
      abstract = {The Mibale field in offsore of the DRC has been producing oil since 1976. This field is faced with the arrival of massive water and the depletion of its reservoir leading to the drop in its oil production, while the injection of water is effective for several decades. Understanding the behavior of the aquifer in this reservoir is a solution to the application of effective water flooding for oil drainage to this field. The objective pursued in this study is to evaluate the performance of the aquifer on the basis of the material balance equation, to understand its behavior in maintaining or not the pressure in this reservoir in order to identify the causes related to this depletion and the influx of water despite the application of water flooding techniques. To reach this goal, the data collection during the internship made it possible to analyze and process this data using professional software. The results show that the overall drainage index of the water drainage mechanism is 84% (due to 20% for the aquifer alone and 64% for the water flooding) and 10% of oil compressibility. (IDOI), 6% of dissolved gas segregation (IDS). Reserves in this reservoir are estimated at 4.5 million barrels. The aquifer is inactive, semi-radial linear with a constant (U) estimated at 595.5 barrels per psi (bbl / psi) and an initial volume (WI) of 347.1 million barrels (Mbbl). Cumulative contributions from this aquifer are estimated at 173,868,933 barrels for the last 42 years of operation. This aquifer alone has no influence on the inflow of water and the maintenance of pressure, but its influence increases with water from injection wells. In conclusion, this inactive aquifer is located in the carbonate Karst of Upper Pinda to the north of the deposit. Being inactive, this aquifer is not at the origin of breakthrough or coning water acting in this field. It is likely that this phenomenon is amplified by water flooding. Which allows us to classify water flooding technology among aquifer drainage mechanisms; since this significantly activates the behavior of the aquifer and has the same effects as the aquifer.},
     year = {2021}
    }
    

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  • TY  - JOUR
    T1  - Assessment of Aquifer Performance for Oil Drainage in the Upper Pinda Reservoir of the Mibale Field
    AU  - Ondontshia Nkoyi Jean
    AU  - Deko Oyema Bruno
    AU  - Wetshondo Osomba Dominique
    AU  - Lokata Ediho Patrick
    AU  - Kangiama Lwangi Richard
    AU  - Katambwa Madika Cedrick
    AU  - Munene Asidi Djonive
    AU  - Mbudi Diambu Shams
    Y1  - 2021/04/01
    PY  - 2021
    N1  - https://doi.org/10.11648/j.pse.20210501.12
    DO  - 10.11648/j.pse.20210501.12
    T2  - Petroleum Science and Engineering
    JF  - Petroleum Science and Engineering
    JO  - Petroleum Science and Engineering
    SP  - 13
    EP  - 31
    PB  - Science Publishing Group
    SN  - 2640-4516
    UR  - https://doi.org/10.11648/j.pse.20210501.12
    AB  - The Mibale field in offsore of the DRC has been producing oil since 1976. This field is faced with the arrival of massive water and the depletion of its reservoir leading to the drop in its oil production, while the injection of water is effective for several decades. Understanding the behavior of the aquifer in this reservoir is a solution to the application of effective water flooding for oil drainage to this field. The objective pursued in this study is to evaluate the performance of the aquifer on the basis of the material balance equation, to understand its behavior in maintaining or not the pressure in this reservoir in order to identify the causes related to this depletion and the influx of water despite the application of water flooding techniques. To reach this goal, the data collection during the internship made it possible to analyze and process this data using professional software. The results show that the overall drainage index of the water drainage mechanism is 84% (due to 20% for the aquifer alone and 64% for the water flooding) and 10% of oil compressibility. (IDOI), 6% of dissolved gas segregation (IDS). Reserves in this reservoir are estimated at 4.5 million barrels. The aquifer is inactive, semi-radial linear with a constant (U) estimated at 595.5 barrels per psi (bbl / psi) and an initial volume (WI) of 347.1 million barrels (Mbbl). Cumulative contributions from this aquifer are estimated at 173,868,933 barrels for the last 42 years of operation. This aquifer alone has no influence on the inflow of water and the maintenance of pressure, but its influence increases with water from injection wells. In conclusion, this inactive aquifer is located in the carbonate Karst of Upper Pinda to the north of the deposit. Being inactive, this aquifer is not at the origin of breakthrough or coning water acting in this field. It is likely that this phenomenon is amplified by water flooding. Which allows us to classify water flooding technology among aquifer drainage mechanisms; since this significantly activates the behavior of the aquifer and has the same effects as the aquifer.
    VL  - 5
    IS  - 1
    ER  - 

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Author Information
  • Exploration and Production Department, Faculty of Oil, Gas and Renewable Energies, University of Kinshasa, Kinshasa, Congo Democratic Republic

  • Exploration and Production Department, Faculty of Oil, Gas and Renewable Energies, University of Kinshasa, Kinshasa, Congo Democratic Republic

  • Geoscience Department, Faculty of Sciences, University of Kinshasa, Kinshasa, Congo Democratic Republic

  • Exploration and Production Department, Faculty of Oil, Gas and Renewable Energies, University of Kinshasa, Kinshasa, Congo Democratic Republic

  • Basic sciences Department, Faculty of Oil, Gas and Renewable Energies, University of Kinshasa, Kinshasa, Congo Democratic Republic.

  • Law-Economics-Management, School of Logistics, University of Versailles Saint Quentin-en-Yvelines, Versailles, France

  • Exploration and Production Department, Faculty of Oil, Gas and Renewable Energies, University of Kinshasa, Kinshasa, Congo Democratic Republic

  • Exploration and Production Department, Faculty of Oil, Gas and Renewable Energies, University of Kinshasa, Kinshasa, Congo Democratic Republic

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