PRODUCTION ANALYSIS OF FIVE-SPOT MISCIBLE DISPLACEMENT SCHEMES IN GAS CONDENSATE RESERVOIRS.

Authors
  • Adeyanju, Olusiji Ayoade

    University of Lagos, Lagos

  • Adeosun, Tunde Adamson

    Yaba College of Technology, Lagos, Nigeria.

Keywords:
Condensate banks, retrograde condensation, re-vaporization, miscible displacement, condensate oil
Abstract

Production from gas condensate reservoirs has been of great concern to the petroleum industry. This is due to the complex flow behaviours in response to pressure drops across the reservoirs towards the wellbores. Valuable condensate liquid is lost due to reservoir pressure drops below the dew point pressure. The condensate bank formed by the accumulations of the immobile condensate liquids restricts the flow of gas in the vicinity of the wellbore into the wellbore thereby reducing the recovery factor of the gas in place. in this study, the application of a pressure maintenance scheme with the objective of keeping the reservoir fluid very close to the dew point pressure to alleviate such drastic loss in non-renewable resources is investigated. A carbon dioxide (CO2) gas miscible displacement injection scheme was implemented to optimally produce gas condensate reservoir. Additionally, the CO2 injection process into the subsurface reservoir serves as an avenue for the reduction of greenhouse gases in the environment.   A compositional model was implemented to simulate the different homogeneous gas condensate depletion schemes. The simulated model was used to determine the performance of other production approaches, with and without gas injection. A five-spot injection pattern with fine grids near the producer was employed to further investigate the condensate oil saturation profile. Results show that among the investigated schemes, purely CO2 injection process returned both the highest profit margin and maximum fractional recovery of $176.65 million (USD) with 86.35% respectively, while complete natural depletion produced the least profit margin and minimum fractional recovery of $69.63 million (USD) with 34.17 respectively. The result shows that the profit and the fractional recovery of different production schemes reduces as natural depletion prior to the CO2 gas injection increases.

Author Biographies
  1. Adeyanju, Olusiji Ayoade , University of Lagos, Lagos

    Department of Petroleum and Gas Engineering

  2. Adeosun, Tunde Adamson, Yaba College of Technology, Lagos, Nigeria.

    Department of Mineral and Petroleum Engineering

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2025-05-30
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How to Cite

PRODUCTION ANALYSIS OF FIVE-SPOT MISCIBLE DISPLACEMENT SCHEMES IN GAS CONDENSATE RESERVOIRS. (2025). FUTA JOURNAL OF ENGINEERING AND ENGINEERING TECHNOLOGY, 19(1), 114-125. https://doi.org/10.51459/futajeet.2025.19.1.467

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