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Techno-Economic Analysis of Various Technologies for Offshore Flare Gas Recovery in Iran

Khadem Rasoul, Mohsen | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57976 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Sattari, Sorena
  7. Abstract:
  8. In 2023, global gas flaring at upstream oil and gas facilities reached its highest level in the past five years, with a 7% increase compared to the previous year. Iran, which is the second-largest flare of gas in the world after Russia, saw the largest increase globally, with a 19% rise in flaring volume. On the other hand, while offshore fields have accounted for about 12% of Iran's total oil production over the past decade, these fields have contributed to nearly 40% of the country’s total gas flaring. This study explored the feasibility of four methods for recovering flared gas from Iran’s offshore fields, including: transporting flared gas to land for sale as raw gas, transporting it to land for processing at an NGL unit and selling the processed gas and liquid gas products, using the processed gas to generate electricity in a combined cycle power plant, and using the processed gas for freshwater production in a multi-stage MED desalination plant. The technical simulations of these processes were conducted using ASPEN software, and their economic evaluations were performed with QUESTOR software. The impact of operational and economic parameters on the proposed systems was also analyzed. The results showed that, considering the characteristics of flared gas in Iran's offshore fields, along with the average export prices for gas and electricity in Iran, and an internal rate of return (IRR) of 6%, the cost per cubic meter of processed flared gas and per megawatt-hour of electricity produced from it were 0.37 and0.61 of their respective export prices, respectively. Additionally, the cost of producing one cubic meter of freshwater was calculated to be which is nearly double the global price. However, financial constraints for investing in new projects and completing previous ones on the one hand, and legal and institutional limitations on the other hand, prevent the full realization of the objectives of such initiatives in Iran
  9. Keywords:
  10. Flare Gases Recovery ; Associated Gas ; Associated Gas Recovery Network ; Aspen HYSYS Software ; Economic and Technical Study ; QUESTOR Software ; Offshore Oil and Gas Fields

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