Research progress on chemical flooding system in Shengli Oilfield and new evaluation methods for resource potential
Chemical flooding is an essential means to enhance oil recovery， and the scientific application boundaries of flooding systems and the evaluation methods for resource potential play a crucial role in the sustainable development of chemical flooding resources. For a long time， evaluation methods for...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Petroleum Geology and Recovery Efficiency
2025-07-01
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| Series: | Youqi dizhi yu caishoulu |
| Subjects: | |
| Online Access: | https://yqcs.publish.founderss.cn/thesisDetails#10.13673/j.pgre.202502009&lang=en |
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| Summary: | Chemical flooding is an essential means to enhance oil recovery， and the scientific application boundaries of flooding systems and the evaluation methods for resource potential play a crucial role in the sustainable development of chemical flooding resources. For a long time， evaluation methods for chemical flooding potential， both in China and abroad， have generally focused on key indicators such as reservoir characteristics and formation fluid properties； however， they have not been associated with the applicable boundaries of flooding systems. With the performance improvement of flooding systems， the application boundaries of chemical flooding technology have expanded， making traditional evaluation methods for resource potential increasingly limited in terms of pertinence， operability， and foresight when facing a wider range of reservoir types. To overcome this key issue， this article systematically reviewed the evaluation methods for chemical flooding resource potential in China and abroad， focusing on the new oil displacement agents and systems developed by Shengli Oilfield through continuous research and development in recent years， as well as the expansion of applicable boundaries in different dimensions. Among them， the temperature boundary has been expanded to 95 °C； the mineralization boundary has been expanded to 5 × 104 mg/L； the calcium and magnesium ion content has been expanded to 1 500 mg/L； the crude oil viscosity boundary has been expanded to 1 000 mPa·s， and the permeability boundary has been expanded to below 10 × 10-3 μm2. A new evaluation method for resource potential related to the adaptability of chemical flooding systems has been established， dividing Shengli chemical flooding resources into five categories： reservoirs after polymer flooding， offshore reservoirs， low-efficiency ordinary heavy oil reservoirs， high-temperature and high-salinity reservoirs， and medium- and low-permeability reservoirs. At the same time， an intuitive reference chart for the applicability of chemical flooding systems was constructed to guide the development and practice of different types of chemical flooding resources more scientifically and efficiently. As a result， the chemical flooding reserves have increased by more than 10 × 108 t. |
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| ISSN: | 1009-9603 |