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A CO 2 assisted steam flooding in late steam flooding in heavy oil reservoirs
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chang-Feng, Xi Zongyao, Qi Yunjun, Zhanf Tong, Liu De-Huang, Shen Hetaer, Mu Pyo, Dong Xiu-Luan, Li You-Wei, Jiang Hong-Zhuang, Wang |
| Copyright Year | 2019 |
| Abstract | To improve the oil recovery and economic efficiency in heavy oil reservoirs, taking J6 Block of Xinjiang Oilfield as the research object, physical modeling experiments of steam flooding, CO2-foam assisted steam flooding, and CO2 assisted steam flooding under different perforation conditions are conducted, and CO2-assisted gravity steam flooding was proposed for reservoirs in the late stage of steam flooding. The experimental results show that after steam flooding, the CO2 assisted steam flooding formed a lateral expansion of the steam chamber in the middle and lower parts of the injection well and a development model for the production of super gravity discharge oil in the top chamber of the well; high temperature water, oil, and CO2 formed stable low-viscosity quasi-single-phase emulsified fluid; and CO2 acted as a thermal insulation in the steam chamber at the top, reducing the steam partial pressure inside the steam chamber, and effectively improving the heat efficiency of injected steam. Based on the three-dimensional experiments and the current situation of the J6 block in Xinjiang Oilfield, the CO2 assisted steam flooding for the J6 block was designed. The application showed that the CO2 assisted steam flooding made the oil vapor ratio increase from 0.12 to 0.16 by 34.0%, the oil recovery increase from 16.1% to 21.5%, and the final oil recovery go up to 66.5%. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.cpedm.com/CN/article/openArticlePDF.jsp?id=3151 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
