Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after Development
The reservoir heterogeneity of Q oilfield is more severe after long-term water injection development, and water flooding is ineffective. In this study, the combined technologies of profile control, profile control and flooding, and oil displacement were proposed to improve the water flooding develop...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/7/2438 |
| _version_ | 1827623683738304512 |
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| author | Hongjun Fan Xiabin Wang Weijia Cao Kun Yan Kun Xie Xiangguo Lu Mingwei He |
| author_facet | Hongjun Fan Xiabin Wang Weijia Cao Kun Yan Kun Xie Xiangguo Lu Mingwei He |
| author_sort | Hongjun Fan |
| collection | DOAJ |
| description | The reservoir heterogeneity of Q oilfield is more severe after long-term water injection development, and water flooding is ineffective. In this study, the combined technologies of profile control, profile control and flooding, and oil displacement were proposed to improve the water flooding development effect. Then, the influence of the well pattern type on the remaining oil distribution, after development, was investigated. Cr<sup>3+</sup> polymer gel, which has an optimal gel-forming effect, was used as the profile control agent. Moreover, the entire molecular structure had a “network” structure. A polymer microsphere was used as a profile control and flooding agent, which showed a good hydration expansion capacity. The initial particle size distribution had a range of 7.2–11.1 μm, and the expansion multiple was 4.35–5.64 after 7 days. The surfactant was an oil displacement agent, and the interfacial tension was approximately 5.08–5.11 × 10<sup>−1</sup> mN/m. After the “profile control + profile control and flooding + oil displacement” technologies, the horizontal well pattern had a large seepage area. The effect of expanding the sweep volume was significant, and the remaining oil saturation in each stage was lower than those of the vertical and horizontal–vertical combined well patterns. Compared with the first water flooding stage, the remaining oil saturation values of the three permeable layers changed by 11.9%, 17.3%, and 19.8% during the subsequent water flooding stage. |
| first_indexed | 2024-03-09T11:55:14Z |
| format | Article |
| id | doaj.art-156be4a464e442b58c3f162cdcfe1c81 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T11:55:14Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-156be4a464e442b58c3f162cdcfe1c812023-11-30T23:10:11ZengMDPI AGEnergies1996-10732022-03-01157243810.3390/en15072438Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after DevelopmentHongjun Fan0Xiabin Wang1Weijia Cao2Kun Yan3Kun Xie4Xiangguo Lu5Mingwei He6State Key Laboratory of Offshore Oil Exploitation, CNOOC, Beijing 100028, ChinaState Key Laboratory of Offshore Oil Exploitation, CNOOC, Beijing 100028, ChinaKey Laboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing 166318, ChinaKey Laboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing 166318, ChinaKey Laboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing 166318, ChinaKey Laboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing 166318, ChinaState Key Laboratory of Offshore Oil Exploitation, CNOOC, Beijing 100028, ChinaThe reservoir heterogeneity of Q oilfield is more severe after long-term water injection development, and water flooding is ineffective. In this study, the combined technologies of profile control, profile control and flooding, and oil displacement were proposed to improve the water flooding development effect. Then, the influence of the well pattern type on the remaining oil distribution, after development, was investigated. Cr<sup>3+</sup> polymer gel, which has an optimal gel-forming effect, was used as the profile control agent. Moreover, the entire molecular structure had a “network” structure. A polymer microsphere was used as a profile control and flooding agent, which showed a good hydration expansion capacity. The initial particle size distribution had a range of 7.2–11.1 μm, and the expansion multiple was 4.35–5.64 after 7 days. The surfactant was an oil displacement agent, and the interfacial tension was approximately 5.08–5.11 × 10<sup>−1</sup> mN/m. After the “profile control + profile control and flooding + oil displacement” technologies, the horizontal well pattern had a large seepage area. The effect of expanding the sweep volume was significant, and the remaining oil saturation in each stage was lower than those of the vertical and horizontal–vertical combined well patterns. Compared with the first water flooding stage, the remaining oil saturation values of the three permeable layers changed by 11.9%, 17.3%, and 19.8% during the subsequent water flooding stage.https://www.mdpi.com/1996-1073/15/7/2438profile controloil displacementwell patternhorizontal wellvertical wellremaining oil saturation |
| spellingShingle | Hongjun Fan Xiabin Wang Weijia Cao Kun Yan Kun Xie Xiangguo Lu Mingwei He Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after Development Energies profile control oil displacement well pattern horizontal well vertical well remaining oil saturation |
| title | Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after Development |
| title_full | Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after Development |
| title_fullStr | Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after Development |
| title_full_unstemmed | Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after Development |
| title_short | Influence of Well Pattern Type on Remaining Oil Saturation and Distribution after Development |
| title_sort | influence of well pattern type on remaining oil saturation and distribution after development |
| topic | profile control oil displacement well pattern horizontal well vertical well remaining oil saturation |
| url | https://www.mdpi.com/1996-1073/15/7/2438 |
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