Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oil
Abstract In this study, nuclear magnetic resonance and computed tomography scanning were used to analyze the production law and displacement mechanism of Jimusaer continental shale oil during CO2 huff ‘n’ puff, and the optimal parameters were determined. The results indicated that CO2 huff ‘n’ puff...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-11-01
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| Series: | Energy Science & Engineering |
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| Online Access: | https://doi.org/10.1002/ese3.1585 |
| _version_ | 1797628255512035328 |
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| author | Chunmiao Ma Fengqi Tan Ninghong Jia Jianhua Qin Xiankun Li Yuqian Jing Ruihai Jiang |
| author_facet | Chunmiao Ma Fengqi Tan Ninghong Jia Jianhua Qin Xiankun Li Yuqian Jing Ruihai Jiang |
| author_sort | Chunmiao Ma |
| collection | DOAJ |
| description | Abstract In this study, nuclear magnetic resonance and computed tomography scanning were used to analyze the production law and displacement mechanism of Jimusaer continental shale oil during CO2 huff ‘n’ puff, and the optimal parameters were determined. The results indicated that CO2 huff ‘n’ puff mainly produces crude oil in pore throats with 0.1–1 μm radii, while crude oil in pore throats with radii below 0.1 μm cannot be produced. Multiple CO2 huff ‘n’ puff cycles can connect fluids in fractures with fluids in large–medium pore throats, eliminate fracture effects on the oil recovery factor, and achieve coefficient development of both fractured and unfractured shales. In the CO2 huff ‘n’ puff process, core pressure change could be divided into three stages of injection–holding–depletion, and the oil displacement mode was the piston type. The study of huff ‘n’ puff parameters revealed that huff ‘n’ puff cycles and injection pressure have a great influence on the CO2 huff ‘n’ puff efficiency, while the injection timing and soaking time imposed relatively small effects. For continental shale in the Jimusaer Sag, the optimal CO2 huff ‘n’ puff parameters are five cycles, 4‐MPa injection timing, 25‐MPa injection pressure, and 12‐h soaking time. |
| first_indexed | 2024-03-11T10:36:47Z |
| format | Article |
| id | doaj.art-b6d369fb832f4e93963000180aac7f42 |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-03-11T10:36:47Z |
| publishDate | 2023-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-b6d369fb832f4e93963000180aac7f422023-11-14T10:35:15ZengWileyEnergy Science & Engineering2050-05052023-11-0111114349436510.1002/ese3.1585Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oilChunmiao Ma0Fengqi Tan1Ninghong Jia2Jianhua Qin3Xiankun Li4Yuqian Jing5Ruihai Jiang6College of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing ChinaCollege of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing ChinaResearch Institute of Petroleum Exploration and Development Beijing ChinaXinjiang Oilfield Company, PetroChina Karamay Xinjiang ChinaCollege of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing ChinaCollege of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing ChinaCollege of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing ChinaAbstract In this study, nuclear magnetic resonance and computed tomography scanning were used to analyze the production law and displacement mechanism of Jimusaer continental shale oil during CO2 huff ‘n’ puff, and the optimal parameters were determined. The results indicated that CO2 huff ‘n’ puff mainly produces crude oil in pore throats with 0.1–1 μm radii, while crude oil in pore throats with radii below 0.1 μm cannot be produced. Multiple CO2 huff ‘n’ puff cycles can connect fluids in fractures with fluids in large–medium pore throats, eliminate fracture effects on the oil recovery factor, and achieve coefficient development of both fractured and unfractured shales. In the CO2 huff ‘n’ puff process, core pressure change could be divided into three stages of injection–holding–depletion, and the oil displacement mode was the piston type. The study of huff ‘n’ puff parameters revealed that huff ‘n’ puff cycles and injection pressure have a great influence on the CO2 huff ‘n’ puff efficiency, while the injection timing and soaking time imposed relatively small effects. For continental shale in the Jimusaer Sag, the optimal CO2 huff ‘n’ puff parameters are five cycles, 4‐MPa injection timing, 25‐MPa injection pressure, and 12‐h soaking time.https://doi.org/10.1002/ese3.1585CO2 huff ‘n’ puffcontinental shale oiloptimization parametersproduction law |
| spellingShingle | Chunmiao Ma Fengqi Tan Ninghong Jia Jianhua Qin Xiankun Li Yuqian Jing Ruihai Jiang Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oil Energy Science & Engineering CO2 huff ‘n’ puff continental shale oil optimization parameters production law |
| title | Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oil |
| title_full | Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oil |
| title_fullStr | Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oil |
| title_full_unstemmed | Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oil |
| title_short | Study on the production law and optimization parameters of CO2 huff ‘n’ puff for continental shale oil |
| title_sort | study on the production law and optimization parameters of co2 huff n puff for continental shale oil |
| topic | CO2 huff ‘n’ puff continental shale oil optimization parameters production law |
| url | https://doi.org/10.1002/ese3.1585 |
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