Movable oil extraction from shale with supercritical carbon dioxide

WANG Qiang; LI Zhiming; QIAN Menhui; JIANG Qigui; CAO Tingting; LIU Peng; BAO Yunjie; TAO Guoliang

doi:10.11781/sysydz202004646

Volume 42 Issue 4

Jul. 2020

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WANG Qiang, LI Zhiming, QIAN Menhui, JIANG Qigui, CAO Tingting, LIU Peng, BAO Yunjie, TAO Guoliang. Movable oil extraction from shale with supercritical carbon dioxide[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2020, 42(4): 646-652. doi: 10.11781/sysydz202004646

Citation:

WANG Qiang, LI Zhiming, QIAN Menhui, JIANG Qigui, CAO Tingting, LIU Peng, BAO Yunjie, TAO Guoliang. Movable oil extraction from shale with supercritical carbon dioxide[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2020, 42(4): 646-652. doi: 10.11781/sysydz202004646

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Movable oil extraction from shale with supercritical carbon dioxide

doi: 10.11781/sysydz202004646

WANG Qiang^{1, 2, 3
,},
LI Zhiming^{1, 2, 3
,
,},
QIAN Menhui^{1, 2, 3},
JIANG Qigui^{1, 2, 3},
CAO Tingting^{1, 2, 3},
LIU Peng^{1, 2, 3},
BAO Yunjie^{1, 2, 3},
TAO Guoliang^{1, 2, 3}

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu 214126, China
3.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China

Received Date: 2020-03-07
Rev Recd Date: 2020-06-10
Publish Date: 2020-07-28

Abstract

Abstract

Movable oil extraction experiments from the lower part of third member of Paleogene Shahejie Formation (Es₃^L) in the Zhanhua Sag of Jiyang Depression of Bohai Bay Basin were made to address problems on matrix shale oil exploitation. Various negative pressure and different supercritical carbon dioxide fluid pressures at strata temperature were used after fracturing in a closed system. Only traces of light hydrocarbons (< C₁₅) can flow at strata temperature and negative pressure. The carbon number of the main components of movable oil increases with extraction time with supercritical carbon dioxide under the same strata temperature and fluid pressure, and the contents of movable oil increase with fluid pressure increase. The light and medium weight hydrocarbon components in the free state are extracted effectively and some heavy hydrocarbon components in the bound-state (adsorption and miscible state) are also extracted. It suggests that the technology of supercritical carbon dioxide has a good prospect for improving recovery efficiency of matrix shale oil.
- supercritical CO₂,
- strata temperature,
- pressure,
- shale,
- shale oil,
- Shahejie Formation,
- Jiyang Depression

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References(25)

References

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Movable oil extraction from shale with supercritical carbon dioxide

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