Abstract
The Jiyuan oil field is a tight sandstone reservoir, and water injection does not effectively enhance the oil recovery. The microscopic seepage characteristics of water flooding are studied through physical and streamline simulation experiments. The results indicate that the piston-type displacement efficiency varies between 60% and 80%, and the nonpiston-type displacement efficiency reaches approximately 40%. The length of the horizontal section imposes the greatest influence on reservoir production, followed by the fracture length and the number of fracture segments, whereas the fracture conductivity impacts reservoir production the least. When the horizontal section length is 1,500 m, and the fracture length is 1,100 m, 5 fracture segments and 10 horizontal well clusters are adopted, and the conductivity of the artificial fractures reaches , while the oil field production efficiency reaches its maximum value. The preceding research results were applied in the Jiyuan oil field, and the results reveal that the initial well production increased by 47.06%, the decline rate decreased by 9.96%, and the well output increased by 19.1% during the stable production period. This research yields a reference significance for the efficient development of similar reservoirs.
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Data Availability Statement
All data, models, and code supporting the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study was supported by a National Major Project (2017ZX05008-004-004-001). The authors wish to thank the editors and anonymous reviewers for their valuable suggestions regarding this paper.
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Information & Authors
Information
Published In
Journal of Energy Engineering
Volume 147 • Issue 6 • December 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 9, 2021
Accepted: Jul 13, 2021
Published online: Oct 8, 2021
Published in print: Dec 1, 2021
Discussion open until: Mar 8, 2022
ASCE Technical Topics:
- Basins
- Bodies of water (by type)
- Continuum mechanics
- Cracking
- Displacement (mechanics)
- Energy infrastructure
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Field tests
- Fracture mechanics
- Geomechanics
- Geotechnical engineering
- Hydraulic engineering
- Hydraulic structures
- Infrastructure
- Lifeline systems
- Materials engineering
- Reservoirs
- Sandstone
- Seepage
- Soil mechanics
- Soil properties
- Solid mechanics
- Stones
- Structural mechanics
- Tests (by type)
- Water and water resources
- Water management
- Wells (oil and gas)
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