Version 1
: Received: 25 October 2024 / Approved: 25 October 2024 / Online: 28 October 2024 (10:46:53 CET)
How to cite:
Chen, Z.; Wang, L.; Luo, J.; Zhang, J. Visualization and Simulation of Foam-Assisted Gas Drive Mech-Anism in Surface Karst Slit-Hole Type Reservoirs. Preprints2024, 2024102052. https://doi.org/10.20944/preprints202410.2052.v1
Chen, Z.; Wang, L.; Luo, J.; Zhang, J. Visualization and Simulation of Foam-Assisted Gas Drive Mech-Anism in Surface Karst Slit-Hole Type Reservoirs. Preprints 2024, 2024102052. https://doi.org/10.20944/preprints202410.2052.v1
Chen, Z.; Wang, L.; Luo, J.; Zhang, J. Visualization and Simulation of Foam-Assisted Gas Drive Mech-Anism in Surface Karst Slit-Hole Type Reservoirs. Preprints2024, 2024102052. https://doi.org/10.20944/preprints202410.2052.v1
APA Style
Chen, Z., Wang, L., Luo, J., & Zhang, J. (2024). Visualization and Simulation of Foam-Assisted Gas Drive Mech-Anism in Surface Karst Slit-Hole Type Reservoirs. Preprints. https://doi.org/10.20944/preprints202410.2052.v1
Chicago/Turabian Style
Chen, Z., Juan Luo and Jianpeng Zhang. 2024 "Visualization and Simulation of Foam-Assisted Gas Drive Mech-Anism in Surface Karst Slit-Hole Type Reservoirs" Preprints. https://doi.org/10.20944/preprints202410.2052.v1
Abstract
Abstract: Nitrogen injection technology has become an important production technology after water injection development in the karst fracture-vuggy reservoir in Tahe oilfield. However, due to the influence of reservoir heterogeneity and high mobility of gas fluid, nitrogen is easy to form a dominant channel and gas channelling occurs, and the recovery effect time is short. Based on this, a visual surface karst model is designed and made to study nitrogen foam assisted gas drive. The results show that after gas channeling occurs in the dominant channel of nitrogen flooding, foam injection assisted gas flooding can improve oil recovery. In the longitudinal direction, foam assisted gas drive mainly displaces the remaining oil because of gravity differentiation and the reduction of oil-water interfacial tension. In the horizontal direction, foam assisted gas drive is mainly used to block the large pore cracks and dominant channels, and promote the gas to turn into the large tortuous and small cracks, and expand the swept efficiency of the gas.After forming the dominant channel, injecting 0.3pv salt-sensitive foam with a gas-liquid ratio of 2:1 in the middle of the gas channel can improve the recovery rate of the model from 4% to about 25%, and the recovery rate can be increased by about 20%, which improves the effect of gas flushing and improves the development efficiency of the oil field at the same time.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
