首页|Experimental study of the influencing factors and mechanisms of the pressure-reduction and augmented injection effect by nanoparticles in ultra-low permeability reservoirs

Experimental study of the influencing factors and mechanisms of the pressure-reduction and augmented injection effect by nanoparticles in ultra-low permeability reservoirs

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Nanoparticles(NPs)have gained significant attention as a functional material due to their ability to effectively enhance pressure reduction in injection processes in ultra-low permeability reservoirs.NPs are typically studied in controlled laboratory conditions,and their behavior in real-world,complex en-vironments such as ultra-low permeability reservoirs,is not well understood due to the limited scope of their applications.This study investigates the efficacy and underlying mechanisms of NPs in decreasing injection pressure under various injection conditions(25-85 ℃,10-25 MPa).The results reveal that under optimal injection conditions,NPs effectively reduce injection pressure by a maximum of 22.77％in core experiment.The pressure reduction rate is found to be positively correlated with oil saturation and permeability,and negatively correlated with temperature and salinity.Furthermore,particle image velocimetry(PIV)experiments(25 ℃,atmospheric pressure)indicate that the pressure reduction is achieved by NPs through the reduction of wall shear resistance and wettability change.This work has important implications for the design of water injection strategies in ultra-low permeability reservoirs.

NanoparticlePressure reductionAugmented injectionUltra-low permeability reservoir

Pan Wang、Yu-Hang Hu、Liao-Yuan Zhang、Yong Meng、Zhen-Fu Ma、Tian-Ru Wang、Zi-Lin Zhang、Ji-Chao Fang、Xiao-Qiang Liu、Qing You、Yan Zhang

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Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering,China University of Geosciences(Beijing),Beijing,100083,China

School of Energy Resources,China University of Geosciences(Beijing),Beijing,100083,China

Petroleum Engineering Technology Research Institute,SINOPEC Shengli Oilfield Company,Dongying 257000,Shandong,China

Hekou Oil Production Plant,Sinopec Shengli Oilfield Company,Dongying,257200,Shandong,China

Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China

CNPC Engineering Technology R&D Company Limited,Beijing,102206,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities

52074249U166320652204069

2024

10.1016/j.petsci.2023.11.024

石油科学(英文版)
中国石油大学（北京）

石油科学(英文版)

EI
影响因子：0.88
ISSN：1672-5107
年,卷(期)：2024.21(3)