Quantitative Characterization Method of Additional Resistance Based on Suspended Particle Migration and Deposition Model

Huan Chen, Yanfeng Cao, Jifei Yu, Xiaopeng Zhai (), Jianlin Peng, Wei Cheng, Tongchuan Hao, Xiaotong Zhang and Weitao Zhu
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Huan Chen: State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 100020, China
Yanfeng Cao: State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 100020, China
Jifei Yu: State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 100020, China
Xiaopeng Zhai: Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China
Jianlin Peng: State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 100020, China
Wei Cheng: Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China
Tongchuan Hao: State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 100020, China
Xiaotong Zhang: State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 100020, China
Weitao Zhu: State Key Laboratory of Offshore Oil and Gas Exploitation, Beijing 100020, China

Energies, 2024, vol. 17, issue 24, 1-19

Abstract: The phenomenon of pore blockage caused by injected suspended particles significantly impacts the efficiency of water injection and production capacity release in offshore oilfields, leading to increased additional resistance during the injection process. To enhance water injection volumes in injection wells, it is essential to quantitatively study the additional resistance caused by suspended particle blockage during water injection. However, there is currently no model for calculating the additional resistance resulting from suspended particle blockage. Therefore, this study establishes a permeability decline model based on the microscopic dispersion kinetic equation of particle transport. The degree of blockage is characterized by the reduction in fluid volume, and the additional resistance caused by particle migration and blockage during water injection is quantified based on the fluid volume decline. This study reveals that over time, suspended particles do not continuously migrate deeper into the formation but tend to deposit near the wellbore, blocking pores and increasing additional resistance. Over time, the concentration of suspended particles near the wellbore approaches the initial concentration of the injected water. An increase in seepage velocity raises the peak concentration of suspended particles, but when the seepage velocity reaches a certain threshold, its effect on particle migration stabilizes. The blockage location of suspended particles near the wellbore is significantly influenced by seepage velocity and time. An increase in particle concentration and size accelerates blockage formation but does not change the blockage location. As injection time increases, the fitted injection volume and permeability exhibit a power-law decline. Based on the trend of injection volume reduction, the additional resistance caused by water injection is calculated to range between 0 and 3.85 MPa. Engineering cases indicate that blockages are challenging to remove after acidification, and the reduction in additional resistance is limited. This study provides a quantitative basis for understanding blockage patterns during water injection, helps predict changes in additional resistance, and offers a theoretical foundation for targeted treatment measures.

Keywords: water injection; blockage; particle deposition; additional resistance; particle migration (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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