Study and Application of Ultrafine Temperature-Resistant and Salt-Tolerant Swellable Particles in Low Permeability Reservoirs

Meilong Fu, Junbo Zhang (), Guojun Li, Jiani Hu, Peng Chen, Lifeng Chen and Honglin He
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Meilong Fu: Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Junbo Zhang: Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Guojun Li: Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Jiani Hu: Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Peng Chen: Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Lifeng Chen: Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, College of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Honglin He: Qinghai Oilfield Drilling and Production Technology Research Institute, Dunhuang 736200, China

Energies, 2022, vol. 15, issue 18, 1-13

Abstract: Based on the characteristics of low-permeability oil and gas reservoirs and the requirements for profile control and water plugging and for water cut decrease and production increase in the high water cut stage of the middle and late exploitation periods, ultrafine temperature-resistant and salt-tolerant swellable particles DS-1 suitable for low permeability oilfields were prepared by introducing N,N-dimethylacrylamide(DMAA) monomers into the 2-acrylamido-2-methylpropanesulfonic acid (AMPS)/acrylamide(AM)/N,N-dimethylbisacrylamide ternary crosslinking system. The median of initial particle size was 22.00 μm, and is compatible with formation pore throats. A static water absorption experiment showed that the particles can still maintain a high swelling ratio after 15 days at a high temperature and high mineralization degree, so they have long-term stability. The physical and chemical properties of the particles were analyzed microscopically using the infrared spectrum method and the scanning electron microscope (SEM) method. A dynamic displacement experiment confirmed that the particles can effectively plug dominant channels of waterflooding, increase the injection pressure, and improve the interlayer and intralayer heterogeneity. In the field experiment, the swellable particles DS-1 were used as a main slug for water plugging operations, and a good water cut decrease and oil production increase effect was obtained.

Keywords: low-permeability reservoir; swellable particles; profile control and water plugging; water cut decrease and oil production increase (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: 2022
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