Experimental Investigation on the Imbibition Behavior of Nanofluids in the Tight Oil and Gas Reservoir through the Application of Nuclear Magnetic Resonance Method

Hui Li (), Can Wang, Ben Li, Xixia Wen, Jianchuan Li and Lu Tian
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Hui Li: Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China
Can Wang: Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China
Ben Li: Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China
Xixia Wen: Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China
Jianchuan Li: Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China
Lu Tian: Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China

Energies, 2022, vol. 16, issue 1, 1-13

Abstract: Tight oil and gas resources are widely distributed and play an important role in the petroleum industry. Due to its nanoscale pore-throat characteristics, the capillary effect is remarkable, and spontaneous imbibition is very beneficial to the development of low-permeability reservoirs. In this study, the imbibition experiments of 2D nano blackcard, nanoemulsion, and water were carried out, respectively. The pore-throat fluid distribution characteristics before and after core imbibition were analyzed with nuclear magnetic resonance technology, and the enhanced oil recovery effects of 2D nano blackcard nanoemulsion, and water were comprehensively evaluated. The results show that the final recovery factors of cores soaked in 2D nano blackcard (0.005 ωt%) and nanoemulsion (0.02 ωt%) or imbibed in water are 32.29%, 26.05%, and 7.19%, respectively. It can be found that 2D nano blackcard is the fluid with the best imbibition effect. In this work, a new type of 2D nano blackcard was proposed and identified as a functional imbibition fluid for enhanced oil recovery in tight reservoirs, providing a practical reference for the effective development of tight, low-permeability oil and gas reservoirs.

Keywords: tight reservoir; static imbibition; nanofluid; nuclear magnetic resonance (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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