Experimental Study of Forced Imbibition in Tight Reservoirs Based on Nuclear Magnetic Resonance under High-Pressure Conditions

Xiaoshan Li, Liu Yang (), Dezhi Sun, Bingjian Ling and Suling Wang
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Xiaoshan Li: Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China
Liu Yang: State Key Laboratory for Tunnel Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Dezhi Sun: China Railway Tianjin Metro, Tianjin 300450, China
Bingjian Ling: China Railway Tianjin Metro, Tianjin 300450, China
Suling Wang: School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China

Energies, 2024, vol. 17, issue 12, 1-18

Abstract: This study utilizes nuclear magnetic resonance (NMR) techniques to monitor complex microstructures and fluid transport, systematically examining fluid distribution and migration during pressure imbibition. The results indicate that increased applied pressure primarily affects micropores and small pores during the initial imbibition stage, enhancing the overall imbibition rate and oil recovery. Higher capillary pressure in the pores strengthens the imbibition ability, with water initially displacing oil from smaller pores. Natural microfractures allow water to preferentially enter and displace oil, thereby reducing oil recovery from these pores. Additionally, clay minerals may induce fracture expansion, facilitating oil flow into the expanding space. This study provides new insights into fluid distribution and migration during pressure imbibition, offering implications for improved oil production in tight reservoirs.

Keywords: applied pressure; imbibition; nuclear magnetic resonance; tight oil reservoir (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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