Gel performance in rheology and profile control under low-frequency vibration: coupling application of physical and chemical EOR techniquesReportar como inadecuado




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Journal of Petroleum Exploration and Production Technology

, Volume 7, Issue 2, pp 479–486

First Online: 29 June 2016Received: 22 January 2016Accepted: 18 June 2016DOI: 10.1007-s13202-016-0267-1

Cite this article as: Zheng, L.M., Pu, C.S., Liu, J. et al. J Petrol Explor Prod Technol 2017 7: 479. doi:10.1007-s13202-016-0267-1

Abstract

Flowing gel plugging and low-frequency vibration oil extraction technology have been widely applied in low-permeability formation. High probability of overlapping in action spheres of two technologies might lead to poor operating efficiency during gel injection. Study on flowing gel rheological properties under low-frequency vibration was essential, which was carried out indoor with viscosity measurement. Potential dynamic mechanisms were analyzed for the rheological variation. Under low-frequency vibration, gel rheological properties were found to be obviously influenced, with vibration delaying gel cross-linking in induction period, causing a two-stage gel viscosity change in acceleration period, and decreasing gel strength in stable period. Surface of gel system under vibration presented different fluctuating phenomenon from initial harmonic vibrating to heterogeneous fluctuating droplet separation might appear to final harmonic vibrating again. Dynamic displacement in unconsolidated sand pack revealed that low-frequency vibration during gel injection might be a measure to achieve deep profile control, with the gel injection depth increased by 65.8 % compared with the vibration-free sample. At last, suggestions for field test were given in the paper to achieve lower injection friction and better gel plugging efficiency.

KeywordsFlowing gel Low-frequency vibration Rheological change Gel cross-linking stages Gel injection 



Autor: Li Ming Zheng - Chun Sheng Pu - Jing Liu - Bo Ma - Nasir Khan

Fuente: https://link.springer.com/







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