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Citation: HUANG Man, LI Meirong, TIAN lanlan, HUANG Yin, MA Baodong, LIU Kun. Effect of Ferrous Ion on Reducing the Viscosity of Oil Flooding Polymer Solution and Its Mechanism[J]. Chinese Journal of Applied Chemistry, ;2013, 30(12): 1399-1403. doi: 10.3724/SP.J.1095.2013.30169 shu

Effect of Ferrous Ion on Reducing the Viscosity of Oil Flooding Polymer Solution and Its Mechanism

HUANG Man ^a, ,
LI Meirong ^a ,
TIAN lanlan ^a ,
HUANG Yin ^a ,
MA Baodong ^b ,
LIU Kun ^b

a. College of Science, China University of Petroleum, Qingdao 266580, China;
b. Geological Scientific Research Institute Shengli Oilfield, SINOPEC, Dongying 257015, China

Received Date: 9 April 2013
Revised Date: 30 May 2013

The viscosity of prepared polymer solution was increased by the precipitation of Fe²⁺ with NaOH from the sewage of the T28 district,Shengtuo oilfiled. The mechanism of reduced viscosity introduced by Fe²⁺ was studied by IR,fluorescence spectroscopy and SEM. The viscosity of polymer solution was elevated from 19.17 mPa·s to 92.50 mPa·s when treating the sewage containing 5.9 mg/L of Fe²⁺ with NaOH at pH 9. Fe²⁺ was found to split the polymer chain,weaken the association,destroy the spatial network structure of macromolecules,and lead to decreasing viscosity of the polymer solution. The precipitation of ferrous hydroxides from the polymer solution promotes the formation of compact spatial network structure of the polymer chains.
- polymer,
- ferrous ion,
- viscosity,
- mechanism
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