Research on polymer solution rheology in polymer flooding for Qikou reservoirs in a Bohai Bay oilfield

• DOI: 10.1007/s13202-018-0515-7
• Publication Date: 2018-07-13T06:46:49Z
• Authors: Leilei Tie; Meng Yu; Xiang Li; Wenhui Liu; Bo Zhang; Zhen Chang; Yufei Zheng
• Keywords: Linear polymer; QE420-499; 01 natural sciences; 6. Clean water; Propagation properties; Rheological properties; Petroleum refining. Petroleum products; Polymer–surfactant hydrophobically associating polyacrylamide; TP690-692.5; Profile control; Petrology; 0105 earth and related environmental sciences

This study explored the potential applications of three newly modified polymers [a linear polymer, a hydrophobic association partially hydrolyzed polyacrylamide (HAHPAM), and polymer–surfactant] as flooding agents in specific oilfield. Rheological measurements were performed to examine rheological performances under reservoir conditions. Their stability, viscoelasticity, propagation properties analyzed simulated Propagation performance analyses conducted sandpack model behavior porous media. The results showed that HAHPAM polymer–surfactant exhibited high viscosity at low shear rates (deep reservoir), all acceptable with good injectivity (near wellbore area). In oscillatory deformation tests, predominantly elastic behavior. polymer could propagate well media, whereas poor finding contrasted tests which was superior, rates. provided insights either into matching viscoelastic or upon analyzing suitability for throughout whole process "from propagation" considerations.