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- 저자 : Bobo Zhou (검색결과 2 건)
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Wanli Kang,Haizhuang Jiang,Hongbin Yang,Zhe Li,Bobo Zhou,Yingqi He,Bauyrzhan Sarsenbekuly,Maratbek Gabdullin 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
CO2 flooding has been widely applied in lots of low permeability reservoirs. After extensive CO2 injection,some reservoirs began to show serious gas channeling problems. CO2 foam had been successfully used tosolve gas channeling problems due to its advantages of water selective plugging features (not pluggingoil). In this paper, a novel CO2 foam system was developed for high temperature and high salinity(HTHS)(85 ℃, 60,000 mg/L) aiming at solving the gas channeling in Changqing Oilfield. Taking the foam half-lifeas the evaluation standard, the optimum foam system (0.5 wt% EC-1 + 1 wt% SiO2) for the target reservoirwas determined. The influences of temperature, salinity and pressure on the CO2 foam performance werestudied by high temperature and high pressure(HTHP)method. The ability and mechanism of anti-gaschanneling were studied by experiments of sand packed tube and microscopic displacement,respectively. The results showed that the foam system possessed good foam properties at HTHS withpressure. As the concentration of SiO2 nanoparticles increased, the resistance factor of the foam systemincreased. However, temperature showed an adverse effect on foam stability, the resistance factordecreased with the increase of temperature. The Jamin superposition and emulsion plugging mechanismof foam system was revealed by microscopic displacement experiments.
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Hongbin Yang,Shuo Shao,Tongyu Zhu,Chaocheng Zhao,Shuren Liu,Bobo Zhou,Xiaoyu Hou,Yang Zhang,Wanli Kang 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-
Low elastic polymer microsphere (L-EPM) has been proposed as a functional polymer microsphere theseyears. L-EMP has the excellent deformation ability in the porous medium due to the low storage modulus. Herein, one kind of L-EPM with storage modulus (G0) of 23.6 Pa was prepared by inverse suspensionpolymerization. The shear resistance of L-EPM was researched by using coreflooding experiment andhigh shear rate emulsifier. The conformance control behavior of L-EPM was investigated by using doubleparallel sandpackflooding experiment. The results showed that L-EPM was a kind of swollen particle gelwith three-dimensional net structure and contained amide, carboxyl, and sulfonate groups. Themechanism of water swelling property was mainly due to the formation of hydrogen bonds, hydrolysis ofhydrophilic groups and the diffusion caused by osmotic pressure difference. Compared with high elasticpolymer microspheres (H-EPM) and low elastic preformed particle gel (L-PPG), L-EPM had better shearresistance in the porous medium and the well casing perforation. In addition, the critical shear points ofL-EPM was proposed in this work. Due to the better shear resistance and deformation ability, theconformance control behavior of L-EPM showed that L-EPM was a promising conformance control agentin the heterogeneous reservoirs.
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