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| 1 | Necessity and feasibility of improving the residual resistance factor of polymer flooding in heavy oil reservoirs显示文摘The efficiency of water flooding in heavy oil reservoirs would be improved by increasing the viscosity of the displacing phase, but the sweep efficiency is not of significance due to the low mobility of the vicious oil. On the basis of mobility control theory, increasing the residual resistance factor not only reduces the water-oil mobility ratio but also decreases the requirement for viscosity enhancement of the polymer solution. The residual resistance factor caused by hydrophobic associating polymer solution is higher than that caused by polyacrylamide solution in brine containing high concentrations of calcium and magnesium ions. The results of numerical simulations show that the polymer flooding efficiency improved by increasing the residual resistance factor is far better than that by only increasing solution viscosity. The recovery factor of heavy oil reservoirs (70 mPa·s) can be enhanced by hydrophobic associating polymer solution of high residual resistance factor (more than 3) and high effective viscosity (24 mPa·s). Therefore, increasing the residual resistance factor of the polymer solution not only decreases the requirement for the viscosity of polymer solution injected into heavy oil reservoirs but also is favorable to enhanced oil recovery during polymer flooding. | Shi Leiting Ye Zhongbin Zhang Zhuo Zhou Changjiang Zhu Shanshan Guo Zhidong | 2010 | Petroleum Science2010，7，2： | 16 |
| 2 | Effect of polymer solution structure on displacement efficiency显示文摘In this paper, a series of experiments, including atomic force microscope (AFM), environmental scanning electron microscope (ESEM), and core displacement tests were conducted to investigate the effect of polymer solution structure on solution properties and oil displacement efficiency. The results show that in the HPAM solution polymer coils were formed and then aggregated into a loose structure, while the HAP2010 solution formed a strong network structure, which would significantly improve the solution viscosity and flow resistance so as to upgrade the capacity of piston-like oil displacement in highly permeable porous media. Meanwhile, the retention of the HAP2010 solution at pore throats were also enhanced, which could reduce water production during subsequent water flooding and enlarge the swept volume during polymer flooding. Therefore, enhancing the interaction among polymer molecules is an effective way to improve the displacement efficiency of polymer solutions in heavy oil reservoirs with high permeability. | Shi Leiting Chen Lei Ye Zhongbin Zhou Wei Zhang Jian Yang Jie Jin Jianbo | 2012 | Petroleum Science2012，9，2： | 9 |
| 3 | Attempted validation of the scores of the VARK learning styles inventory with multitrait-multimethod confirmatory factor analysis mo- dels显示文摘 | Leite W L Svinicki M Shi Y | 2010 | Educ Psyehol Meas2010，70，2： | 1 |
| 4 | MicroRNA-9 and mieroRNA-326 regulate human doparnine D2 receptor expression, and the microRNA- mediated expression regulation is altered by a genetic variant 显示文摘 | Shi S Leites C He D | 2014 | J Biol Chem2014，289，13： | 1 |
| 5 | Ultraviolet light A irradiation induces immunosuppression associated with the generation of reactive oxygen species in human neutrophils显示文摘Ultraviolet blood irradiation has been used as a physical therapy to treat many nonspeci¯c diseases in clinics;however,the underlying mechanisms remain largely unclear.Neutrophils,the first line of host defense,play a crucial role in a variety of in°ammatory responses.In the present work,we investigated the effects of ultraviolet light A(UVA)on the immune functions of human neutrophils at the single-cell level by using an inverted°uorescence microscope.N-Formylmethionyl-leucyl-phenylalanine(FMLP),a classic physiological chemotactic peptide,was used to induce a series of immune responses in neutrophils in vitro.FMLP-induced calcium mobilization,migration,and phagocytosis in human neutrophils was significantly blocked after treatment with 365 nm UVA irradiation,demonstrating the immunosuppressive effects of UVA irradiation on neutrophils.Similar responses were also observed when the cells were pretreated with H2O2,a type of reactive oxygen species(ROS).Furthermore,UVA irradiation resulted in an increase in NAD(P)H,a member of host oxidative stress in cells.Taken together,our data indicate that UVA irradiation results in immunosuppression associated with the production of ROS in human neutrophils. | Cunbo Li Xuechen Shi Mincai Chen Guangxue Xu Xinglei Su Pengchong Jiang Leiting Pan | 2016 | Journal of Innovative Optical Health Sciences2016，9，1： | 0 |
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