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Formation and Mitigation of BaSO4 Scale in Oil Fields Ming Zhu1, a, Chengqiang Ren1, b, Yuanyuan Meng1, c, Li Liu1, d and Yunping Zheng2, e 1School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China 2School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China azhuming_famous@163.com, bchengqiangren@163.com, c1060917317@qq.com, dliuliswpu@163.com, e138805518@qq.com Keywords: Polyepoxysuccinic acid (PESA), BaSO4 scale, Scale inhibition.
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Materials and methods General situation of the research district.
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The decrease in frequency for different rates of loading shows the loss of stiffness for all materials studied.
Although the damping of composite materials is not very high; it is significantly higher than that measured for most usual metallic materials.
Viscoelastic materials combine the capacity of an elastic type material to store energy with the capacity to dissipate energy.
The analysis derived the strain energy stored in the different materials.
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Results showed that PDADMAC with higher charge density was easier to interact with anionic trash, resulting in better removal of suspended solid materials and chemical oxygen demand(COD).
Acknowledgements This work was financially supported by Scientific Research Foundation of Tianjin University of Science & Technology(grant numbers: 20090416) and the National Natural Science Foundation of China(grant number: 31070529).
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Acknowledgements This work is supported by the National Natural Science Foundation of China (No.11132004 and No. 51078145) and Natural Science Foundation of Guangdong Province of China (No. 9251064101000016).
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The parameters of ANSYS modal analysis Type of materials Modulus of elasticity (Pa) Poisson’s ratio Density (Kg/m3) Thickness (m) Diameter (m) Si 1.31e11 0.29 2400 3.52e-4 5.08e-2 SU-8 4.4e9 0.22 1236 7.0e-5 5.08e-2 Considering to the advantages of wide frequency rang, small waveform distortion and low noise, the electric vibrator was selected for SU-8 layer VSR in this experiment.
Programs Foundation of Ministry of Education of China (NO.20120121120036), and the Natural Science Foundation of Fujian Province of China (NO.2014J05063).
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Moreover, vegetable oil-based polyols are considered to be environmentally friendly materials.
Experimental Materials.
All materials were used without further purification.
The authors also gratefully acknowledge Department of Materials Science, Faculty of Science, Chulalongkorn University for instrument support and Bangkok Foam Co.
Saravari, Processing and Properties of Palm Oil-based Rigid Polyurethane Foam, Journal of Metals, Materials and Minerals, 17 (2007), p. 17-23

Acknowledgments The work is supported by National Natural Science Foundation of China (No. 51405294), Postdoctoral Research Foundation of Shanghai Jiao Tong University (14X100030001), China Postdoctoral Science Foundation (2014M560331) and Important National Science & Technology Specific Projects (2015ZX04002102 & 2012ZX04012021).
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