The study of a highly efficient and environment-friendly scale inhibitor for calcium carbonate scale in oil fields

查看全文 作　　者：Heng [1]Wang;Junying [1,2]Hu;Zhi [3]Yang;Zebin [1]Yin;Qi [1]Xiong;Xiankang [1,2]Zhong

机构地区：[1]School of Oil and Natural Gas Engineering,Southwest Petroleum University,Chengdu,610500,China;[2]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,610500,China;[3]School of Materials Science and Engineering,Xihua University,Chengdu,610039,Sichuan,China

出　　处：《Petroleum》索引2021年第7卷第3期,共10页

基　　金：by 111 Project[D18016];Application and Fundamental Research of Sichuan Province[grant number 2017JY0171];Scientific and Technological Innovation Team for the Safety of Petroleum Tubular Goods in Southwest Petroleum University[grant number 2018CXTD01]。 摘　　要：A highly efficient and environment-friendly scale inhibitor(MA-VA-VS)was synthesized via free radical solution polymerization method,where maleic anhydride(MA),vinyl acetate(VA)and vinyl sulfonate(VS)acted as monomers,while ammonium persulfate was used as initiator.The inhibition performance and the structure as well as properties was characterized using static jar measurement and dynamic test,Fourier transform infrared spectroscopy and thermogravimetric analysis.The surface morphology and composition of scale formed in the solution were examined using scanning electron microscopy and Xray diffraction,respectively.The binding energies of inhibitor with calcite(104)face were calculated using Materials Studio 2017(MS)at 323 K.The results show that the inhibition efficiency gradually increases with increasing inhibitor concentration.While as the Ca2þconcentration increases,the efficiency first increases and then decreases.With the increase in temperature or pH,the efficiency generally decreases.It is confirmed that the inhibition efficiency can reach 91.4%when 150 mg/L MA-VA-VS is used in a flow condition.Both the calculated binding energy and inhibition performance evaluation results demonstrate that the scale inhibition performance of MA-VA-VS is better than a commercial scale inhibitor(HPMA).The excellent inhibition performance of this inhibitor is due to its chelation and dispersion properties. 关键词：COPOLYMER Scale inhibitor Calcium carbonate

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The study of a highly efficient and environment-friendly scale inhibitor for calcium carbonate scale in oil fields

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