| 摘要: |
| CaC03是油田采出水中常见的结垢物质，NaCl是其中常见的矿物质。采用pH法研究NaCl溶液中CaCO,结垢 动力学，利用PHRQPITZ程序将实验测得的pH值-时间数据转换为钙离子浓度-时间(c(Ca2+) t)数据， 采用DJ方程来表征CaC03结垢动力学,考察了 NaCl浓度对CaC03结垢过程中的反应速率常数和反应级数的影响， 给出了反应速率常数、反应级数与体系离子强度的经验关系式。结果表明,NaCl对CaC03g垢过程起阻滞作用。 |
| 关键词: 高矿化度 油田采出水 碳酸钙 结垢动力学 |
| DOI： |
| 分类号: |
| 基金项目: |
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| CaC03 precipitation kinetics in highly mineralized oilfield produced water |
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CAO Zong-lun1,CHEN Jin-fu1,HE Shao-qun2,UU Ya1,LU Chun-xi1
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(1.Faculty of Chemistry and Chemical Engineering in China University of Petroleum， Beijing 102249，China ;2. Research Institute of Oil Production Technology in Shengli Oilfield 9SINOPEC, Dongying 257000, Shandong Province, China)
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| Abstract: |
| CaC03 is an important scale component, and NaCl is the most common mineral in oilfield produced water. CaC03 precipitation kinetics in NaCl solution was studied by pH measuring method. PHRQPITZ program was used to convert the original pH-f data to c(Ca2+ )~t data, and DJ equation was used to process experimental data. The influences of concentration of NaCl on the reaction rate constant and reaction order were revealed, and experience equations of reaction rate constant, reaction order and ionic strength were established. Experiment results show that NaCl plays retarding role in CaC03 precipitation. |
| Key words: high mineralization oilfield produced water calcium carbonate precipitation kinetics |
