高矿化度油田采出水中的碳酸钙结垢动力学  

CaCO_3 precipitation kinetics in highly mineralized oilfield produced water

作　　者：曹宗仑[1] 陈进富[1] 何绍群[2] 刘亚[1] 卢春喜[1] 

机构地区：[1]中国石油大学化学科学与工程学院,北京102249 [2]中石化胜利油田分公司采油工艺研究院,山东东营257000

出　　处：《中国石油大学学报（自然科学版）》2008年第4期132-135,共4页Journal of China University of Petroleum(Edition of Natural Science)

摘　　要：CaCO3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CaCO3结垢动力学,利用PHRQPITZ程序将实验测得的pH值-时间(pH^t)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CaCO3结垢动力学,考察了NaCl浓度对CaCO3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CaCO3结垢过程起阻滞作用。CaCO3 is an important scale component, and NaCl is the most common mineral in oilfield produced water, CaCO3 precipitation kinetics in NaCl solution was studied by pH measuring method, PHRQPITZ program was used to convert the original pH-t 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 CaCO3 precipitation.

关 键 词：高矿化度 油田采出水 碳酸钙 结垢动力学 

分 类 号：TE133.1[石油与天然气工程—油气勘探]