长庆油田某作业区集输系统结垢机理与防控措施研究
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摘要
目的解决长庆油田某作业区集输系统的结垢问题。方法采用离子色谱仪等仪器对水样的理化性质进行测试分析,采用X射线衍射仪对现场垢样进行成分分析,通过室内静态结垢实验结合滴定法,研究油井采出液混合的配伍性,并对阻垢剂进行筛选及评价。结果长庆油田某作业区集输系统结垢的主要原因为该区C6和Y9两个层系的采出液不配伍,主要结锶钡垢,且结垢量较大。温度对总结垢量的影响较小,但随着两种水样的质量比接近1︰1时,结垢量达到最大。选择加注C型阻垢剂,且加注质量浓度为90 mg/L时,阻垢率可达86.1%,比原方案提高30%左右,阻垢后最大结垢量由1678 mg/L降为233 mg/L。结论现场提供的C型阻垢剂对长庆油田某作业区集输系统具有适用性,阻垢率高,能够有效减缓现场结垢问题。
Objective To solve the scaling problem of the gathering and transportation system in an operation area of Changqing Oilfield. Methods The physical and chemical properties of the water sample were tested and analyzed with instruments such as ion chromatography; the X-ray diffraction instrument was used to analyze the composition of the on-site scale samples; the compatibility between two kinds of oil well produced liquid was studied by indoor static scaling experiment combined with titration method; and also, the scaling inhibitors were filtered and evaluated. Results The main reason for the scaling of the gathering and transportation system in an operation area of Changqing Oilfield was that the produced liquid of C6 and Y9 layers in this area was incompatible. The main reason was strontium and barium scaling. And the amount of scaling was large.The temperature had little effect on the total scale amount; however, as the proportion of the two water samples was close to 1:1,the scaling amount reached the maximum. When C scale inhibitor was added and the concentration was 90 mg/L, the scale inhibition rate could reach 86.1%, which was about 30% higher than that of the original scheme. The maximum scale formation amount could be reduced from 1678 mg/L to 233 mg/L after scale inhibition. Conclusion The C scale inhibitor supplied at site is applicable to the gathering and transportation system in an operation area of Changqing Oilfield. It has high scale inhibition rate,and can effectively slow down the scaling problem in the field.
Objective To solve the scaling problem of the gathering and transportation system in an operation area of Changqing Oilfield. Methods The physical and chemical properties of the water sample were tested and analyzed with instruments such as ion chromatography; the X-ray diffraction instrument was used to analyze the composition of the on-site scale samples; the compatibility between two kinds of oil well produced liquid was studied by indoor static scaling experiment combined with titration method; and also, the scaling inhibitors were filtered and evaluated. Results The main reason for the scaling of the gathering and transportation system in an operation area of Changqing Oilfield was that the produced liquid of C6 and Y9 layers in this area was incompatible. The main reason was strontium and barium scaling. And the amount of scaling was large.The temperature had little effect on the total scale amount; however, as the proportion of the two water samples was close to 1:1,the scaling amount reached the maximum. When C scale inhibitor was added and the concentration was 90 mg/L, the scale inhibition rate could reach 86.1%, which was about 30% higher than that of the original scheme. The maximum scale formation amount could be reduced from 1678 mg/L to 233 mg/L after scale inhibition. Conclusion The C scale inhibitor supplied at site is applicable to the gathering and transportation system in an operation area of Changqing Oilfield. It has high scale inhibition rate,and can effectively slow down the scaling problem in the field.
引文
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[15]刘清云,吾买尔江,熊新民,等.塔里木油田缓蚀阻垢剂质量控制标准研究[J].中国石油和化工标准与质量,2011, 31(7):146-147.
[2]何治武,张振云,杨全安,等.华庆油田一套井网两层开发水质配伍性与阻垢技术研究[J].当代化工,2011,40(9):949-951.
[3]吴清红,王颖.油田水结垢腐蚀机理及对策研究[J].当代化工, 2016, 45(8):1827-1830.
[4]曹嘉斌,苟颖琦.油田注水用化学阻垢剂及化学杀菌剂研究[J].当代化工, 2017, 46(5):886-889.
[5]周本省.循环冷却水系统中控制水垢的化学方法[J].化工机械, 1999, 26(3):179-181.
[6]豆广瑞.油田井筒结垢原因分析及防阻垢技术探讨[J].中小企业管理与科技, 2012(7):237-238.
[7]孙溢翔.管道结垢机理及影响因素分析[J].云南化工,2017, 44(12):52-54.
[8]黄晶,罗戏雨,陈元虎.油田注水结垢及阻垢剂研究进展[J].当代化工, 2019, 48(1):183-186.
[9]何俊,赵宗泽,李跃华.物理方法除垢阻垢技术的研究现状及进展[J].工业水处理, 2010, 30(9):5-9.
[10]王明军,李春福,胡文涛.油田水平井合金防垢器研制与效果评价[J].装备环境工程, 2016(3):151-155.
[11]吴群明.阻垢剂对碳酸钙垢的抑制机理[J].福建轻纺,2006(8):4-7.
[12]张锐,王姣龙.绿色阻垢剂的最新研究进展[J].工业用水与废水, 2015, 46(6):6-8.
[13]刘丽娟,赵希林,刘继宁,等.水处理阻垢剂作用机理研究进展[J].广东化工, 2015, 42(1):68-69.
[14]孙哲,赵兴国,李资收,等.曲堤油田结垢机理研究与防治[J].装备环境工程, 2018, 15(8):24-28.
[15]刘清云,吾买尔江,熊新民,等.塔里木油田缓蚀阻垢剂质量控制标准研究[J].中国石油和化工标准与质量,2011, 31(7):146-147.