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.
作者
成杰
张小龙
崔熙
李自力
CHENG Jie;ZHANG Xiao-long;CUI Xi;LI Zi-li(Xi'an Changqing Technology Engineering Co.,Ltd,Xi'an 710018,China;Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety,China University of Petroleum (East China),Qingdao 266580,China)
出处
《装备环境工程》
CAS
2019年第7期76-81,共6页
Equipment Environmental Engineering
关键词
结垢机理
配伍性
阻垢剂
scaling mechanism
compatibility
scale inhibitor
