注水井用综合处理剂的研制及应用

发布时间：2018-04-04 08:41

本文选题：注水井　切入点：综合处理剂　出处：《北京化工大学》2015年硕士论文

【摘要】：某油田为水驱开采,原油含蜡量、粘度和凝固点均较高,在注水开采过程中,因管壁上附着有一定强度的沉积物,导致井筒堵塞,无法完成测试。针对这一问题,对堵塞的注水井进行取样分析。在此基础上,利用单因素试验法、均匀试验法和正交试验等方法筛选出了合适的清、防蜡组分和防垢组分,在适宜的乳化剂作用下得到了清防蜡效果好、阻垢能力强的综合处理剂,并在该油田进行了现场试验。本文主要的研究成果和结论有：1、通过对两个不同区块注水井管壁上的沉积物和水样进行分析,发现沉积物中主要成分为烃类化合物和矿物质,即所谓的“死油”。两种油样中烃类化合物的含蜡量均高于20%,石蜡部分的碳数分布集中于C20-C28；而水样中主要的成垢离子为Ca2+.Mg2+.Ba2+.S042-、C032-和HC03-等,易形成的水垢主要为CaC03.2、通过正交试验法得到了由9#复合溶剂、AR-36、复合EVA以及乙二醇单丁醚构成的清防蜡组分的配方。同时,发现聚环氧琥珀酸(PESA)与氨基三亚甲基磷酸(ATMP)以质量比1：2复合后对三种水样的阻垢率最高,高于99.89%；0-30与O-3复合后乳化效果最好,静置80h后的稳定性系数为72.45%。3、在乳化剂作用下不相溶的清防蜡组分和阻垢剂水溶液形成了稳定的乳状液,即综合处理剂。室内试验结果表明：该处理剂的清蜡速率为26.9mg/min,防蜡率高于56.00%,阻垢率高于98.90%,还具有一定的降粘作用,并且对注水井封隔器内部皮套筒的危害小。4、现场试验结果表明：该药剂能够很好地解决不同区块注水井因死油、结蜡及结垢导致的卡井问题,并且操作简便,价格低廉,具有很好的现场应用价值。
[Abstract]:The wax content, viscosity and solidification point of crude oil are high in a certain oil field. In the process of waterflooding, the well bore is blocked because there is a certain strength of sediment attached to the pipe wall, so it is impossible to complete the test.In order to solve this problem, sampling and analysis of plugged injection wells are carried out.On this basis, by using single factor test method, uniform test method and orthogonal test method, the suitable cleaning, anti-wax and anti-scaling components were screened out, and the effect of wax cleaning and anti-wax was obtained under the action of suitable emulsifier.The comprehensive treatment agent with strong scale inhibition ability was tested in the field.The main research results and conclusions in this paper are as follows: (1) by analyzing the sediment and water samples on the wall of water injection wells in two different blocks, it is found that the main components in the sediments are hydrocarbon compounds and minerals, that is, the so-called "dead oil".The wax content of hydrocarbon compounds in both oil samples was higher than 20, and the carbon number of paraffin was mainly distributed in C20-C28.The main scaling ions in water samples were Ca2. Mg2. Ba2. S042-C032- and HC03-, etc.The easily formed scale is mainly CaC03.2. By orthogonal test, the formula of wax cleaning and preventing component composed of 9# compound solvent, AR-36, composite EVA and ethylene glycol monobutyl ether has been obtained.At the same time, it was found that when the mass ratio of PESA and ATMP) was 1:2, the scale inhibition rate of the three kinds of water samples was the highest, and the emulsifying effect was the best when the mixture of PESA and O-3 was higher than 99.890-30 and O-3.The stability coefficient of 80 h was 72.45%. The stable emulsion, I. e., the comprehensive treatment agent, was formed by the insoluble wax cleaning component and the scale inhibitor solution under the action of emulsifier.The results of laboratory test show that the wax removal rate of the agent is 26.9 mg / min, the wax prevention rate is higher than 56.00 and the scale inhibition rate is higher than 98.90.The field test results show that the medicament can solve well the problems caused by dead oil, wax and scaling in water injection wells in different blocks, and the operation is simple and the price is low.Has very good field application value.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.62

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