英台油田英东区块清防蜡技术研究

发布时间：2018-04-10 01:12

本文选题：结蜡周期　切入点：机械清蜡　出处：《东北石油大学》2015年硕士论文

【摘要】：在原油被采出的过程中,油井结蜡是造成油井非正常生产的一个重要因素。由于英东区块产出原油粘度高,凝点高,油井洗井周期短,经常出现蜡卡、凝油卡等状况。因此,在统计英东区块结蜡周期基础上,通过气相色谱分析来了解原油蜡组分分布,对该区块原油族组成进行了测定与分析;通过室内实验,确定了该区块原油的凝点;同时对蒸汽洗井清蜡、机械清蜡、化学清蜡方法的优缺点进行分析。在充分调研油井清防蜡技术的基础上,通过室内试验,确定出可以延长结蜡周期的方法,解决油井蜡卡,凝油卡等问题本文通过分析英台油田英东四个区块原油物性、蜡的晶体结构以及析蜡特性参数等,总结出了其对油井结蜡程度的影响。通过对高分子型清防蜡剂的评价与筛选,可知,从降凝效果上来看清防蜡剂E适用于101区块油井,清防蜡剂(药剂A:煤油=1:1)适用于高台子区块油井,清防蜡剂(药剂E:异丙醇=2:1)适用于101-148区块油井,清防蜡剂E适合于162区块油井。从石蜡抑制效果上来看药剂F对英东四个区块油井都适用。从防蜡率效果来看,E型清防蜡剂的防蜡率最高。并进行了现场试验,结蜡周期得到了明显的延长,取得了较好的效果。
[Abstract]:In the process of crude oil recovery, oil well wax deposit is an important factor in the abnormal production of oil well.Due to the high viscosity of produced crude oil, high freezing point, short well washing period, wax card and condensing oil card are often found in Yingdong block.Therefore, on the basis of statistics of wax deposition period in Yingdong block, the distribution of crude oil wax components is understood by gas chromatographic analysis, the composition of crude oil group in this block is determined and analyzed, and the freezing point of crude oil in this block is determined by laboratory experiments.At the same time, the advantages and disadvantages of steam washing well cleaning, mechanical wax cleaning and chemical wax cleaning are analyzed.On the basis of full investigation of wax-cleaning and anti-paraffin technology in oil wells, through laboratory tests, a method can be determined to prolong the waxing period and solve the problems of oil well wax card and condensing oil card. In this paper, by analyzing the physical properties of crude oil in the four blocks of Yingtai Oilfield,The effect of crystal structure and waxing characteristic parameters on the wax deposition degree of oil well is summarized.According to the evaluation and screening of polymer wax cleaning agent, it can be seen that the antiwaxing agent E is suitable for oil wells in block 101 from the point of view of its anticoagulant effect, and the wax cleaning agent (agent A: kerosene 1: 1: 1) is suitable for oil wells in Gaotaizi block.Wax remover (E: isopropanol 2: 1) is applicable to block 101-148 wells and anti-wax agent E to block 162 wells.From the effect of paraffin inhibition, agent F is applicable to the wells in the four blocks of Yingdong.According to the effect of wax control, the wax control rate of E-type wax-clearing agent is the highest.The field test shows that the waxing period is obviously prolonged and good results are obtained.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358.2

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