【作者】 王本哲；

【导师】 王业飞；

【作者基本信息】 中国石油大学 ， 油气田开发工程， 2007， 硕士

【摘要】 随着油田开发,油井含水率不断上升,油井腐蚀越来越严重,解决油井腐蚀的问题越来越迫切。本文提出了一种新的油井缓蚀剂地层放置技术,即油井缓蚀剂的化学吞吐技术,它是指在高含水油井中注入油井缓蚀剂,该油井缓蚀剂将优先进入油层中的高渗透层,随后注入一定量的选择性堵水剂,将缓蚀剂封存于地层的高渗透层中,当驱油的水沿高渗透层迫近油井时,它将在堵水剂前带着封存的缓蚀剂缓慢产出,达到较长时间内减缓油井腐蚀的目的。用失重法和电化学法对市面上效果较好的油井缓蚀剂进行了评价,优选出了缓蚀效果最好的缓蚀剂BS-X。用两相滴定法检测了该缓蚀剂的有效浓度,并考察了它的高温稳定性,结果表明BS-X具有较强的稳定性。对缓蚀剂化学吞吐用堵剂进行了研究,包括不同交联体系冻胶的成冻时间和稳定性,选出了不同成冻时间的堵剂配方,并研究了其它配套工作液如前置液、隔离液和过顶替液。对缓蚀剂化学吞吐进行了室内物理模拟,包括非均质平板模型和可视化模型试验。试验结果表明,被封堵后的缓蚀剂在水驱时以低浓度缓慢释放,可以达到长期减缓油井腐蚀的目的。研究了配套工艺技术,为该技术的现场实施提供了室内研究基础。更多还原

【Abstract】 As the development of oil field, water ratio increases continuously, production well corrosion becomes more and more serious, the need to resolve oil well corrosion is more and more urgent. This paper raises a new method to reduce production well corrosion, which is the huff and puff technique of corrosion inhibitor in formation. The said technique involves injecting corrosion inhibitor into high water cut production well, this corrosion inhibitor will enter high permeability zone of formation, and then selective plugging off agent is injected to block off corrosion inhibitor in high permeability zone. When the water displacing oil gets close to production well, the corrosion inhibitor will flow out for a long time attaining the aim to slow down production well corrosion. Production well corrosion inhibitor with preferable corrosion control effect in market is evaluated by weight-loss method and electrochemistry method, and then a kind of inhibitor named BS-X with the best corrosion control effect is obtained. Diphase titrate method is used to analysis the effective concentration of BS-X and its high temperature stability is investigated. The result shows that its high temperature stability is well. The block agent used for corrosion inhibitor huff and puff is studied, including gelling time and stability of different crosslink system gel, and then different gelling time composition of block agent is obtained. Other matting working fluids are also studied, including ahead fluid, isolate fluid and subsequent fluid. Corrosion inhibitor huff and puff is stimulated with physical models in laboratory, including inhomogeneous plate model and visualization models. It is shown that blocked corrosion inhibitor produces slowly with low concentration by water flood. This will fulfill the aim to slow down oil well corrosion in a long period. Matting technique is studied, providing laboratory study basis for the field conduct of this technology.更多还原