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原油降凝降粘剂HC在稠油生产中的应用 总被引:2,自引:1,他引:2
本文概括介绍了原油降凝降粘剂HC的基本组成,作用原理和性能指标,详细介绍了在中原油采油三厂各类稠油生产井中投加HC的降凝降粘开采工艺,简要说明了现场应用结果。 相似文献
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在油田开发的初期和中期,油水混合物一般形成油包水型乳状液,与原油相比,油包水型乳状液的流变性恶化,不利于油田开发和管道输送。在原油乳状液中加入适当的降粘剂,可以使油包水型乳状液提前转相成为水包油型乳状液,改善乳状液的流变性,主要表现为牛顿流体性质增强,粘度或表观粘度减小,低温结构强度降低,由于原油性质不同,药剂类型不同,降粘剂对原油乳状液的影响也不同。因此,使用降粘剂时,应对药剂品种和加药量等条件进行了评选。 相似文献
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原油降凝降粘剂在原油开采的集输中的应用 总被引:4,自引:0,他引:4
BEM系列降凝剂和ORV系列油基降粘剂及HEA系列水基降粘剂对原油具有较好的改性效果,分别适用于高原油和低粘同及高稠洞的开采和集输中的介绍了它们在原油开采和集输过程中的应用效果及取得的经济效益。 相似文献
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降粘剂对原油乳状液转相的影响 总被引:6,自引:2,他引:6
原油乳状液的转相,即由泡包水型变为水包油,受多种因素的影响,本文讨论降粘剂的影响。在油包水型原油乳状液中加入一定量降粘剂,可使转相的含水率由60%-75%降低到10%-40%,粘度大幅度降低,流变性改善。降粘剂的加量增大,则转相时含水率降低的幅度增大。 相似文献
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HG系列降粘剂对宁一联原油乳状液流变性的影响 总被引:3,自引:1,他引:2
研究了HG系列降粘剂对不同含水率的华北油田宁一联原油乳状液流变性的影响。HG系列降粘剂为华北油田常用降粘剂,其主剂为多乙烯多胺起始的嵌段聚醚表面活性剂。研究结果表明,在含水率10%-60%的宁一联原油乳状液中加入HG降粘剂民状液流变行为指数n增大,稠度系数k减少,粘度降低,低温屈服值减小,凝点降低,转相点降低;降粘剂对不含水原油和含水率≤10%的原油乳状液无效;降粘剂的效果随含水率增大而增大。对于 相似文献
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J—50油井破乳降粘剂在原油生产集输中应用效果分析 总被引:6,自引:1,他引:5
采用在井口投加 J-50油井破乳降粘剂的工艺,在油井、接转站和集中处理站均取得了显著的降阻、脱水效果。文中着重讨论了 J-50油井破乳降粘剂的加入浓度与原油破乳脱水率、脱出水含油率的关系,并分析了现场应用效果。 相似文献
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几种原油降凝降粘剂作用机理的红外光谱和X射线衍射研究 总被引:28,自引:5,他引:28
详细研究了从大庆、江汉、冀东原油分离出的石蜡、胶、沥青质用降凝降粘剂处理后红外特征吸收峰和X射线衍射峰的变化。由红外数据证实,降凝剂分子与石蜡分子发生共晶是原油降凝作用的主要机理。由红外和X射线衍射数据得出结论;降粘剂破坏胶质、沥青质分子平面重叠的聚集体,使聚集结构变疏松,聚集有序性降低,是原油降粘作用的机理。 相似文献
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Based on the theory that viscous crude oil can form stable two-phase oil-water interfacial molecular membrane with surfactant, the oil-water interfacial activity and viscosity reduction of oil-water interface of viscous crude oil were studied for the ternary compound system, including anionic surfactant alpha olefin sulfonate (AOS), weak alkali Na2CO3 and four different kinds of nonionic surfactant emulsifying silicon oil (LKR-1023), lauryl diethanolamide (LDEA), isomeric alcohol ethoxylates (E-1306), and polyoxyethylene sorbitan monooleate (T-80). Results showed when lipophilic or hydrophilic nonionic surfactants were used separately in the same compound system. The viscosity of viscous crude oil could be reduced, but the viscosity reduction efficacy was not desirable. However, using LKR-1023, E-1306, and T-80 as nonionic surfactant with mass fraction 1.0%, the viscosity reduction rate of viscous crude oil reaches 98.92%, 98.29%, and 96.87%, respectively. With 1.4% of LDEA, the viscosity reduction rate of viscous crude oil can reach 98.89%. Through all different kinds of the nonionic surfactant tested, oil-in-water (O/W) emulsion under LDEA ternary compound system has been proved to be the most stable with no phase inversion. Therefore, it is promising to improve the viscosity reduction of the super viscous crude oil by selecting the proper surfactant and dosage. 相似文献
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稠油降黏冷采是一种重要的稠油开采方式,研究合成了两亲性聚合物降黏剂L–A,并利用乌氏黏度仪、电导率仪等对L–A剂进行性能评价,与非离子型降黏剂烷基酚聚氧乙烯醚OP–10和吐温–80、阴离子型降黏剂石油磺酸盐(WPS)和烷基硫酸钠(SDS)相比,L–A剂耐温降黏效果良好,耐温120℃.室内物模驱油实验结果表明,相比单一水... 相似文献
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针对目前油溶性稠油降粘剂存在的选择性强和降粘效果差等问题,研制了一种油溶性枝型稠油降粘剂,该降粘剂分子结构中含有极性基团和烷基。极性基团可以降低稠油中胶质和沥青质的氢键作用,烷基可以增加油溶性枝型稠油降粘剂的溶解能力,从而提高其降粘效果。油溶性枝型稠油降粘剂通过2步法合成得到,通过对其合成条件的讨论发现,该油溶性枝型稠油降粘剂的最佳合成条件为:乙二醇、环氧氯丙烷和十八酰氯的摩尔分数之比为4∶4∶1.5;第1步主链反应温度为110℃,反应时间为8h,促进剂N的质量分数为1.4%;第2步接枝反应温度为110℃,反应时间为14h。研制的油溶性枝型稠油降粘剂降粘率可达49%;红外光谱对其结构的表征结果显示,其结构与设计结构一致。 相似文献
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E.J. Suárez-Domínguez J.F. Pérez-Sánchez A. Palacio-Pérez A. Rodríguez-Valdes E. Izquierdo-Kulich S. González-Santana 《Petroleum Science and Technology》2018,36(2):166-172
Considering that high viscosity of extra-heavy crudes is related to the formation of a dispersed phase of asphaltenes, a dynamic interaction model is proposed which explains the mechanism to achieve viscosity reduction based on the molecular interacting energies between the ester active principle of a viscosity bio-reducer and the asphaltene fraction of crude oil. A qualitative comparison is made between the theoretical and experimental results observed in relation to the rheological behavior of Mexican extra-heavy crudes in the presence of the enhancer. Both, theoretical and experimental data, described a decrease in the asphaltenes dispersed fraction in relation to the ester concentration mainly because of polarity in asphaltenic crudes. 相似文献
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To reduce the viscosity of highly-viscous oil of the Tahe oilfield (Xinjiang, China), an oilsoluble polybasic copolymer viscosity
reducer for heavy oil was synthesized using the orthogonal method. The optimum reaction conditions are obtained as follows:
under the protection of nitrogen, a reaction time of 9 h, monomer mole ratio of reaction materials of 3:2:2 (The monomers
are 2-propenoic acid, docosyl ester, maleic anhydride and styrene, respectively), initiator amount of 0.8% (mass percent of
the sum of all the monomers) and reaction temperature of 80 °C. This synthesized viscosity reducer is more effective than
commercial viscosity reducers. The rate of viscosity reduction reached 95.5% at 50 °C. Infrared spectra (IR) and interfacial
tensions of heavy oil with and without viscosity reducer were investigated to understand the viscosity reduction mechanism.
When viscosity reducer is added, the molecules of the viscosity reducer are inserted amongst the molecules of crude oil, altering
the original intermolecular structure of crude oil and weakening its ability to form hydrogen bonds with hydroxyl or carboxyl
groups, so the viscosity of crude oil is reduced. Field tests of the newly developed oil-soluble viscosity reducer was carried
out in the Tahe Oilfield, and the results showed that 44.5% less light oil was needed to dilute the heavy oil to achieve the
needed viscosity. 相似文献
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SK-6型高效稠油降粘剂性能评价及现场应用 总被引:1,自引:0,他引:1
稠油、超稠油油藏进入多轮次吞吐后期普遍存在蒸汽驱替效率低、油汽比低、经济效益差的问题。部分区块由于注汽压力高而导致无法正常注汽。室内实验研究表明,伴蒸汽注入SK—6型高效稠油降粘剂可以明显地降低注汽压力,提高注汽周期的产量及油汽比,提高蒸汽的驱替效率。该项技术应用于单家寺油田取得了良好的经济效益,为提高该类油田的开发效果及经济效益提供了新的途径。 相似文献
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本文主要以在役原油储罐的在线检测技术应用现状为重点进行阐述,结合当下在役原油储罐的检测工作开展情况为依据,首先分析储罐检测概述,其次从声发射检测技术、超声导波检测技术、机器人检测技术几个方面深入说明并探讨在役原油储罐的在线检测技术,最后阐述在役原油储罐的在线检测技术发展,进一步指明在役原油储罐的在线检测发展方向,旨在为相关研究提供参考资料。 相似文献
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为系统研究降黏剂驱这一新的开发方式提高采收率机理,应用单管填砂驱油模型、三维填砂驱油模型和微观玻璃刻蚀驱油模型,测试降黏剂驱的驱油效率和波及系数,并对其原因进行分析。实验结果表明,降黏剂驱通过提高驱油效率和增加波及系数提高采收率。与水驱相比,降黏剂驱可提高驱油效率13%,其机理为:①分散乳化,形成水包油的小油滴,有利于通过狭窄的喉道,降低原油的表观黏度;②降低界面张力,增加毛管数,降低残余油饱和度。同时,降黏剂驱将波及系数由水驱时18.8%提高到39.9%,其机理为:①乳液调驱,分散乳化的原油进入水窜通道,水渗流面积减小、阻力增加,后续注入液进入以前未波及区域;②贾敏效应,降黏乳化小油滴聚并成大油滴堵在孔喉处,周围驱替液转向。研究明晰了降黏剂驱提高采收率机理,为后续开发技术界限研究及现场应用奠定基础。 相似文献