稠油热采防乳增效剂的合成及评价

发布时间：2018-05-16 20:14

本文选题：稠油 + 热采　；参考：《东北石油大学》2017年硕士论文

【摘要】：渤海油区位于中国东部的渤海湾盆地,北连辽河油区,西接冀东、大港油区,南邻胜利油区。近7年来,在渤海油区共发现16个大中型油田、23亿m3石油地质储量,是我国同期发现石油储量最多的地区。迄今为止,渤海共发现36亿m3石油地质储量,其中85%为稠油。稠油热采作为稠油开采的主要手段,在注热过程中蒸汽冷凝水与地层原油相接触后极易形成油包水乳状液从而造成油流孔道堵塞,同时加大了稠油的开采难度。因此需要开展稠油热采防乳技术研究。本文针对稠油热采的问题结合渤海区块稠油性质合成了一种新型的稠油热采防乳增效剂,它可以有效地降低油水界面膜的表面活性,从而抑制乳状液的形成,降低体系的粘度,从而提高采收率。本文从稠油性质入手合成了三种防乳增效剂单剂,并最终复配出效果优异的防乳增效剂。并对产品的性能影响因素、工作性能、耐温性能进行了评价,该产品在使用浓度为1%时对含水30%的原油防乳率可达到80%以上、降粘率达到65%,蒸汽伴注驱油效果实验表明与蒸汽伴注药剂比单纯蒸汽驱油其可提高采收率近20%。论文最后对防乳增效剂的作用机理进行了分析。研究表明,防乳增效剂其分子活性高、扩散能力强,可以快速吸附在油水界面从而取代胶质、沥青质分子,这是防止形成乳状液的主要因素。
[Abstract]:The Bohai oil area is located in the Bohai Bay basin in eastern China, Liaohe oil area in the north, Jidong oil area in the west, Dagang oil area in the west, Shengli oil area in the south. In the last seven years, 16 large and medium oil fields with 2.3 billion m3 petroleum reserves have been found in Bohai oil region, which is the region with the most oil reserves discovered in the same period in China. Up to now, 3.6 billion m ~ 3 petroleum reserves have been found in Bohai Sea, of which 85% are heavy oil. Thermal recovery of heavy oil, as the main means of heavy oil production, is easy to form water-in-oil emulsion after steam condensate contact with formation crude oil during heat injection process, which results in blockage of oil flow channel, and increases the difficulty of heavy oil recovery at the same time. Therefore, it is necessary to study the emulsion prevention technology for thermal recovery of heavy oil. In this paper, a new anti-emulsion synergist for thermal recovery of heavy oil is synthesized according to the characteristics of heavy oil in Bohai block. It can effectively reduce the surface activity of oil-water interfacial membrane, thus inhibit the formation of emulsion and reduce the viscosity of the system. Thus, the oil recovery can be improved. In this paper, three kinds of anti-emulsion synergist were synthesized from the properties of heavy oil, and finally the anti-emulsion synergist with excellent effect was prepared. The factors affecting the performance, working performance and temperature resistance of the product are evaluated. When the concentration of the product is 1, the anti-emulsion rate of the crude oil with 30% water content can reach more than 80%. The viscosity reduction rate is up to 65%, and the experimental results show that the oil recovery can be increased by nearly 20% compared with the steam tracing agent. Finally, the mechanism of anti-emulsion synergist was analyzed. The results show that the anti-emulsion synergist has high molecular activity and strong diffusion ability and can be rapidly adsorbed at the oil-water interface to replace the colloid and asphaltene molecules which is the main factor to prevent the formation of emulsion.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE53

【相似文献】