大庆油田三典型区块原油与三元体系乳化作用研究

发布时间：2018-04-12 11:23

本文选题：采出液药剂浓度 + 乳化作用　；参考：《东北石油大学》2015年硕士论文

【摘要】：本文以喇嘛甸油田(采油六厂)、萨尔图油田(采油一厂)和杏树岗油田(采油四厂)储层地质和流体为研究对象,开展了三元复合体系与三典型区块原油乳化作用后药剂在油水相中分配比例及其影响因素、三元复合驱采出液变化规律以及原油性质差异对三元复合体系与原油乳化作用后药剂分配的影响等实验研究。结果表明,与萨尔图油田和杏树岗油田储层状况、药剂浓度和段塞组成相比,喇嘛甸油田储层注采井连通状况较差、注入聚合物相对分子质量和浓度较高,加之原油性质差异,造成其采出液中表面活性剂和碱浓度较低。与萨尔图和杏树岗油田原油相比较,喇嘛甸油田原油黏度、含蜡量和含胶量较高且酸性活性组分种类和数量较多,强碱在油相中损耗量较多,喇嘛甸原油中重质组分含量较高且碳链分布范围较广,重烷基苯磺酸盐类表面活性剂在原油中损耗量较大。三元复合体系与原油乳化作用后,部分表面活性剂和碱会进入到了油相中去,聚合物难以溶入油相。表面活性剂主要以物理混合方式进入到油相,可以返回到水相中来。碱主要是与原油中有机酸等组分发生化学反应而损失,是不可逆过程。聚合物可以抑制表面活性剂和碱与原油间的作用,减少损耗量。岩心实验表明,与单一整体段塞相比较,多段塞注入方式采出液中聚合物、表面活性剂和碱浓度减小,界面张力较高,采出液黏度降低。与聚合物相比较,表面活性剂和碱在岩心中不可及孔隙体积较小,波及体积较大,滞留量较大,突破时间较晚,三种化学剂间出现色谱分离现象。
[Abstract]:In this paper, the reservoir geology and fluid in Lamadian Oilfield (No. 6 Oil recovery Plant), Saltu Oilfield (No. 1 Oil recovery Plant) and Xingshugang Oilfield (No. 4 Oil recovery Plant) are taken as research objects.After emulsification of crude oil in three typical blocks, the distribution ratio of the agent in oil-water phase and its influencing factors were carried out.Experimental study on the variation law of produced liquid in ASP flooding and the effect of crude oil property difference on the distribution of medicament after emulsification between ASP system and crude oil was carried out.The results show that, compared with Saltu and Xingshugang oil fields, the injection-production well connectivity of Lamadian oilfield is poor, the relative molecular weight and concentration of injected polymer are higher, and the crude oil properties are different.As a result, the concentration of surfactant and alkali in the extracted solution is low.Compared with Saltu and Xingshugang oil fields, Lamadian oil field has higher viscosity, wax content and colloid content, more kinds and quantities of acidic active components, and more loss of strong alkali in oil phase.Lamadian crude oil has a high content of heavy components and a wide range of carbon chain distribution. Heavy alkylbenzene sulfonate surfactants have a large loss in crude oil.After the emulsification of crude oil, some surfactants and alkaloids enter into the oil phase, and the polymer is difficult to dissolve into the oil phase.Surfactants are mainly physically mixed into the oil phase and can be returned to the water phase.Alkali is mainly lost by chemical reaction with organic acids and other components in crude oil. It is an irreversible process.Polymer can inhibit the interaction between surfactant and alkali and crude oil and reduce the loss.The core experiments show that the polymer, surfactant and alkali concentration in the liquid produced by multi-slug injection are decreased, the interfacial tension is higher, and the viscosity of the produced liquid is decreased compared with the single integral slug.Compared with polymer, surfactant and alkali have smaller volume of unreachable pores, larger sweep volume, larger retention, later breakthrough time, and chromatographic separation between the three chemicals.
【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】：TE357.46

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