二类油层弱碱石油磺酸盐三元复合体系性能研究

发布时间：2018-06-29 08:01

本文选题：三元复合驱 + 二类油层　；参考：《东北石油大学》2015年硕士论文

【摘要】：本文从弱碱三元复合体系表面活性剂的驱油机理入手,采用室内模拟岩心驱油实验和现场示范区块试验研究的方法,结合大庆油田采油三厂现场注采井网生产资料以及地层发育状况,重点对弱碱三元复合体系性能进行了评价,从而得出弱碱三元复合体系现场注入方案,完善了三元复合驱试验效果评价指标,为北三东示范区三元复合驱工业化推广提供依据。首先,对石油磺酸盐表面活性剂复合驱油体系的界面张力、粘度性能、乳化性能、吸附性能进行了实验评价。此外,利用贝雷岩芯和人造岩心开展了室内物理模拟实验,对石油磺酸盐复合体系驱油效果进行了系统的评价。结果表明石油磺酸盐复合体系的界面张力能够在较宽的活性剂浓度范围内到10-3m N/m数量级,体系的粘度和界面张力的稳定性较好,该体系可以提高原油采收率20%以上等。针对北三东二类油层弱碱三元复合驱示范区井间注入压力不均衡、全区地层压力水平低等问题,借助动、静态资料,以注入方案调整为主,油水井措施为辅,实施有针对性的跟踪调整,保证了较强的注采能力,取得了较好的综合调整效果。在示范区三元主段塞阶段初期,选用WT008颗粒调剖堵水剂对10口注入井实施调剖,调剖后注入压力上升,视吸入指数下降,表明颗粒调剖对高渗透层起到封堵作用。试验区油井见到了阶段增油效果,统计试验区13口采油井,与调剖前相比,日产液下降152t,日产油上升3t,含水下降3.31个百分点。为进一步促进油井见效,最大程度提高采收率,大庆油田实现接替稳产和有质量有效益可持续发展提供了技术支持。
[Abstract]:In this paper, starting with the oil displacement mechanism of surfactants in the weak alkali ternary system, the laboratory simulation core flooding experiment and the field demonstration block test are used to study the oil displacement mechanism. Combined with the production data of injection and production well pattern and formation development in No.3 Oil production Plant of Daqing Oilfield, the performance of weak alkali ternary compound system was evaluated, and the field injection scheme of weak alkali ternary compound system was obtained. The evaluation index of the test effect of ASP flooding is improved, which provides the basis for the industrialization and popularization of ASP flooding in North Sandong demonstration area. Firstly, the interfacial tension, viscosity, emulsification and adsorption properties of petroleum sulfonate surfactant compound flooding system were evaluated experimentally. In addition, laboratory physical simulation experiments were carried out by using Bayley core and artificial core, and the oil displacement effect of petroleum sulfonate composite system was systematically evaluated. The results show that the interfacial tension of petroleum sulfonate composite system can reach 10-3m N / m in a wide range of active agent concentration, the viscosity and interfacial tension of the system are stable, and the oil recovery can be increased by more than 20%. In view of the problems of uneven injection pressure between wells and low formation pressure level in the demonstration area of weak alkali ASP flooding in the second class of North Sandong oil reservoir, with the help of dynamic and static data, the injection scheme is mainly adjusted and the oil-water well measures are supplemented. The implementation of targeted tracking and adjustment ensures a strong injection-production capacity and achieves a better comprehensive adjustment effect. WT008 particle profile control and water plugging agent was used to control the profile of 10 injection wells at the initial stage of the slug stage of the three main member in the demonstration area. The injection pressure increased and the apparent suction index decreased after profile control, which indicated that the particle profile control played a plugging role on the high permeability layer. The oil wells in the test area have seen the effect of increasing oil production in the stage. Compared with those before profile control, daily liquid production decreased 152 t, daily oil production increased 3 t, and water cut decreased 3.31% in 13 oil wells in the test area. It provides technical support for further promoting oil well efficiency and increasing oil recovery to the greatest extent, for Daqing oil field to succeed stable production and to achieve sustainable development of quality and benefit.
【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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