大港油田羊木区块无碱复合驱注入参数优选室内研究

发布时间：2018-03-28 13:48

  本文选题：聚合物药剂　切入点：二元复合驱　出处：《东北石油大学》2017年硕士论文

【摘要】：由聚合物和表面活性剂组成的聚表二元复合体系在解决油田开采方面的技术难题上得到了广泛的应用,尤其是对高含水期的油田,并且得到了广泛的认可,能够大幅度的提高整体的原油采出量,得到了更广泛的经济效益。其原理是利用聚合物的曾粘特性,增加驱替相的粘度,改善流度比,能够有效的扩大波及体积,增加采油量;表面活性剂能够改变油水接触面以及和岩石骨架接触面的界面张力,改善毛细管力以及原油分子之间的内聚力,提高被波及体积中的洗油效率。聚合物和表面活性剂组成的聚表二元复合体系能够从扩大波及体积和增加洗油效率两个方面提高整体的原油采收率。但是由于聚合物种类和表面活性剂的种类繁多,性质方面存在差异,以及地层原油性质、地层水矿化度和地层温度的影响,在药剂选择方面需要考虑更多的因素,选择适合油藏区块的药剂尤为重要。与此同时,对于注入二元体系的段塞大小、注入段塞各药剂浓度和注入时机有更为严格的要求,本文从药剂的筛选以及最佳注入方式的优选方面,筛选出适合目标区块的聚表二元复合体系和最佳注入参数,为油田的开采和经济效益的增加提供可靠地理论依据,对油田生产具有指导性作用。本论文针对大港油田羊木区块的实际油藏地质特点以及区块目前的开发现状,通过室内物理模拟实验方式对区块二元复合驱开采进行研究。对4中不同聚合物进行粘温、粘浓的关系测试、以及不同聚合物等温等浓条件下、同种聚合物等浓不同温度下的稳定性进行测试,选择KYPAM作为二元体系的聚合物。通过对阴离子、阳离子、非离子三种类型的6中表面活性剂进行界面张力测定、浓度测定和吸附量测定,选取浓度为0.3%的PS-2为最佳药剂。评价不同浓度的二元体系注入能力以及与之相匹配的地层渗透率,最后优选出最佳的注入聚合物浓度为2000mg/L,最佳注入段塞大小为0.3PV,注入时机越早越好,在含水率80%时注入,整体采收率达到了53.1%。最终给出了适合大港油田羊木区块二元复合驱的驱替技术。
[Abstract]:The polymer and surfactant binary composite system has been widely used to solve the technical problems in oilfield production, especially for high water-cut oil fields, and has been widely recognized. The principle is to increase the viscosity of the displacement phase and improve the mobility ratio, which can effectively expand the sweep volume and increase the oil production. Surfactants can change the interfacial tension of oil-water interface and interface with rock skeleton, improve capillary force and cohesion between crude oil molecules, The polymer and surfactant binary composite system can improve the overall oil recovery by increasing the sweep volume and the oil washing efficiency, but due to polymer and surfactant, the oil recovery of the whole oil can be improved by increasing the sweep volume and the oil washing efficiency. There are many kinds of complexes and surfactants, There are differences in properties, as well as the effects of formation crude oil properties, formation water salinity and formation temperature. More factors need to be considered in the selection of reagents, and it is particularly important to select chemicals suitable for reservoir blocks. There are more strict requirements for the size of slug, the concentration and timing of the injected slug. In this paper, from the aspects of the selection of medicament and the optimal injection mode, The binary composite system and the best injection parameters suitable for the target block are selected to provide a reliable theoretical basis for oil field exploitation and increase of economic benefits. This paper aims at the actual reservoir geological characteristics of Yangmu block of Dagang Oilfield and the current development situation of the block. By means of laboratory physical simulation experiment, the binary compound flooding in block is studied. The relationship between viscosity temperature, viscosity concentration and isothermal isothermal concentration of different polymers is tested. The stability of the same polymer was tested at different temperatures, and KYPAM was selected as the polymer of binary system. The interfacial tension of 6 surfactants of anionic, cationic and Nonionic types was measured. Concentration determination and adsorption capacity determination, the concentration of 0.3% PS-2 is selected as the best reagent. The injection ability of binary system with different concentrations and the corresponding formation permeability are evaluated. Finally, the optimal polymer concentration is 2000mg / L, and the optimal slug size is 0.3PV. the earlier the injection time is, the better the injection time is, when the water content is 80%, The overall recovery has reached 53.1. Finally, the displacement technology suitable for binary compound flooding in Yangmu block of Dagang Oilfield is presented.
【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】：TE357.46
，

本文编号：1676587