《致密储层表活剂微观驱油》毕业论文终版.docx

致密储层表活剂微观驱油特征实验研究致密储层表活剂微观驱油特征实验研究摘要：摘要：表活剂驱油技术是提高石油采收率的重要方法之一为了研究出在致密储层中不同化学物质的驱油效率的不同特征，通过对比找出最有效的驱油的化学物质，并研究其驱油特征本文中通过真实砂岩模型研究了表活剂驱油与水驱油的特征，实验中包括单相驱替、水测、油驱水、水驱油、表活剂驱油 5 种驱替实验，经过统计数据，计算其渗透率，做出渗透率曲线，通过对比曲线分布特征判断出了表活剂的驱油效率最好同时，研究表活剂微观驱油特征是通过在显微镜下观察不同时刻.的驱油面积来确定其的残余油分布特征，从而进一步计算其对应的含油面积和流度比，确定其驱油特征实验结果表明，随着驱替压力的增大，表活剂驱油和水驱油的含油面积逐渐增大，岩石中的渗透率也逐渐增大，含油饱和度逐渐减小同时实验证明了表活剂驱油效率大于水驱油效率关键词：关键词：表活剂；低渗致密储层；微观驱油特征；真实砂岩模型Experimental study on microscopic displacement characteristics of surfactant in tight reservoirAbstract:Surfactant flooding technology is one of the important methods to improve oil recovery.In order to study the reservoir in different chemical oil displacement efficiency of different characteristics, chemical flooding through comparison to find out the most effective, and to study the oil displacement characteristics. Through the real sandstone model of surfactant flooding and water flooding characteristics, including single-phase displacement experiment water, test, oil flooding, water flooding, surfactant flooding 5 displacement experiments, through statistical data, calculate the permeability, make the permeability curve by comparing the distribution curve to determine the displacement efficiency of surfactant is the best. At the same time, study of surfactant flooding is micro characteristics through the observation of different time in the area of oil flooding under the microscope to determine the The residual oil distribution, so as to further calculate the corresponding oil-bearing area and mobility ratio, determine the flooding characteristics. The experimental results show that with the increase of pressure for flooding, surfactant flooding and water flooding oil area gradually increases, the rock permeability increases, oil saturation decreases gradually. At the same time experiment proved that the surfactant oil displacement efficiency is higher than the efficiency of water flooding.Key words: surfactant; low permeability tight reservoir; microscopic oil displacement characteristics; true sandstone modelI目录目录1 绪论......................................................................................................................................11.1 研究的目的和意义....................................................................................................11.2 国内外研究现状........................................................................................................21.3 主要研究内容............................................................................................................52 表面活性剂驱油机理和影响因素......................................................................................62.1 表面活性剂的驱油机理............................................................................................62.1.1 表面活性剂的驱油的条件..............................................................................62.1.2 表面活性剂驱的驱油原理..............................................................................62.2 表面活性剂驱油的微观特征....................................................................................72.2.1 表面活性剂体系对水驱后盲端类残余油的作用特征..................................82.2.2 表面活性剂体系对水驱后膜状类残余油的作用特征..................................82.2.3 表面活性剂体系对水驱后柱类残余油的作用特征......................................92.2.4 二元复合体系微观驱油特征........................................................................102.2.5 不同孔隙类型对应微观水驱油特征............................................................102.2.6 储层剩余油微观分布特征............................................................................132.3 表面活性剂微观驱油的影响因素..........................................................................142.3.1 储层剩余油微观分布控制因素....................................................................142.3.2 低渗透砂岩储层渗透率的影响因素............................................................142.3.3 低渗透砂岩储层驱油效率的影响因素........................................................152.3.4 表面活性剂驱油效率的影响因素................................................................182.4 微观驱油的实验方法..............................................................................................193 实验方法............................................................................................................................21II3.1 实验模型..................................................................................................................213.2 实验流体..................................................................................................................213.3 实验流程..................................................................................................................223.4 实验步骤..................................................................................................................223.5 实验数据处理及误差分析......................................................................................233.5.1 实验数据处理的方法....................................................................................233.5.2 实验数据误差分析..................................................................。