含压裂液的采出液处理技术研究

发布时间：2018-05-07 21:55

  本文选题：压裂液 + 破乳剂　； 参考：《东北石油大学》2017年硕士论文

【摘要】：近年来,大庆油田低渗透区块油田老井平均每年压裂60-80口,95%以上的新井也需压裂后投产,龙一联地区为有效动用超低渗透高台子层,需采取大规模压裂措施,压裂后的油井采出液中含有胍胶等大量的化学添加剂,使采出液成分复杂,乳化情况严重,这些添加剂随采出液直接进入联合站,使含油采出液处理后,悬浮物含量不达标,对联合站原油电脱水系统及污水处理系统平稳运行造成很大冲击。本文旨在分析研究地层残余压裂液中影响采出液破乳脱水的因素,包括利用数显式黏度测试仪对含压裂液的返排液流变性的测定、利用颗粒图像分析仪检测了含压裂液的采出液的乳化情况、分析含有压裂液的乳状液对脱水效果的影响,利用界面张力仪测定了采出液的界面张力,利用Zeta电位仪对不同含量压裂液的采出液进行电位测定,确定影响乳状液稳定性的因素;进行破乳剂室内筛选和复配,并进行矿场试验,评价破乳剂破乳脱水效果。实验结果表明:导致含压裂液采出液脱水不达标的因素依次为:助排剂稠化剂防膨剂降粘剂稳定剂破胶剂杀菌剂;实验优选出最佳复配破乳剂为PT6682B与PS-639-06按1:3配比混合,确定了最佳加药温度为65℃;确定了不同压裂液含量、不同含水率、不同温度下最佳电脱电压、电脱时间、工作压力;并确定了在5种不同含量压裂液条件下的“五合一”装置的最佳运行参数。
[Abstract]:In recent years, the average number of new wells in the old wells in low permeability blocks of Daqing Oilfield is 60-80 or more than 95% per year. In order to effectively produce ultra-low permeability high table beds, large-scale fracturing measures are needed in Longyi area. After fracturing, a large number of chemical additives such as guanidine gum are found in the produced fluid after fracturing, which makes the composition of the recovery fluid complex and the emulsification situation serious. These additives enter the combined station directly with the produced fluid, so that the content of suspended solids does not reach the standard after the treatment of the oil-bearing produced liquid. It has a great impact on the steady operation of crude oil electric dehydration system and sewage treatment system. The purpose of this paper is to analyze and study the factors that affect the demulsification and dehydration of the residual fracturing fluid, including the determination of rheology of the fluid containing fracturing fluid by using a numerical explicit viscosity tester. The emulsion of fracturing fluid containing fracturing fluid was detected by particle image analyzer, the influence of emulsion containing fracturing fluid on dehydration effect was analyzed, and the interfacial tension of produced fluid was measured by interfacial tension meter. The potential of fracturing fluid with different content was determined by Zeta potentiometer to determine the factors that affect the stability of emulsion, and the demulsifier was selected and mixed in laboratory, and the field test was carried out to evaluate the effect of demulsifier demulsification and dehydration. The experimental results show that the factors leading to the substandard dehydration of fracturing fluid are as follows: thickener, antiswelling agent, viscosity reducer, stabilizer, gel breaker, bactericide, and the optimum demulsifier is PT6682B and PS-639-06 mixed at 1:3. The optimum temperature is 65 鈩，

本文编号：1858594