萨北油田调剖剂性能评价与研究

发布时间：2018-03-20 07:33

  本文选题：复合离子聚合物　切入点：阴离子聚合物　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国大多数油田进入高含水期,平面矛盾和层间矛盾开发过程中的存在的问题日益突出。在长期水驱的影响下,地层孔隙、孔道、孔喉逐步扩大,“短路”现象在油田水驱中日益严重,常规调剖堵水技术已不能满足现场需求,注水锥进现象导致油区见水过早,产量递减,驱油效率降低。为解决这一问题,国内外通过调剖堵水技术来提高采收率。为了筛选出适合萨北油田注聚区块实际情况的调剖剂,本文分析了聚合物调剖剂类型及阴离子聚合物调剖剂和复合离子聚合物调剖剂的调剖机理与特点。确定了聚合物凝胶性能评价方法,并设计评价阴离子聚合物与复合离子调剖剂成胶性能成胶特性影响因素的实验,通过实验来评价聚丙烯酰胺浓度、六亚甲基四胺剂量、溶液pH、间苯二酚的加量、地层水矿化度等对冻胶强度的影响。以及实验分析出聚合物分子量及浓度、JL-1浓度、苯酚浓度、间苯二酚浓度、溶液pH、矿化度、剪切程度等对复合离子调剖剂成胶性能的影响。研究结果表明:阴离子聚合物与复合离子调剖剂通过吸附增阻、动力捕集、粘弹阻力等实现聚合物调剖剂的调剖;粘度法、变压力法以及阻力系数残余阻力系数法可以有效测量并计算凝胶体系的粘度、转变压力以及阻力系数从而对凝胶体系进行评价;阴离子聚合物调剖剂的凝胶强度受聚丙烯酰胺浓度影响较大,间苯二酚的、六亚甲基四胺以及PH的增加会缩短成胶时间并增加凝胶强度。对于复合离子调剖剂,随着聚合物浓度以及JL-1浓度的增加,凝胶体系的强度呈逐渐增加后趋于平稳状态,当苯酚浓度发生改变时,成胶时间没有明显的变化,凝胶强度也相差不大。间苯二酚浓度的升高使得溶液的成胶时间明显缩短,凝胶强度也有显著的增加。pH值较低时,成胶快速,但粘度保持时间较短。在pH值较高时,不易成胶。而pH值在5.10~5.15之间时,成胶性能较好。矿化度对其成胶时间与成胶强度没有明显的影响。体系的剪切程度越大,凝胶粘度越低,强度越小。
[Abstract]:As most oil fields in China enter high water-cut period, the problems in the development process of plane and interlayer contradictions become increasingly prominent. Under the influence of long-term water drive, the formation pore, pore channel, The pore throat expands gradually, the phenomenon of "short circuit" becomes more and more serious in oil field water drive, the conventional profile control and water shutoff technology can no longer meet the field demand, the phenomenon of water injection coning leads to premature water discovery, decreasing production rate and decreasing oil displacement efficiency in oil field. In order to solve this problem, In order to screen the profile control agent suitable for the actual condition of polymer injection block in Sabei Oilfield, the oil recovery is improved by profile control and water plugging technology at home and abroad. In this paper, the type of polymer profile control agent and the mechanism and characteristics of anionic polymer profile control agent and compound ion polymer profile control agent are analyzed. The evaluation method of polymer gel properties is determined. An experiment was designed to evaluate the gelling properties of anionic polymer and compound ion profile control agent. The concentration of polyacrylamide, the dose of hexamethylenetetramine, the pH of solution, the amount of resorcinol were evaluated by experiments. The influence of formation water salinity on gel strength, and the experimental analysis of polymer molecular weight and concentration: JL-1 concentration, phenol concentration, resorcinol concentration, solution pH, salinity, The effect of shear degree on the gelling properties of compound ion profile control agent. The results show that the profile control agent of polymer is achieved by adsorption resistance, dynamic trapping, viscoelastic resistance and so on; viscosity method, viscosity method, etc. The variable pressure method and the resistance coefficient residual resistance coefficient method can effectively measure and calculate the viscosity, transition pressure and resistance coefficient of the gel system to evaluate the gel system. The gel strength of anionic polymer profile control agent is greatly affected by the concentration of polyacrylamide. The increase of resorcinol, hexamethylenetetramine and PH will shorten the gelation time and increase the gel strength. With the increase of polymer concentration and JL-1 concentration, the strength of the gel system gradually increased and then tended to steady. When phenol concentration changed, the gelation time did not change obviously. The gelation time of the solution was shortened with the increase of resorcinol concentration. When the gel strength was lower, the gelation rate was faster, but the viscosity was short. When the pH value was higher, the gelation time was shorter. When pH value is between 5.10 and 5.15, the gelation property is better. The salinity has no obvious influence on the gelation time and strength. The higher the shear degree of the system is, the lower the gel viscosity is and the smaller the strength is.
【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】：TE39
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本文编号：1638089