CAJ | 학술논문

聚合物HPAM驱技术已广泛地应用于油田并取得了巨大的经济效益.目前低渗油藏对聚合物驱的适应性正处于探索阶段,开展低渗油藏注聚可行性的研究具有重要的应用价值.采用德国RS-600流变仪双狭缝DG41 Ti测量系统,针对低渗油藏聚合物驱的HPAM流变性进行了研究,根据注入不同浓度的聚合物和后续注水压差的变化,测定了阻力系数和残余阻力系数,研究了低渗油藏注聚的可行性.实验结果表明:HPAM溶液阳离子屏蔽效应会降低溶液视粘度,减小溶液剪切稀释特性.随着HPAM溶液注入速度升高,岩心的注入压力很快上升并达到稳定,压力随流速呈非线性关系;HPAM长链分子被剪断,粘度降低,阻力系数逐渐下降.对低渗透率岩心,HPAM浓度750 mg/L的残余阻力系数高于浓度1 000 mg/L.
취합물HPAM구기술이엄범지응용우유전병취득료거대적경제효익.목전저삼유장대취합물구적괄응성정처우탐색계단,개전저삼유장주취가행성적연구구유중요적응용개치.채용덕국RS-600류변의쌍협봉DG41 Ti측량계통,침대저삼유장취합물구적HPAM류변성진행료연구,근거주입불동농도적취합물화후속주수압차적변화,측정료조력계수화잔여조력계수,연구료저삼유장주취적가행성.실험결과표명:HPAM용액양리자병폐효응회강저용액시점도,감소용액전절희석특성.수착HPAM용액주입속도승고,암심적주입압력흔쾌상승병체도은정,압력수류속정비선성관계;HPAM장련분자피전단,점도강저,조력계수축점하강.대저삼투솔암심,HPAM농도750 mg/L적잔여조력계수고우농도1 000 mg/L.
Polymer HPAM flooding technology has been widely used in oil fields and achieved tremendous economic benefits. At present low permeability reservoir polymer flooding adaptability in the exploratory stage,how to carry out low-permeability reservoir polymer HPAM injection feasibility study has important application value. The German manufactured RS-600 rheometer DG41 Ti double-slit measurement system being used to research rheology characteristic of HPAM polymer in low permeability reservoir core. According injection pressure changes of different concentration polymer HPAM solution injecting and successive water injecting,the resistance coefficient and residual resistance coefficient were measured to research the feasibility of low-permeability reservoir polymer HPAM injection. The experimental result shows that HPAM solution cation shielding effect should reduce solution apparent viscosity and shear dilute properties. In process of low-permeability cores inject into HPAM solution,injection pressure of cores rise rapidly and attain stability,HPAM long-chain molecules had been cut,viscosity reduced and resistance coefficient decreased gradually with HPAM solution injection rate increase,the pressure is non-linear relationship with flow rate. The residual resistance coefficient of HPAM solution concentration 750 mg/L is higher than HPAM solution concentration 1 000 mg/L in process of low-permeability core inject into HPAM solution.