铬微凝胶体系与萨南二.三类油层配伍性研究

发布时间：2018-07-20 13:15

【摘要】：近年来,铬微凝胶驱油技术在大庆油田取得了良好的开发效果,己经成为油田开发的一项重要技术。为进一步明确铬微凝胶驱油技术在应用过程中的选井选层原则,规范参数设计标准,本文针对大庆萨南油田储层物性特征和流体性质,结合静态成胶性能评价和物理模拟实验结果,开展了铬微凝胶调驱体系与萨南二、三类油层配伍性室内研究。实验结果表明,大庆油田清水配制污水稀释的铬微凝胶体系成胶性能良好,能够保证铬微凝胶体系在地层中的成胶性能。静态成胶推荐配方:聚合物550mg/L+交联剂浓度70mg/L。铬微凝胶体系在流动条件(5层25目不锈钢筛网层循环流动)下能够成胶,动态剪切条件下推荐配方:聚合物950mg/L+交联剂浓度90mg/L。铬微凝胶体系在注入井附近地层的高流速区不会成胶,体系注入性良好,在注入过程不会造成近井堵塞堵塞。铬微凝胶体系具有良好的液流转向作用和深部调驱功能,能避免高渗透层段过早突破而发生窜流,良好的液流转向能力可使物性相对较差的中、低渗透层位得以有效动用。与铬微凝胶体系配伍的油层最低渗透率界限为100×10-3μm2。铬微凝胶与聚合物交替注入工艺一方面可发挥铬微凝胶的深度液流转向作用,另一方面又能利用聚合物的流度控制作用提高驱油效果。三管并联岩心驱替实验中,当交替轮次为4轮次,铬微凝胶段塞尺寸为0.05PV,聚合物段塞尺寸为0.06PV,候凝时间为3天,聚合物段塞采用低浓+高浓的形式时,采收率提高值为24.52%。通过确定铬微凝胶体系的最佳注入参数,可在油田开发过程中实现降本增效的目的,对于知道油田现场实际开发有一定指导意义。
[Abstract]:In recent years, chromium microgel flooding technology in Daqing oilfield has achieved good development results, has become an important oil field development technology. In order to further clarify the principle of well selection and reservoir selection in the application of chromium microgel flooding technology, and to standardize the design standard of parameters, this paper aims at the physical and fluid properties of reservoir in Sanan Oilfield, Daqing. Based on the static gelling performance evaluation and physical simulation results, the compatibility of chromium microgel flooding system with Sanan 2 and 3 oil layers was studied in laboratory. The experimental results show that the chrome microgel system diluted with clean water in Daqing Oilfield has good gelation property and can guarantee the gelation property of chromium microgel system in stratum. Recommended formula for static gelation: polymer concentration of 550 mg / L crosslinking agent 70 mg / L. Chromium microgel system can form glue under flow condition (5 layers 25 mesh stainless steel screen layer circulating flow). Under dynamic shear condition, the formula is recommended: the concentration of polymer 950mg / L crosslinking agent 90 mg / L. The chromium microgel system does not form glue in the high velocity zone near the injection well, and the injection property of the system is good, and the near well blockage will not be caused during the injection process. Chromium microgel system has good liquid flow steering function and deep adjusting flooding function. It can avoid premature breakthrough of high permeability layer and lead to channeling. Good liquid flow turning ability can make the low permeability layer can be used effectively in the relatively poor physical properties. The minimum permeability limit of the reservoir compatible with chromium microgel system is 100 脳 10 ~ (-3) 渭 m ~ (2). The alternating injection process of chromium microgel and polymer can play the role of deep liquid flow turning of chromium microgel on the one hand, and improve the oil displacement effect on the other hand by using the mobility control of polymer. In the experiment of three-pipe parallel core displacement, when the alternating cycle is 4 times, the size of chromium microgel slug is 0.05 PVV, the size of polymer slug is 0.06 PVV, the waiting time is 3 days, and the polymer slug adopts the form of low concentration and high concentration, the enhanced recovery efficiency is 24.52%. By determining the optimal injection parameters of chromium microgel system, the purpose of reducing cost and increasing efficiency can be realized in the process of oilfield development, and it is of certain guiding significance to know the actual development of oil field.
【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
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本文编号：2133639