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在注聚驱开发过程中,随着聚合物注入量的增加,由于油层发育的不均质性、存在高渗透带、大孔道等等原因,造成聚合物很快到达产出井,产生窜聚问题。多年来,尽管采取了多种治理手段,但开发效果依然很差,而且随着注聚开发的不断进行,窜聚问题越来越突出,见聚浓度不断上升。超分子阳离子聚合物已在胜利油田孤东采油厂几口出聚浓度高的井进行了矿场实验,取得了良好的经济效果。为深入研究阴、阳离子反应形成的絮状沉淀对地层的封堵强度及阳离子聚合物的驱油效果,必须通过室内实验进行进一步的研究。阴、阳离子聚合物调剖机理是:从油井或水井注入的阳离子聚合物,聚合物首先进入高渗大孔隙,阳离子聚合物遇到阴离子聚合物,通过静电中和形成絮状沉淀,对高渗层进行相应的封堵,从而可达到调整吸水剖面的目的。
In the process of polymer flooding development, due to the increase of polymer injection amount, due to the inhomogeneity of oil layer development, there are high permeable belts, macropores and the like, which causes the polymer to reach the production well very quickly and produce channeling problem. Over the years, although a variety of management methods have been adopted, the effectiveness of development remains poor. With the continuous development of agglomeration and development, the problem of channeling and gathering has become increasingly prominent, and the concentration of polyunits has been on the rise. Supramolecular cationic polymer has been in the Gudong oil production plant in Shengli several wells out of high concentrations of wells conducted field experiments and achieved good economic results. In order to further study the blocking strength of the flocculent precipitate formed by the cation and cation reaction and the displacement effect of the cationic polymer, further studies must be conducted through laboratory experiments. The mechanism of profile control of anionic and cationic polymers is as follows: the cationic polymer injected from the oil well or water well, the polymer first enters the hyperosmotic macropores, the cationic polymer encounters the anionic polymer, neutralizes and forms the flocculent precipitate by electrostatic charge, Layer of the corresponding closure, which can achieve the purpose of adjusting the water profile.