注水井调剖新型堵剂研制及评价实验

发布时间：2018-12-10 13:11

【摘要】：油田注水开发进入中后期,由于地层非均质性的影响,造成注入水沿高渗透层突进,导致油井含水上升快、水淹早、注入水波及中低渗透层的程度低,水驱开发效果差。若对注水井的吸水剖面进行调整(即调剖),可达到改善开发效果的目的。矿场调剖实践中所用的一类主要调剖剂是预交联体膨型颗粒调剖剂,由于其具有操作简便、工艺简单等优点,在国内各大油田的使用量急剧上升。本文针对我国多数油田注水井调剖过程中存在油藏埋藏较深、矿化度高等技术难题,在实验室合成了一种新型调剖剂——QL-HVES缓膨抗盐吸水高黏弹颗粒调剖剂,并通过各组份浓度的影响确定了该新型调剖剂的最佳配方。通过静态和岩心流动实验,系统评价了该调剖剂在不同矿化度和不同温度条件下的强度、热稳定性、抗盐性能、吸水性能、保水性能。室内实验结果表明:新合成的这种调剖剂具有良好的黏弹性和柔性,此外,还具有良好的缓膨和抗盐效果,其综合性能可以满足不同油层条件下调剖作业要求。在完成室内研究的基础上,2012年8月使用新合成的QL-HVES缓膨抗盐吸水高黏弹颗粒调剖剂在姬塬油田罗1区地197-45井组进行了现场实验,取得了良好的增油降水效果。
[Abstract]:In the middle and late stage of oilfield water injection development, due to the influence of formation heterogeneity, the injection water burst along the high permeability layer, resulting in the oil well water cut rising quickly, water flooding early, the degree of injection water wave and low permeability layer is low, and the effect of water drive development is poor. If the water absorption profile of the injection well is adjusted (I. E. profile control), the development effect can be improved. One of the main profile control agents used in the field profile control practice is the pre-cross conjoined expanded particle profile control agent. Because of its advantages of simple operation and simple process, the usage of profile control agent in various oil fields in China has increased sharply. In view of the deep reservoir buried in the profile control process of water injection wells in most oilfields in China, a new profile control agent, QL-HVES, is synthesized in the laboratory, which is a new type of profile control agent with low salt and water absorption and high viscoelastic particles. The optimum formulation of the new profile control agent was determined by the influence of each component concentration. Through static and core flow experiments, the strength, thermal stability, salt resistance, water absorption and water retention of the profile control agent under different salinity and temperature were systematically evaluated. The results of laboratory experiments show that the new profile control agent has good viscoelasticity and flexibility, in addition, it has a good effect of slow swelling and salt resistance, and its comprehensive performance can meet the requirements of down-profile operation under different reservoir conditions. On the basis of the laboratory study, a field experiment was carried out in August 2012 with a newly synthesized QL-HVES salt absorbent and high viscoelastic granular profile control agent in well 197-45 of Luo1 area, Jiyuan Oilfield, and a good effect of increasing oil and reducing water was obtained.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE39

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