Abstract: After 30 years of water flood development, G979 block of Xiaoji oilfield has entered high water cut and high recovery percent development period, and the remaining oil is highly scattered. In this situation, the basic physical and chemical properties of KN corsslinked polymer and SMG microsphere gel for high temperature reservoir were studied. The results showed that the gel synthesized by HPAM (hydrolyzed polyacrylamide) and KN crosslinking agent could be longtime stable with constant viscosity of 100 000 mPa•s at 113 ℃. And the residual resistance factor of it in core with permeability of 3.0 μm2 reached to above 20, exhibiting good plugging performance. SMG microspheres could resist 120 ℃ and their sizes increased obviously due to swelling at high temperature, which tended to plug the high permeability and would change the direction of the injected water during the followup water flooding stage, with the ultimate purpose of enhancing oil recovery. The KN corsslinked polymer and SMG microsphere gel for high temperature reservoir were optimized for the deep profile control test. Meanwhile the formation, well pattern, injected volume, plug structure were studied and optimized, combining with the adjustment of injection parameters on time. After large dose deep profile control applied in G979 block, the development effect and the water injection indexes have been significantly improved. Until June 2013, 13 wells out of corresponding 14 wells have taken effect and the increasing oil amount 9 500 t.

Key words: High dose,    ,  Deep profile control,    ,  Microsphere,     ,  High water cut and high recovery percent reservoir

摘要： 针对小集油田官9 7 9断块“ 双高” 开发阶段地质及剩余油分布特点, 研究了耐高温的连续凝胶及SMG 微球凝胶的基本物理化学特性。结果表明, 实验所优选的 HP AM 与交联剂 KN所形成的凝胶在1 1 3℃下可以长期 稳定, 黏度基本保持不变, 达到1 0 00 0 0mP a·s , 且在渗透率为3. 0μm2 的岩心中的残余阻力系数可以达到2 0以上, 具有很好的封堵性能。SMG微球在1 2 0℃下可以稳定存在, 且高温溶胀后粒径明显变大, 可以对高渗管产生封堵, 使后续注入液转向低渗层, 从而提高采收率。将优选出的适用于高温油藏的 KN高温连续凝胶及SMG微球凝胶开 展大剂量深部调驱试验, 并对层系、 井网、 注入体积、 段塞结构等进行研究优化, 结合现场及时的优化调整, 整个断块 实施大剂量深部调驱后注水指标和开发效果都得到了明显改善, 截止到2 0 1 3年6月, 1 4口调驱受益油井, 见效1 3 口, 纯增油95 0 0t 。

关键词: 大剂量,    ,  , 深部调驱,    ,  , 微球,    ,  , &ldquo, 双高&rdquo, 油田