Study of new gel agent to plug horizontal well in clastic rock reservoir in Tahe Oilfield
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摘要: 为解决常规冻胶堵剂强度低、耐温耐盐差、成本高等问题,针对塔河油田高温高盐特点,引入有机冻胶与无机网络互穿技术,研发了具有较高强度的耐温耐盐新型冻胶体系。结果表明,该冻胶体系在温度为130 ℃、矿化度为20×104 mg/L地层水中能稳定90 d,有较强的封堵能力和耐冲刷能力。选取TK937H井开展了冻胶堵水现场试验,取得了较好增油效果,为塔河碎屑岩水平井堵水提供了新的途径。Abstract: The conventional gel plugging agents have some shortcomings such as low intensity, poor heat/ salt resistance and high cost. In view of high temperature and salinity in the Tahe Oilfield, the combination of organic gel and inorganic network is introduced, and a new gel plugging system with higher resistance for heat/ salt is set up. The new system remains stable for 90 days in formation water at the temperature of 130 ℃ and the salinity of 20×104 mg/ L, showing good capacities of plugging. It has been applied in well TK937H, raising oil product obviously.
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Key words:
- resistance for heat/ salt /
- gel /
- water plugging /
- horizontal well /
- clastic reservoir /
- Tahe Oilfield
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