Study and Application of High Temperature Gas Blocking Plug
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摘要: 为解决新疆塔中地区外围区块高温高压裂缝性油气藏存在气窜速度过快,排气时间较长的难题,通过对抗高温增黏提切剂、抗高温降滤失剂等关键处理剂的研选,研究出抗高温气滞塞体系,气滞塞抗温180℃,高温下凝胶强度大于30 Pa,黏度大于60 mPa·s,稳定时间大于120 h。现场应用结果表明:气窜速度降低率达80%以上,降低气窜速度效果明显,延长了作业时间,提高了钻完井的安全和效率。抗高温气滞塞可以用于解决新疆塔中地区的高压裂缝性油气藏的气侵问题,为防气窜钻完井施工提供了一种安全有效的井控技术。Abstract: A high temperature gas blocking plug has been developed to resolve the problems of too fast gas channeling and long period of gas drainage encountered in high temperature high pressure fractured reservoirs in the periphery of Tazhong area. The gas blocking plug, developed with choice high temperature gelling agents and high temperature filter loss reducer etc., functions normally at 180℃, with its gel strength greater than 30 Pa, viscosity greater than 60 mPa·s, and time of stabilization of longer than 120 h at elevated temperatures. Field application of the gas blocking plug indicated that the rate of gas channeling was reduced by more than 80%, greatly prolonged the time required foroperation and enhanced the safety and efficiency of well drilling and completion. The high temperature gas blocking plug can be used to resolve the gas cut problem encountered in drilling high pressure fractured petroleum reservoirs in Tazhong area, providing a safe and effective well control technology for gas channeling prevention during well drilling and completion.
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Key words:
- Fractured gas reservoir /
- Gas cut /
- High temperature resistant /
- Gas blocking plug /
- Well control
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