Deep acidification practice in fractured-vuggy carbonate reservoirs
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摘要: 随着塔河油田缝洞型油藏的不断开发,受多轮次注水污染、能量下降裂缝闭合、完井酸压效果差等综合影响,远井裂缝导流能力差的井逐步增多,生产表现为供液不足,严重制约油井生产。前期主要依靠常规酸化、大型酸化等传统酸化理念改造,酸液进入近井地带即快速反应,作用距离十分有限,有效率低。通过实施深穿透酸化工艺技术,有效解决了远井通道导流问题,应用前景广阔。Abstract: With the deep development of the fractured-vuggy reservoirs in the Tahe oil field, due to multi-round water injection pollution, cracks closing by energy loss, and poor well completion and acidification effects, there are more and more wells in which the far shaft fractures show a poor conducting capacity. Liquid lack seriously restricts oil production. Conventional and large-scale acidifications were applied; however, acid fluids reacted rapidly when they came close to wells, showing a restricted effective range and poor efficiency. A deep acidification technique was implemented, which conducted far channels and showed a good prospect.
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Key words:
- conductivity /
- deep acidification /
- fractured-vuggy carbonate reservoir /
- Tahe oil field
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