Method to improve gas injection efficiency in carbonate reservoirs
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摘要: 塔河油田奥陶系油藏为典型的缝洞型碳酸盐岩油藏。随着注水效果逐渐变差,有必要探寻碳酸盐岩缝洞型油藏开采的新方法,其中注气开采是有效手段之一。以提高碳酸盐岩缝洞型油藏注气效率方法为研究目的,通过对比溢出口距离、注气时机、注气速度和注气作业的气水比,提出了提高碳酸盐岩强能量油藏注气效率的方法。Abstract: The Ordovician reservoirs in the Tahe oil field are typical fractured-vuggy carbonate reservoirs. As water injection efficiency becomes worse gradually, new methods for fractured-vuggy carbonate reservoirs are demanded, among which gas injection is an effective way. Spillway distance, gas injection timing, gas injection speed, and gas/water proportion were compared, putting forward a new method for improving the gas injection efficiency of carbonate reservoirs.
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Key words:
- fractured-vuggy reservoir /
- gas huff and puff /
- mechanism /
- influencing factor
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