二氧化碳驱油环境下采出水结垢室内评价研究
Guangzhou Chemical Industry(2012)
Abstract
采用Ryzner稳定指数和Stiffs & Davis饱和指数对油田现场高矿化度、高钙离子浓度采出水的结垢趋势进行理论预测,并利用高温高压釜模拟注CO2驱油井下工况,开展了不同温度、CO2分压条件下井下采出水的结垢评价,模拟实验结果表明,现场采出水在模拟工况条件下的结垢率均在10%以上,温度和CO2分压的变化对采出水结垢率的影响较小。在试样表面光滑和模拟实验流速条件下,旋转试样表面未形成完整致密的CaCO3包覆垢层。
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Key words
produced water,scaling rate,calcium carbonate,scaling layer,CO2 flooding,scaling prediction
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