Research and practice of deep-buried heavy oil lifting nique in Tahe Oil Field
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摘要: 塔河油田稠油属深层缝洞型碳酸盐岩油藏,油藏埋深5300~6600m,地层温度为128~130℃(5600m),地温梯度为2.2℃/hm,非均质性强,流体性质复杂,具有“五高”特点,即高矿化度、高含H2S、高原油粘度、高密度和高含蜡。油藏及其流体的复杂性决定了塔河油田深层稠油油藏举升工艺的多样性。以塔河油田深层稠油为研究对象,以“研究、实践、总结、再实践”为思路,通过不断的研究与实践,逐渐形成了掺稀降粘、化学降粘、电加热、抽稠泵、抗稠油电泵、复合举升等十余项稠油举升及配套工艺技术。Abstract: The deep-buried fractured vuggy carbonate reservoirs in the Tahe Oil Field locate 5 300-6 600m deep,with the formation temperature of 128-300℃(5 600 m) and the thermal gradient of 2.2℃/hm.Crude oil from the reservoir has strong heterogeneity and complex property.It is characterized byhigh salinity,high HZ S content,high viscosity,high density and high wax content.Due to the above-mentioned features,the lifting technique of deep-buried heavy oil should take into consideration of sever-al aspects.Through research,practice,conclusion and re-practice,a set of lifting and associated tech-nique has been proposed,including thin oil mixing and chemical ways to reduce viscosity,electricalheating,heavy oil pump,electric submersible pump and compound lifting.
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Key words:
- associated technique /
- lifting technique /
- deep-buried heavy oil /
- Tahe Oil Field
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