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稠油在中国的石油资源中所占比例较大,其开采技术一直是石油界探索的问题。中国普遍采用热采方式开采稠油,即进行蒸汽吞吐和蒸汽驱。鲁克沁三叠系克拉玛依组超深普通稠油开发实现了规模注水冷采,年采油稳定在50万吨以上,但在注水开发中受储层强非均质性和油水粘度比大等因素影响,注水开发矛盾突出,理论采收率只有13.8%。
Heavy oil accounts for a large proportion of China’s oil resources. Its mining technology has always been an issue explored by the petroleum industry. China commonly uses thermal recovery methods to produce heavy oil, that is, steam huff and steam flooding. The ultra-deep common heavy oil in the Rukqin Triassic Karamay Group has achieved large-scale water injection and cold mining, with an annual oil production of more than 500,000 tons. However, due to factors such as strong reservoir heterogeneity and oil-water viscosity ratio in waterflood development Impact, water conservancy contradictions prominent, the theoretical recovery rate of only 13.8%.