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The feasible conditions study of steamflooding for heavy oil reservoirs in China after cyclic steam injection

机译：循环注汽后我国稠油油藏注蒸汽的可行条件研究

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摘要

China is rich in heavy oil reserves. In recent ten years, the production of heavy oil has rapidly grown through application of steam injection and the annual production reached up to 11.9 million tons in 1993. At present, with the increase of cycles of steam injection, the effectiveness becomes poorer and the challenge of changing steam stimulation into steamflooding has to be confronted. Because of heavy oil reservoirs in China characterized with complex geological conditions, deeply buried, multi-layers and serious heterogeneity, especially some complicated conditions occurring in steam cycling, the effectiveness of steamflooding pilots has not been ideal commonly. Therefore, it is urgent to study and determine the comprenhensive conditions at which the reservoirs are feasible to be converted from steam cycling to steeamflooding at the present technological situation.
机译：中国拥有丰富的重油储备。近十年来，通过注蒸汽的应用，稠油产量迅速增长，1993年的年产量达到1190万吨。目前，随着注蒸汽周期的增加，有效性变差，面临挑战。将蒸汽刺激转化为注水的过程必须面对。由于中国的稠油油藏地质条件复杂，深埋，多层，非均质性严重，特别是在蒸汽循环中发生一些复杂的条件，因此，蒸汽驱引水的有效性普遍不理想。因此，迫切需要研究和确定在当前技术条件下将油藏从蒸汽循环转换为驱油技术的综合条件。

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