生物酶稠油解堵剂室内实验研究

针对哈拉哈塘油田缝洞型油藏连通单元井组实施注水驱替开发效果差异较大这一问题, 开展了缝洞单元连通方式及注水开发对策研究。对于3种不同的缝洞单元连通方式: 暗河岩溶管道、大尺度缝、弥散缝伴有大尺度缝, 开展机理性和矿场试验研究, 提出了合理的注水开发对策。暗河体系连通井组低注高采、洞注暗河驱洞采的注采关系; 大尺度缝沟通缝洞单元, 建议以单独机采为主；弥散缝伴有大尺度缝沟通缝洞单元, 因不同单元之间的匹配具有差异性，应控制合理的注采比。后续动态调整, 提高了注水开发采收率, 极大改善了区块连通单元注水驱替效果。该研究对相同或类似的缝洞型碳酸盐岩油藏连通单元注水开发具有一定的借鉴及指导意义。

Experimental Study on Bio-enzyme Plug Removal Agent of Heavy Oil

Aiming at the problem of big differences in the development effect of waterflooding implemented in the connected unit well groups of fissure-cavity type reservoirs in Halahatang Oilfield, a research on the connection modes of the fissures-cavities unit and waterflooding counter measures is carried out in this paper. For the three types of fissures - cavities unit connection modes: the underground river karst channels, large scale fissures, dispersive crevices with large scale fractures, we carry out the mechanism and field test researches, and put forward reasonable waterflooding counter measures. For the well groups connected by the underground river system,we adopt a mode of low-injection and high-recovery; for the fissures-cavities units linked up by large-scale fissures, we recommend to use separately mechanical recovery; for the fissures -cavities units linked up by dispersive crevices with large-scale fractures, due to the difference in the matching of various units, we should control a reasonable injection/ production ratio, and follow - up dynamic adjustment, improve the waterflooding recovery efficiency, greatly improve the effect of waterflooding in the connected units of blocks.