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致密油是继页岩气之后当下非常规油气领域的热点,全球致密油可采资源量达到473×108t。通过系统分析国内外致密油气聚集成藏的典型特征,对致密油形成的地质条件与富集模式进行了研究。结果表明致密油的形成需要考虑4大条件:沉积环境、构造位置、烃源岩条件、储层发育。致密油聚集方式以准连续型与连续型为主,油气成藏机制以超压充注为主,运移充注的方式称为“动力圈闭”。
Tight oil is the hotspot in the field of unconventional oil and gas after shale gas. The total amount of recoverable resources in the world is 473 × 108t. By systematically analyzing the typical features of the accumulation of tight oil and gas at home and abroad, the geological conditions and enrichment patterns of tight oil were studied. The results show that the formation of tight oil need to consider four major conditions: sedimentary environment, tectonic position, source rock conditions, reservoir development. The tight oil accumulation mode is mainly quasi-continuous and continuous. The mechanism of hydrocarbon accumulation is mainly overpressure, and the method of migration and filling is called “power trap ”.