勘探阶段成藏动力学研究方法初探

Initial discussion on research of accumulation dynamics at hydrocarbon exploration stage

在石臼坨凸起东倾末端的陡坡带上,中深层发育了一系列断鼻圈闭,它们"背山面凹",成藏位置十分有利。但就目前的研究现状,对这个新的勘探领域的油气成藏规律还没有清晰的认识。油气成藏动力学是石油地质的重要理论课题,它对研究油气藏的形成机理、形成过程及现今油气藏的分布具有十分重要的指导意义。通过对石臼坨凸起东倾末端周边的成藏动力学模拟分析,对该区油气运移和分布现状有了感性认识,为该区的勘探奠定了基础。后期钻探的35-2-1井在古近系获得成功,证明了这种方法的有效性,可以在渤中探区其他陡坡带进一步推广。

A series of fault nose traps are formed in the medium-deep layers in the steep slope zones of eastern pitching end of Shijiutuo Uplift. The locations are excellent for hydrocarbon accumulation because they not only face the Bozhong Sag but also lean on the Shijiutuo Uplift. Howerver, as a new exploration field, the hydrocarbon accumulation rules are not clear sufficiently now at this area. Accumulation dynamics is such an important theory of petroleum geology that it is extremely useful for researching the accumulation mechanism, accumulation process and current reservoir distribution. By the modeling and analyzing of accumulation dynamics around the eastern pitching end of Shijutuo Uplift, the hydrocarbon migration and distribution are initially understood, which shows the direction of hydrocarbon exploration in the area. The drilling of Well 35-2-1 soon proves the availability of this method in Paleogene. It should be promoted in other steep slope zones of Bozhong exploration area.