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为提高临清坳陷东部的油气勘探效率,以构造解析理论和含油气系统理论为指导,采用定量和定性相结合的方法分析了研究区断裂特征、发育演化,并结合油气成藏要素和成藏条件分析了其对上古生界煤成气成藏的影响。结果表明:平面上断层按走向可分为NE向(或NNE向)和NW向(或近EW向)两组;包括正断层和逆断层两种类型,正断层自基底到盖层中均有发育,而逆断层仅发育在侏罗系以下的地层当中,具有基底卷入的特征;断裂活动时期断裂可作为运移通道,对于油气的垂向运移和调整起着控制作用;剧烈的构造活动形成了多种与断层相关的构造类圈闭,圈闭形成时间与油气生成时期匹配良好;综合成藏条件的研究结果认为临清坳陷东部上古生界煤成气主要存在4种成藏模式。临清坳陷东部断层具有多期发育的特征,并控制着上古生界煤成气成藏,勘探重点为新生代断陷区,以晚期成藏为主要勘探类型。
In order to improve the exploration efficiency of oil and gas in the eastern part of Linqing Depression, the tectonic analysis theory and petroleum system theory are taken as the guide, and the quantitative analysis and qualitative analysis are used to analyze the characteristics and development of faults in the study area. The influence of reservoir conditions on the gas accumulation in Upper Paleozoic coalfields was analyzed. The results show that the faults in the plane can be divided into NE (or NNE direction) and NW (or near EW) directions according to the strike direction. There are two types of faults, normal faults and reverse faults. Both normal faults and basement faults While the reverse fault only develops in the strata beneath the Jurassic and has the characteristics of basement involvement. The fracture during the fault activity can act as a migration channel, which controls the vertical migration and adjustment of oil and gas. The violent structure The formation of a series of tectonic traps associated with the fault activity, trapping time and oil and gas generation period matching well; integrated reservoir conditions of the study found that the upper Paleozoic in the eastern Linqing depression, there are four types of gas accumulation mode. The faults in the eastern part of Linqing Depression have the characteristics of multi-period development and controlled the gas accumulation in the Upper Paleozoic. The focus of exploration is Cenozoic rift-subsidence area, with late-stage accumulation as the main exploration type.