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页岩气目的层的评价优选是页岩气勘探早期研究的重点。页岩既是烃源层又是储集层,一套准确、快速评价页岩的技术方法是研究的关键。通过在下扬子地区西部页岩气勘探研究的实践,提出了“两层·六端元”页岩评价方法,该方法通过优选反映页岩生烃潜力和储集性能的参数,并制定各参数的定量评价标准,再利用六端元图对页岩层进行半定量的图解分类评价,具有较强的系统性和可操作性。利用该方法对下扬子地区西部发育的4套古生界页岩进行了综合评价,其中下二叠统孤峰组和上二叠统大隆组页岩烃源条件、储集性能均较好,是该区页岩气勘探的主要目的层。
The evaluation of shale gas targets is the most important research in shale gas exploration. Shale is not only hydrocarbon source reservoir but also a set of accurate and rapid evaluation of shale technology is the key. Through the practice of shale gas exploration in the western part of the Lower Yangtze region, a “two-layer and six-terminal” shale evaluation method is proposed. By optimizing parameters that reflect shale hydrocarbon generating potential and reservoir performance, Parameters of the quantitative evaluation criteria, and then use the six-terminal graph of the shale layer graphical semi-quantitative evaluation, with strong systematic and operational. Four sets of Paleozoic shale developed in the western part of the Lower Yangtze region were comprehensively evaluated by this method. Among them, the hydrocarbon source conditions and reservoir properties of the shale in the Gregorian and Upper Permian Dalong Formation in the Lower Permian are better , Is the main target of shale gas exploration in this area.