【摘要】 为解中国南方海相页岩气成藏的基本特征,厘清成藏要素,建立符合中国复杂构造背景下页岩气储层选区评价指标等问题,借鉴美国页岩气储层评价指标,结合目前页岩气勘探评价成果,分析得出:中上扬子地区龙马溪组底部富有机质页岩储层分布连续、埋深适中、构造稳定,富有机质页岩在区域上分布连续,但含气性在局部表现为不连续;根据构造改造的程度,将中上扬子地区龙马溪组页岩分为构造改造区、靠近剥蚀区和构造稳定区三种类型.其中构造稳定区页岩储层表现为超压、含气量高,气井试采初期产量高,是中国中上扬子地区海相页岩气成藏的最有利区.更多还原

【Abstract】 To understand the characteristic of shale gas reservoir in the southern China,clarify the accumulation elements and build the shale gas screening parameters for China’s complex tectonic background with the combination of the shale gas exploration evaluation results,the study concludes that the organic-rich marine shale at the bottom Longmaxi distributes continually,with moderate buried depth and stable tectonic setting.The Longmaxi organic-rich shale spreads continuously in space,but the gas content is discontinuous in some region.According to the tectonic reworking characteristic,the Middle-Upper Yangtze region with Longmaxi shale is divided into the tectonic damage area,close to the denuded area and tectonic stable area.Shale reservoir in the tectonic damage area is overpressure and high gas content,and high initial gas rate was acquired in exploration.So the tectonic stable area is the most favorable area for shale gas accumulation.更多还原