烃源岩非均质性及其意义——以中国元古界下马岭组页岩为例

发布时间：2019-01-24 18:47

【摘要】：以中国元古界下马岭组页岩为例,基于野外露头、镜下观察和地球化学特征分析,对不同尺度的烃源岩非均质性及烃类的微观赋存特征进行研究。岩石圈板块运动和古纬度位置导致烃源岩宏观旋回性和非均质性,天文轨道力控制的气候变化可能是导致烃源岩微观非均质性的最主要原因。因此,烃源岩非均质性是恒定存在的,不仅体现为有机质含量的差异,还包括碎屑物来源和孔隙度的差异。在油气资源评价,尤其是非常规油气资源评价时需要充分考虑烃源岩的非均质性。烃源岩非均质性特征为油气生成、排驱和储集提供了良好的"源储组合",为估算非常规油气经济可采储量提供了新的参考指标。因此烃源岩非均质性的定量化研究对非常规油气形成机理及资源量预测具有重要意义。
[Abstract]:Taking the Lower Maling formation shale of the Proterozoic in China as an example, based on field outcrop, microscopic observation and geochemical analysis, the heterogeneity of hydrocarbon source rock and the microscopic occurrence characteristics of hydrocarbon on different scales are studied. The lithospheric plate movement and paleo latitude position lead to the source rock macrocyclicity and heterogeneity. The climatic change controlled by astronomical orbital force may be the main cause of the source rock microscopic heterogeneity. Therefore, the heterogeneity of source rock is constant, not only the difference of organic matter content, but also the difference of clastic material source and porosity. The heterogeneity of hydrocarbon source rocks should be fully considered when evaluating oil and gas resources, especially unconventional oil and gas resources. The heterogeneity of hydrocarbon source rock provides a good "source reservoir combination" for hydrocarbon generation, expulsion drive and reservoir, and provides a new reference index for estimating unconventional economic recoverable reserves of oil and gas. Therefore, the quantitative study of heterogeneity of source rock is of great significance to the formation mechanism of unconventional oil and gas and the prediction of resource quantity.
【作者单位】：中国石油天然气股份有限公司油气地球化学重点实验室;中国石油勘探开发研究院;
【基金】：国家科技重大专项(2016ZX05004) 国家自然科学基金(41530317)
【分类号】：P618.13

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