| 基于页岩气地质调查评价的思考与认识 |
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| 作者姓名： | 邹武建 谢非 马风华 张勇 马小娟 |
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| 作者单位： | 1.宁夏回族自治区矿产地质调查院,宁夏 银川 750021; 2.宁夏回族自治区核地质调查院,宁夏 银川 750021; 3.宁夏回族自治区基础地质调查院,宁夏 银川 750021 |
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| 摘 要： | 在高频层序地层格架内,开展页岩气储层的矿物成因、母岩性质对页岩储层中黏土等矿物的发育形成及油气储层意义、矿物演化序列过程中对有机质生烃及形态变化的控制机理、特征性矿物赋存的油气地质学意义、特殊地质条件下的油气赋存认识以及“木桶效应”参数的识别等方面的研究,有望成为丰富页岩气地质理论的方向。在前人对页岩气地质调查评价研究的基础上,结合页岩气地质调查评价实践与认识,认为物源-沉积与生烃-成藏2个源汇体系的地球系统作用过程是页岩气储层非均质性的根本控制因素,构造-沉积这一结构性控制因素对页岩储层性质起决定性作用,后期构造改造及成藏演化等系统控制因素是对前者的修饰改造。页岩储层内烃类气体的多源多汇在一定程度上可突破储层非均质性,认为含气量与总有机碳含量相关系数是储层非均质性强弱的一种表征。研究成果丰富了页岩气调查评价理论体系,为后续评价工作提供了方法参考。
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| 关 键 词： | 页岩 页岩气 储层评价 储层非均质性 源汇体系 |
| 收稿时间： | 2021-02-22 |
Insights and understanding about shale gas geological survey |
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| Authors: | ZOU Wujian XIE Fei MA Fenghua ZHANG Yong MA Xiaojuan |
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| Institution: | 1. Mineral Geological Survey Institute of Ningxia, Ningxia Yinchuan 750021, China; 2. Nuclear Geological Survey Institute of NingXia, Ningxia Yinchuan 750021, China; 3. Basic Geological Survey Institute of Ningxia, Ningxia Yinchuan 750021, China |
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| Abstract: | The investigations under shale gas reservoirs in high-frequency sequence stratigraphic framework could be the research orientation in enriching shale gas geological theory, which include the significance of mineral causes and source rock properties in the development of clay mineral in shale gas reservoirs, the control mechanism of mineral causes and source rock properties on the organic matter hydrocarbon generation and morphological changes during the process of mineral evolution sequence, the significance of oil and gas geology with characteristic minerals occurrence, the understanding of oil and gas occurrence under special geological conditions, and the identification of Cask Effect parameters. Based on the previous studies on shale gas geological investigation and evaluation, combined with the practice and understanding of shale gas geological survey, the authors in this paper identified that the process of earth system interaction between two source-sink systems, provenances-depositional system and hydrocarbon generation-accumulation system, is the fundamental controlling factor of shale gas reservoir heterogeneity. Besides, the structural control factor of tectonic-sedimentary plays a decisive role in shale reservoir properties. The systematic control factors of tectonic transformation and reservoir forming and evolution in the later stage are the modification of the earlier stage. The multi-source and multi-sink of hydrocarbon gas in shale reservoir can break through the reservoir heterogeneity to a certain extent, and the correlation coefficient between gas content and TOC content is a characterization of reservoir heterogeneity. This research would enrich shale gas geological survey and evaluation theory, and provide method references for future work. |
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| Keywords: | shale shale gas reservoir evaluation reservoir heterogeneity source-sink system |
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