富含有机质泥页岩岩相表征的研究现状与趋势

Research Progress and Trend of Organic-Rich Shale Lithofacies Characterization

富含有机质泥页岩往往具有丰富、多变的岩相特征;岩相提供了泥页岩储层形成的基础地质条件,岩相表征的方式与精细程度直接影响着页岩油、页岩气的储层质量评价及开发方案研究。通过对比大量国内外泥页岩岩相研究实例,综述分析了近年来泥页岩的岩相分类方法、测试表征技术与研究思路,总结了各种方法的优缺点,探讨了岩相表征研究的发展趋势。分析表明,泥页岩岩相的分类方案逐渐向适合于地质规律研究的双层次、多参数精细分类方向发展,向方便于工程应用的实用性方向发展;岩相参数测试呈现出测试新技术普及应用、多技术组合应用的趋势;岩相表征方式具有向多参数定量表征、岩相建模方向发展的趋势。针对泥页岩海(湖)相沉积背景,构建研究区的岩相模型分布体系。在岩相表征基础上,泥页岩储层非均质性研究、储层建模研究,以及典型岩相的储层形成机理研究逐渐得到重视,以服务于储层质量评价与储层预测模型研究。

Organic-rich shale layers usually have plentiful and mutable lithofacies characteristics. Lithofa- cies provide the basic geological conditions for the formation of shale reservoirs. The manner and fine de- gree of shale lithofacies characterization directly affect the reservoir quality evolution and development scheme study of shale gas and shale oil. Through the comparison of a large number of domestic and foreign researches of shale tithofacies , this paper summarizes and analyses the lithofacies classification methods and test token technology of shale in recent years, discusses the advantages and disadvantages of various methods, and the development trend of the lithofacies characterization. This study shows that, the classi- fication scheme gradually develops to ＂the dual level and multi parameter＂ fine classification suitable for the geological laws study, and to the practical application convenient for engineering. The lithofacies pa- rameter test shows the trend of new technology popularization and application of multi-technology. The lithofacies characterization method changes to quantitative representation of multiple parameters, fine building of lithofacies model, and the establishment of lithofacies model distribution system in the study area. In order to serve the reservoir quality evaluation and reservoir prediction model, on the basis of shale facies characterization, reservoir heterogeneity, reservoir modeling, and typical facies reservoir formation mechanism research has attracted special attention.