鄂尔多斯盆地延长组陆相页岩孔隙类型划分方案及其油气地质意义

发布时间：2018-02-26 18:37

本文关键词： 孔隙结构孔隙分类方案陆相页岩鄂尔多斯盆地　出处：《石油与天然气地质》2016年01期 　论文类型：期刊论文

【摘要】：鄂尔多斯盆地延长组陆相页岩储层作为一种非常规储集体,对于其孔隙类型划分,当前国内尚无针对性的划分方案。为此,充分调研了国内外页岩储层孔隙类型分类方案,并从中优选出Loucks和于炳松的分类方案,结合延长组陆相页岩孔隙类型扫描电镜观察结果,对Loucks和于炳松的分类方案适当修改,提出了针对性更强的延长组陆相页岩孔隙类型划分方案,以期为延长石油陆相页岩气的发展提供理论支撑。此外,通过氩离子抛光扫描电镜观察,分析了延长组陆相页岩储层孔隙类型发育特征,系统研究了各类孔隙的形成机制、发育规模及油气地质意义。实验结果表明,延长组陆相页岩中粘土集合体内矿物片间孔隙油气地质意义最大;其次为黄铁矿晶间孔隙、有机质孔隙、裂缝孔隙和粘土矿物片间孔隙;再次为刚性颗粒粒间孔隙及边缘孔;石英颗粒溶孔孔径小、连通性差,油气地质意义最小。
[Abstract]:As a kind of unconventional reservoir, the continental shale reservoir of Yanchang formation in Ordos Basin has not been divided into different types of pore types at present in China. Therefore, the classification schemes of pore types of shale reservoirs at home and abroad are investigated. The classification schemes of Loucks and Yu Bingsong were selected, and the classification schemes of Loucks and Yu Bingsong were modified by combining the results of scanning electron microscope observation of the pore types of terrestrial shale in Yanchang formation. In order to provide theoretical support for the development of oil shale gas in Yanchang formation, a more targeted scheme for the classification of pore types in the continental shale is put forward. In addition, the argon ion polishing scanning electron microscope is used to observe the formation. This paper analyzes the characteristics of pore type development in the continental shale reservoir of Yanchang formation, systematically studies the formation mechanism, development scale and geological significance of various types of pores. The experimental results show that, In Yanchang formation, the interlaminar pores of clay assemblage have the greatest geological significance, followed by the intergranular pores of pyrite, the pores of organic matter, the pores of fractures and the pores of clay minerals, the second are the intergranular pores of rigid particles and the marginal pores. Quartz particles have small pore size, poor connectivity and minimum significance in oil and gas geology.
【作者单位】：延长石油集团有限责任公司;中国石化石油勘探开发研究院;中国地质大学(北京)能源学院;
【基金】：陕西省科技统筹创新工程计划项目(2012KTZB03-01-01) 国家高技术研究发展计划(863计划)项目(2013AA064500) 国家科技支撑计划项目(2012BAC26B00)
【分类号】：P618.13

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