论文部分内容阅读
页岩气富集不均匀,无论对于不同页岩油气藏还是同一页岩油气藏不同地方,产量都是有高有低.有必要系统分析和对比全球不同页岩油气的地质、石油系统与油气富集的关系,总结页岩油气富集的主控因素,从而采取合理的勘探和开发技术.以美国、阿根廷和中国典型页岩为例,基于野外和岩心观察、样品属性测试分析、储层表征、石油系统分析及油气测试,探究了页岩油气富集的主控因素及存在的认识误区.结果表明,富含有机质和脆性矿物的页岩主要分布于远离造山带物源的非深水的沉积和构造背景,富含石英和高伽马页岩并非判断优质储层的矿物和岩石物理标准,优质碳酸盐页岩应以富含碳酸盐和低伽马值为标准.“页岩油气藏”实际是细粒富含有机质的自生自储或与富含有机质烃源岩相邻的贫有机质细粒沉积储层.天然裂缝对页岩油气富集具有有利和不利的双重作用.因此,页岩油气富集同时受到沉积和构造环境、岩相及矿物组成、天然裂缝的耦合影响,且对不同沉积盆地、不同属性页岩的影响差异明显.
Shale gas is unevenly distributed and its production is high and low for different shale reservoirs and the same shale oil and gas reservoirs. It is necessary to systematically analyze and compare the geology, petroleum systems and oil and gas Enrichment and summarize the main controlling factors of shale oil and gas enrichment, so as to take reasonable exploration and development techniques.Using the typical shale in the United States, Argentina and China as an example, based on field and core observations, sample attribute analysis, reservoir Characterization, petroleum system analysis and oil-gas test, the main controlling factors and existing misunderstandings of shale hydrocarbon enrichment are explored.The results show that shale rich in organic matter and brittle minerals are mainly distributed in non-deep-water Sedimentary and tectonic backgrounds, rich in quartz and high gamma shale, are not geochemical and petrophysical criteria for high-quality reservoirs. High-quality carbonate shale should be carbonate- and low-gamma-rich. “ Rock-oil reservoirs ”are actually fine-grained organic-rich spontaneous self-storage or lean organic fine-grained sedimentary reservoirs adjacent to organic-rich hydrocarbon source rocks Natural fissures are favorable and unfavorable to shale hydrocarbon enrichment Weight effect. Thus, shale oil and gas enriched by both deposition and configuration environment, lithofacies and mineral composition, coupling effects of natural fractures, and different sedimentary basins, differences affect significantly the properties of the shale.