北美超压富集页岩气研究现状及勘探启示

发布时间：2018-06-28 05:49

本文选题：页岩气 + 超压富集　；参考：《煤炭科学技术》2016年10期

【摘要】：为了找准国内页岩气富集高产的目标,分析北美地区页岩气勘探开发特点大有裨益。在探讨北美超压页岩气分布与特点的基础上,研究了页岩气超压成因机理及有利富集区评价技术。结果表明:新兴的北美页岩油气区超压特征明显,以Marcellus页岩和Haynesville页岩气藏为典型。超压页岩有机质含量普遍较高,具有较高的热演化程度、相对较高的孔隙度和良好的保存条件。超压页岩气区中游离气量比例大,气藏产能相对较高。其机理在于生烃增压产生微裂缝,大幅增强储层渗流性能。同时压力增大提高了页岩气含量,更有利于增强页岩气的封存。就国内各勘探区块而言,核心区的确定与地层压力关系尤为重要。应加强地层流体的压力分析,着重寻找页岩气藏的超压甜点区。
[Abstract]:It is helpful to analyze the characteristics of shale gas exploration and development in North America in order to find out the target of domestic shale gas enrichment and production. On the basis of discussing the distribution and characteristics of overpressure shale gas in North America, the genetic mechanism of overpressure of shale gas and the evaluation technology of favorable enrichment area are studied. The results show that the overpressure characteristics of the emerging North American shale oil and gas area are obvious, and the Marcellus shale and Haynesville shale gas reservoirs are typical. The content of organic matter in overpressure shale is generally high, with high thermal evolution degree, relatively high porosity and good preservation conditions. The ratio of free gas in the overpressure shale gas area is large and the gas reservoir productivity is relatively high. The mechanism is that hydrocarbon-generating pressurization produces microfractures and greatly enhances reservoir percolation performance. At the same time, the increase of pressure increases the content of shale gas, which is more conducive to enhance the sealing of shale gas. For the exploration blocks in China, it is very important to determine the core area and the formation pressure. The pressure analysis of formation fluid should be strengthened, and the over pressure dessert area of shale gas reservoir should be found.
【作者单位】：榆林学院能源工程学院;中国地质科学院;天津经济技术开发区博士后科研工作站;
【基金】：天津市企业博士后创新项目择优资助项目(20130224) 榆林学院高层次人才科研启动基金资助项目(16gk18)
【分类号】：P618.13

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