不同赋存状态页岩油定量表征技术与应用研究

发布时间：2018-05-04 00:13

本文选题：热释烃 + 游离油　；参考：《石油实验地质》2016年06期

【摘要】：页岩中滞留油存在着多种赋存形式,其中只有游离油才是天然弹性能量开采方式下页岩油产能的有效贡献者。但是,如何对页岩中游离油与吸附油含量进行定量表征以及如何明确它们与周缘介质的相互关系,目前并没有现成的研究方法。该文通过对现有Rock-Eval热解和热解色谱方法进行改进,结合样品溶剂抽提前后热解对比实验和不同类型样品的综合分析,建立了不同赋存状态页岩油热释法定量表征方法。利用新建立的方法对济阳坳陷页岩油专探井岩心样品进行了实验分析,发现页岩吸附油含量与有机质丰度成正比,而干酪根吸附—互溶能力随热成熟度增加而降低;同时,页岩体系内游离油/吸附油比值与有机碳含量存在负相关关系,表明干酪根不是液态游离烃赋存的主要场所。因此,建立的方法可以作为页岩油赋存机理研究和页岩含油性快速评价的实用手段。
[Abstract]:There are many forms of remaining oil in shale, and only free oil is an effective contributor to shale oil productivity under natural elastic energy exploitation. However, there is no existing research method on how to quantitatively characterize the content of free oil and adsorbed oil in shale and how to clarify the relationship between them and the surrounding medium. By improving the existing Rock-Eval pyrolysis and pyrolysis chromatography methods, combining with the comparative pyrolysis experiments before and after solvent extraction and the comprehensive analysis of different types of samples, a quantitative characterization method for the pyrolysis of shale oil with different occurrence states was established. The core samples of shale oil exploration wells in Jiyang depression were analyzed by using the new method. It was found that the content of shale adsorbed oil was directly proportional to the abundance of organic matter, while the absorption-intersolubility capacity of kerogen decreased with the increase of thermal maturity. There is a negative correlation between free oil / adsorbed oil ratio and organic carbon content in shale system, which indicates that kerogen is not the main place where liquid free hydrocarbon occurs. Therefore, the established method can be used as a practical means to study the occurrence mechanism of shale oil and to evaluate shale oil content quickly.
【作者单位】：中国石化石油勘探开发研究院无锡石油地质研究所;页岩油气富集机理与有效开发国家重点实验室;国家能源页岩油研发中心;中国石化油气成藏重点实验室;中国石化胜利油田分公司;
【基金】：国家重点基础研究发展计划(973)项目“陆相页岩油形成演化与赋存机理”(2014CB239101)资助
【分类号】：P618.13

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