烃源岩有机碳含量与生排油效率动态评价

发布时间：2018-01-30 03:47

本文关键词： 优质烃源岩有机碳含量生排油效率成熟度烃源岩评价资源评价　出处：《石油实验地质》2017年04期 　论文类型：期刊论文

【摘要】：选择海相典型烃源岩样品和人工配制烃源岩样品进行热压模拟实验,对比分析了海相烃源岩的生油量、生排油效率与烃源岩有机碳含量的关系,模拟结果表明:(1)烃源岩的生排油量与烃源岩有机碳含量呈线性正相关关系,生排油效率与有机碳含量呈曲线(非线性)正相关关系,相关系数的大小与烃源岩的干酪根类型、岩性及演化史等有关;(2)在整个生烃演化过程中,高有机质含量的优质烃源岩(TOC一般大于2%)的生排油量和效率都高于中等有机质丰度的中等烃源岩(TOC一般在0.5%~2.0%之间)和低有机质丰度的差烃源岩(TOC一般小于0.5%),只有高有机质丰度的优质烃源岩才能够大量生排出油并形成大油田,差烃源岩即使很厚也难以形成大量的油气聚集;(3)在地质演化过程中,烃源岩TOC含量及其生排油气能力始终都是动态变化的,因此需要在确定演化阶段的基础上,结合有机碳含量和生排油效率进行烃源岩和资源量动态评价。
[Abstract]:The typical marine source rock samples and artificially prepared source rock samples were selected to carry out hot pressure simulation experiments. The relationship between oil generation efficiency and organic carbon content of source rocks was compared and analyzed. The simulation results show that there is a linear positive correlation between the oil generation and discharge amount and the organic carbon content of the source rock, and the linear (nonlinear) correlation between the oil generation and expulsion efficiency and the organic carbon content. The correlation coefficient is related to the kerogen type, lithology and evolution history of the source rock. 2) during the whole evolution of hydrocarbon generation. The TOC of high quality source rock with high organic matter content is generally greater than 2) the oil generation and discharge efficiency of TOC is higher than that of medium source rock with medium organic matter abundance, and the TOC is generally between 0.5% and 2.0%. The TOC of the source rocks with low organic matter abundance is generally less than 0.5%). Only the high quality source rocks with high organic matter abundance can produce large amount of oil and form large oil fields, even though the difference source rocks are very thick, it is difficult to form a large amount of oil and gas accumulation. 3) during the geological evolution, the TOC content of source rock and its hydrocarbon generation and expulsion ability are always dynamic, so it is necessary to determine the evolution stage. Combined with organic carbon content and efficiency of oil generation and discharge, the source rock and resource quantity were evaluated dynamically.
【作者单位】：页岩油气富集机理与有效开发国家重点实验室;中国石化石油勘探开发研究院无锡石油地质研究所;渤海钻探工程技术研究院;
【基金】：国家自然科学基金重点项目“古生界页岩含气性原生有机质控制作用研究”(U1663202)资助
【分类号】：P618.13
【正文快照】： 烃源岩评价研究一直是石油地质与地球化学研究的重要内容之一,也是油气资源评价的关键环节[1-4]。常规烃源岩评价大多从有机质丰度、类型和成熟度角度直接评价烃源岩品质,近年来也有从构造背景、沉积环境[5-8]、古气候、古生产力[9-11]、沉积物源、生烃母质[12-16]等角度对烃

【相似文献】