陆相页岩含油性的化学动力学定量评价方法
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马晓潇(1989—),女,山东德州人,在读博士研究生,从事石油地质研究。联系电话:(0510)68787305,E-mail:maxiaoxiaocool@163.com。

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国家科技重大专项“中国典型盆地陆相页岩油勘探开发选区与目标评价”(2017ZX05049-001),中国石油化工集团公司油气成藏重点实验室开放基金“富有机质页岩形成地质模式研究”(33550007-17-ZC0613-0041)


Chemical kinetic model for quantitative evaluation on oil-bearing property of lacustrine shale
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    摘要:

    细粒岩石中含油性和烃类可动性评价是页岩油气勘探选区和目标评价的重要依据。实验室开放热解技术是常规烃源岩品质和油气资源量评价的主要手段。页岩油勘探开发重点为页岩储层中的可动资源,常规Rock-Eval热解法获得的主要参数不能直接用于页岩油气资源评价。通过常规热解法的改进和数据处理流程的优化,提出了一系列页岩含油性和可动性评价新方法,包括利用单一升温速率热解数据获取非均质页岩系统生烃化学动力学参数,利用热解数据判识和定量扣除富有机质页岩中运移烃,页岩总含油量的单步热解法及其与两步热解法的比较分析,以及利用常规热解曲线信息确定游离烃组分。将这些方法应用于济阳坳陷和潜江凹陷页岩含油性分析和运移烃识别等方面,大大地提高了页岩含油性定量评价结果的针对性,有利于准确圈定页岩油原地资源量和伴生的常规圈闭资源量。

    Abstract:

    Quantitative assessment of oil-bearing properties and oil mobility in fine-grained rocks was a prerequisite for the shale play selection and drilling target evaluation. In conventional exploration,laboratory-based open pyrolysis technique was commonly used to evaluate source rock quality and resource potential. Shale oil exploration and development focused on movable resources in shale reservoirs. Routine parameters obtained by Rock-Eval pyrolysis could not be applied directly to shale resource assessment. Through the improvement of conventional pyrolysis analysis methods and the optimization of data processing flow,a series of new evaluation methods of oil-bearing and movability of shale were proposed. The methods included chemical kinetic parameters of hydrocarbon generation in heterogeneous shale system obtained by using pyrolysis data of a single heating rate,identifying and quantitatively deducting hydrocarbon migration in organic-rich shale using pyrolysis data,“one-step”pyrolysis method of total oil content in shale and its comparison with two-step pyrolysis,and determining composition of free hydrocarbons by using conventional pyrolysis curve information. These methods have been applied to shale oil-bearing analysis and hydrocarbon migration identification in Jiyang Depression and Qianjiang Sag and the pertinence of quantitative evaluation results of shale oil-bearing is obviously improved,which are conducive to accurately delineating in-situ shale oil resources and associated conventional trap resources.

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马晓潇,黎茂稳,蒋启贵,钱门辉,李志明,庞雄奇.陆相页岩含油性的化学动力学定量评价方法[J].油气地质与采收率,2019,26(1):137~152

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  • 在线发布日期: 2019-04-02