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    烃源岩生气增压定量评价模型及影响因素

    郭小文 何生 刘可禹 董甜甜

    郭小文, 何生, 刘可禹, 董甜甜, 2013. 烃源岩生气增压定量评价模型及影响因素. 地球科学, 38(6): 1263-1270. doi: 10.3799/dqkx.2013.123
    引用本文: 郭小文, 何生, 刘可禹, 董甜甜, 2013. 烃源岩生气增压定量评价模型及影响因素. 地球科学, 38(6): 1263-1270. doi: 10.3799/dqkx.2013.123
    GUO Xiao-wen, HE Sheng, LIU Ke-yu, DONG Tian-tian, 2013. A Quantitative Estimation Model for the Overpressure Caused by Natural Gas Generation and Its Influential Factors. Earth Science, 38(6): 1263-1270. doi: 10.3799/dqkx.2013.123
    Citation: GUO Xiao-wen, HE Sheng, LIU Ke-yu, DONG Tian-tian, 2013. A Quantitative Estimation Model for the Overpressure Caused by Natural Gas Generation and Its Influential Factors. Earth Science, 38(6): 1263-1270. doi: 10.3799/dqkx.2013.123

    烃源岩生气增压定量评价模型及影响因素

    doi: 10.3799/dqkx.2013.123
    基金项目: 

    国家自然科学基金项目 41302110

    中国地质大学构造与油气资源教育部重点实验室开放基金 TPR-2013-17

    详细信息
      作者简介:

      郭小文(1980-), 男, 副教授, 主要从事油气地质方面研究.E-mail: cuggxw@163.com

    • 中图分类号: TE122

    A Quantitative Estimation Model for the Overpressure Caused by Natural Gas Generation and Its Influential Factors

    • 摘要: Ⅲ型干酪根烃源岩生气增压定量评价是一个复杂过程, 因为Ⅲ型干酪根以生气为主的同时伴生少量的油生成, 而且在达到一定的温度条件下原油还将逐渐裂解成天然气.在考虑烃源岩生烃过程中天然气的渗漏和排出、氢指数对生烃量的影响、原油裂解成气、生烃作用产生的超压对孔隙水, 油和干酪根的压缩作用、天然气在孔隙水和石油中的溶解作用等因素的基础上建立了Ⅲ型干酪根烃源岩生烃增压定量评价模型, 并对模型参数进行敏感性分析.Ⅲ型干酪根烃源岩生气增压受到烃源岩孔隙度、成熟度、有机质丰度、天然气残留系数等多种参数的影响.有机碳含量、氢指数和天然气残留系数3个参数中以氢指数对Ⅲ型干酪根烃源岩生烃增压产生的影响最大, 天然气残留系数影响最小.天然气残留系数只要大于0.2就可以产生超压, 表明保存条件不是Ⅲ型干酪根烃源岩形成生烃增压最主要的控制因素.

       

    • 图  1  烃源岩生烃增压概念模型

      Fig.  1.  The concept model of overpressure caused by hydrocarbon generation of source rocks

      图  2  Ⅲ型干酪根生烃特征以及油气生成率与转化率的关系

      Fig.  2.  Characters of modeled oil and natural gas generation for the source rocks with type Ⅲ kerogen and relationship between the transformation ratio and hydrocarbon (oil and gas) generation ratio

      图  3  Ⅲ型干酪根生烃作用形成的超压和压力系数随深度变化关系

      Fig.  3.  Relations of natural gas generated overpressures and pressure coefficients with depths

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    出版历程
    • 收稿日期:  2012-11-24
    • 刊出日期:  2013-06-01

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