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苏北盆地源岩无双峰生烃和未低熟油

刘玉瑞

刘玉瑞. 苏北盆地源岩无双峰生烃和未低熟油[J]. 石油实验地质, 2019, 41(4): 461-474. doi: 10.11781/sysydz201904461
引用本文: 刘玉瑞. 苏北盆地源岩无双峰生烃和未低熟油[J]. 石油实验地质, 2019, 41(4): 461-474. doi: 10.11781/sysydz201904461
LIU Yurui. Bimodal hydrocarbon generation and immature oil do not exist in the North Jiangsu Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(4): 461-474. doi: 10.11781/sysydz201904461
Citation: LIU Yurui. Bimodal hydrocarbon generation and immature oil do not exist in the North Jiangsu Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(4): 461-474. doi: 10.11781/sysydz201904461

苏北盆地源岩无双峰生烃和未低熟油

doi: 10.11781/sysydz201904461
基金项目: 

中国石化重大科技专项(ZDP17010)资助。

详细信息
    作者简介:

    刘玉瑞(1962-),男,教授级高级工程师,从事油气勘探研究及管理。E-mail:liuyr.jsyt@sinopec.com。

  • 中图分类号: TE122.1

Bimodal hydrocarbon generation and immature oil do not exist in the North Jiangsu Basin

  • 摘要: 针对苏北盆地"未低熟油"理论盛行,却与勘探效果完全不符合的矛盾,深入剖析前人论著、甄别资料真伪,发现问题如下:误用原始资料,把野值当证据;存在认识盲区,成烃模式缺乏多参数严谨论证,推论不成立;有油/岩亲缘对比,未做油藏/烃灶成熟度匹配一致性验证;脱离实践,认识经不起源岩钻探气测资料等勘探检验。由此证明,所谓"源岩早期非干酪根生油、双峰成烃模式"是假的,未低熟油并不存在。基于此,利用大数据资料分析误差、剔除野值,优选出油/岩的甾烷C29S/(S+R)、C29ββ/(αα+ββ)、萜烷C31S/(S+R)、C32S/(S+R)和CPIOEP成熟度敏感参数,将干酪根热降解晚期生成原油分为浅成熟油、中成熟油、成熟油3类。Ro>0.70%的中成熟-成熟源岩,与大量的中成熟-成熟油成熟度参数匹配很好;Ro在0.60%~0.70%的浅成熟源岩,与少量的浅成熟油成熟度参数有一些匹配关系;Ro<0.60%的未成熟源岩,无原油可与之匹配,表明没有非干酪根的未低熟油。实践反映,中成熟-成熟源岩钻探气测异常明显,由其供油气的圈闭勘探效果好,已探明石油储量99.83%属此类原油;浅成熟源岩气测无或微弱异常,单靠此类油源不足以形成商业规模的油藏,多数仅见油气显示;未成熟源岩气测无异常,若无异地成熟油供给,圈闭不成藏。

     

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  • 收稿日期:  2018-09-17
  • 修回日期:  2019-01-16
  • 刊出日期:  2019-07-28

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