天然气地球科学

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鄂尔多斯盆地东南部山西组泥页岩生烃热模拟实验

王晖1,张磊1,石军太2,张丽霞1,高潮1,张亮1,郭超1   

  1. 1.陕西省陆相页岩气成藏与开发重点实验室,陕西延长石油(集团)有限责任公司研究院,陕西 西安 710075;
    2.中国石油大学(北京)石油工程学院,北京 102249
  • 收稿日期:2017-02-22 修回日期:2017-06-16 出版日期:2017-07-10 发布日期:2017-07-10
  • 作者简介:王晖(1984-),男,山东曲阜人,工程师,硕士,主要从事非常规气藏地化特征及产能评价相关研究. E-mail:wanghui060708@163.com.
  • 基金资助:

    陕西省科技统筹创新工程项目(编号:2012KTZB03-03-01)资助.

Hydrocarbon generation simulation of source rocks in Shanxi Formation of Ordos Basin

Wang Hui1,Zhang Lei1,Shi Jun-tai2,Zhang Li-xia1,Gao Chao1,Zhang Liang1,Guo Chao1   

  1. 1.Shaanxi Key Laboratory of Lacustrine Shale Gas Accamulation and Exploitation,Research Institute of Shaanxi Yanchang Petroleum (Group)Co.Ltd.,Xi’an 710075,China;
    2.College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China
  • Received:2017-02-22 Revised:2017-06-16 Online:2017-07-10 Published:2017-07-10

摘要:

鄂尔多斯盆地东南部页岩气资源潜力巨大,目前缺乏对山西组泥页岩生烃潜力的系统评价,因而制约了对该区烃源岩资源潜力的客观评价。通过高压釜—封闭式金管的生烃热模拟实验,分析烃源岩生烃过程,对比山1段和山2段的生烃潜力,生烃动力学拟合证明实验结果真实可靠。实验结果表明:①甲烷和非烃类气体具有相似产出特征,重烃气C2-5和液态烃具有相似产出特征;②当RO值为0.80%~1.08%时,液态烃达到产率峰值;当RO值达到1.47%~1.81%时,重烃气C2-5达到产率峰值;当RO值超过3%,重烃气C2-5几乎全部裂解,干燥系数接近1;③实验表明山2段属于更好的烃源岩,结合页岩气井地化数据,进一步确认山2段生烃潜力远远超过山1段,研究认为山2段更适合作为鄂尔多斯盆地海陆过渡相页岩气的有利勘探层段。

关键词: 鄂尔多斯盆地, 山西组, 泥页岩, 生烃热模拟, 生烃产物, 生烃潜力

Abstract:

Shale gas resources have a great potential in the southeast of Ordos Basin,the lack of the hydrocarbon generation potential evaluation of Shanxi Formation restricts the objective evaluation about resource rocks potential in this zone.Hydrocarbon products and hydrocarbon generation potential of Shanxi Formation were analyzed by pyrolysis experiments.The following results were obtained,(1)methane and non-hydrocarbon gases show similar yields characteristics,heavy hydrocarbon gas C2-5 and liquid hydrocarbons show similar yields characteristics;(2)liquid hydrocarbon reaches the peak yield as RO between 0.80%-1.08%,heavy hydrocarbon gas reaches peak yield as RO between 1.47%-1.81%.When RO exceeds 3%,heavy hydrocarbon gas is almost completely cracked,the drying coefficient is close to 1;(3)pyrolysis experiments show that the second member reservoir is a better source rock.Geochemical data of shale gas wells further confirmed that the hydrocarbon generation potential of second member reservoir is much larger than that of first member reservoir.It is concluded that the second member reservoir is a favorable exploration stratum of continental shale gas in Ordos Basin.

Key words: Ordos Basin, Shanxi Formation, Shale, Pyrolysis experiment, Hydrocarbon products, Hydrocarbon generation potential

中图分类号: 

  • TE122.1

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