董景海,张继伟,王显东,董忠良,王志国,王涛,汪立东,赵林海
DONG Jinghai,ZHANG Jiwei,WANG Xiandong,DONG Zhongliang,WANG Zhiguo,WANG Tao,WANG Lidong,ZHAO Linhai

• 1:中国石油大庆油田有限责任公司勘探事业部
• 2:中国石油大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

为了搞清四川盆地仪陇-平昌地区凉高山组页岩生烃特征与页岩油资源潜力，利用物质平衡、热模拟实验、盆地模拟方法开展页岩原始生烃潜力、生排烃效率、生烃量研究和基于成因法及体积法原理的页岩油资源量估算，并完成页岩油资源潜力区带划分。结果表明：仪陇-平昌地区凉高山组页岩有效厚度大（40～80 m）、有机质类型较好（Ⅱ型）、丰度中等（w(TOC)为0.50%～3.39%）、成熟度高（R_o为1.0%～1.9%）；页岩原始氢指数平均为522 mg/g，当生烃转化率为70%～95%、镜质体反射率为1.04%～1.72%时，具备大量生油条件；采用有机碳-氢指数公式法、盆地模拟方法估算出研究区凉高山组页岩生烃量分别为92.26×10~8、94.02×10~8 t；采用成因法、体积法估算页岩油资源量分别为25.60×10~8、27.35×10~8 t。研究区位于页岩油、页岩气资源潜力Ⅰ类有利区，中部龙岗-平昌地区为页岩油资源潜力Ⅰ_A类有利区，北部平昌及平昌以北地区为页岩气资源潜力Ⅰ_A类有利区，两者叠合区域为页岩油气资源潜力有利区。研究成果可为同类型页岩生烃特征及页岩油资源潜力研究提供新思路。
In order to clarify hydrocarbon generation characteristics and shale oil resource potential of Lianggaoshan Formation shale in Yilong-Pingchang area of Sichuan Basin, material balance method, thermal simulation experiment and basin simulation method are used to conduct the research on the original hydrocarbon generation potential, hydrocarbon generation and expulsion efficiency and hydrocarbon generation, as well as shale oil resource estimation based on the principles of genesis and volume, and the division of shale oil resource potential zones is completed. The results show that Lianggaoshan Formation in Yilong-Pingchang area shale has large net pay thickness(40～80 m), favorable organic matter type(Type Ⅱ), moderate abundance(w(TOC) of 0.50% ～ 3.39%) and high maturity(R_o 1.0% to 1.9%). The average original hydrogen index of shale is 522 mg/g. Conditions for oil generation are abundant when the hydrocarbon generation conversion rate is 70%～95%, and the vitrinite reflectance is 1.04%～1.72%. Hydrocarbon generation of Lianggaoshan Formation shale in studied area estimated by the organic carbonhydrogen index formula method and basin simulation method are 92.26×10~8 and 94.02×10~8 t, respectively. Shale oil resources estimated by the genetic method and volume method are 25.60 ×10~8 and 27.35×10~8 t, respectively. The studied area is located in Class I favorable areas for shale oil and shale gas resource potential. Central LonggangPingchang area is Class I_A favorable area for shale oil resource potential, while northern Pingchang and areas north of Pingchang are Class I_A favorable areas for shale gas resource potential. The overlapping area of the two is favorable area for shale oil and gas resource potential. The research provides new ideas for the study of hydrocarbon generation characteristics of similar types of shale and shale oil resource potential.

关键词(KeyWords)： 页岩油;页岩气;生烃特征;资源潜力;凉高山组;仪陇-平昌地区;四川盆地
shale oil;shale gas;hydrocarbon generation characteristics;resource potential;Lianggaoshan Formation;Yilong-Pingchang area;Sichuan Basin

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司科技重大专项“陆相页岩油规模增储上产与勘探开发技术研究”（2023ZZ15）

作者(Author): 董景海,张继伟,王显东,董忠良,王志国,王涛,汪立东,赵林海
DONG Jinghai,ZHANG Jiwei,WANG Xiandong,DONG Zhongliang,WANG Zhiguo,WANG Tao,WANG Lidong,ZHAO Linhai

DOI: 10.19597/J.ISSN.1000-3754.202408041

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