地学前缘 ›› 2012, Vol. 19 ›› Issue (3): 259-263.

• 论文 • 上一篇    下一篇

页岩气勘探目标层段优选

林腊梅，张金川，刘锦霞，龙鹏宇，唐玄   

  1. 1. 中国石油大学(华东) 地球科学与技术学院， 山东 青岛 266555 2. 中国地质大学(北京) 能源学院， 北京 100083 3长城钻探工程公司 测井技术研究院， 北京 102206  
  • 收稿日期:2012-03-01 修回日期:2012-04-28 出版日期:2012-05-25 发布日期:2012-05-25
  • 作者简介:林腊梅(1979—)，女，博士研究生，讲师，矿产普查与勘探专业，主要从事非常规油气资源勘探与评价研究。E-mail: llmls@sina.com
  • 基金资助:

    国家自然科学基金项目(41102088);国土资源部全国油气资源战略选区调查与评价专项(2009GYXQ15)

Favorable depth zone selection for shale gas prospecting.

  1. 1. School of Geosciences, China University of Petroleum (Huadong), Qingdao 266555, China 2. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China 3. Logging Technology Research Center of Greatwall Drilling Company of CNPC, Beijing 102206, China
  • Received:2012-03-01 Revised:2012-04-28 Online:2012-05-25 Published:2012-05-25

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摘要：

探讨了页岩气勘探目标层段优选中含气量、埋深及有机碳含量之间的互相补偿关系，并初步提出了相应的参考特征值。Ⅰ型、Ⅱ1型、Ⅱ2和Ⅲ型有机质热进入生气主峰的成熟度门限依次递降，Ro分别为1.2%、0.9%、0.7%和0.5%，相应的深度界限依次减小；对美国页岩气产层实际资料统计分析后认为，要形成工业价值的页岩气，在1 000 m、2 000 m、3 000 m深度页岩含气量至少应达到0.5 m3/t、1.0 m3/t、1.5 m3/t；根据渝东南地区下志留统龙马溪组Ⅰ型有机质页岩研究表明，要达到一定的含气量，有机碳含量与深度应互相补偿。若要含成熟有机质的页岩吸附气含量达到1.0 m3/t，则在500 m、1 000 m、2 000 m深度处TOC值需依次达到1.4%、1.1%和0.9%以上。

关键词: 页岩气, 层段优选, 含气量, 下限值

Abstract:

 In view of existing difficulties in deciding the shale gas favourable region, three important steps are proposed which should be considered especially in vertical，and the characteristic value of  corresponding parameters are put forward. (1)Make the exploration threshold depth clearly and definitely. According to basic model, gas generation threshold of typeⅠ，typeⅡ1，typeⅡ2 and type Ⅲ  organic matters Ro are ordinally 1.2%、0.9%、0.7% and 0.5%.(2)Determine the threshold gas content in different depth. According to the statistical analysis of gas producing shale formation parameters in America, the gas content threshold in 1000 m, 2000 m and 3000 m depth are ordinalty 0.5 m3/t, 1.0 m3/t and 1.5 m3/t. (3)Determine the approved shale. According to the research on Longmaxi shale of Lower Silurian in southeast Chongqing, if we want 1.0 m3/t gas content, the TOC of shale in the depth of 500 m, 1000 m and 2000 m must be ordinally more than 1.4%, 1.1% and 0.9%.

 

Key words:  shale gas, favorable zone selection, gas content, threshold limit

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