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天然气地球科学 ›› 2009, Vol. 20 ›› Issue (5): 794–800.doi: 10.11764/j.issn.1672-1926.2009.05.794

• 天然气地球化学勘探 • 上一篇    下一篇

烃类微渗漏与宏渗漏的识别及镇巴长岭—龙王沟地区勘探实践

张春林,庞雄奇,梅海,梅博文,林壬子,张艳萍   

  1. （1.中国石油大学（北京）盆地与油藏研究中心，北京 102249；
    2.盎亿泰地质微生物技术（北京）有限公司，北京 100029；
    3.中国石油大学（北京），北京 102249;4.长江大学，湖北 荆州 434023）
  • 收稿日期:2009-04-09 修回日期:2009-06-01 出版日期:2009-10-10 发布日期:2009-10-10
  • 通讯作者: 张春林zhangchunlin_219@163.com E-mail:zhangchunlin_219@163.com
  • 基金资助:

    国家重点基础研究发展计划(“973”)项目“中国西部典型叠合盆地油气成藏机制与分布规律”（编号：2006CB202300）资助.

Identification of Microseepage from Macroseepage and Exploration Practice in Changling Longwanggou Area of Zhenba Block

ZHANG Chun-lin, PANG Xiong-qi,MEI Hai,MEI Bo-wen,LIN Ren-zi,ZHANG Yan-pin   

  1. 1. Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249, China;
    2. AE and E Geomicrobial Technologies (Beijing) Limited Company, Beijing 102200, China;
    3. China of Petroleum, Beijing 102249, China; 4.Yangtze University, Jingzhou 434023, China
  • Received:2009-04-09 Revised:2009-06-01 Online:2009-10-10 Published:2009-10-10

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摘要：

 烃类微渗漏与宏渗漏的识别可提高化探异常解释的正确性，对识别标志研究现状进行了综合分析，表明微生物、罐顶气、酸解烃、土壤气对2类渗漏有不同响应。宏渗漏多具有微生物及烃检测异常指标呈线状分布、烃浓度高、C6+多、烷烃/烯烃值高的特征；而微渗漏多具有微生物异常指标呈散乱分布、烃浓度低、几乎无C6+、烷烃/烯烃值低的特征。对四川盆地南大巴山冲断褶皱带内的镇巴区块长岭—龙王沟地区展开研究，表明龙王沟异常带具有土壤丁烷氧化菌及酸解烃C1—C4异常点线状分布、C1—C4浓度高（>1 000×10-6）、乙烷/乙烯值高（>10）的特征，为宏渗漏，与下伏油气藏可能不垂直对应；长岭复向斜异常带具有土壤丁烷氧化菌异常点散乱分布、C1—C4浓度低（<100×10-6）、乙烷/乙烯值低（<5）的特征，为微渗漏，与下伏油气藏垂直对应。

关键词: 轻烃, 微渗漏, 宏渗漏, 微生物勘探, 酸解烃, 四川盆地, 镇巴区块

Abstract:

The identification of hydrocarbon′s microseepage from its macroseepage could improve the accuracy of interpretation on anomaly geochemical exploration, so we summarize the present research progress about identification marks and pointe out that the indicators, namely soil microbes, headspace gas, acid extraction of soil hydrocarbon and soil gas, appear to be responded differently towards macroseepage and microseepage respectively. The anomalous points of these indicators are linear distribution, high hydrocarbon concentration, more C6+, high alkane alkene ratio where the macroseepage is detected; where the microseepage is presented, the anomalous points of soil microbes are random distribution and seepage hydrocarbon is low concentration, little or no C6+, low alkane alkene ratio. Further investigation on Changling Longwanggou area of Zhenba block of Nandaba fold thrust belt located in western China Sichuan basin show that Longwanggou anomaly zone is of fault macroseepage and may not be vertically above the reservoir, while Changling synclinoria anomaly zone is caused by the microseepage and is vertically above the reservoir. The anomalous samples of soil butane oxidating bacterias andC1—C4from acid extraction of soil are linear distribution, C1—C4 of anomalous samples are highly concentrated (>1 000×10-6）, the alkane/alkene ratios are also high(>10) in Longwanggou anomaly zone while the anomalous samples of soil butane oxidating bacteria are random distribution, values of C1—C4 are low(<1 000×10-6）, the alkane/alkene ratios also are low(<5) in Changling synclinoria anomaly zone.


Key words: Light hydrocarbon, Microseepage, Macroseepage, Microbial survey, Acid-extraction of soil hydrocarbon, Sichuan basin, Zhenba block.

中图分类号: 

  • TE132.4

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