Recognition and evaluation method of fractures by micro-resistivity image logging in oil-based mud

Home > Archive>Volume 22, Issue 6, 2015 >47-54

Recognition and evaluation method of fractures by micro-resistivity image logging in oil-based mud
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                        Lai JinLai Jin
1.College of Geosciences，China University of Petroleum（Beijing），Beijing City，102249，China；
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Wang GuiwenWang Guiwen
1.College of Geosciences，China University of Petroleum（Beijing），Beijing City，102249，China；2.State Key Laboratory of Petroleum Resource and Prospecting，China University of Petroleum（Beijing），Beijing City，102249，China；
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Zheng XinhuaZheng Xinhua
3.Research Institute of Petroleum Exploration and Development，Tarim Oilfield Company，CNPC，Korla，Xinjiang，841000，China；
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Zhou LeiZhou Lei
3.Research Institute of Petroleum Exploration and Development，Tarim Oilfield Company，CNPC，Korla，Xinjiang，841000，China；
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Xiao ChengwenXiao Chengwen
3.Research Institute of Petroleum Exploration and Development，Tarim Oilfield Company，CNPC，Korla，Xinjiang，841000，China；
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Zhang ChengguangZhang Chengguang
4.School of Geophysics and Oil Resources，Yangtze University，Wuhan City，Hubei Province，430100，China
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Wang KaiWang Kai
1.College of Geosciences，China University of Petroleum（Beijing），Beijing City，102249，China；
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Han ChuangHan Chuang
3.Research Institute of Petroleum Exploration and Development，Tarim Oilfield Company，CNPC，Korla，Xinjiang，841000，China；
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Abstract:

The fracture development features of the Bashijiqike Formation in Keshen gasfield were studied by making full use of core observation and micro-resistivity image logging interpretation. The image logging results collected in oil-based mud for Well Keshen2-2-12 were compared with those in water-based mud，then the differences between water-and oilbased mud in the effect of fracture recognition were summarized. The results show that large aperture fractures can be identified. However，some small aperture fractures are difficult to be seen in the oil-based mud image logging. Generally，the high-angle fractures are easily to be seen，while the low-angle fractures cannot be detected，and the lost of cross bedding information are serious in the oil-based mud imaging. The oil-based mud image logging results can be calibrated with core observations，the caliper logging，acoustic logging and array acoustic logging，and the accuracy of fracture recognition and interpretation will be improved in this way.

Key words:image logging;oil-based mud;fracture;core;caliper logging;acoustic logging;array acoustic logging

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Lai Jin, Wang Guiwen, Zheng Xinhua, Zhou Lei, Xiao Chengwen, Zhang Chengguang, Wang Kai, Han Chuang. Recognition and evaluation method of fractures by micro-resistivity image logging in oil-based mud[J]. Petroleum Geology and Recovery Efficiency,2015,22(6):47~54

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Online: November 12,2015
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