Lithologic Reservoirs ›› 2016, Vol. 28 ›› Issue (1): 106-110.doi: 10.3969/j.issn.1673-8926.2016.01.014

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Influence of ground stress on resistivity logging response in tight sandstone reservoir

Chen Xiaoyu 1， Zhang Chengguang 1， Zhu Lei 2， Tang Jun 1   

  1.  1. Key Laboratory of Exploration Technologies for Oil and Gas Resources ， Ministry of Education ， Yangtze University ， Wuhan 430100 ， China ； 2. Research Institute of Exploration and Development ，PetroChina Tarim Oilfield Company ， Korla 841000 ， Xinjiang ， China
  • Online:2016-01-20 Published:2016-01-20

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Abstract:

Kelasu structural zone in Kuqa Depression belongs to tight sandstone reservoir which is characterized by complex formation conditions and large buried depth. Taking into account the influence of lithology, extrusion stress and other factors, it is difficult to accurately reflect the formation fluid properties by resistivity logging response.Based on studying the influence of magnitude and direction of the ground stress on the resistivity response of reservoir rocks in this area, combined with logging data, the crossplot of formation resistivity and ground stress was plotted, and the statistical data of the direction of horizontal principal stress and the formation fracture orientation in different well fields were sorted by using FMI data. The results show that with the increase of horizontal principal stress difference, the formation resistivity is exponential increasing. The correlation between the formation resistivity and the horizontal principal stress difference is better when the included angle between the direction of horizontal principal stress and the formation fracture orientation is smaller, and the correlation gets worse with the included angle increasing

Key words: geochemistry of element , palaeoenvironment , oiliness , Baikouquan Formation , Mahu Sag

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