Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (5): 1539-1546.doi: 10.13278/j.cnki.jjuese.201505303

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Evaluation of Formation Heterogeneity Using Lorentz Coefficient of Logging Curves

Yue Chongwang1, Yang Xiaoming2, Zhong Xiaoqin2, Pan Baozhi3, Wang Fei1   

  1. 1. School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China;
    2. Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi'an 710018, China;
    3. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China
  • Received:2015-01-27 Published:2015-09-26

Abstract:

We introduced the calculation principle and the application method of Lorentz coefficient of logging data. Lorentz coefficient and sand ratio were introduced into the logging data processing. Lorentz coefficient and sand ratio of conventional logging curves can be used to evaluate formation effectively. It provided a quantitative formation evaluation method. In order to evaluate the formation heterogeneity, firstly we selected GR logging curve as evaluating curve as it is more sensitive to heterogeneity; secondly, we evaluated the heterogeneity according to Lorentz coefficient combined with sand ratio; and further, we extracted more information on sand structure formation. The formation plane distribution map of Lorentz coefficient and sand ratio is given based on multi-well evaluation results. It can be concluded that the formation of middle region of Zhao-60 block of Sulige gas field of Ordos basin is more homogeneous with good sorting.

Key words: Lorentz coefficient, conventional logging, heterogeneity

CLC Number: 

  • P631.8

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