›› 2007, Vol. 28 ›› Issue (S1): 359-365.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

3-D FEM inversion for the in-situ stress field around complex faults based on the theory of constrained optimization

SHEN Hai-chao, CHENG Yuan-fang, WANG Jing-yin, ZHAO Yi-zhong, ZHANG Jian-guo   

  1. College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China
  • Received:2007-03-24 Online:2007-10-25 Published:2014-03-28

Abstract: According to the distribution characteristics of in-situ stresses measured in the fault-block G around complex faults, in-situ stress field is simulated and estimated by establishing numerical model suitable for geological structure of the block G and applying the COFEM method(constrained optimization finite element method) based on the FEM method and the theory of constrained optimization. Simulating results fit with the distribution characteristics of the measurements. In addition, the influence of complex faults on regional in-situ stresses is analyzed by comparing the in-situ measurements with numerical results. It is shown that the distribution of in-situ stresses around faults is mainly affected by its near faults, and depends mainly on the scale of the fault and the distance from the near fault. Because of the influence of the faults, the distribution of in-situ stresses around faults is complicated, especially the terminal portion of faults, the distribution of in-situ stresses field can not be generated by some discrete measuring points. Three-dimensional numerical simulation is very important for us to analyze and estimate the in-situ stresses field.

Key words: complex faults, in-situ stress field, in-situ stress measuring, COFEM method, three-dimensional numerical simulation

CLC Number: 

  • P 642
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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