Advertisement

Acta Seismologica Sinica

, Volume 9, Issue 2, pp 317–325 | Cite as

Inversion of breakout data from inclined bore-holes for stress state of the upper crust in Jizhong depression

  • Yan-Xiang Yu
  • Zhong-Huai Xu
Article

Abstract

The forward and inverse problems of studying crustal stress state from breakout data of inclined boreholes are concisely stated. Direction of the maximum horizontal principal stress (compressive) and relative magnitudes of the horizontal stresses to the vertical stress in the upper crust in two regions of the Jizhong depression, the North of China, are obtained by analyzing the breakout data of 6 inclined wells. To get stable results in the analysis we searched for the unknown parameters both forwardly and inversely. The results show that the maximum azimuths of the horizontal principal compressive stresses in the central and southern part of the Jizhong depression are N86°E and N77°E, respectively, while the relative magnitudes of the three principal stresses in the upper crust (about 1000–4000 m) of the depression are variable. In the central part of the Jizhong depression we have foundS H :S V :S h =1.38:1.00:0.57, whereS H ,S V andS h are the maximum horizontal, vertical and minimum horizontal stress, respectively. This indicates that the present stress regime in this area is of strike-slip faulting type. In the southern part of the depression we have obtainedS H :S V :S h =0.80:1.00:0.62, indicating a normal faulting stress regime in the shallow part of the crust.

Key Words

breakout stress state Jizhong depression inclined borehole 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bell, J. S. and Gough, D. I., 1979. Northeast-Southwest compressive stress in Alberta: evidence from oil wells.Earth Planet. Sci. Lett.,45: 475–482.CrossRefGoogle Scholar
  2. Cornet, F. H. and Burlet, D., 1992. Stress field determinations in France by hydraulic tests in boreholes.J. Geophys. Res.,97: 11829–11849.Google Scholar
  3. Computation Center of Chinese Academy of Sciences, 1987. A package for statistical analysis of stochastic data. 282pp (in Chinese).Google Scholar
  4. Ding, J. M. and Liang, G. P., 1985. Stress measurement by hydraulic fracturing in oil-wells of North China.Acta Seismologica Sinica,7: 363–373 (in Chinese).Google Scholar
  5. Gao, A. J., Xu, Z. H. and Chen, J. G. 1991. Horizontal principal stress axes in Sichuan basin deduced from oil-well breakouts.Acta Seismologica Sinica,4: 209–217.Google Scholar
  6. Gao, A. J., Xu, Z. H. and Zhang, D. N., 1993. Present tectonic stress field of Karamay oil field.Acta Seismologica Sinica,15 (Supp.): 598–606 (in Chinese).Google Scholar
  7. Huang, Y. R., Xu, Z. H. and Gao, A. J.,et al., 1994. Study on tectonic stress of Zhongyuan oil field with wellbore breakout data.Acta Seismologica Sinica,7: 251–261.Google Scholar
  8. Li, F. Q., Zhang, B. C. and Su, K. Z.,et al., 1993. Reservor induced earthquake risk in the Yangtze gorges dam area in situ tests in borehole at Maoping and analysis. Beijing: Seismological Press, 210pp (in Chinese).Google Scholar
  9. Moos, D. and Zoback, M. D., 1990. Utilization of observation of well bore failure to constrain the orientation and magnitude of crustal stresses: Application to continental, deep sea drilling program boreholes.J. Geophys. Res.,95: 9305–9325.Google Scholar
  10. Qian, W. and Pedersen, L. A., 1991. Inversion of borehole breakout orientation data.J. Geophys. Res.,96: 20093–20107.Google Scholar
  11. Xu, Z. H., Yan, M. and Zhao, Z. H., 1983. Evaluation of the direction of tectonic stress in North China from recorded data of a large number of small earthquakes.Acta Seismologica Sinica,5: 268–279 (in Chinese).Google Scholar
  12. Ye, H.et al., 1985. The North China basin: An example of a multiply rifted intraplate basin.Tectonics,4: 153.Google Scholar
  13. Yu, Y. X. and Xu, Z. H., 1994. A study on orientations of horizontal principal stress in Jizhong depression using borehole breakout data.Petroleum Exploration and Development.21(2): 48–55 (in Chinese).Google Scholar
  14. Zeng, R. S., Zhu, L. P. and He, Z. Q.et al., 1991. A seismic source model of the large earthquakes in North China extensional basin and discussions on the genetic processes of the extensional basin and earthquakes.Acta Geophysica Sinica,34: 288–301 (in Chinese).Google Scholar
  15. Zoback, M. D.et al., 1985. Well bore breakouts and in situ stress.J. Geophys. Res.,90: 5523–5530.CrossRefGoogle Scholar

Copyright information

© Acta Seismologica Sinica 1996

Authors and Affiliations

  • Yan-Xiang Yu
    • 1
  • Zhong-Huai Xu
    • 1
  1. 1.Institute of GeophysicsState Seismological BureauBeijingChina

Personalised recommendations