吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (6): 1969-1975.doi: 10.13229/j.cnki.jdxbgxb201706040

• Orginal Article • Previous Articles     Next Articles

Stratum undulation velocity model optimization algorithm for microseismic monitoring on surface

JIANG Hai-yu1, LIU Yu-hai2, SUN Hai-lin2, XU Ke-bin2, BAI Tian-zeng2, CHEN Zu-bin1   

  1. 1.College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130026, China;
    2.Downhole Services Company BHDC, Tianjin 300457, China
  • Received:2016-09-23 Online:2017-11-20 Published:2017-11-20

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Abstract: The existing method of velocity optimization for surface monitoring only considers the velocity uncertainty of each layer, which bring certain errors in the results of perforation shot relocation. A new method of expanding the solution space on the basis of amplitude stacking is proposed to improve the accuracy of perforation shot localization. In the process of every fast simulated annealing, the velocity uncertainty and location uncertainty of each layer are considered simultaneously. Synthetic data test shows that, compared with the existing method, the proposed method can accurately locate the perforating shot to its actual value, and can effectively improve the location reliability of microseismic events near the perforation. This new method is applied to actual field data processing, and its validity and practicability are verified.

Key words: solid geophysics, velocity model calibration for micro seismic monitoring on surface, velocity uncertainty, layer interface uncertainty, perforation shot relocation

CLC Number: 

  • P631
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