1. Fracture Parameters Inversion Based on Azimuth Anisotropic Elasitc Impedance
- Author
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Y.Y. Zhang, D.M. Zheng, H.Y. Yue, D.X. Yin, Z.D. Sun, L.J. Zhang, and J.F. Han
- Subjects
Azimuth ,Regional geology ,Hydrogeology ,Engineering geology ,Mathematical analysis ,Inverse transform sampling ,Geophysics ,Economic geology ,Anisotropy ,Electrical impedance ,Geology ,Physics::Geophysics - Abstract
A new fracture parameters inversion method based on azimuth anisotropic elastic impedance in HTI media is introduced in this paper. The azimuth anisotropic elastic impedance formula derived from Connolly’s elastic impedance theory and Ruger’s equation is deduced. The explicit relation of elastic impedance and fracture parameters (fracture density and direction) is built. The formula is further used to form an integral workflow of fracture parameters inversion based on azimuth anisotropic elastic impedance. Particularly, the EI inversion for each azimuth is constrained by the well data of anisotropic elastic impedance. The proposed method is successfully applied in both numerical data with different SNR and field data in the Tarim Basin. It is proved that the fracture parameters can be efficiently inverted, which shows an excellent stability in fracture density extraction even for low SNR data. This method provides a new idea and approach for the fractured reservoir prediction.
- Published
- 2014