Traveltime and constrained AVO inversion using FDR PSO

Agarwal, Aayush (Indian School of Mines, Dhanbad) | Sain, Kalachand (CSIR-National Geophysical Research Institute, Hyderabad) | Shalivahan, Shalivahan (Indian School of Mines)


The elastic parameters (Vp, Vs and density) of a multilayered earth can be derived from amplitude versus offset (AVO) data. The problem is non-unique nature, as different combinations of elastic parameters may yield the same AVO response. An attempt has been made to estimate the elastic parameters using a constrained AVO inversion in which the Vp derived from the travel time data (unique in nature) is kept constant during the AVO inversion. Methods based on local linearization fail if the starting model is too far from the true model. FDR PSO, being very robust and proficient in dealing with highly non-linear problems, is used for both the travel time and AVO inversions yielding an improved methodology. The inversion scheme, applied on synthetic data (both noise free and 2% noise added) shows very promising results.

Presentation Date: Tuesday, October 18, 2016

Start Time: 8:25:00 AM

Location: Lobby D/C

Presentation Type: POSTER