Elastic-impedance inversion based on L1-2 minimization

Wang, Lingqian (State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Lab of Geophysical Exploration, China University of Petroleum–Beijing) | Zhou, Hui (State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Lab of Geophysical Exploration, China University of Petroleum–Beijing) | Wang, Yufeng (State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Lab of Geophysical Exploration, China University of Petroleum–Beijing) | Yu, Bo (State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Lab of Geophysical Exploration, China University of Petroleum–Beijing) | Long, Teng (State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Lab of Geophysical Exploration, China University of Petroleum–Beijing)

OnePetro 

It is necessary to estimate the elastic impedance accurately for three-parameter inversion. However, the elastic impedance can be calculated from the reflectivity with the recursive inversion and the generalized linear inversion (GLI) separately. It has been demonstrated that GLI can improve the shortcomings of recursive inversion with respect to relative and absolute scale of the impedance results. But both of them depend on the accuracy of the reflectivity, so it is necessary to get the reflectivity accurately. Here we use alternating direction method of multipliers (ADMM) and difference of convex algorithm (DCA) to solve the L1-2 minimization problem to obtain a more accurate reflectivity series. Examples have shown the superior performance of the ADMM-L1-2 inversion result over the solution of OMP algorithm.

Presentation Date: Monday, October 15, 2018

Start Time: 1:50:00 PM

Location: Poster Station 11

Presentation Type: Poster