We present an efficient and accurate numerical algorithm for the simulation of borehole acoustic experiments. The basis of the approach is a heterogeneous spectral element method applied to acoustic-elastic wave equation. The approach was designed to simulate wave propagation in 3D arbitrary geometry. Due to the use of an unstructured grid and curvilinear element, the spectral element algorithm enables handling tools in a fluid-filled borehole with surrounding geological models of big complexity. We show the advantages of using curvilinear elements vs. linear elements for a simple sonic logging experiment. We illustrate the flexibility of the method by simulating the complex case of a vertical borehole illuminated by a sonic tool in a nearby horizontal well.
|Number of pages||5|
|Publication status||Published - 2019|
|Event||88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018 - Anaheim, United States|
Duration: 14 Oct 2018 → 19 Oct 2018
|Conference||88th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2018|
|Period||14/10/18 → 19/10/18|