Elastic common-receiver Gaussian beam migration of 4C ocean-bottom node data

• DOI: 10.1190/geo2021-0681.1
• Publication Date: 2023-01-20T16:49:43Z
• Authors: Xingchen Shi; Weijian Mao; Xuelei Li; Yubo Yue; Heping Sun
• Keywords: Geophone; Seismic migration; Reciprocity; Gaussian beam; Aliasing; Synthetic data

Four-component ocean-bottom node (OBN) surveys allow for the imaging of subsurface elastic properties oil and gas exploration in deepwater environments. However, sparse acquisition sampling high-quality OBN data is challenging. To alleviate this problem, a common-receiver domain 4C Gaussian beam migration method based on reciprocity transformation that considers monopole/dipole characters sources receivers developed. Common-receiver also computationally efficient an survey wherein number shots usually exceeds geophones. P/S up-/downgoing wavefield decompositions are accomplished “virtual source side” during migration. A decomposition matrix extrapolation formula derived from Kirchhoff-Helmholtz integral with representation Green’s function as superposition beams. The local slant stack performed recordings subjected to more optimized sampling, which less sensitive aliasing. performance synthetic validated using coarse OBNs ultradeepwater environment.