Abstract. A sparse 3D seismic survey was acquired over the Blötberget iron oxide deposits of Ludvika Mines in south-central Sweden. The main aim to delineate deeper extension mineralisation and better understand its nature associated fault systems for mine planning purposes. To obtain a high-quality image depth, we applied time-domain acoustic full-waveform inversion (FWI) build high-resolution...

In this work, we present an efficient parallel implementation of a depth migration RTM (Reverse Time Migration) method to obtain a seismic image. This migration technique is based on the parallel solution of the acoustic wave propagation in 2D using a finite difference scheme. We have implemented a domain decomposition on the geological section and exploit an efficient asynchronous communicatio...

Wavefield energy can be measured by the so-called energy norm. Using this norm, we propose an imaging condition that represents the total reflection energy and accounts for wavefield directionality in space-time, thus enabling us to attenuate backscattering artifacts in reverse-time migration (RTM). This imaging condition has the flexibility to attenuate any selected angle, and by exploiting th...

Improving the accuracy and efficiency of numerical simulation ground penetrating radar (GPR) becomes a pressing need with rapidly increased amount inversion data growing demand for migration imaging quality. In this article, we present spectral element time-domain (SETD) procedure GPR forward modeling further apply it to reverse time (RTM) complex geoelectric models. This approach takes into ac...

Reverse time migration (RTM) is a technique used to obtain high-resolution images of underground reflectors; however, this method computationally intensive when dealing with large amounts seismic data. Multi-source RTM can significantly reduce the computational cost by processing multiple shots simultaneously. However, multi-source-based methods frequently result in crosstalk artifacts migrated...

HOUSTON–Technology advances such as wide-azimuth/full-azimuth (WAZ/FAZ) acquisition, reverse-time migration (RTM) and iterative salt imaging in model building have greatly improved subsalt image quality. In the Gulf of Mexico, steeply dipping three-way closures are familiar subsalt targets. However, despite these imaging improvements, some of these targets remain poorly imaged. The fundamental ...

Infrasound data are routinely used to detect and locate volcanic other explosions, using both arrays single sensor networks. However, at local distances (<15 km) topography often complicates acoustic propagation, resulting in inaccurate travel times leading biased source locations when assuming straight-line propagation. Here we present a new method, termed Reverse Time Migration-Finite-...

Abstract We applied a novel method of passive seismic reflection imaging to actual local earthquake data collected by dense network in the Kanto region, Japan. This method, which implements reverse time migration (RTM), is based on cross-correlation wavefields that are extrapolated forward and backward from receiver locations using passively observed records. Using multiple reflections between ...

Conventional one way migration methods exclude turning waves and multiples. We propose an algorithm that uses multiple passes to extend the one way method to efficiently include these wavepaths. A comparison of the images produced by the regular one way algorithm, RTM, and the new method, shows that this new method can significantly improve the image in regions of interest, and in certain situa...