Technical Content

If the migration frequency is high (e.g., 50 Hz), reverse time migration (RTM) can be computationally very expensive and hardware demanding for large 3D data sets with large apertures. For this reason, while the vertical wave-propagation grid is chosen to be dense enough to ...

In this paper we analyze the impact of water bottom reflection on the near field hydrophones in shallow water survey, and the error on the reconstruction source signature it introduced. Then we present a de-blending based approach to attenuate such error.

Many frontier basins have widely spaced, vintage 2D seismic data available. The often poor quality of this vintage seismic makes it difficult to derive any meaningful geological information. By using additional complementary datasets, interpretation of the seismic data is often possible. Here we show ...

In this abstract, we calculate the current density during the on-time of a half-sine waveform EM system. Because current is continually regenerated at surface, the classic smoke-ring appearance of current induced in the ground is distorted. We show that current density during the on-time ...

Reservoir analysis of seismic data is performed on migrated seismic images, which represent the spatial variability of the medium’s reflectivity. Intuitively, the process of migration rotates the wavelet so that it is normal to the imaged reflectors. Processes used in reservoir analysis such as ...

Induced polarization (IP) effects observed in airborne time domain electromagnetic (TEM) survey data offer information on the chargeability of the subsurface in addition to conductivity derived from TEM data. However the IP effect is generally weak and obscured in the total TEM response. As ...

We propose a broadband processing workflow that is purely data driven and applicable to both conventional towed and variable depth towed marine streamer data. Three important ingredients of our workflow are highlighted: (1) deghosting; (2) FS-QTomo and A-QTomo; (3) prestack depth Q migration (Q-PSDM) ...

We demonstrate by example, a joint deterministic inversion – facies estimation procedure which makes minimal prior assumptions and obviates the need for the building of a low frequency model (LFM) which interpolates log curves between wells. We then apply the same procedure to geostatistical ...

Contrary to conventional seismic that focuses in a narrow band in middle frequencies, broadband seismic aims at acquiring information within the whole bandwidth emitted by the source. A good knowledge of the source signature is thus of paramount importance in broadband processing. However, the ...