Technical Content

In seismic land acquisition, harmonic–noise in vibrator ground-force has always been a major limitation in terms of data quality and productivity. In high productivity acquisition, vibrator distortion is usually prevented by waiting enough time between successive shots. Otherwise, it has to be reduced during ...

Combined with recent receiver deghosting strategies, the use of multi-level sources can provide further uplift to the ever broadening bandwidth of seismic data. While multi-level sources help mitigate source notches in the output spectrum, the resulting emitted wavelet still exhibits residual ghosts, directivity, and ...

An integrated, multi-disciplinary approach of correlating core facies to petrophysical wireline facies to seismic facies for tight unconventional sandstones is presented along with the results of a simultaneous, geostatistical seismic inversion. This integrated approach results in an improved understanding of the spatial distribution, geometry ...

Time-lapse seismic surveys are intended to measure changes in the subsurface related to reservoir production. Accurately estimation of the reservoir-level requires prior corrections to layers above the reservoir, including the water layer. Water layer changes can be attributed to ocean tides and water velocity ...

Subsalt imaging is challenging at the Thunder Horse field in the Gulf of Mexico primarily because of the salt canopy overlying roughly 75% of the structure. Since the Thunder Horse discovery, advancements in seismic acquisition techniques and imaging technologies have helped improve subsalt imaging ...

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 ...