Technical Content

Building on our earlier Big Data paper at OTC in May 2015, this article in JPT October 2015 continues our push to demonstrate the use of Big Data in an Oil & Gas context. Well data from the UKCS were analysed to identify "bad ...

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 ...

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 ...