Technical Content

A flexible Radon modelling algorithm using time-frequency sparseness weights is introduced. The method may be used for a number of applications and combines the dealiasing and time resolution benefits of existing methods. Compared with a frequency domain sparseness approach, the proposed method results in ...

The paper gives an overview of a full 4C deblending process and its results up to migration in the case of a real 2D 4C dataset acquired offshore Malaysia. Special emphasis is put on the deblending QCs and the specificities of the deblending flow ...

We have developed a method to jointly depth invert frequency and time domain Airborne EM data in complex topographic and geologic environments, in 2.5D and 3D. Inversion of synthetic and field data show that using AEM data sets with complimentary information (geo-steering) increases the ...

This study explores the predictive capability of an integrated geologic, petrologic, petrophysical and geophysical model based on detailed facies analysis of thirteen sediment cores expanded over 400 wireline log suites and 440 square miles of 3D seismic in the western Powder River Basin, Wyoming.

The economics of unconventional plays can be improved if horizontal wellbores target facies with favorable reservoir and geomechanical properties. An integrated, multi-disciplinary approach has been developed in order to reduce economic risk, facilitate improved and faster decision making and enable more efficient and effective ...

In ocean bottom acquisition, receiver side deghosting is normally done by summing together the hydrophone P and geophone Z data. A prerequisite for this method to work effectively is the precise calibration of geophones to hydrophones, so as to compensate for the differences in ...

Low frequency information is required for quantitative reservoir characterization. Because borehole measurements are often (laterally) sparse and preferential towards reservoir locations, there is much uncertainty on the low frequency models away from well control. Methods to improve the reliability of the low frequency data ...

Migration Velocity Analysis in the subsurface-domain measures velocity errors via (extended) image-domain residuals with respect to an ideal reference image and then updates the velocity model in order to minimize those residuals.Because of the similarity between images with similar extension parameter (shot number, offset ...

In 4D land and especially for Permanent Reservoir Monitoring (PRM), changes of the subsurface induce unwanted signal variations that interfere with the 4D signal recorded from the reservoir. A three-month PRM pilot was carried out for Shell on the Peace River heavy oil field ...