mCSEM > Reservoir properties prediction

We present an example from the Hoop area of the Barents Sea showing a sequential quantitative integration approach to integrate seismic and CSEM attributes using a rock physics framework. The example illustrates a workflow to address the challenges of multi-physics and multi-scale data integration for reservoir characterization purposes.

A dataset consisting of 2D GeoStreamer® seismic and towed streamer electromagnetic data (survey c in the subfolder back to theory) that were acquired concurrently in 2015 by PGS provide the surface geophysical measurements used in this study. Two wells in the area: Wisting Central (7324/8-1) and Wisting Alternative (7324/7-1S) provide calibration for the rock physics modeling and the quantitative integrated analysis (Alvarez P. et al, 2017)

The area in question covers a significant oil discovery in the Hoop Fault Complex on the Bjarmeland Platform in the Barents Sea, Norway (a).

A densely-sampled dataset consisting of six lines of 2D seismic and towed streamer CSEM data were acquired concurrently in 2015 by PGS (b). The survey area lies in water depths of approximately 400m. Two public domain wells in the area provide calibration for the integrated analysis. Oil bearing sands were encountered in the Realgrunnen interval at well 7324/8-1 (Wisting Central), whereas the same interval was dry in nearby well 7324/7-1S (Wisting Alternative). Two additional wells have been drilled in the immediate vicinity: 7324/7-2 (Hanssen) yielded a small oil discovery, and 7324/8-2 (Bjaaland) was dry. The results from these wells were used to validate and corroborate the accuracy of the reservoir property predictions.

This case study addresses the analysis of the data from line 5001P1009, which provides the best calibration with the well information available in the area

Alvarez, P., A. Alvarez, MacGregor L., Bolivar F.,, Keirstead R. and Martin T., Reservoir properties prediction using controlled-source electromagnetic, prestack seismic, and well-log data: Case study in the Hoop Area, Barents Sea, Norway: Interpretation, Vol. 5,No. 2 (May 2017); p. 1–17, 20 FIGS., 3 TABLES