Analysis of the Blackfoot 3C-3D VSP survey

Qi Zhang, Robert R. Stewart, John M. Parkin, and Zandong Sun

ABSTRACT

A 3C-3D vertical seismic profile (VSP) was conducted in November 1995 over the Blackfoot Field, which is located in Township 23, Range 23W4, about 15 kilometers southeast of Strathmore Alberta. The survey was acquired in the PCP 12-16-23-23W4 well. Acquisition of the survey was performed simultaneously with the Blackfoot 3C-3D surface seismic program. A total of 431 surface shots were received by a five-level tool. The simultaneous acquisition of a 3-D surface and borehole data on land is to our knowledge, one of the first of its kind. The processing techniques used here include field data preprocessing, wavefield separation, deconvolution, statics correction, NMO correction and depth-variant mapping and stack for both P-P and P-S data. A 3-D image is produced with reasonable quality compared to other VSP and surface data. The 3C-3D VSP images tie well with the 3C-3D surface seismic and well log synthetics.

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