Publications

Fracture basement is a very challenging reservoir target. It needs a lot of work to indentify the distribution and orientation of the fracture in the basement. 3D seismic data (P or PS data) is one of the tools that can be used to identify the distribution and orientation of the fracture for a whole survey. In this paper we would like to show the use of the land 3D seismic dataset (P only) for fracture basement identification. The seismic data was acquired using standard acquisition parameter (conventional), however was not acquired for Multi Azimuth (MAZ) or Wide Azimuth (WAZ) processing. The available land 3D seismic dataset was processed on 2012/2013 but it is still not good enough to identify the presence of the fracture in the basement. We proposed to used the MAZ processing flow. The data was processed starting from 1st velocity picking. To reduce processing time, we used the refraction static from previous processing. On the regularization step, we split the data into 4 sector azimuths and process each sector azimuth through the Kirchhoff PSTM until final velocity picking. The main issue in standard 3D land seismic data is a lot of missing trace in bin on offset and azimuth. After azimuth splitting, the number empty bin is getting bigger. To fill the empty bin, we analyze the data base on Fresnel zone and spatial analysis and calculate the maximum of bin size on the basement area. The maximum bin size will be used as an input for the flex binning parameters. In the end, we created two different outputs from MAZ processing. The first output is PSTM on each sector azimuth and the second output is azimuth stacking. We compared the results with the previous processing. We also created a comparison in the basement area by using some seismic attributes.