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Fig 7 Wireline log data for Well-05 showing suite of logs. The sonic curves at the far left show the original curve in red and the effect of the correction, shown in black. Fig 9: Checkshot correction applied to sonic log data. The acoustic impedance cube was utilized as a secondary variable steering the pore volume distribution in the reservoir model. The well log data was evaluated and rock attribute cross-sections were created.
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The 3D density cube was transformed into a series of probability cubes and used in subsequent facies modelling. ated a check shot from first arrivals of borehole geophones from the ZOVSP.
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Despite limitations to data quality the pre-stack inversion results show a good match to well data and yield high correlation coefficients with reservoir properties. We used the software package HRS-geoview by Hampson-Russell (version 10.0. The inversion requires an input information about the seismic wavelet, the geometric structure from structural seismic interpretation, interpreted horizons and a prior model based on well log impedance. Cubes of density, acoustic and shear impedances were calculated for reservoir characterisation by pre-stack simultaneous inversion. The post stack inversion was performed using Hampson-Russell Suite HRS version 10.0.2.package. It was noted that differences in impedance of the two data types mainly originate from the better imaged 3D data while 2D lines show higher noise levels. Tahapan Penelitian Penelitian ini dilakukan dengan beberapa tahapan diantaranya : Tahap Persiapan, Tahap Pengolahan Data. Adapun perangkat yang digunakan ialah Software Hampson Russell CE.8 dan Petrel 2008. This study initiated a post-stack, seismic inversion which was applied on both, 2D lines and sections from the 3D cube. checkshot merupakan data kedalaman dan waktu tempuh (TWT) digunakan untuk mengkonversi data sumur dalam domain kedalaman ke domain waktu. Several wells with standard wireline logs penetrate the reservoir. Seismic data was acquired as a high resolution 2D survey and then processed in 2D and subsequently into a pseudo 3D cube. The limestone reservoir rocks are of Eocene age. Structurally, the studied field is defined by a NW-SE oriented horst block.
Inversions of 2D and 3D seismic datasets were successfully applied to study a carbonate reservoir in the Thrace basin, North-Western Turkey.
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