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Abstract

Summary

We present the approach and initial QC results of the dual-signal processing of VSP data acquired using semipermanent DAS technology during a baseline survey of a CO2 injection- monitoring project in the Kizildere (Turkey) geothermal-production reservoir. The data were recorded in the framework of the SUCCEED project in two wells using a high-sensitivity engineered fibre with the cable suspended in the vertical cased wells. The source was a new electric seismic vibrator operated at the surface with a 3D configuration, supported with measurements on two bi-axial geophone lines.

Good-quality VSP results were obtained during the initial QC performed by in-field and remote control and from the prompt data processing after the survey acquisition. The VSP-data processing takes advantage of the dual-field separation method effectively applied with the DAS well data densely sampled every 1 m. This approach enabled us to quickly separate up- going and down-going VSP wavefields. This technique does not require first-arrival picking, which is advantageous for processing extensive 3D-VSP datasets.

The results from sample VSP revealed the reflection information contained in the data, relevant for target characterization. This analysis demonstrates the potential of the dataset for carbonate- reservoir monitoring purposes, to be compared in the future with time-lapse measurements.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.2023629019
2023-09-18
2025-11-11

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References

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Dual-Signal Processing of DAS-VSP Data of the Kizildere Geothermal Field
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.2023629019
/content/papers/10.3997/2214-4609.2023629019
/content/papers/10.3997/2214-4609.2023629019
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