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Effects of Cementation and Compaction on Elastic Wave Velocities of Sandstone
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
Compaction and cementation are important properties that influence the elastic wave velocities of sandstone. In this work, we propose a theoretical model to quantify their effects. By relating the compaction rate to the grain coordination number and the cementation rate to the cement layer radius respectively, their effects on the elastic wave velocities can be studied using the Contact Cement Theory (CCT). To validate the proposed model, we measure the P- and S- wave velocities on the synthetic sandstone samples through the ultrasonic pulse transmission method. The theoretical predictions by the proposed model using the sample parameters are then compared to the experimental data, which shows good agreement between them. Furthermore, it also shows that without considering the compaction effects, the velocities can be obviously underestimated.