Compressional wave velocity of hydrate-bearing bentheimer sediments with varying pore fillings. (27th December 2018)

• Record Type: Journal Article
• Authors: Sadeq, Dhifaf; Alef, Khalid; Iglauer, Stefan; Lebedev, Maxim; Barifcani, Ahmed
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 52(2018)
• Page Start: 23193
• Page End: 23200
• Publication Date: 2018-12-27
• Subjects: Compressional wave velocity -- Gas hydrates -- Bentheimer sediments -- Tetrahydrofuran -- P-wave measurement -- Acoustic velocity; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.10.169
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A potential alternative energy resource to meet energy demands is the vast amount of gas stored in hydrate reserves. However, major challenges in terms of exploration and production surround profitable and effective exploitation of these reserves. The measurement of acoustic velocity is a useful method for exploration of gas hydrate reserves and can be an efficient method to characterize the hydrate-bearing sediments. In this study, the compressional wave velocity (P-wave velocity) of consolidated sediments (Bentheimer) with and without tetrahydrofuran hydrate-bearing pore fillings were measured using the pulse transmission method. The study has found that the P-wave velocity of consolidated sediments increase with increasing hydrate formation and confining pressure. Of the two samples tested, the increase in wave velocity of the dry and hydrate-bearing samples amounted to 27.6% and 31.9%, respectively. Interestingly, at the initial stage of hydrate formation, there was no change in P-wave velocity, which was followed by a steady increase as the hydrate crystals began to agglomerate and then it increased rapidly to a constant value, suggesting that the test solution had converted to a hydrate solid. Highlights: P-wave velocity of sandstone with and without hydrate-bearing pore fillings were measured. Tetrahydrofuran was used as a hydrate former. P-wave velocity of Bentheimer sandstone increase with increasing hydrate formation and confining pressure.