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为了研究不同的产状对沉积物中甲烷水合物形成和分解过程的影响,在砂土中开展了块状、层状、结核状和分散状4种不同产状甲烷水合物的形成和分解实验。实验结果表明,产状对砂土中甲烷水合物形成和分解过程的影响比较明显。在形成过程中,块状甲烷水合物的甲烷气体转化率最高,其次是层状,再次是分散状,结核状最低。分散状甲烷水合物的形成速率最快,其气体消耗速率峰值也最高;块状甲烷水合物的形成过程耗时最长,层状甲烷水合物次之,结核状甲烷水合物再次之,形成过程耗时最短的是分散状甲烷水合物。在分解过程中,块状甲烷水合物的稳定性最好,其次是层状甲烷水合物,接下来是结核状甲烷水合物,稳定性最差的是分散状甲烷水合物。
In order to study the effects of different production regimes on the formation and decomposition of methane hydrate in sediments, the formation and decomposition experiments of four kinds of methane hydrate in massive, lamellar, nodular and dispersed state were carried out in sand . The experimental results show that the effect of occurrence on the formation and decomposition of methane hydrate in sand is obvious. In the formation process, massive methane hydrate methane gas conversion rate is highest, followed by the layered, again dispersed, the lowest in tuberculosis. The formation rate of dispersed methane hydrate is the fastest, and its gas consumption rate is also the highest. The formation process of massive methane hydrate takes the longest time, the layered methane hydrate is the second, and the tuberculosis methane hydrate is the second one, forming process The shortest time is dispersed methane hydrate. In the decomposition process, the bulk of the methane hydrate stability, followed by the layered methane hydrate, followed by tuberculosis methane hydrate, the worst stability is dispersed methane hydrate.