SDS和THF对甲烷水合物合成影响的实验研究

The Study on Effects of SDS and THF on Methane Hydrate Formation

甲烷水合物的人工合成是实验室内进行水合物模拟地层钻探研究的关键步骤。利用水合物合成及模拟微钻实验系统,分别进行了加入少量十二烷基硫酸钠(SDS)和四氢呋喃(THF)的甲烷水合物人工合成试验。通过对比实验,分析研究了SDS和THF对甲烷水合物生成速度及生成量的影响。实验表明,在纯水体系中加入微量的SDS和THF,不仅能够促进甲烷水合物快速成核,还可以增加甲烷水合物的合成量,从而节省了大量的实验时间,这也便于对含水合物沉积地层钻探钻井液设计和水合物模拟地层微钻实验的深入研究。

The artificial formation of methane gas hydrate is a critical stage for the experimental study on drilling in simulated gas hydrate bearing sediment. A natural gas hydrate formation and mini drilling experimental system was built to conduct methane hydrate formation experiments with addition of small quantity of dodecyl sodium sulfate（SDS） and tetrahydrofuran （THF）. According to the results of the comparative experiment and an analysis of temperature and pressure data acquired during the experiment, the paper investigated the effects of SDS and THF on the formation rate and amount of methane hydrate. The author drew the conclusion that with the micro-scale use of these two additives, the formation of methane hydrate is significantly accelerated, and more methane hydrate is obtained. Thus, a great deal of time needed for experiment is saved, and spontaneously, it may be greatly convenient for further study on drilling fluid design of hydrate bearing sediment and mini drilling test on simulated gas hydrate strata.