不同水合物饱和度下渗透率变化特性的实验研究

发布时间：2018-07-03 02:54

本文选题：多孔介质 + 渗透率　；参考：《化工进展》2017年08期

【摘要】：含固体水合物的多孔介质的渗透率是影响天然气水合物藏开采潜力的一个重要参数,多孔介质的渗透率受到水合物占据孔隙的百分比的影响,定量研究水合物的饱和度对渗透率的影响对于天然气水合物试开采工程具有重要意义。本文利用储气罐精确控制注入反应釜的甲烷气量,采用平均粒径为333.21μm的石英砂模拟多孔介质进行实验,开展了一系列不同甲烷水合物饱和度(0~35%)下液相水的渗透率的测量实验。结果表明,水合物饱和度的增加会引起渗透率逐渐下降,这与前人的研究结果一致。并且当水合物饱和度较低时(S_H10%),水合物固体对多孔介质孔隙的堵塞作用更明显,所以渗透率急剧下降;而在相对高的饱和度下(S_H10%),渗透率下降速率逐渐降低。将本实验测量结果与Kozeny颗粒模型、平行毛细管模型和Masuda下降模型[K=K_0(1-S_H)~N,N为整数]进行对比,发现测量结果与Masuda渗透率下降模型N=13的值吻合较好。
[Abstract]:The permeability of porous medium containing solid hydrate is an important parameter affecting the exploitation potential of gas hydrate reservoir. The permeability of porous medium is affected by the percentage of hydrate to pore. Quantitative study on the effect of hydrate saturation on permeability is of great significance for gas hydrate trial production engineering. In this paper, a series of experiments have been carried out to measure the permeability of liquid water under different methane hydrate saturation (0 ~ 35%) by using quartz sand with average diameter of 333.21 渭 m to simulate porous media by using gas storage tank to accurately control the methane gas volume injected into the reactor. The results show that the increase of hydrate saturation will lead to the gradual decrease of permeability, which is consistent with the previous results. When the hydrate saturation is low (SHP 10%), the plugging effect of hydrate solids on the pores of porous media is more obvious, so the permeability decreases sharply, while at relatively high saturation (SSP 10%), the rate of decrease in permeability decreases gradually. The experimental results are compared with Kozeny particle model, parallel capillary model and Masuda descent model.
【作者单位】：中国科学院广州能源研究所中国科学院天然气水合物重点实验室广东省新能源和可再生能源研究开发与应用重点实验室;中国科学技术大学纳米科学技术学院;海洋石油高效开发国家重点实验室;中国海油研究总院;
【基金】：国家自然科学基金(51376183,51676196,51506203) 中国科学院前沿科学重点研究项目(QYZDB-SSW-JSC028) 广东省自然科学基金(2014A030313669) 中国科学院青年创新促进会(2013309)项目
【分类号】：TE312

【参考文献】