三维实验装置中甲烷水合物沉积物注剂分解规律分析  

An analysis of methane-hydrate sediment dissociation by inhibitor injection in a three-dimensional reactor

作　　者：庞维新 李清平 孙福街 陈光进[3] 杨新[3] 

机构地区：[1]中海油研究总院 [2]中海石油(中国)有限公司 [3]中国石油大学(北京)

出　　处：《中国海上油气》2013年第1期37-42,共6页China Offshore Oil and Gas

基　　金：国家高技术研究发展计划(863计划)(编号:2006AA09A209)部分研究成果

摘　　要：为了充分了解水合物沉积物的分解规律,在高100 mm、内径300 mm的三维实验装置中,利用20～40目的石英砂与甲烷模拟合成水合物沉积物样品,采用单井吞吐注剂法进行了水合物沉积物分解实验研究。研究结果表明:水合物以注剂井为中心从底部由内向外逐渐分解;注入的化学剂浓度越高,水合物分解速率越快;化学剂的类型对水合物分解速率的影响主要取决于它们对水合物相平衡影响程度的大小;低渗透率型水合物沉积物直接采用注剂的方法并不可行,需要扩大体系的渗透率后才能进行注剂分解。In order to understand sufficiently the dissociation mechanism of methane-hydrate sedi- ments, some experiments of hydrate sediment dis- sociation were performed by an approach of single- well inhibitor injection in a three-dimensional reac- tor that is 300 mm in internal diameter and 100 mm in height. The hydrate sediment was prepared with quartz sand of 20~40 mesh. The experimental re- suits indicated that： （1） The hydrate was dissocia- ted firstly at the bottom of the injection well, and then the dissociation gradually expanded away from the well; （2） The higher the injected inhibi- tor concentration, the faster the hydrate dissocia- tion rate, and the effect of any type of inhibitor on hydrate dissociation rate mainly depends on its effect on the phase equilibrium of hydrate; （3） An approach to directly inject inhibitor may be not fea- sible for the low-permeability hydrate sediment, and it is needed to improve the permeability of hy- drate sediment before making hydrate dissociation by inhibitor injection.

关 键 词：甲烷水合物沉积物 注剂法 三维实验装置 低渗透率 分解规律 

分 类 号：P744.4[天文地球—海洋科学]