气润湿性岩石表面吸附气体性能GAS ADSORBING CAPACITY FOR THE SURFACE OF GAS-WETTED ROCKS
蒋官澄,李颖颖,宣扬,张弘,霍明明
JIANG Guancheng,LI Yingying,XUAN Yang,ZHANG Hong,HUO Mingming
摘要(Abstract)：
油气储层岩石的润湿性不仅影响液体在孔隙中的位置和分布,也会影响气体对岩石的吸附作用。采用AST系列煤层气吸附/解吸实验装置,以石英砂模拟油气储层岩石,对气润湿反转前后甲烷气的吸附能力进行了实验研究和机理探讨。气润湿反转后,石英砂对甲烷气的吸附能力下降大约一个数量级,其根本原因是表面能的降低导致气体吸附能力变弱。
The wettabilities of reservoir rocks not only influence the position and distribution of the reservoir fluids in porous media,but also affect the gas adsorbability of the gas to the rocks.With the help of AST-series CBM adsorbing/desorbing experimental devices,the experimental researches and principal exploration are conducted for the adsorption power of the methane before and after the invertion of the gas wettability.After the invertion,the power of the quartz sand to the methane drops about one grade,the basic reason is that the decrease of the surface energy results in the weakness of the adsorbability of the gas.
关键词(KeyWords)：
气润湿性;储层岩石;表面能;甲烷;吸附
gas wettability;reservoir rock;surface free energy;methane;adsorption
基金项目(Foundation): 国家自然科学杰出青年科学基金项目“多孔介质油气藏气润湿性基础理论研究”(50925414);; 国家自然科学基金项目“复杂地质条件下提高井壁稳定性新方法研究”(51074173)
作者(Author):
蒋官澄,李颖颖,宣扬,张弘,霍明明
JIANG Guancheng,LI Yingying,XUAN Yang,ZHANG Hong,HUO Mingming
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