摘要
页岩本身既是烃源岩,又是聚集和保存天然气的储层和封盖层,页岩气主要以吸附和游离状态存在于页岩中,与常规天然气有很大的区别。在调研了国内外页岩气研究成果的基础上,分析了页岩储层埋藏、页岩物性、岩石矿物组分等特征,通过对取自四川盆地龙马溪组和筇竹寺组的页岩进行储层流体敏感性实验和页岩毛细管自吸实验,探寻页岩存在的特殊流体敏感性特征。实验结果表明,页岩水敏损害程度为中等偏弱,碱敏程度为中等偏强,具有极强的应力敏感性;页岩毛细管自吸过程中液体沿着缝线扩展,基质岩心自吸不明显。
Shale may be taken as source rock,and reservoir and caprock in which gas can be accumulated and stored.Shaleg as exists mainly in shale by states of adsorption or free,quite different from conventional gas.This paper analyzes the burial characteristics,physical property and mineral composition for shaler eservoir.Some experiments on reservoir-fluid sensitivity and capillary self-absorption have been carried out for Longmaxi and Junzhusi formations,Sichuan Basin,and the special characteristics off luid sensitivity are obtained.Result shows that for shale,the water-sensitive damage is at middle-weak level,where as the alkali-sensitive damage is at middle-strong level.Therefore,shale has strong stress sensitivity.During capillary self-absorption,fluid flows along fractures.Self-absorption in matrix core is unobvious.
出处
《天然气技术与经济》
2012年第5期42-44,69,共4页
Natural Gas Technology and Economy
基金
博士后基金"20090451422"
关键词
四川盆地
页岩
储层流体敏感性
毛细管自吸
Sichuan Basin,shale,reservoir-fluid sensitivity,capillary self-absorption
作者简介
黄玲（1986-），女，工程师，从事非常天然气开发研究工作，E-mail：h109@petrochina.com.cn
