摘要
我国煤层气储层微孔和裂缝发育,储层渗透率、压力及含气饱和度均偏低,煤岩表面常常带有负电荷;为了较好的开发煤层气储层,钻井液应当具有较强的封堵性和抑制性、合理的密度和pH值,较低的表面张力;本文介绍了几种国内外应用较为成功的煤层气钻井液选择。
The micropores and fractures in the CBM reservoir are well developed in China. However,the permeability of reservoir,pressure and gas saturation are relatively low,and the surface of coal and rocks always have negative electric charge. In order to develop CBM reservoir successfully,the drilling fluids should have strong sealing and inhibition properties,reasonable density and pH value,fairly low surface tension. The paper describes several drilling fluids techniques for CBM reservoir at home and abroad which were successfully applied.
出处
《中国煤层气》
2011年第2期24-27,共4页
China Coalbed Methane
关键词
煤层气储层
钻井液
井壁稳定
储层伤害
CBM reservoir
drilling fluid
wellbore stability
reservoir damage
