摘要
页岩气藏具有自生、自储、自封闭的成藏特点，页岩气储层孔隙结构复杂、类型多样，具有储集流体和提供流动空间的双重作用，复杂的孔隙结构决定了页岩气渗流机理的复杂多样，然而渗流机理是影响页岩气开采的关键。从页岩储层孔隙结构入手，对不同尺度孔隙结构主导的5种渗流机理进行了深入分析。在此基础上，结合页岩气储层物性特征、相渗特征和吸附特征，重点分析了渗吸吸入作用和非达西渗流对页岩气开采的影响。结果表明，非达西渗流的存在有助于页岩气开采，渗吸吸人作用会严重影响页岩气的开采。
Gas-shale reservoirs are featured by self generating, self preserving and self sealing, with complex pore structure and diverse pore type. The pore can not only preserve fluid but also provide flow space for fluid. Complex pore structure determines the complexity and diversity of flow mechanism of shale gas, however, the flow mechanism is the key affecting factor for shale gas production. Starting from shale pore structure, five flow mechanisms controlled by different-scale pore structures are deeply analyzed. On this basis, the effect of imbibition and non- Darcy flow on shale gas production is analyzed combined with properties of gas-shale reservoir, relative permeability characteristics and adsorption characteristics. The results show that non-Darcy flow in shale gas reservoir is helpful to shale gas development, while the imbibition will seriously affect shale gas production.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2011年第2期80-83,共4页
Petroleum Geology & Oilfield Development in Daqing
关键词
渗流机理
非达西
渗吸吸入
页岩气开采
flow mechanism
non-Darcy
imbibition
shale gas production
