扩散不是页岩气的开采机理  

Diffusion Is Not the Production Mechanism of Shale Gas

作　　者：李传亮[1] 朱苏阳[1] 

机构地区：[1]西南石油大学石油与天然气工程学院,成都610599

出　　处：《新疆石油地质》2015年第6期719-723,共5页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2011ZX05027-003-01)

摘　　要：扩散是浓度差导致的传质现象,流动是压力差导致的传质现象。浓度是对溶液而言的,纯净物不存在浓度的概念,也不存在扩散现象。若把页岩气视为纯净物,则没有浓度的概念,即不会出现扩散现象。若把页岩气视为混合物,开采过程并不会改变气体的组成,因此也不会出现扩散现象。扩散是针对组分而言的,不是针对整个溶液的,因此"页岩气的扩散"这个概念并不正确。页岩气的开采是压力差导致的流动。开采过程监测地层压力,而不监测浓度,因此,研究页岩气的扩散没有任何实际意义。Diffusion is caused by concentration difference, while flow is by pressure difference. Concentration is a concept defined for solutions. Pure substances do not have the concept of concentration, thus there is no phenomenon of diffusion for them. If shale gas is viewed as a pure substance, there is no concept of concentration for it, in other words, diffusion phenomenon won＇ t appear at all in it. If shale gas is viewed as a mixture, its composition won＇ t be changed by any production process, so diffusion may not happen, too. Diffusion is defined for components in a solution, not for the solution, so ＂diffusion of shale gas＂ is not correct as a concept. The production of shale gas is actually the flow caused by pressure difference. During the production, reservoir pressure is usually monitored rather than concentration, hence the research on diffusion of shale gas has not any practical meaning.

关 键 词：页岩气 浓度 扩散 流动 压力 开采 密度 

分 类 号：TE122.2[石油与天然气工程—油气勘探] TE37