Analytical solution of coal-bed methane migration with slippage effects in hypotonic reservoir

Using theoretical analysis, the single-phase gas seepage mathematical model influenced by slippage effects was established. The results show that the pressure of producing wells attenuates more violently than the wells without slippage effects. The decay rate of reservoir pressure is more violent as the Klinkenherg factor increases. The gas prediction output gradually increases as the Klinenberg factor increases when considering gas slippage effects. Through specific examples, analyzed the law of stope pore pressure and gas output forecast changing in a hypotonic reservoir with slippage effects. The results have great theoretical significance in the study of the law of coal-bed methane migration in hypotonic reservoirs and for the exploitation of coal-bed methane.

宏观审慎政策要素的国际经验

近期,IMF、FSB与BIS联合发布了题为《宏观审慎政策要素的国际经验》的工作论文,从宏观审慎政策的定义、目标、范围、制度安排、实践操作及国际合作等方面阐述宏观审慎政策的国际经验。文章认为,在制度设计与执行方面,构建宏观审慎政策框架需授权、治理、问责等方面的制度基础;为处置时间与结构维度上的潜在脆弱性,需广泛的政策工具,并在事前权衡政策成本与收益,事后评估政策有效性。在政策工具有效性方面,资本类工具可在衰退周期提高信贷增速,增强机构适应力,但在繁荣周期作用有限;部门类工具通过对特定部门设置额外缓冲要求提高其适应力,但对信贷增长的效果各异。在国际监管协调方面,跨境渗出效应的存在要求加强国际监管合作。