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| 页岩气藏运移机制数学表征及扩散对产能的影响 |
| Mathematical Characterization of Shale Gas Reservoir Transport Mechanisms and Productivity Influenced by Knudsen Diffusion |
| 投稿时间：2017-11-07 修订日期：2017-11-07 |
| DOI： |
| 中文关键词: 页岩气藏 Knudsen扩散 双重介质 |
| 英文关键词: shale gas reservoir Knudsen diffusion dual porosity medium |
| 基金项目:国家科技重大专项“大型油气田及煤层气开发”下属项目“四川盆地及周缘页岩气形成富集条件、选区评价技术与应用”（编号：2017ZX05035004） |
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| 中文摘要: |
| 基于双重介质，建立基质和裂缝的运动方程，基质中考虑黏性流、Knudsen扩散作用，采用Langmuir等温吸附方程考虑气体分子在基质孔隙的吸附与解吸附作用；裂缝中考虑黏性流、和Knudsen扩散；在此基础上建立基质-裂缝的双重介质模型，采用有限元方法对模型求解。同时，通过Knudsen扩散的质量流量公式，研究孔隙半径、压力和温度的变化对质量流量的影响，并绘制是否考虑Knudsen扩散的参数图版。 |
| 英文摘要: |
| Based on dual porosity medium, the kinematic equations of matrix and fracture were build. Viscosity flow, Knudsen diffusion and gas adsorption-diffusion in pore were considered in matrix. Viscosity flow and Knudsen diffusion were considered in fracture. Matrix-fracture dual porosity model was established and calculated by finite method. Meanwhile, study the influence of change pore radius, pressure and temperature on mass flow through mass flow rate formula of Knudsen diffusion, establish the plate whether to consider the Knudsen diffusion |
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