东北石油大学学报2013，Vol.37Issue(1)：91-96,6.DOI:10.3969/j.issn.2095-4107.2013.01.014
页岩气藏数值模拟及井底压力动态分析
Simulation of shale-gas reservoirs and dynamic analysis of bottom hole pressure
摘要
Abstract
In order to deal with the dynamic of bottom hole pressure and its influencing factors in the production process of shale gas reservoir, a mathematical model of shale gas reservoir with dual-porosity and dual-permeability was established. This model is based on the law of conservation of mass, considering the desorption and the pressure sensitivity. Numerical model then can be obtained by means of finite differeace approach. Through the analysis of influences on the bottom hole pressure double logarithm curve which can be attributed to desorption, Langmuir volume, Langmuir pressure, adsorption time, pressure sensitive, it finally comes to the conclusions that the more absorbed gas in the well, the slower pressure drops, the later boundary to be touched. The increase of Langmuir volume or Langmuir pressure makes the concave part of the double logarithm curve of the bottom hole pressure more obvious. The smaller the time constant of adsorption is, the better the diffusion effects, and the easier to achieve the section of integral radial flow. The greater the pressure sensitivity coefficient, the more obvious double logarithm curve up. The results of the study for shale gas reservoir development has a guiding significance.关键词
页岩气/双孔双渗/解吸/应力敏感/井底压力Key words
shale gas/ dual-porosity and dual-permeability/ desorption/ stress sensitivity/ bottom hole pressure分类
能源科技引用本文复制引用
李清泉,王新海,尹虎,任飞,王珊珊,张磊..页岩气藏数值模拟及井底压力动态分析[J].东北石油大学学报,2013,37(1):91-96,6.基金项目
国家油气重大专项(2011zx05015) （2011zx05015）
中国石油天然气集团公司项目(2011A3604) （2011A3604）
