论文部分内容阅读
在深入研究影响岩石扩散系数因素的基础上，本文从理论和实测数据中确定出岩石扩散系数与其孔隙率之间的相关关系。并通过孔隙率与声波时差之间的相关关系，建立了岩石扩散系数与声波时差之间的函数关系。根据上述关系利用声波时差资料研究了塔里木盆地塔中地区石炭系泥岩扩散系数，其结果表明，该方法不仅可以获取大量的岩石扩散系数值，而且可以把岩石扩散系数的研究扩展到平面上。对于准确评价泥岩阻止扩散相天然气能力和估算天然气扩散都具有重要意义。
On the basis of deeply studying the factors that affect the rock diffusion coefficient, this paper determines the correlation between the rock diffusion coefficient and its porosity from the theoretical and measured data. Through the correlation between porosity and acoustic time difference, the function relationship between rock diffusion coefficient and acoustic time difference is established. According to the above relationship, the diffusion coefficient of Carboniferous mudstone in Tazhong area of Tarim Basin was studied by using acoustic time-difference data. The results show that this method not only can obtain a large amount of rock diffusion coefficient, but also extends the study of rock diffusion coefficient to the plane. It is significant to accurately evaluate the capability of mudstone to prevent the natural gas from diffusive phase and to estimate the gas diffusion.