声速法和电极电位法在无烟煤测井中的应用

具有低阻的无烟煤和砂泥质岩石,它们的密度和导电性分別与声波传播速度和电极电位有着对应的联系,用声速法和电极电位法可对无烟煤作出评价。这是两种有用的无烟煤测井新方法。从测井资料上不仅可以找出煤层的埋深、厚度和结构,而且声速测井还是一种有用的岩层孔隙度探测方法,是解决天然状态下的煤质问题的有效途径。本文较详细地讨论了解释煤层的方法和可靠程度以及岩层孔隙度的估算及其校正。

APPLICATION OF SONIC VELOCITY AND ELECTRODE POTENTIAL METHODS IN THE ELECTROLOGGING OF ANTHRACITE COALFIELD

The density and electric conductivity of low-resistance anthracite and psammiticpelitic rocks are related with the sonic velocity and electrode potential respectively, so the sonic logging and electrode potential logging can be used to evaluate the anthracite. These are two kinds of new methodology useful for anthracite logging. We can not only find out the depth, thickness and the texture of the coalbeds from the logging data, but also the sonic logging can be used to detect the porosity of rock formation, which is an efficient approach to solve quality problem of coal in natural state. This paper gives a detailed discussion on the standard method of interpreting the coalbed and the reliability as well as the estimation and correction of the porosity of rock formation.