摘要
该文简要介绍了热失重法计算砂岩孔隙度的原理,利用地化样品热解前后的质量变化,推导出砂岩孔隙度计算公式;分析了泥质、钙质胶结物对孔隙度计算值的影响,建立了相应的校正计算公式;实例证明热失重法与室内测定孔隙法的原理是相同的、数值是接近的,该方法是一种经济、快速的砂岩孔隙度测定方法。
This paper describes the principle of heat weight loss method to compute sandstone porosity,deduces the equation for determination of sandstone porosity by mass variation in geochemical sample pyrolysis,analyses the influence of argillaceous and calcareous cement and sets up the corresponding corrected equation.The example demonstrates the theory for evaluation of porosity by heat weight-loss method is the same as that in the laboratory,the results are approximate.It is an economic and rapid method to measure sandstone porosity.
关键词
砂岩
孔隙度
热失重法
地化录井
泥质
钙质
校正
Sandstone,Porosity,Heat Weight-loss Method,Geochemical Logging,Argillaceous,Calcareous,Correction
