【摘要】 祁连山是世界上中纬度地区最先发现天然气水合物的地区。迄今为止在木里地区的天然气水合物科学实验钻探中已发现多口井赋存天然气水合物,而测井曲线分层是测井解释的第一步重要工作,对于天然气水合物测井评价具有重要的意义。基于木里地区水合物钻探井的测井资料,文中分别利用活度法、极值方差法和沃尔什变换法,从基本原理出发,分别利用不同测井参数,对木里地区的12口井进行自动分层。分析对比三种分层方法在木里地区的分层效果,认为活度法分层效果最优,极值方差法分层效果较差,沃尔什变换法分层效果最差;其中活度分层法分层结果与录井岩心资料吻合度较高,为后续的测井岩性识别和评价奠定基础。更多还原

【Abstract】 The Qilian Mountain is the first area of finding natural gas hydrate in the middle latitudes of the earth.The logging curve stratification is the first important work of logging interpretation,which is of great significance for the evaluation of gas hydrate logging.So far,natural gas hydrate has been found in many wells of scientific experimental drilling in the Muli area.Based on the logging data of the hydrate drilling wells in the Muli area,the authors used the activity method,the extreme variance method and the Walsh transformation method for automatic stratification.According to the basic principle of automatic stratification,different parameters were used for automatic stratification.A comparative study shows that the stratification effect of the activity method is the best,the stratified effect of the extreme variance method is poor,and the Walsh transform method has the worst stratification effect.The stratification results of the activity method are in good agreement with the lithologic data,thus laying the foundation for the lithologic identification and logging evaluation.更多还原