测量井径,是我国煤田测井史上开展较早的方法之一。但因井径不能直接分辨煤岩,,没有得到重视,使井径工作的开展受到限制。因此,不少测井队,多年来处于时测时停的状态。笔者从事测井工作多年,深感测量井径的必要性,井径数据已成为定性、特别是定量解释不可缺少的资料。 Measuring borehole diameter is one of the earlier methods of coal well logging in our country. However, due to the diameter can not directly distinguish between coal and rock, did not get attention, so that the work carried out well diameter restrictions. Therefore, many logging teams have been in a state of stopping when measured over the years. The author has been engaged in well logging for many years and has deeply felt the necessity of measuring the caliper. The caliper data has become qualitatively indispensable, especially for quantitative interpretation.