直孔中的岩心倾角及其指向与地层产状相同,而斜孔中的岩心倾角及其指向与地层产状就不同了。一个钻孔在所穿透的地层产状不变的情况下,岩心倾角及其指向则随着钻孔斜度及其方向的不断变化而变化,这种变化是有一定规律可循的。在取心钻孔中可测得岩心倾角,用超声成象测井仪等能测得 Core dip and its orientation in the straight hole are the same as the formation, while the core dip and its orientation in the slant hole are different from the stratum. In the case of a borehole piercing through the formation of the same circumstances, the core angle and its orientation with the drilling slope and its direction of continuous change, this change is a certain rule to follow. The coring angle can be measured in a coring borehole and can be measured with an ultrasonic imaging tool