近来,已由GO国际公司研制出一种崭新的数字测井系统。它用车装的计算机系统直接将井下仪器的信号转换成数字形式,然后由计算机控制所产生的信号,以便用事先编好的程序进行诸如刻度、数据打印和现场计算等的全部操作。将数字信号转换成人们熟悉的测井曲线轨迹的工作是由一种独创的激光装置来进行的,该装置可随着计算机发来的信号而给移动着的干记录纸打上许多记号。整个系统叫做直接式数字激光测井仪(DDL)。DDL是GO国际公司的商标。 Recently, a new digital logging system has been developed by GO International. It uses the car’s computer system to convert signals directly from the downhole tool to digital form and then computer-controls the resulting signals to perform all operations such as calibration, data printing, and field calculations using pre-programmed procedures. The job of converting a digital signal to a well-known well trajectory is done by an original laser device that marks moving dry recording paper with signals from the computer. The whole system is called direct digital laser logging (DDL). DDL is a trademark of GO International.