井下电视成像技术研究

随着测井技术的不断进步，井下电视成像测井技术也取得突飞猛进的发展，本文介绍了一种新的井下电视成像技术——基于数字视频体制的井下电视实时成像测井技术：由摄像头拍摄的井下图像经模数转换和压缩处理，由3000米普通测井电缆传输到地面；在地面解压、视频转换然后显示或存储。本系统的数字传输采用相位连续的FSK调制，传输速率达到IMBPS，是目前最高的传输速率：地面采用软解调技术实现数据解调。

Research of Downhole Video Imaging Technology

With the continual progress of downhole logging technology, the technology of downhole video logging has been greatly developed. This paper described a new video imaging technology of downhole-a video reahime imaging logging technology of downhole based on digital video system. The downhole picture captured by camera is processed by the analog to digital conversion and data-compression, and then translated to the ground through the general logging cable of 3,000 meters,after that it is decompressed and video-converted as well as displayed or stored. FSK modulation with continuous phase is used for digital transmission in this system; the transmission speed reaches to 1Mbps, and is the fast transmission speed at present. Soft demodulation technology is adopted on the ground system to realize the data demodulation.