摘要
随钻钻柱振动声波技术(Vibro-acoustic While Drilling-VWD)自2010年在塔里木盆地塔北地区应用以来,已经录取完成了近30口井的任务,对岩性和地层界面的识别有了较深的认识,取得了一定的研究成果和重大突破。特别是振动声波频谱图的变化规律在多井风化壳界面的识别上有很好的对应关系。通过对钻柱振动声波谱图的分析研究发现:VWD谱图能有效地识别风化壳地层,岩性变化主要反映在谱图的主频、频率分布、频矩曲线以及谱图颜色上。
Vibro-acoustic while drilling(VWD)technique has completed mud logging task of nearly 30 wells since it was applied to northern Tarim Basin in 2010,the deeper understanding has been got to lithology and formation boundary,some achievements in research and major breakthroughs have been made.The variation of vibro-acoustic spectrum has a good corresponding relationship with identifying multi-well weathering crust interface.By making analysis and study to drilling string vibro-acoustic spectrum,we found VWD spectrum can effectively identify weathering crust formation,lithological changes are mainly reflected in spectrum′s predominant frequency,frequency distribution,frequency-distance curve and colour.
出处
《录井工程》
2014年第3期10-14,99,共5页
Mud Logging Engineering
关键词
VWD
随钻钻柱振动声波
风化壳
录井
振动声波频谱
碳酸盐岩
VWD,drill string vibro-acoustic while drilling,weathering crust,mud logging,vibro-acoustic spectrum,carbonate rock
