摘要
随钻地震技术是一种新的井中地震技术。它以钻井期间钻头产生的振动作为井下震源 ,在钻柱顶部和地面上分别记录钻头信号和地震波 ,通过互相关和钻头反褶积等数据处理方法 ,可以计算出钻头信号的传播时间、衰减与钻头信号不相干的噪声 ,得到有关井下的地层信息。该方法不需要井下仪器 ,不干扰钻井工作 ,实时获取的随钻地震资料可以用于地质导向钻井。在江汉油田范 3井 2 2 5 0 m井深处先导试验中 ,取得了较好的效果。
Seismic while drilling is a new wellbore seismic technology. It uses the vibrations produced by a drill bit while drilling as a downhole seismic energy source, and the continuous signals generated by the drill bit are recorded by a pilot sensor attached to the top of the drill string and by receivers located at selected positions around the borehole. The signals are processed by ways of crosscorrelation and deconvolution. Subsurface conditions (layer velocity, depth of reflected-interface, etc.) ahead of the drill bit can be predicted at any time during drilling without tripping out of the hole, and the seismic data are available at the well site for real-time drilling decisions.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2000年第5期10-13,共4页
Oil Drilling & Production Technology
基金
国家自然科学基金资助项目(批准号:59974021)
关键词
地震测井
地震波
信号
相关分析
数据处理
seismic logging
seismic wave
signal
correlation analysis
data process
