摘要
文中研究了随钻地震 (Seismic While Drilling,简称 SWD)数据与垂直地震剖面 (VSP)数据的关系 ,给出了适用于 SWD的波动理论模型。利用直达波和反射波的褶积关系 ,得到了一种可用于钻头前方预测的波阻抗反演方法 ,它适用于任意相位子波并具有抗多次波能力。理论模型与实际资料试算表明 ,本文给出的反演方法具有很高的实用价值 ,适用于 SWD数据 ,能够较好地预测钻头前方目的层的位置以及危险超高压层的深度和压力 ,从而提高钻井的目的性、安全性及准确性。
Studying the relation between seismic while drilling (SWD) and vertical seismic profile (VSP),the paper gave wave theory's model suitable for SWD.Using the convolution relation between directed wave and reflected wave,the inversion method of wave impedance,that is suitable for wavelet with any phase has an anti-multiple capability and can be used for prediction of ahead of bit,can be achieved.The examples of theoretic model and real data show that the inversion presented by the paper has a good practical value,is suitable for SWD data and can better predict the target position of ahead of bit,the depth of dangerous stratum under superpressure and its pressure,so that can improve purposefulness,security and accuracy of drilling.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2003年第1期38-43,共6页
Oil Geophysical Prospecting
基金
国家"8 63"项目"高温超压地层钻井技术"基金资助。
