多分量地震勘探技术在准噶尔盆地西北缘的应用

摘要

Using P- and S-wave data and well logs in Chepaizi area of Junggar basin,combined with the properties and characters of P-wave and converted wave,the observation system using converted wave for exploration is designed,and the high-quality multi-component seismic exploration data are obtained by negative offsets inversion of horizontal component,converted wave noise removal,static correction,CCP gathers stack,velocity analysis and time migration,etc.The interpretation results coincident with the drilling results are gained by P- and S-wave calibration and simultaneous inversion,synthetic seismographic record making,converted waveform identification,horizon correlation,attribute profile computing and seismic petrophysical property analysis,etc.%利用准噶尔盆地西北缘车排子地区纵、横波资料、测井资料,根据纵波、转换波传播的性质和特点,进行有针对性的转换波勘探观测系统设计,得到较高质量的多分量地震勘探数据;通过对转换波资料进行水平分量负炮检距反转,转换波去噪、静校正、共转换点道集抽取、速度分析、时间偏移等处理,得到信噪比较高、反射信息丰富、波组特征明显的多分量处理数据;通过纵横波标定、合成地震记录制作、转换波波型识别与层位对比、转换波剖面压缩与速度比求取、属性剖面计算、地震岩石物理分析、纵横波联合反演的解释思路,获得了与钻探结果相吻合的解释成果。