鄂尔多斯盆地巨厚黄土塬区非纵测线地震资料处理方法研究

Study on processing method for the broadside seismic data of hugethick loess area in Erdos Basin

(东方地球物理公司研究院长庆分院,陕西西安 710021)

BGP Changqing Branch,Xi’an 710021,China

鄂尔多斯盆地巨厚黄土塬区,地表条件复杂,直测线资料的品质较差,而沿沟布置的弯线,测网稀疏,地震勘探的精度受到很大制约。在鄂尔多斯盆地JY地区开展了非纵测线地震资料处理方法研究。对非纵测线资料的特点进行了分析,在此基础上,提出了非纵地震资料处理流程。主要技术包括：①具有黄土塬特色的静校正技术；②合理的噪声压制技术；③拓宽频带的组合反褶积技术；④高精度非纵速度分析技术。经过非纵地震资料处理流程处理的地震剖面,品质得到了较大的提高,可以满足该地区油气勘探的需要。

The huge-thick loess area in Erdos Basin has complex surface conditions,so the quality of straight-line survey is relatively bad,and the survey grid of crooked-lines along ravines is sparse,the precision of seismic exploration is limited.Therefore,we studied the processing methods for broadside seismic data.Based on analyzing the characteristics of broadside seismic data,we proposed processing workflow for broadside seismic data.The main methods of the workflow include static correction technology for loess area,reasonable noise suppressing technology,combination deconvolution technology for enhancing band width,as well as high-precision broadside velocity analysis technology for out-of-line seismic data.The seismic data after processed by the above workflow had great improve in quality,which can meet the need of hydrocarbon exploration at the area.