高密度采集技术在西部煤炭资源勘探中的应用

结合中国煤炭地质总局承担的国家重大产业技术开发专项“西部煤炭资源高精度三维地震勘探技术”依托工程的研究成果，介绍了高密度三维地震勘探的概念、技术特点和优势。高密度三维地震采集技术与常规三维地震技术相比，具有高覆盖次数、小空间采样间隔、宽（全）方位角、均匀炮检距道集等特点，在资料采集和处理过程中容易接收并保护宽频数据，实现高信噪比、高分辨率、高保真度。实例说明小网格和高覆盖次数可有效提高地震资料信噪比和地震反射波的连续性，提高小构造的检测能力。根据多个依托工程的实施情况，提出了高密度三维地震采集技术对设备及野外采集的要求。

High Density Acquisition Technology and Its Application in Western China Coal Resource Exploration

Combined with the CNACG undertaking state major industrial technological development special project ＂Western China Coal Resource High Precision 3D Seismic Prospecting Technology＂ backing engineering research results, introduced conception, technical characteristics and predominance of the high density 3D seismic prospecting. Compared with conventional 3D seismic technology, the high density 3D seismic acquisition technology has characteristics of more folds, smaller spatial sampling interval, wide （complete） azimuth and even offset and trace gather, easy to receive and protect wide-band data during data processing, can actualize high S/N ratio, high resolution and high fidelity. Examples demonstrated that small grid and more folds can improve seismic data S/N ratio and seismic reflection wave continuity effectively, raise detecting ability for minor structures. According to multiple backing engineering operation practices, put forward high density 3D seismic acquisition technology requirements for facility and field acquisition.