论文部分内容阅读
准噶尔盆地东缘巨厚砾石区具有地表和地下双重复杂的特点,表层地震地质条件复杂,吸收衰减严重,激发和接收条件差;深层地震地质条件复杂,断裂发育,构造变形强烈,致使构造主体部位地层反射波组特征不明显,基本为杂乱反射。针对以上特点,在准东地区开展了采集方法研究和大量的试验,提高了目的层的信噪比和成像效果,为该区下一步地震勘探提供了技术借鉴与支持:①精细的近地表结构调查获得全方位的浅层地震属性信息;②井震联合激发技术,针对不同的地表科学选择激发因素,确保有效波激发能量、提高资料信噪比;③设计大组合接收方式,压制了噪音,提高了信噪比。
Jurassic gravel area on the eastern margin of Junggar Basin has the characteristics of complex surface and subsurface complex. The surface geological conditions are complex, the absorption attenuation is serious, and the excitation and reception conditions are poor. The deep seismic geological conditions are complex, the faults develop and the tectonic deformation is strong, Stratigraphic reflection wave group characteristics are not obvious, the basic messy reflection. In view of the above characteristics, research on acquisition methods and a large number of experiments in the quasi-eastern region have been carried out to improve the signal-to-noise ratio and imaging effect of the target layer and provide technical reference and support for the next seismic exploration in the area. ① Fine sub-surface structure The survey to obtain a full range of shallow seismic attribute information; ② joint seismic stimulation technology, for different surface science to choose the excitation factor to ensure that the effective wave excitation energy and improve data signal to noise ratio; ③ design a large combination of receiving methods, suppress the noise, Improve the signal to noise ratio.