川东南复杂构造地震资料成像研究  

Study on Seismic Data Imaging of Complex Structures in the Southeastern Sichuan Basin

作　　者：蒋晓光[1] 张光荣[1] 孔令霞[1] 何颞婷[1] 

机构地区：[1]中国石油西南油气田分公司勘探开发研究院

出　　处：《岩性油气藏》2010年第F07期86-89,共4页Lithologic Reservoirs

摘　　要：四川东部地区地形起伏剧烈、地腹构造复杂，给地震资料的处理成像造成了很大的困难。在全面分析该区地质、地震资料的基础上，提出了从野外地质到室内地震资料处理解释一体化的地震资料成像研究思路，从而针对地震地质模型、静校正、速度场建立、偏移成像等方面作了细致的研究，并将这套成像方法在西山构造地震资料处理中进行了实际应用。通过开展穿越高点的三教镇、邮亭铺及协丰剖面的实地考察和构建地震地质模型等研究工作．使该区主体构造地震老资料的成像质量有了显著的提高，为下古生界新的勘探目标的确定奠定了良好的基础。因此。该技术不仅在四川东部双复杂（地表复杂、地下复杂）地区具有较强的实用性．而且也为提高复杂构造地震资料的成像质量积累了经验。The eastern Sichuan basin is characterized by violent relief topography and complex subsurface structure, imposing difficulties to seismic data processing and imaging. In this study, on the basis of an overall analysis of the geology and seismic activity in the area, a research concept for seismic data imaging is proposed which integrates the field geological work and in-door seismic data interpretation and processing. Hence, an in-depth study has been made on seismic-geologic modeling, static correction, velocity field build-up and migration imaging. Finally, the imaging methods were applied to re-process the old seismic data of Xishan structure. By means of field survey in Sanjiaozhen, Youtingpu and Xiefeng profiles crossing the highs as well as seismic-geologic modeling, the imaging quality for reprocessing of the old seismic data in the major structure of the area is improved obviously, providing good basis for the identification of new exploration and drilling targets in the Lower Paleozoic formation. Therefore, this imaging technology is not only useful in the violent relief topography and complex subsurface structures of the eastern Sichuan basin, but also provides experience for the improvement of imaging quality of seismic data in complex structures.

关 键 词：复杂构造 地震地质模型 静校正 偏移成像 

分 类 号：P631.4[天文地球—地质矿产勘探]