Model-based static correction method in complicated terrain areas
Li Wei-zhong1,2, Saleh AAl-Maghlouth2, Adnan Hashem2, Tang Wen-bang3, Wang Da-yuan3
1. School of Ocean and Earth Sciences,Tongji University,Shanghai City,200092,China;
2. Sino-Saudi Gas Company Ltd.,International Petroleum Exploration&Development Company Ltd.of Sinopec,Al Khubar,31952,Saudi Arabia;
3. Beijing Science&Technology Development Company Ltd.,Beijing City,120018,China
Abstract:Based on the brief introduction to the commonly used methods and the characteristics of the methods in the static correction processing,and by combining the features of the study area,the model-based static correction processing method was presented in this paper.The sand dune top surface(model top surface)was redefined based on the characteristics of the near-surface layer,a relatively accurate near-surface model was constructed by integrating with the dune compaction curve,with respect to the uneven distribution of the micro-seismic surveys and non-stable refractors,the relative refraction static correction method was introduced in this paper,as a result the accurate modifications for the model in complicated near-surface region was realized,and the reliability of the datum correction was assured,it also laid a good foundation for the subsequent surface consistent residual static correction.The application of the field data processing show that the model-based static correction method could greatly fit the static correction processing in the complicated terrain conditions,it could raise the imaging precision of the low-amplitude structures.