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在塔里木盆地塔克拉玛干沙漠地区,巨厚沙丘带来激发、接收及静校正问题,导致地震资料的信噪比非常低,构造特征很难查清,无法为油气开发提供可靠资料。本文提出以间距2-3km微测井控制点调查数据为基础,结合生产单炮反演联合修正沙丘曲线与表层结构的表层建模方法。在相对少量微测井点的情况下获得了该区较合理的表层结构模型,确保了油气藏主体部位巨厚风成沙丘区的静校正精度。这种巨厚风成沙丘区的表层建模方法明显提高了地震资料的品质。
In the Taklimakan Desert of the Tarim Basin, the problem of excitation, reception and static correction is caused by very thick sand dunes. As a result, the signal-to-noise ratio of seismic data is very low. Therefore, the tectonic characteristics are difficult to be identified and reliable information can not be provided for the development of oil and gas. In this paper, based on the survey data of 2-3km micro-well control points at intervals, the authors combined with the single-gun inversion to jointly modify the surface modeling method of dune curve and surface structure. In the case of a relatively small number of micro-logging points, a more reasonable model of the surface structure is obtained, which ensures the accuracy of the static correction of the mega-thick aeolian dune area at the main part of the reservoir. The method of surface modeling of such a thick aeolian dune area significantly improves the seismic data quality.