摘要
在沙漠、山地和黄土塬等复杂地表地区的地震勘探中,由于地表起伏大、低速带厚度大且横向速度变化剧烈,基准面静校正计算不准确,因而对地震资料处理中的剩余静校正提出了更高的要求。为此,对共地面点法、Satan算法和最大能量法等3种剩余静校正方法的原理和适用性进行了研究。从模型道构建方法和构造项影响的角度详细分析了3种剩余静校正方法的适用性,指出在能消除构造项影响的情况下,共地面点法和Satan算法可以生成质量更高的模型道和计算大剩余静校正量,处理效果更好;但在构造项影响无法消除的情况下,由于最大能量法不受构造项影响,因而更加适用。实际资料的测试结果验证了3种剩余静校正方法的特点。
At the area with complex surface conditions,such as desert,mountainous area and loess plateau,the datum static correction is inaccurate as a result of the large topographic variations,the thick low-velocity layer and its rapid variation of velocity in the horizontal direction,which has strict requirements on the residual static correction during seismic data processing.Therefore,the principle and applicability of three residual static correction methods were studied,including common surface location method,Satan algorithm and maximum stack-power method.From the aspect of the establishment of model traces and the impact of structures items,the applicability of the three methods was analyzed in detail.The result points out that the common surface location method and Satan algorithm are better than Maximum stack-power method without the impact of structural items,because the former two methods can improve the model traces and estimate the large residual static moveouts with better processing results.On the contrary,if the impact of structural items cannot be eliminated,the effect of Maximum stack-power method is better.The characteristics of the three residual static correction methods were verified by the results.
出处
《石油物探》
EI
CSCD
北大核心
2012年第2期172-177,105,共6页
Geophysical Prospecting For Petroleum
关键词
剩余静校正
地表一致性
共地面点法
Satan算法
最大能量法
构造项
residual static correction
surface consistent
common surface location method
Satan algorithm
maximum stack-power method
structural item
