摘要
在塔里木盆地北部地区，地震资料常规解释提取的界面平均速度规律性差，闭合差和闭合差的均方差大，在对界面平均速度编辑平滑过程中人为因素大，导致提取的界面平均速度和时深转换的构造深度精度低。针对上述问题，提出了另一种界面平均速度提取方法，其步骤为：选择一种拟合函数对叠加速度一时间进行拟合；统计分析出拟合函数系数闭合差中的系统部分并对其进行校正，实现对叠加速度闭合差的校正；依据积分形式的ＤＩＸ公式和经过闭合差校正后的拟合函数，通过变换得到界面平均速度、界面深度与界面反射时间之间的函数关系。
In conventional interpretation of seismic data in northern area of Tarim basin, the interfacial average velocity was extracted with poor regularity, big mean square deviation between closures, andbig artificial factors during the adjustment of seismic interfacial average velocity, leading to low accuracy ofextracted interfacial average velocity and structural depth after time-to-depth conversion. For this reason,this paper presented an another method for extraction of interfacial average velocity, in which a fittingfunction was selected to match stacking velocity vs time, statistically analyze systematic part from coefficient closure of fitting function and correct it, fulfill correction of stacking velocity closure, and offer interfacial average velocity and interfacial depth as function of interfacial reflected time by transform accordingto intergral formula DIX and fitting function subjected to closure corrections.
出处
《新疆石油地质》
CAS
CSCD
2000年第1期30-31,共2页
Xinjiang Petroleum Geology
关键词
叠加速度
平均速度
层速度
油气勘探
提取
Stacking velocity, Average velocity, Interval velocity, Fitting, Function
