复杂地质条件合成地震记录的分类标定方法——以孤南209井区为例
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摘要
高精度合成地震记录标定是精细储层描述的基础。在地质条件复杂的地区,由于地震资料也复杂,常规的合成记录标定技术往往不能达到准确标定的目的。以孤南209井区为例,探讨了复杂地质条件下分类型合成地震记录标定技术。实践表明,对于复杂地质区块,合成记录的标定须做好以下工作:①地震反射特征分析;②提取符合研究区地质特征的子波(空变);③按不同地震反射特征的类型分别进行单井标定;④根据研究区地质规律进行横向多井联合标定(调整)。
The calibration of high-precision synthetic seismogram is foundations of refined reservoir description.For an area with complex geological conditions,the conventional methods are not usually able to calibrate synthetic seismogram accurately because this seismogram is also complex.As a case study,a grouped method to calibrate synthetic seismogram with complex geology has been approached in Gunan-209 area.The results indicate that the following procedure has to be implemented well for synthetic seismogram calibration in an area with complex geology:(1) to analyze seismic reflection signature;(2) to extract space-variant wavelet consistent with the study area geology;(3) to mark single-well calibration by different groups of seismic reflection signature;(4) to make lateral multi-well calibration according to the study area geology.
引文
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