东濮凹陷含盐地层合成地震记录制作方法研究

地震资料的解释和精细储层预测要求对地质层位以及砂体进行准确的标定。利用单井测井资料制作优质的合成地震记录是进行地震地质层位标定的基本途径。在利用单井资料人工制作合成地震记录时主要应用声波时差（速度）和密度资料，在我国东部地区一些老井因缺少密度资料，需要利用Gardner经验公式由速度数据转换密度。在含盐地层中，仅靠速度及其转换的密度制作的合成记录无法与实际地震剖面很好地对比。在充分研究含盐地层不同岩性地球物理参数的基础上，针对东濮凹陷盐岩层，采取密度替代法进行合成地震记录的制作，在实际应用中取得了较好的效果。

Synthetic seismogram construction in saliniferous strata in Dongpu depression

Seismic interpretation and reservoir prediction need a vera- cious calibration to horizon and sand-body.The common meth- od of seismic geologic horizon calibration is to construct syn- thetic seismogram using interval transit time and density from logs.Density is usually calculated from velocity using Gardner formula in case density data are not available,such as in some oilfields in eastern China.The seismogram constructed from calculated density,however,cannot be matched well with seis- mic traces in saliniferous strata.Based on an investigation of petrophysical properties in saliniferous strata,we proposed to construct seismogram with density substitution in Dongpu de- pression.Desire results have been achieved.