promax处理流程-许辉群.ppt

(2)应用预计算结果 速度扫描 6、一次叠加、拾取层位、计算剩余静校正量 Disk Data Input Normal Moveout Correction Automatic Gain Control CDP/Ensemble Stack Disk Data Output Disk Data Input Bandpass Filter Auotomatic Gain Control Stack Display 2D/3D Max Power Autostatic* 7、二次速度分析 Disk Data Input Apply Residual Statics Bandpass Filter Automatic Gain Control Disk Data Output CVS Strip Analysis* 7、二次速度分析 Disk Data Input Apply Residual Statics Bandpass Filter Automatic Gain Control Disk Data Output CVS Strip Analysis* * 非弹性吸收(inelastic attenuation)—由于岩石是非完全弹性体，地震波在传播过程中一部分能量将转化为热能而消耗掉，从而使波的能量变弱的现象，称为地层的吸收衰减作用。 真振幅恢复(True Amplitude Recovery)—就是从地面检波器记录的原始振幅中，消除波前扩散和地层吸收衰减的影响，使其恢复到仅与地下反射界面的反射系数有关的真振幅值，使恢复后的地震波振幅正比于反射系数的大小。这种保持反射波振幅与反射系数呈正比的剖面称为相对振幅保持剖面。 (4)反褶积参数测试 Disk Data Input Trace kill/reverse Trace muting True Amplitude Recovery dB/sec correction constant …………….9 Reproduce Traces Trace grouping to reproduce……………….Ensembles Total Number of datasets……………………3 IF Trace selection MODE ……………………….Include Select primary trace header word…………REPEAT Select secondary trace header word……...NONE Specify trace list………………………………1 Trace Display Label Trace label………………………………………Original Input ELSEIF Trace select MODE…………………………….Include Select Primary trrace header word………....REPEAT Selectr secondary trace header word………NONE Specify trace list………………………………..2 Spiking/Predictive Decon① Trace Display Label ELSE Spiking/Predictive Decon② Trace Display Label ENDIF Trace Display ①处参数说明： Type of deconvolution…………………………Minimum phase spiking Decon operator length(ms)…………………..160 Operator ‘ white noise’ level………………….0.1 Window rejection factor………………………2 Time gate reference……………………………..time Get decon gates from the DATABASE?..........yes Select decon gate parameter file………………decon gate Output traces or filers……………………………Normal decon output Apply a bandpass filter after decon?..