物探与化探
物探與化探
물탐여화탐
GEOPHYSICAL AND GEOCHEMICAL EXPLORATION
2014年
3期
577-581
,共5页
粘滞声波方程%能量衰减%吸收补偿%波场延拓
粘滯聲波方程%能量衰減%吸收補償%波場延拓
점체성파방정%능량쇠감%흡수보상%파장연탁
viscosity acoustic wave equation%energy attenuation%absorption and compensation%wave field continuation
通常地层介质都是粘滞性的,由于地层的吸收作用,地震波在向下传播过程中能量被衰减,特别是高频能量的衰减,使反射信号频带宽度变窄。为了补偿被吸收的能量,笔者采用粘滞声波方程波场延拓方法进行能量吸收和衰减补偿。首先,从粘滞性波动方程波场延拓函数理论出发,推导了波场延拓函数稳定性条件;其次,对其有效性进行了测试和分析;最后,通过设计数值模型进行正演模拟对比试验,证明了基于粘滞性声波方程的吸收补偿方法能够很好地对粘性介质吸收衰减进行能量补偿,改善处理效果。
通常地層介質都是粘滯性的,由于地層的吸收作用,地震波在嚮下傳播過程中能量被衰減,特彆是高頻能量的衰減,使反射信號頻帶寬度變窄。為瞭補償被吸收的能量,筆者採用粘滯聲波方程波場延拓方法進行能量吸收和衰減補償。首先,從粘滯性波動方程波場延拓函數理論齣髮,推導瞭波場延拓函數穩定性條件;其次,對其有效性進行瞭測試和分析;最後,通過設計數值模型進行正縯模擬對比試驗,證明瞭基于粘滯性聲波方程的吸收補償方法能夠很好地對粘性介質吸收衰減進行能量補償,改善處理效果。
통상지층개질도시점체성적,유우지층적흡수작용,지진파재향하전파과정중능량피쇠감,특별시고빈능량적쇠감,사반사신호빈대관도변착。위료보상피흡수적능량,필자채용점체성파방정파장연탁방법진행능량흡수화쇠감보상。수선,종점체성파동방정파장연탁함수이론출발,추도료파장연탁함수은정성조건;기차,대기유효성진행료측시화분석;최후,통과설계수치모형진행정연모의대비시험,증명료기우점체성성파방정적흡수보상방법능구흔호지대점성개질흡수쇠감진행능량보상,개선처리효과。
Generally, the layer medium are viscous .Due to absorption affect, seismic wave energy ,especially high-frequency energy be absorbed and attenuated in downward propagation, reflection wave signal frequency bands be narrowed. For compensated those ab-sorbed energy , the paper , adopt viscosity wave equation wave field continuation method, used to carry out energy compensation re-searching, and obtained better effect . At first , the paper from viscosity wave equation wave field continuation function theory , derived wave field continuation function stability condition ;Secondly,author test the method availability;Finally , through forward simulation test , proved absorption and compensation method based on viscosity wave equation can carry on very well compensation of energy at-tenuation, improved processing effect.