物探与化探
物探與化探
물탐여화탐
GEOPHYSICAL AND GEOCHEMICAL EXPLORATION
2015年
1期
104-111,117
,共9页
潘家智%许孝坤%何京国%宁鹏鹏%叶春学
潘傢智%許孝坤%何京國%寧鵬鵬%葉春學
반가지%허효곤%하경국%저붕붕%협춘학
六盘山黄土塬%盒子波%干扰波场%组合压噪
六盤山黃土塬%盒子波%榦擾波場%組閤壓譟
륙반산황토원%합자파%간우파장%조합압조
Liupan Mountain loess tableland%box wave%interference wave field%combined noise suppression
六盘山盆地被巨厚的黄土所覆盖,是表层和深层双复杂区域。巨厚的黄土和复杂的地形条件使该区干扰波非常发育,严重影响了地震资料的信噪比。为了有效调查该区干扰波发育特征,并进行针对性地压制,通过盒子波调查技术在该区的应用分析,提出了和生产结合进行盒子波调查的有效方式,克服了静校正问题对盒子波调查数据的影响。针对两种地形条件下的盒子波资料,分析了在不同地形和表层条件下干扰波场的变化,认为影响浅层和中深层信噪比的干扰波特征存在差异;并通过组合压噪效果分析,提出对不同深度勘探目标进行针对性压噪的组合接收方式,提高了六盘山地区巨厚黄土塬勘探区目标层采集资料的信噪比。
六盤山盆地被巨厚的黃土所覆蓋,是錶層和深層雙複雜區域。巨厚的黃土和複雜的地形條件使該區榦擾波非常髮育,嚴重影響瞭地震資料的信譟比。為瞭有效調查該區榦擾波髮育特徵,併進行針對性地壓製,通過盒子波調查技術在該區的應用分析,提齣瞭和生產結閤進行盒子波調查的有效方式,剋服瞭靜校正問題對盒子波調查數據的影響。針對兩種地形條件下的盒子波資料,分析瞭在不同地形和錶層條件下榦擾波場的變化,認為影響淺層和中深層信譟比的榦擾波特徵存在差異;併通過組閤壓譟效果分析,提齣對不同深度勘探目標進行針對性壓譟的組閤接收方式,提高瞭六盤山地區巨厚黃土塬勘探區目標層採集資料的信譟比。
륙반산분지피거후적황토소복개,시표층화심층쌍복잡구역。거후적황토화복잡적지형조건사해구간우파비상발육,엄중영향료지진자료적신조비。위료유효조사해구간우파발육특정,병진행침대성지압제,통과합자파조사기술재해구적응용분석,제출료화생산결합진행합자파조사적유효방식,극복료정교정문제대합자파조사수거적영향。침대량충지형조건하적합자파자료,분석료재불동지형화표층조건하간우파장적변화,인위영향천층화중심층신조비적간우파특정존재차이;병통과조합압조효과분석,제출대불동심도감탐목표진행침대성압조적조합접수방식,제고료륙반산지구거후황토원감탐구목표층채집자료적신조비。
The Liupan Mountain basin is covered with thick loess,and is hence an area with complex surface bed and deep bed. Great thickness of loess and complex landform result in extremely well?developed interference waves in this area,which seriously affect the signal?to?noise ratio of the seismic data.In order to investigate the development characteristics of the interference waves in this area and conduct effective directed suppression,the authors,through an analysis of the application of the box wave survey technology in this area, put forward an effective way of box wave survey in combination with production,which can overcome the effect of static correlation on the data of box wave survey.In the light of the box wave survey data obtained from two landform conditions,the authors analyzed the var?iations of the interference field waves under the conditions of different landforms and surface beds,and found that the characteristics of interference waves that affect the shallow beds and the middle?deep beds are somewhat different.Through the analysis of the combined noise?suppressing effects,the authors put forward the combined receiving type for conducting directed noise-suppression suitable for ex?ploration targets in different depths.The results achieved by the authors have improved the signal?to?noise ratio of the data collected from the target bed of the Liupan Mountain great thickness loess tableland area.