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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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自适应时窗相干体计算技术及其应用
Keywords: 相干体,自适应时窗,波形,倾角,方位角
Abstract:
？相干体技术是预测断层形态、河道砂体分布及碳酸盐岩裂缝发育状况等的重要技术之-。但在计算相干体时以计算点为中心选取固定长度时窗很难兼顾浅层和深层,即在分析浅层时出现跨多个同相轴,在分析深层(低频带)时因时窗长度不够,在同相轴零点附近相干值易受随机噪声影响;另外,即使时窗大小合适,但在波组起跳点和终止点附近易受邻近波组影响,也难以准确求取同相轴倾角、方位角和相干值等属性;此外,相干体还有较多沿层特征。本文通过地震数据波形自适应地确定时窗,由该时窗计算相干值作为时窗内各样点的相干值;在此基础上,通过计算各视倾角对的相干值估算波形的倾角和方位角。实际资料的处理效果表明,应用本文方法求取的相干体、倾角和方位角属性较为可靠。
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| [2] | bahorichmsandfarmersl.3-dseismicdisconti-nuityforfaultsandstratigraphicfeatures;thecoher-encecube.theleadingedge，199，14(10):1053-1058
|
| [3] | marfurtkj，kirlinri.，farmershetal.3dseismicattributesusingarunningwindowsemblance-basedalgorithm.geophysics，1998，63(4):1150-1165
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| [4] | ucrsztcnkornaandmarfurtkj.eigcnstructurc-basedcoherencecomputationsasanaidto3-dstruc-turalandstratigraphiemapping.geophysics,1999，61(5):1468-1479
|
| [5] | liyd,luwk，xiaohqctal.dip-scanningcohcr-cnccalgorithmusingcigcnstructurcanalysisandsu-pertracetechnique.geophysics，2006，71(3):v61-v66
|
| [6] | marfurtkj.robustestimatesof3dreflectordipandazimuth.geophysics,2006，71(4);p29-p40
|
| [7] | luoy，wangye,aibinhassannmctal.compu-tationofdipsandazimuthswithweightedstructuraltensorapproach.geophysics,2006，71(5):p29-p40
|
| [8] | doniasm，davidc，bcrthoumicuyctal.ncwfaultattributebasedonrobustdirectionalscheme.geo-physzis,2007，72(4):p39-p46
|
| [9] | 安勇.利用地震波组特征的精细相干扫描方法.石油地球物理勘探，2009,44(4);406-408anyong.finecoherentscanningmethodbyseismicwavegroupfeature.ogp,2009,44(4):406-408
|
| [10] | marfurtkj，sudhakarv，ucrsztcnkornactal.co-herencycalculationsinthepresenceofstructuraldip.geophysics，1999，64(1):104-111
|
| [11] | marfurtkjandkirlinrl.3dbroadbandestimatesofreflectordipandamplitude[j].geophysics.2000,65(1):304-320
|
| [12] | cohcnlandcoifmanrr.localdiscontinuitymcas-uresfor3-dseismicdata[j].geophysics.2002,67(6):1933-1945
|
| [13] | luwk，liyd,zhangswetal.higher-order-sta-tisticsandsupertrace-basedcoherence-estimational-gorithm.geophysics,2005，70(3):p13-p18
|
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