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1、2014年8月大慶石油地質(zhì)與開發(fā)Aug.,2014第33卷第4期PetroleumGeologyandOilfieldDevelopmentinDaqingVo1.33No.4DOI:10.3969/J.ISSN.1000—3754.2014.04.028松遼一虎林盆地深反射地震資料處理陳志德林文郎鈞(1.大慶油田有限責(zé)任公司勘探開發(fā)研究院,黑龍江大慶163712;2.大慶鉆探工程公司鉆井生產(chǎn)技術(shù)服務(wù)一公司,黑龍江大慶163358)摘要:為了提高松遼一虎林盆地深反射地震資料處理品質(zhì),基于CMP點(diǎn)分布重心的彎線定義解決了因單炮排列長度大、彎線引起的共中心點(diǎn)分
2、布不規(guī)則的難題;通過空變中間基準(zhǔn)面靜校正解決了盆地與山地相間、地表起伏大,復(fù)雜地表?xiàng)l件下的靜校正問題;利用疊前地震道插值技術(shù)提高了數(shù)據(jù)空間采用密度,可以在不損傷反射信號的前提下有效壓制折射波的干擾。處理實(shí)踐證明,成果剖面信噪比高,深部地質(zhì)結(jié)構(gòu)清晰,能夠?yàn)閰^(qū)域深部的構(gòu)造研究和巖石圈探測提供高品質(zhì)的地震資料。關(guān)鍵詞:深反射地震;彎線處理;CMP重心;空變中間基準(zhǔn)面;疊前插值;莫霍面中圖分類號:P631文獻(xiàn)標(biāo)識碼:A文章編號:1000—3754(2014)04·0136-04PRoCESSoFTHEDEEPSEISMICREFLECTIoNDATAFoRSoNG
3、LIAo.HULINBASINSCHENZhide,LINWen,LANGJun(1.Exploration&DevelopmentResearchInstituteofDaqingOilfieldCompanyLtd.,Daqing163712,China;2.Ⅳ0.1DrillingTechniqueServiceCompanyofDaqingDrilling&ExplorationEngineeringCorporation,Daqing163358,China)Abstract:ThedeepseismicreflectiondatainSongl
4、iao—HulinBasinsarecharacterizedbyhighlycrookedline,greatvariationofsurfaceelevation,andabnormallydevelopedshallowrefractionwavesforthemountainindividualshotrecord.Inordertoimprovethedataprocessedprecision,onthebasisofthecrookedlinedefinitionofCMPcentroid,theproblemsofthelongoffset
5、forthesingleshot,irregularCMPdistributioncausedbythelinesaresolved;bymeansofthestaticcorrectionofthespace—variantmiddledatumlevel,thecorectionissuresbetweenthebasinandmountains,greatchangeofthesurfaceelevationandcomplicatednear-surfaceconditionsaredealtwith;withthehelpofpre—stackt
6、raceinterpolationtechnique,thespatialdensityoftheseismicdataacquisitionisin—creased,thustheinterferenceoftherefractionwavescanbeeffectivelyattenuatedunderthepre-conditionofnoin—juretothereflectedsignals.TheprocessshowsthattheS/N(signal/noise)ratiosoftheresultprofilesareprettyhighe
7、r,thedeepgeologicalstructuresaremuchclearer,thereforethehigh—qualityseismicdataareprovidedforthestructuralresearchesandlithospheredetectiononthedeepregionalgeology.Keywords:deepseismicreflection;crookedlineprocessing;CMPcentroid/barycenter/centerofgravity;space一收稿日期:2014—02-22改回日期
8、:2014—05—06基金項(xiàng)目:國家重大基礎(chǔ)研究計劃(973)項(xiàng)目