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1、八扇区水泥胶结测井SBT一、SBT测井原理一、SBTWELLLOGGINGPRINCIPLE根据几何声学的原理:套管中的声波由发射器发出,经过泥浆传播到套管壁,再经过套管壁传播到第一界面,而后传播到第二界面。传播路径大致是:套管波、水泥环波、地层波、泥浆波。最早到达接收器的套管波(滑行波),其次是地层波,最后泥浆波(直达波)。Accordingtotheprincipleofgeometricalacoustics:acoustictubebyatransmitter,throughthemudtothecasingwall,andthenaf
2、terthecasingwallspreadtothefirstinterface,andthenspreadtothesecondinterface.Thepropagationpathisroughly:casingwave,cementringwave,theformationwave,mudwave.Thecasingwavewasthefirsttoreachthereceiver(slidewave),followedbytheformationwave,finallymudwave(directwave).SBT下井仪器技术指标T
3、hetechnicalindicatorsofSBTdownholeinstrument仪器外径:70mm仪器长度:2.9m仪器重量:68KG最高耐温:150℃最高耐压:80MPaOD:70mmlength:2.9mweight:68KGThemaxtemperature:150℃Themaxvoltage:80MPaSBT主要作用SBTthemainrole精确评价水泥返高位置评价第一界面水泥胶结情况评价第二界面水泥胶结情况能准确评价第一界面存在的槽道、孔洞的位置、大小及分布情况Accurateevaluationofthecementret
4、urnheightpositionEvaluationofthefirstinterfacecementbondEvaluationofthesecondinterfacecementbondAccurateevaluationoftrenchandcavernofposition,sizeanddistributioninthefirstinterface测量范围MeasuringRange适用于新井固井质量评价适用于老井固井质量复查评价适用于4-7英寸套管井质量测井Suitableforthenewwellcementingqualitye
5、valuationSuitablefortheoldwellcementingqualityreviewevaluationApplicableto4-7inchcasingwelllogging测量时间Measurementoftime固井48小时后进行测井48hoursaftercementingloggingSBT测井资料解释方法SBTloggingdatainterpretationmethod根据八扇区胶结成像图、声幅、变密度曲线显示综合分析。根据声幅曲线的幅度值,结合变密度显示采用相对幅度法评价第一、二交界面的固井质量。再结合八扇区
6、胶结成像图,在管外有水泥胶结呈黑色,反之呈白色。Accordingtotheeightsectorconsolidatedimaging,CBL,VDLshowsmakeacomprehensiveanalysis.AccordingtotheCBLofamplitudevalues,usingtherelativeamplitudemethodevaluatescementingqualityofthefirstandthesecondinterfacewiththeVDLshows.Combiningwiththeeightsectorco
7、nsolidatedimaging,outsideofthepipewithcementisblack,otherwiseiswhite.精确评价水泥返高位置。Accurateevaluationofthecementreturnheightposition.在CBL显示第一界面水泥胶结良好的位置,SBT胶结图呈灰色或白色,显示第一界面胶结中等或差。TheCBLdisplaysthefirstinterfacecementinggoodlocation,SBTbondgraphgrayorwhite,displayingafirstinterf
8、acecementingmediumorpoor.CBL显示第一界面水泥胶结良好SBT胶结图呈白色表示第一界面交接不好。CBLdisplaysthef