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时间:2020-03-25
《基于模拟油井的井下测试仪温度修正校准方法.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第27卷第9期传感技术学报V01.27No.92014年9月CHINESEJOURNALOFSENSORSANDACTUATORSSept.2014TemperatureCorrectionCalibrationMethodforDownholeTesterBasedonSimulativeOilWellXIAOWencong,MATiehua’,CUIChunsheng,WENXingxi,(1.NationalKeyLaboratoryofElectronicMeasurementTechnology,NorthUniversityo
2、fChina,Taiyuan030051,China;2.EducationMin~tryKeyLaboratoryofInstrumentationScienceandDynamicMeasurement,NorthUniveni~ofChina,Taiyuan030051,China)Abstract:Intheoilwellperforationpressuretesting,alotofheatwillbereleasedduringtheprocessofperforation.Thetemperatureeffectofpie
3、zoresistivepressuresensorisamainfactorinfluencingthetestingprecision.Toaccuratelymeasurethedownholepressure,wehadsetupcalibrationsystemwithexistingwellssimulationtestdevice.Thesimu—lationtestdeviceisusedtosimulatedownholehightemperatureandhighpressureenvironment.Severalca
4、librationtestsweredoneundermultipletemperatureenvironments.Thetestresultswerecontrastedwiththestandardtestsys—tem.Thestandardtestsystemwastracecalibrated.Thepiezoresistivesensorsensitivityunderdifferenttemperatureconditionswasdrawoutbytheleastsquaremethod.Atlast,thepressu
5、redatawasmodifiedaccordingtothereal—timetemperaturedatawhichiscollectedbytester.CalculationshowsthatthepeakpressureCHIVeis1.4MPasmalleraftermodification.Thisaccountfor2.08%ofthepeakpressure.Anditshowsthattheimpactofpiezoresistivesensortem—peratureeffectshouldnotbeneglecte
6、d.Thetemperaturecorrectioncalibrationmethodfordownholetesterbasedonsimulativeoilwellcaneffectivelyeliminatetheeffectoftemperature,improvethetestaccuracy.Keywords:dynamiccalibrationsystem;sensitivity;temperaturecorection;oilwelltesting;pressuresensorEEACC:7230doi:10.3969/j
7、.issn.1004-1699.2014.09.024基于模拟油井的井下测试仪温度修正校准方法术肖文聪,马铁华’,崔春生,温星曦(1.中北大学电子测试技术国家重点实验室,太原030051;2.中北大学仪器科学与动态测试教育部重点实验室,太原030051)摘要:针对石油井下射孔压力测试中,在射孔完井过程中会释放大量的热量,压阻式压力传感器的温度效应成为影响测试精度的主要因素。为准确测取井下压力,用现有模拟油井试验装置模拟井内高温高压环境建立了校准系统。在多个温度环境下进行校准试验,通过与溯源性校准的标准测试系统的对比计算,利用最小二乘法得出
8、压阻传感器在不同温度条件下的灵敏度,根据测试仪采集的实时温度数据值修正了压力数据,计算表明压力曲线峰值比修正前小1.4MPa,为压力峰值的2.08%,表明该压阻传感器温度效应产生的影响不可忽略
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