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摘要: 针对RVSP勘探存在的既要获得高的地震波能量,又要保证油井套管不被炸坏的矛盾,在理论分 析的基础上,使用AUTODYN数值仿真软件,研究了油井材料对炸药能量传递的影响,得到了距离震源10m 处的质点振动速度和压力变化曲线;分析了炸药震源半径与油井套管的变形的关系;讨论了炸药震源长度与 其能量传递以及油井套管变形的关系。开展了相应的实验研究,数值仿真与实验结果吻合较好。研究结果可 以为RVSP勘探的工程应用提供参考和依据。Abstract: Toachievethatadynamitesourceshouldprovidehighseismicenergywithoutdestroyingthe oilwellinthereversedverticalseismicprofile(RVSP)prospectingofpetroleum,theoreticalanalysis wascarriedoutfortheenergytransferofthedynamitesourceandfiniteelementmodelsweredevelopedforthedynamitesourceanditssurroundingme iaintheoilwell.Numericalsimulationswere conductedbyapplyingtheAUTODYN-2Dsoftwaretoexploretheinteractionbetweentheoilwelland thedynamitesource.Thevibrationvelocityandpressurecurveswereobtainedfortheparticlelocated 10mawayfromtheseismicsourcetoinvestigatetheinfluencesofthemediaintheoilwellontheenergytransferofthedynamitesource. Effectsofthechargediametersonthedeformationoftheoil wellpipewereanalyzed.Andsomediscussionwasmadeontheeffectsofthechargelengthontheenergytransferofthedynamitesourceandthedeformationoftheoilwellpipe. Thecorrespondingexperimentwasimplementedtocomparewiththenumericalresults. Thenumericalresultsareconsistentwiththeexperimentalobservations. Theresearchcanprovidehelpfortheengineeringapplication oftheRVSPprospecting.
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Key words:
- mechanicsofexplosion /
- RVSP /
- numericalsimulation /
- dynamitesource /
- prospecting /
- explosion
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