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1、石油大学硕士研究生学位论文(申请工学硕士学位)疏松砂岩弹性波速的实验与模型研究学科专业:油气井工程培养方向:深层岩石力学及破岩工具申请人:宋丽莉指导教师:葛洪魁(教授)入学日期:2000年9月论文完成日期:2003年4月学校代码:10425学号:Y2000053i摘要本次研究建立了疏松砂岩弹性波速测试系统,能够模拟疏松砂岩储层赋存的应力,温度,饱和流体类型等条件,利用该系统对渤海地区A油田67块岩样进行了实验测试,给出了疏松砂岩弹性波速随孔隙度,泥质含量,应力,温度和饱和流体类型的变化规律,回归出经验关系式;分析了
2、胶结对疏松砂岩弹性波速和力学特性的重要影响,在现有模型的基础上,提出了新的疏松砂岩弹性波速分析模型,该模型引入了胶结指数,考虑了胶结对弹性波速的影响.以该模型为基础对实验测试数据进行了初步的胶结校正,利用测井资料进行疏松砂岩胶结诊断,强度预测和出砂预测,并对渤海地区几个油田进行了出砂预测,得出A,B和C油田需防砂,D油田不需防砂.前三个油田防砂筛目为30目左右,生产压差1.5-4MPa,给出了生产压差预测经验关系式.关键词:疏松砂岩;弹性波速;实验测试;经验模型;出砂预测iiExperimentalAndAnaly
3、ticalModelStudyofUnconsolidatedSandstonesElasticWaveVelocitiesAbstractAtestingsystemofunconsolidatedsandstoneselasticwavevelocitieswassetup.Undertheconditionofdifferentstress,temperatureandsaturatedliquid,67unconsolidatedsandstonessamplesofoilfieldAweretesteda
4、ndtheelasticwavevelocitiesunderthereservoirconditionwereacquired.Therelationshipbetweentheelasticwavevelocitiesofunconsolidatedsandstonesandporosity,claycontent,stress,temperatureandsaturatedliquidpropertywasanalyzed,andtheexperimentalformulawereoffered.Theinf
5、luenceofcementationontheelasticwavevelocityandthemechanicalcharacteristicsofunconsolidatedsandstoneswasanalyzed.Onthebaseofexistingmodelsanalysis,anewmodeloftheelasticwavevelocityofunconsolidatedsandstoneswasdeveloped,inwhichthecementationindexwasintroducedand
6、theinfluenceofcementationontheelasticwavevelocitywasconsidered.Onthebaseofthismodel,theexperimentaldatawereemendated.Usingloggingdata,thediagnosisofcementationandthepredictionofUCSandsandingwereprocessed.TheriskofsandingoftheBohaioilfieldswasdiscussed,whichcon
7、cludedthatthesandcontrolwasneededintheoilfieldsA,BandC.Thescreenslotsizewith30to40meshesshouldbeusedandthedrawdownshouldbecontrolledbetween1.5MPato4MPaandanexperimentalformulawasalsodeveloped.Keywords:Unconsolidatedsandstones,elasticwavevelocity,test,analysism
8、odel,sandingprediction石油大学(华东)硕士学位论文iii目录中文摘要..................................................i英文摘要.................................................ii目录...........................
