ASTM D4630-1996(2002) 用恒定水头喷射试验现场测定低渗透性岩石的透过比和释水系数的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingTransmissivityandStorageCoefficientofLow-PermeabilityRocksbyInSituMeasurementsUsingtheConstantHeadInjectionTest
【原文标准名称】:用恒定水头喷射试验现场测定低渗透性岩石的透过比和释水系数的标准试验方法
【标准号】:ASTMD4630-1996(2002)
【标准状态】:现行
【国别】:
【发布日期】:1996
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D18.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:钻孔钻探;常压头试验;非连续岩石;渗透率.土壤/岩石;压力试验.岩石;粘度.岩石;断层带;现场试验.岩石;流量和流率.土壤/岩石;岩石;饱和;水饱和;水
【英文主题词】:borehole;constantheadtesting;flow;insitu;faultzones;fieldtesting;flowandflowrate;permeability;pressuretesting;rock;saturation;storativity;transmissivity;viscosity;water;watersaturation;
【摘要】:TestMethod8212;Theconstantpressureinjectiontestmethodisusedtodeterminethetransmissivityandstorativityoflow-permeabilityformationssurroundingpacked-offintervals.Advantagesofthemethodare:(a)itavoidstheeffectofwell-borestorage,(b)itmaybeemployedoverawiderangeofrockmasspermeabilities,and(c)itisconsiderablyshorterindurationthantheconventionalpumpandslugtestsusedinmorepermeablerocks.Analysis8212;Thetransientwaterflowratedataobtainedusingthesuggestedtestmethodareevaluatedbythecurve-matchingtechniquedescribedbyJacobandLohman(1)2andextendedtoanalysisofsinglefracturesbyDoeetal.(2).Ifthewaterflowrateattainssteadystate,itmaybeusedtocalculatethetransmissivityofthetestinterval(3).Units:4.3.1Conversions8212;Thepermeabilityofaformationisoftenexpressedintermsoftheunitdarcy.Aporousmediumhasapermeabilityof1darcywhenafluidofviscosity1cp(1mPax00B7;s)flowsthroughitatarateof1cm3/s(10x2212;6m3/s)/1cm2(10x2212;4m2)cross-sectionalareaatapressuredifferentialof1atm(101.4kPa)/1cm(10mm)oflength.Onedarcycorrespondsto0.987x03BC;m2.Forwaterastheflowingfluidat20x00B0;C,ahydraulicconductivityof9.66x03BC;m/scorrespondstoapermeabilityof1darcy.1.1Thistestmethodcoversafieldprocedurefordeterminingthetransmissivityandstorativityofgeologicalformationshavingpermeabilitieslowerthan103956;m2(1millidarcy)usingconstantheadinjection.1.2Thetransmissivityandstorativityvaluesdeterminedbythistestmethodprovideagoodapproximationofthecapacityofthezoneofinteresttotransmitwater,ifthetestintervalsarerepresentativeoftheentirezoneandthesurroundingrockisfullywater-saturated.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:07_060
【页数】:6P.;A4
【正文语种】: