ASTM D4631-1995(2008) 用压力脉冲技术现场测量低渗透性岩石的透射率和释水系数的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingTransmissivityandStorativityofLowPermeabilityRocksbyInSituMeasurementsUsingPressurePulseTechnique
【原文标准名称】:用压力脉冲技术现场测量低渗透性岩石的透射率和释水系数的标准试验方法
【标准号】:ASTMD4631-1995(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:boreholedrilling;discontinuities;faultzones;fieldtestingflowandflowrate;groundwater;permeability;pressuretesting;pulsetesting;rock;saturation;storativity;transmissivity;viscosity;water;watersaturation;Boreholedrilling;Discontin
【摘要】:TestMethod8212;Thepulsetestmethodisusedtodeterminethetransmissivityandstorativityoflow-permeabilityformationssurroundingthepacked-offintervals.Thistestmethodisconsiderablyshorterindurationthanthepumpandslugtestsusedinmorepermeablerocks.Toobtainresultstothedesiredaccuracy,pumpandslugtestsinlow-permeabilityformationsaretootimeconsuming,asindicatedinFig.1(fromBredehoeftandPapadopulos(1)).Analysis8212;Thetransientpressuredataobtainedusingthesuggestedmethodareevaluatedbythecurve-matchingtechniquedescribedbyBredehoeftandPapadopulos(1),orbyananalyticaltechniqueproposedbyWangetal(2).Thelatterisparticularlyusefulforinterpretingpulsetestswhenonlytheearly-timetransientpressuredecaydataareavailable.Units:Conversions8212;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.ViscosityofWater8212;Table1showstheviscosityofwaterasafunctionoftemperature.TABLE1ViscosityofWaterasaFunctionofTemperatureTemperature,x00B0;CAbsoluteViscosity,mPax00B7;s0
1.79
2
1.67
4
1.57
6
1.47
8
1.39
10
1.31
12
1.24
14
1.17
16
1.11
18
1.06
20
1.00
22
0.96
24
0.91
26
0.87
28
0.84
30
0.80
......