LandMark软件StratWorks教程多媒体及培训材料_ch7

StratWorksChapter7:DefiningLithologyandAnalyzingSand/ShalePresenterTitleLandmarkGraphicsCorporationPartNo.625579Rev.J7-1DefiningLithologyandAnalyzingSand/shale•StratWorksmakesiteasyforyoutocalculatelithologicorfluidintervalsatwellsbasedonlogcharacteristics.•Youcanalsoquicklyanalyzethesandandshalecontentofstratigraphicunitsandmaptheresults.7-1OverviewInthischapter,youlearnto•Definestratigraphicandwellunits•setcriteriafordefininglithologicandfluidintervals•applythosecriteriatomultiplewellstogeneratecalculatedlithologicintervals•refineoroverridecalculatedlithologywherenecessary•setsandandshalebaselines•usethosebaselinestoperformanautomatedsand/shaleanalysisofstratunits•definethestratunitsneededformappingtheresultsofsand/shaleanalysis,andgeneratethemap•generatealithologycurvebasedonyourlithologycalculations•displaylithologyfilledcurves•generateandpostlithologypiecharts7-2TrainingWorkflowBuildtemplateforuseinCorrelationdisplaysCompletetheinterpretationbyinterpretingmissingpicks.Modifythestratcolumnbyinputtingunitsderivedfromexistingsurfaces.DoLithologyandSand/Shalecalculations.Rebuildstructureandisochoremapsbasedoncompletedinterpretation.7-3StratColumnEditor:Re-visitedSincestratunitsareneededtomapresultsfromsand/shaleanalysis,youwillreturntotheStratColumnEditortocreatethembeforebeginningLithologycalculations.7-4DefiningStratUnits•Astratunitistheintervalbetweentwosurfaces.Stratunitsaredefinedby•name(required—upto40characters)•parentunit(optional)•boundingsurfaces(required)•columntype(required)Boundingsurfacesarethetopandbasesurfacesthatdefinethestratunit.Youcannotcreateaunitunlessitsboundingsurfacesalreadyexistinthestratigraphiccolumn.7-5DefiningStratUnits•Columntypedetermineshowthestratunitwillbepostedinthisandotherapplications.•Thereare7typesofcolumns:Litho-Stratigraphic(thedefault)DepositionalEnvironmentChrono-StratigraphicBio-StratigraphicPetrophysicalSequence-StratUser•Allcolumnsofagiventypearedrawninasinglecomponentcolumnofthestratigraphiccolumn.Forexample,allchrono-stratigraphicunitswillbeinonecolumn,alllitho-stratigraphicunitsinanothercolumn,etc.RegardlessofwhichColumnTypeyouselect,youcansettheUnitFillTypetoeitherLithologyPattern,DepositionalEnvironment,orColorFill.7-6MethodsofIncorporatingStratUnits•Therearethreewaystoincorporatestratunitsintoyourproject’sstratigraphiccolumn:•Createanewunit.•AddaunitthatalreadyexistsintheOpenWorksdatabase.•Automaticallygenerateunitsbetweenallactivesurfaces.•Youusethefirstmethod—creatinganewunit—inthenextexercise.Theprocessofaddinganexistingunitisessentiallythesameexceptthatyoudon’thavetosupplyanewunitname.Theautomaticgenerationofunitsissummarizednext.•RemovingaStratUnitfromtheColumn,DeletingaStratUnitNamefromtheDatabase,andEditingaStratUnitisessentiallythesameprocessasremoving,deletingandeditingsurfaces.7-8GeneratingUnitsAutomatically•Ifyouwish,theprogramcanautomaticallygenerateunitsconnectingallactivesurfacesinthestratigraphiccolumn.•Notethatallunitsareofequalstatus;therearenoparentorchildunits.Unitsaregiventhenameoftheirtopsurface,andareassignedthesamecolorasthetopsurface.CreatedbyUserCreatedAutomaticallyColumnAutomaticColumn7-10Exercise:CreatingStratUnitsBeforeyoucreateanewstratunit,itstwoboundingsurfacesmustexistinthestratigraphiccolumn.Whenyoucreatethestratunit,it’saddedtoboththeOpenWorksdatabaseandthestratigraphiccolumn.7-10to7-167-18WorkingwithWellUnits•Correlationallowsyoutocreate,display,edit,anddeleteWellUnitsthatyoucanusetooverridetheprojectstratigraphiccolumnunits.WellUnitsalsoallowyoutocorrelateandmapunitsandtheirattributeswithoutmakingpicksinawell.•WellUnitboundariesaredefinedbysurfaces,faults,ordepths.•AfteryoucreateWellUnits,youcanusetheminLithology,MapView,SingleWellViewer,andSingleWellViewerEditModewheneveraunitisusedaspartofthemaportemplatedefinition.•IftheunitexistsforawellbothasaprojectstratigraphiccolumnunitandasaWellUnitdefinedinCorrelation,thentheWellUnitdefinitionoverridesthestratcolumndefinitionifyouhavechosentoincludeWellUnits.7-18AddingaNewWellUnitYoucanaddaWellUnitonlyifastratunitwiththesamenamealreadyexistsintheprojectstratigraphiccolumn.ToaddanewWellUnitinCorrelation,clickontheAddWellUnitoptionundertheInterpretationiconpopupmenuorfromtheInterpretationmenuandfillouttheAddWellUnitdialogbox.7-20AddingaNewWellUnit(continued)BoththeTopandBaseParametersfortheUnitcanbespecifiedinseveraldifferentways.7-20AddingaNewWellUnit(continued)Thefivemodesfordefiningthetopandbaseare:•ClosesttoCursor-snapstothesurfaceorfaultwithinthedefinedtolerancerange.Youcanusethedefaulttolerancerangeorenteranothervalue.•StratColumnDefinition-usesthesurfacedefinitionfortopandbasasdefinedintheStratColumn.•Surface-allowsyoutoselectfromalistofexistingsurfacesasthetoporbaseoftheWellUnit.•Fault-allowsyoutoselectfromalistofexistingfaultstodefinethetoporbaseofthewellunit.•Depth-definestheselectedtoporbasebywhereyouclickandreleasethecursorinthewell.7-23DeletingaWellUnitTheDeleteWellUnitoptionremovesanyselectedWellUnit.Thisoptionismodal–youstayinthisdeleteWellUnitmodeuntilyouentera