SonicScope The Next Generation of Sonic While Drilling ? SonicScope The Next Generation of ... Wireline

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SonicScopeThe Next Generation ofSonic While DrillingMeretta QleiboLWD Petrophysics Domain Champion2AgendaQuadrupole: Why? and How?Introduction to Sonic ScopeLocal ExampleSummary3Why Multipole? Why SonicScope?GoalProvide high data quality in real timeDeliver a robust compressional and shear measurement for allformations, irrespective of mud typeObtaining reliable compressional and shear providesPore pressure trendsBorehole stability analysisGas detection/saturationAdvanced drilling optimization/fracture gradientAdvanced formation evaluation4From Monopole to MultipoleSonicScope Multipole tool Vp & Vs in all formations Enhanced real-time delivery StoneleysonicVISION Monopole tool Enhanced real-time delivery Vp & Vs in fast formationsiSONIC First LWD sonic tool Monopole tool Vp only19962004-20082008onwards5DipoleMonopole QuadrupoleReview of Borehole Acoustic Modes6Dispersive Waves, Flexural and Quadrupole Modes Slowness of the wave varies with frequencyStoneley waveDipole flexuralwaveQuadrupole waveDipole flexuralDipole flexural QuadrupoleQuadrupole7Why Quadrupole and Not Dipoles for LWD?Wireline tool Drill CollarFrequencyWirelinetool flexuralBorehole flexuralFormation shearNo interferenceWireline dipoleSlownessCollarflexuralStrongCouplingLWD dipoleSlownessFrequencyFast collarflexural modeBoreholeflexural modeBoreholequadrupoleCollar quadrupoleSlownessLWD quadrupole8SonicScope 825 Key Technologies 12 levels spaced at 90 degrees, 48 receivers total Industry best 4 inter-receiver spacing, aliasing completely eliminated Signal digitized at the receiver enables faster downhole processing 4 bulkheads vs. 28 for QBAT = stronger collar, simpler acoustic modeling High power to excite Quadrupole in slow formations Situated close to the receiver section to overcome attenuation Monopole collar arrival suppressed as low as possible I.D. optimized to separate QP propagation modes Enables Automatic Labeling, STC thresholdDual Layer Quadrupole Transmitter G42 Receiver BeltsScrew on Centralizers Optimized Attenuation Section Ensure mode purity Wellsite Changeable Hard Faced9Quadrupole Shear Inversion Model-Based Inversion Dispersive approach Account for tool presence effect Tool Presence Tool equivalent model Includes all tool details Quadrupole Inversion MethodologyHomogeneous Isotropic modelTool equivalent modelMaximizing the semblanceBoreholequadrupole modeMode Search RZX ModelingNote: Size of the dots indicate energyFrequency (kHz)Slowness(us/ft)Shear valueModeled Quadrupole ModeReal Quadrupole DataSlowness(us/ft)Frequency (kHz)Shear valueModel HIMeasured Data10Local Data Review SonicScope825 North West Shelf well 12 hole section, near vertical Fast and slow formations Wireline logging suite included Sonic Scanner11 Compressional delivered in real time Coherency plot and pumps off transmitted toenable QC of the data Pumps off test performed every stand Real time applications include seismic tie ins,pore pressure modeling and geomechanicsReal Time Operations40 us/ft 240PSP(RT)DTCO, DTSM(RT)12Data analysis of high-frequency monopolePSStoneleySlowFormationP StP S StPSStPStFastFormation13Data analysis of high-frequency monopoleFastFormationSlowFormationP StP S StPSPStStPSStPStSP14Shear from Quadrupole InversionShear slownessHomogeneous IsotropicQuadrupole dispersion curve15LWD(RT)LWD(REC)WL Comparison between SonicScope Realtime, memory data, and Sonic Scannerlog (Monopole only) Memory data from SonicScope and SonicScanner show excellent agreement Real Time data quality is as good asmemory mode data Shear data is available in Real Time fromMonopole only (fast formations)Sonic Scanner ComparisonFast Formation, Monopole16 Comparison between SonicScope 825Real time, memory data, and SonicScanner log (Monopole only) Monopole data in slow formation will not giveshear if Shear DT > Mud DT Compressional from Monopole approachingmud DT requires Leaky-P processingLWD(RT)LWD(REC)WLSonic Scanner ComparisonSlow Formation, Monopole17 SonicScope Quadrupole shear shows anexcellent match to Sonic Scanner Dipoleshear Shear DT acquired up to 540 us/ftLWDQuadrupoleWL DipoleSonic Scanner ComparisonSlow Formation, Quadrupole18 Sonic Scope service is now available in 4.75 and8.25 collars Robust compressional delivered to client in real time High quality waveforms enable data analysis and QC Excellent Agreement between SonicScope andWireline Sonic ScannerSummary19SonicScope Latest Schlumberger Generation of Real-Time LWD Sonic High Quality Monopole Data Multipole Capability Available in 4.75 and 8.25 collarsSonicScopeThe Next Generation of Sonic While DrillingAgendaWhy Multipole? Why SonicScope?From Monopole to MultipoleReview of Borehole Acoustic ModesDispersive Waves, Flexural and Quadrupole ModesWhy Quadrupole and Not Dipoles for LWD?Slide Number 8Quadrupole Shear InversionLocal Data Review SonicScope825Real Time OperationsData analysis of high-frequency monopoleData analysis of high-frequency monopoleShear from Quadrupole InversionSonic Scanner ComparisonFast Formation, MonopoleSonic Scanner ComparisonSlow Formation, MonopoleSonic Scanner ComparisonSlow Formation, QuadrupoleSummarySonicScope


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