Joint VTI and Mud Slowness Inversion Using Multiple Modes and Adaptive Weighting

Mark Collins

Unconventional Resources Technology Conference (URTEC)

... on borehole properties, primarily mud speed, borehole radius, mud density, and acoustic coupling to the tool. The Stoneley mode is sensitive to mud...

Fullwave Sonic Analysis: New Methodologies for Characterizing Near-Wellbore Reservoir Properties

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Abstract: Fracture and Fluid Prediction from Full-Wave Sonic Data by Higher-Order Normalized Differential Energy Methods; #90319 (2018)

Xuekai Sun, Chris Ayadiuno

Search and Discovery.com

... differently on the 2nd-order NDE result using low-frequency Stoneley waves, which may suggest a potential method for fluid identification...

Abstract: Lamb Waves Recorded in Microseismic Monitoring Wellbores; #90174 (2014)

Andy St-Onge

Search and Discovery.com

.... Stevens and Day (1986) discuss Stoneley waves as a tool to measure shear velocities. Lamb waves are a type of surface wave that can propagate...

Looking Fractures Around the Wellbore: First Successful Azimuthal Dipole Sonic Imaging in a Carbonate Horizonal Well in China

Yu Zhang, Haidong Liu, Honglin Xiao, Xiaoming Zhang, Bo Liu, Yanyan Chen, Zheyuan Huang, Cai Liang, Wei Wang, Guo Wei, Gamal Sultan, Elizabeth Ruiz

Unconventional Resources Technology Conference (URTEC)

.... Integrated Fracture Analysis Borehole images, Stoneley waveform and azimuthal dipole sonic imaging are all able to detect fractures using different physics...

Full Wave Acoustic Logging: Some Examples

John W. Minear

Southeast Asia Petroleum Exploration Society (SEAPEX)

...-wave acoustic signal is composed of four main types of waves: compressional, shear, pseudo-Rayleigh and Stoneley. Compressional and shear waves...

Abstract: Off-Center Transmitters and Receivers in Acoustic Logging: Modeling and Observations; #90213 (2015)

Denis P. Schmitt and W. Canady

Search and Discovery.com

... be strongly affected. With a dipole source, the interference between the flexural mode and the Stoneley wave can be significant. The effects increase...

LWD Geosteering and Natural Fracture Identification in Horizontal Wells in Unconventional Reservoirs

Greg Meszaros, Paul Boonen

West Texas Geological Society

..., shear and Stoneley waves and to determine the relative amplitudes of the different arrivals. A plot of the raw waveform can be an excellent fracture...

Monopole slow formation shear head wave Greens function in a LWD borehole acoustic configuration

Tim Geerits, Stefan Schimschal, Anna Swiatek

International Meeting for Applied Geoscience and Energy (IMAGE)

... the fundamental wave types (head waves and borehole guided modes) that make up the full waveform. This opposed to the Real Axis Integration (RAI) method...

Borehole tube wave generation by an incident P-wave at a fluid-filled fracture

Abdullah Alsawidan

International Meeting for Applied Geoscience and Energy (IMAGE)

... at a fluid-filled fracture Abdullah Alsawidan*, Aramco Summary Borehole guided waves (tube waves) are dominant acoustic waves in borehole seismic...

Drilling Risks Associated with Hydraulic Fractures and Reactivating Faults due to High Mud Weight/Pore Pressure and Miti (Paper B13)

A. A. Bal, D. Maya, K. K. Kyi, R. Guha, M. I. Gabreldar, D. Abang Indi

Geological Society of Malaysia (GSM)

... Patterson for assistance in processing the the compressional body waves generated by the dipole which allows us to see the fault beyond the borehole...

Imaging near wellbore fractures by using Stoneley wave

Xuekai Sun, Jun Zhou, Chunhao Yu, Xiugang Ma, Chris Ayadiuno, Jufeng Zhou

International Meeting for Applied Geoscience and Energy (IMAGE)

... actually hamper the performance of Stoneley Wavefield Separation Wave separation is a most effective way to analyze and interpret borehole acoustics...

Analysis of Critically Stressed Fractures and Impact on Field Development in a South Sumatra field

Anzar Syed Islam, Lia Wisanti, Aditi Pal, Budi Satrio, Mohammad Himawan Prakoso, Galih Regi Ramadhan, Anggie Askari Pajabada, Mohamad Taufik

Indonesian Petroleum Association

... the image log. Figure 3 also shows the sonic Stoneley analysis results. Borehole travelling Stoneley waves can be used to determine open fractures from...

Depositional Architecture and Petrophysical Variability of an Oolitic Tidal Sand Shoal: Pennsylvanian (Missourian), Kansas, U.S.A.

Eugene C. Rankey, Hamilton Goodner, John Doveton

Journal of Sedimentary Research (SEPM)

... at the interface between the borehole and the formation. As these waves pass through formations, the borehole wall alternately expands and contracts...

Abstract: Integration of Permeability Estimates from Logs, Welltests and Cores, Neuquen Basin, Argentina, by M. Schiuma, M. Claverie, and M. Sanguinetti; #90933 (1998).

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Flexural and Full Wave Logging Using the Low-Frequency Dipole Sonic

David E. Sharbak

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... routine. The full wave tools also introduced Stoneley wave logging. The Stoneley wave is a guided (body) wave traveling both down and up the borehole...

Effects of tool eccentricity on acoustic logging: Theory and field example

Bo Rao, Yuanda Su, Shengqing Li, Xiaoming Tang

International Meeting for Applied Geoscience and Energy (IMAGE)

... is affected due to the coupling of monopole and dipole mode waves. Following the quadrupole wave, a high-amplitude Stoneley wave component appears...

Integration of Seismic and Log Data of a Deep Borehole in the Basement Rocks of Northeastern Alberta; #41517 (2015)

Judith Chan, Douglas R. Schmitt

Search and Discovery.com

... tube waves (Figure 4). Data quality becomes increasingly poorer as depth increases due to the poor geophone coupling to the borehole wall in an open hole...

Abstract: Integrated Fracture Evaluation of a Malaysian Basement Well Drilled with the Oil-Based Mud (Poster 23)

Edna Malim, Saifon Daungkaew, Steve Hansen, Aung Than Oo, Riasat Hussain, Simon Christian Kurniawan, Zairul Asrah Zulkefli

Geological Society of Malaysia (GSM)

... results with dual packer wireline formation tester (WFT), Sonic Scanner reflection imaging and Stoneley data. The borehole image was crucial in selecting...

Multipole borehole acoustics in the presence of an constraints elastic tool

Tim Geerits, Stefan Schimschal, Anna Swiatek

International Meeting for Applied Geoscience and Energy (IMAGE)

...Multipole borehole acoustics in the presence of an constraints elastic tool Tim Geerits, Stefan Schimschal, Anna Swiatek Multipole Borehole Acoustics...

Analysis of geologic structures using deep sonic imaging

Nobuyasu Hirabayashi, Leon Dahlhaus, Rajeev Kumar, Jeroen Jocker, Erik Wielemaker, Manish Lal Khaitan, Charles Naville

International Meeting for Applied Geoscience and Energy (IMAGE)

... and applied to field data to verify our methods. Figure 1 shows the flowchart of the deep sonic imaging workflow. First, Stoneley waves are removed. Next...

Advances in Sonic Logging … A New 3 Dimensional Acoustic Log Measurement

Frank Wijnands

Indonesian Petroleum Association

... dimensional measurement of acoustic and elastic wave propagation around the borehole. In addition to axial and azimuthal measurements of compressional...

Abstract: Evaluating VTI Anisotropy in Shale Using New Borehole Sonic Measurements for Improving Seismic Ties ; #90055 (2006).

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ABSTRACT: A Fresh Look for Natural Fracture Characterization Using Advance Borehole Acoustics Techniques, by Velez, Edgar I.; Lujan, Violeta ; Veltman, Willem; #90142 (2012)

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ABSTRACT: Stress Profile Estimation Using Sonic Logs; #90007 (2002)

Xiaojun Huang, Zhenya Zhu, Daniel R. Burns, M. Nafi Toksoz

Search and Discovery.com

... Experiments have long proved that both P- and S-wave velocities of rocks are functions of applied stresses. Borehole sonic logs then surely carry...