Sonic Scanner - Wireline Cased Hole Logging | Schlumberger

Sonic Scanner

Acoustic scanning platform

Gain exclusive insight to your reservoir from 3D acoustic characterization

Sonic Scanner acoustic scanning platform accurately measures the stress-dependent properties in the near-wellbore region axially, azimuthally, and radially to fully support geomechanical modeling.

The integration of multiple monopole and dipole transmitters with 13 receiver stations profiles formations in 3D while simultaneously obtaining a cement bond log when run in cased holes.

How it works: Measuring the stress-dependent properties of rocks

Regardless of the formation type and slowness, the Sonic Scanner platform overcomes conventional acoustic measurement barriers through its wide frequency range, multiple monopole and dipole transmitter-receiver spacings, and full characterization.

The Sonic Scanner tool provides the bene- fits of axial, azimuthal, and radial information from both the monopole and the dipole measurements for near-wellbore and far-field slowness information.
The Sonic Scanner tool provides the benefits of axial, azimuthal, and radial information from both the monopole and the dipole measurements for near-wellbore and far-field slowness information.

See deep into your reservoir with new depths of insight.

3D Far-Field Sonic Service

Automated subsurface feature extraction

New 3D far-field sonic service extends sonic imaging far beyond the reach of standard sonic logging while also providing true dip and azimuth. The service automates what were previously manual tasks to efficiently and accurately determine connectivity for open fractures and identify subseismic structural features and formation layers, tracing them from the borehole wall through the near-field and far-field reservoir. You’ll significantly advance modeling of fractured reservoirs or conducting structural analysis with these rich far-field datasets and interpretations.

3D Far-Field Sonic Service
3x
Conventional logging speed
10x
Faster processing and analysis
3D
Deliverables plus 2D along-wellbore image
8
Azimuthal measurements from each of 13 receiver stations
3D Far-Field Sonic Service
3D Far-Field Sonic Service

Expedited acquisition, processing, and interpretation

A single logging pass of the Sonic Scanner acoustic scanning platform configured for acquisition with enhanced telemetry acquires 3D far-field and standard sonic data at up to 3× the speed of conventional sonic logging. Data acquired from the eight azimuthal receivers at each of the platform’s 13 stations provide both monopole and dipole waveforms to respectively enhance resolution and deepen the depth of investigation. The service’s efficiency continues through the automated processing and interpretation workflow, which delivers consistent, precise quantitative results up to 10× faster than conventional processing. The smart migration workflow directly associates each quantified event to features in the sonic image. Quality control is significantly improved while avoiding the bias that can be introduced by manual interpretation.

Imaging integration from the wellbore to the far field

3D far-field sonic service integrates results from borehole imaging logs to trace features from the near- to far-field reservoir. This seamless combination validates the near-wellbore structural environment while providing continuity for features that intersect the wellbore—as well as identifying and accurately placing those that don’t and would be otherwise undetected.

3D Far-Field Sonic Service
In this unconventional well in the Wolfcamp, Quanta Geo photorealistic reservoir geology service and Sonic Scanner service data were acquired in a single logging pass. The fractures identified at the borehole from Quanta Geo service imaging (blue discs) are displayed with 3D STC events from Sonic Scanner service (purple discs) on the migrated image produced using the Petrel* E&P software platform. Monopole data was used for high-resolution event analysis extending up to 15 m into the reservoir from this well. The completion was designed based on the intensity of the far-field fractures near the toe of the well (right).
Sonic Scanner
Acoustic scanning platform tool
Excellent resolution obtained from the Sonic Scanner tool compared with the surface seismic image.
Excellent resolution obtained from the Sonic Scanner tool compared with the surface seismic image.

Drilling design

Integrating data from acoustic measurements with wellbore images and reservoir testing, estimated pore pressures, stress magnitudes, and the fracture gradient refines the mud-weight window to avoid future drilling challenges. Layered shales and fractured formations are readily identifiable to enable drillers to better maintain wellbore stability.

Stimulation design

Properly contained hydraulic fractures are designed by using continuous stress profiles based on acoustic measurements because they account for shale layering and differential stress. The accuracy of stress profiles is honed by calibration with dual-packer stress tests and maps of wellbore failure occurrences from breakouts and induced fractures.

Completion design

Quantification of anisotropy in rock mechanical properties and determination of the maximum horizontal stress guide completion design for achieving optimal production, especially in highly deviated or horizontal wells accessing unconventional reservoirs or where sanding is a concern. Measurement of the extent of the alteration zone and damage effects is used to calculate the necessary perforation penetration, and achieving uniformity in perforation performance is based on understanding stress anisotropy.

Fracture evaluation

Distinguishing drilling-induced from natural fractures and using shear wave anisotropy and Stoneley wave data in conjunction with images to identify existing fractures as open or closed are important considerations for designing completions, targeting hydraulic fracturing, and maximizing production.

Seismic velocity modeling

Well velocity calibration accounts for shale layering and stress anisotropy to refine the time-depth conversion for more accurate analysis, tie-ins, and use in applications such as seismic inversion.

Microseismic modeling

Simulating complex fracture networks relies on calibration based on acoustic measurements for differential stress, geomechanical strain, and any existing discrete fracture networks.

Rock physics evaluation

Sonic Scanner platform logging can be used to relate physical rock properties to seismic data to improve the value of data in modeling.

Stoneley wave measurements enabled determination that the fractures were natural, not drilling induced.
Stoneley wave measurements enabled determination that the fractures were natural, not drilling induced.

Interpretation

Our petrotechnical experts work with you to apply advanced interpretation techniques and workflows to deliver answers from measurements made with the Sonic Scanner acoustic scanning platform.

Advanced sonic waveform processing and analysis provide critical information for completion optimization, sanding prediction, wellbore stability studies, and mechanical earth models. Shear wave splitting and orientation of the fast shear azimuth guide lateral well placement, and Stoneley analysis can indicate and characterize fractures as well as reveal formation mobility.

Interpretation Services for Sonic Scanner Acoustic Scanning Platform
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