LWD Geophysics

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LWD Geophysics Acoustic ShockWave

Weatherford drilling services geophysics solutions feature targeted resources that gather dynamic data concerning the physical structure of the formation.

From compressional and shear-slowness values for identifying anisotropy to information for calibrating velocity models, Weatherford logging-while-drilling (LWD) geophysics services provide the answer products in virtually any borehole.


LWD Geophysics CrossWave 1H14a

Understanding and updating geophysical models while drilling can help you avoid potential drilling hazards and improve well placement.

Acquisition and analysis of LWD geophysical data are used to calibrate the velocity model and mitigate drilling risks. An updated velocity model can lead to potential total depth (TD) changes or variations from the initial well path which, if not made, could cause decreased production or drilling into an unstable zone.

Within our portfolio of geophysical services, we provide the ShockWave® sonic tool, which delivers wireline-quality acoustic measurements while drilling.

ShockWave is designed to provide insight to the intricacies of the formation and characterize the reservoir, which promotes greater drilling efficiently and increased production for your well. This is done by supplying an accurate time/depth correlation for velocity-model improvements as well as pore-pressure evaluation, and compressional and shear slowness for identifying areas of anisotropy and predicting fracture propagation.

LWD Geophysics_wi_visean

Combining acoustic geophysics measurements with downhole rotating assemblies provides an intricate picture of the wellbore while drilling.

The CrossWave® azimuthal sonic tool provides a 360 degree wellbore image of the geomechanical and geophysical properties. This allows insight into the directional anisotropy of the formation. This ability to show compressional and shear velocities as well as geomechanical properties (including Poisson’s ratio and Young’s modulus directionally around the wellbore) helps identify anisotropy and can allow the operator to optimize stimulation design and execution.


Weatherford LWD geophysics allows fundamental analysis and correlation to exploration models in real time. Combining an overall understanding of the reservoir with intricate details of the physical structure of a formation creates a roadmap for achieving greater production and optimized stimulation programs.

 

Available LWD Geophysics Technologies

ShockWave®

Reliable and versatile LWD data

The Weatherford ShockWave sonic tool provides robust, reliable, LWD sonic data for key real-time applications such as seismic time-depth correlation, pore pressure determination, and porosity evaluation. The high-output transmitter and unique attenuator design combine with advanced acquisition modes and real-time processing techniques to provide accurate, reliable data in the widest variety of downhole conditions—pressures to 30,000 psi (207 MPa) and temperatures to 329°F (165°C).

Geophysics Applications

  • Seismic depth correlation

  • Pore-pressure evaluation

  • Gas detection from Vp/Vs ratio

CrossWave®

Reliable 360° azimuthal imaging in challenging wells

The Weatherford CrossWave azimuthal sonic tool provides both total sonic measurements and 360° azimuthal sonic borehole images. As the drillstring rotates, the transmitter fires a sequence of acoustic waves into the formation. These waves are refracted back to the receivers and stored in 16 fixed orientation azimuthal bins. Processed in the bins, the waveforms yield azimuthally oriented borehole images of compressional and refracted shear images. The unique tool hardware―a directionally focused, high-output transmitter, a powerful attenuator section, and receivers isolated from the body of the collar―allows the CrossWave tool to provide accurate, reliable data in the harshest environments.

Geophysics Applications

  • Seismic-depth correlation

  • Pore-pressure evaluation

  • Gas detection

  • Formation mechanical properties and 360° rock mechanical properties images
    (Young’s modulus, Poisson’s ratio, and brittleness index)

  • 360° compressional and shear slowness borehole images

  • 360° anisotropy images

PressureWave

Mission-critical formation pressure and fluid-mobility information in challenging wells

The Weatherford PressureWave formation tester provides direct measurement of the formation pore pressure. When used with the HEL(hostile-environment-logging)-LWD suite, the PressureWave formation tester also delivers mission-critical formation pressure and fluid-mobility information, allowing safer drilling and a more comprehensive evaluation program. The tool takes fast, reliable formation pressure measurements with pumps either on or off. While testing with pumps on, data can be transmitted as fast as one pressure measurement every four seconds with 1/2-psi resolution. High-resolution 32‑bit pressures are recorded at five samples per second into memory. This data enables clients to make informed decisions about the reservoir and formation potential early in the life of the well while reducing drilling risk with direct measurement of pore pressure.

Geophysics Applications

  • Mechanical properties confirmation

  • Direct measurement of pore pressure in real time

  • Developing and updating reservoir models while drilling

Visean information service

Web-based, real-time LWD data

Weatherford Visean information service delivers critical LWD wellsite data over the Internet in real time, which streamlines information flow and enables clients to more effectively leverage their highly skilled personnel. The service integrates a suite of powerful tools to support visualization, printing, export, and real-time reporting of all critical mud-logging and electronic-drilling-recorder data.

Geophysics Applications

  • Remote real-time monitoring of LWD data

  • Support for mud logging and drilling recorder data

  • Management of drilling-project-related documents and reports