Wireline openhole logging

Advance your understanding to optimize reservoir performance

Your reservoir, in full geologic detail

The ground truth for high-resolution information to address reservoir complexity and to guide and constrain modeling is conventional whole core. But, it’s obviously not practical to core and analyze the entire drilled well. Nor is the resolution and confidence of what can be interpreted from seismic data alone sufficient.

The industry’s recognized approach for efficiently acquiring representative information is wireline openhole logging, deploying sensors to measure all aspects of the reservoir in situ and in real time.

Get the answers you need for informed decision making and risk reduction from precise and accurate downhole logging measurements, delivered workflow-ready for interpretation and refining your reservoir model.

saturn 3D radial probe
MaxPULL high-pull wireline conveyance system

Wireline Conveyance

Integrated wireline and slickline systems for reliable, efficient conveyance.

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Formation evaluation characterizes rock and fluid properties based on downhole measurements, formation testing, and laboratory analysis services. Petrophysical analysis using a wide variety of measurements leads to an understanding of the reservoir and its detailed characteristics.

  • rendering of cmr magniphi
    High-definition NMR service

    Unlock the T₁ dimension to provide the most accurate lithology-independent porosity and fluids mapping for the smallest pores. View

  • dielectric scanner
    Dielectric Scanner
    Multifrequency dielectric dispersion service

    Acquire measurements that speak volumes. View

  • Integrated Wireline Platforms
    Integrated Wireline Logging Platforms
    Single toolstrings for standard, slim, and HPHT wells

    Get the complete picture of your reservoir and its fluid contents from accurately determined petrophysical properties measured by a single toolstring. View

  • rendering of lithoscanner
    Litho Scanner
    High-definition spectroscopy service

    Unlock the key elements of your reservoir—including stand-alone TOC. View

  • MR Scanner expert magnetic resonance service
    MR Scanner
    Expert magnetic resonance service

    Obtain NMR measurement of porosity, permeability, and fluid volumes independent of the rock matrix. View

  • Rt Scanner Triaxial Induction Service
    Rt Scanner
    Triaxial induction service

    Calculate vertical and horizontal resistivity from direct triaxial induction measurements and solve for formation dip to account for anisotropy and thin beds. View

  • pulsar spectroscopic logging
    Multifunction spectroscopy service

    Attain comprehensive formation evaluation in cased hole: one run, one tool. View

  • ThruBit
    Through-the-bit logging services

    A comprehensive wireline suite designed for advanced lateral measurements in horizontal wells. View


Measurements at scales from pores to sedimentary basins are analyzed and interpreted to develop micro- and macrogeological models. Knowledge of local and field-wide structure and variability helps to achieve optimal reservoir contact and guide well paths to avoid hazards.

  • high-definition formation microimager
    Fullbore formation microimager

    Image formation microresistivity in water-based mud, including deviated and horizontal wellbores. View

  • high-definition formation microimager
    High-definition formation microimager

    Visualize water-based mud environments in high fidelity and clarity. View

  • OBMI Oil-Based Microimager tool
    Oil-based microimager

    Visualize the reservoir with microresistivity imaging in oil-based, nonconductive, and invert-emulsion mud systems. View

  • rendering of the quanta geo service
    Quanta Geo
    Photorealistic reservoir geology service

    Truly visually represent formation geology with core-like images in oil-based mud. View

  • UBI Ultrasonic Borehole Imager
    Ultrasonic borehole imager

    Analyze fractures, stress, and borehole stability with advanced borehole imaging independent of mud type. View

  • ThruBit
    Through-the-bit logging services

    A comprehensive wireline suite designed for advanced lateral measurements in horizontal wells. View


Rocks have a wide range of stiffness and strength and are exposed to variable stresses during drilling, completion, and production. Downhole acoustic measurements and laboratory core analysis provide input for geomechanical modeling to efficiently develop, produce, and ultimately abandon reservoirs.

  • Sonic Scanner
    Acoustic scanning platform
    Sonic Scanner platform for downhole acoustic measurements

    Gain acoustic insight to anisotropy and formation geomechanics in wells at any angle. View

  • ThruBit
    Through-the-bit logging services

    A comprehensive wireline suite designed for advanced lateral measurements in horizontal wells. View

  • InSitu Geomechanical Profiling
    InSitu Geomechanical Profiling
    Advanced workflow using InSitu downhole quantitative properties measurements

    Building a robust, real-time, and precise representation of your mechanical earth model. View

Reservoir Engineering

Reservoir engineering provides an understanding of fluid flow and phase behavior at all scales, for all fluids, and in all geological settings. Formation pressure measurement, downhole fluid sampling and analysis, and laboratory PVT analysis are used to build a picture of reservoir potential and predict future performance.

  • Ora intelligent wireline formation testing platform
    Intelligent wireline formation testing platform

    Experience your reservoir like never before. View

  • Saturn 3D Radial Probe for Fluid Sampling and Pressure Measurement
    3D radial probe

    Perform formation testing where previously not possible. View

  • InSitu fluid analyzer
    Real-time downhole fluid analysis system
    InSitu Fluid Analyzer

    Describe the entire reservoir fluid system in real time by scanning fluid properties downhole in different reservoir zones. View

  • Formation evaluation sampling
    Wireline Formation Testing
    Formation pressure, downhole fluid analysis, fluid sampling, and sidewall coring

    Determine how fluid behaves in the reservoir by collecting data at reservoir conditions. View

  • 3D abstract render of a core with compontents shown as blocks and spheres
    Sidewall Coring
    The efficient way to sample your reservoir

    Understand the reservoir rock and its fluid contents. View

  • Quicksilver Probe Focused Fluid Extraction
    Quicksilver Probe
    Focused fluid extraction

    Collect virtually contamination-free fluid in a fraction of the time. View


Large-scale sensing finds reservoirs in all types of environments, providing the basis for a 3D reservoir model with physical properties at all scales. Geophysics provides the “big picture,” while wellbore-scale seismic and petrophysical data deliver formation understanding in detail.

  • Borehole Seismic
    Integrated borehole seismic system

    Image around the borehole in high resolution with integrated borehole seismic services. View

  • Crosswell seismic imaging
    Crosswell seismic imaging service

    Achieve seismic imaging at the reservoir scale. View

  • Optiq fiber-optic solutions
    Fiber-optic solutions

    Harness the power of light for multidomain measurements in a fraction of the time of conventional methods. View

  • Optiq Seismic fiber-optic borehole seismic solution
    Optiq Seismic
    Fiber-optic borehole seismic solution

    Improve efficiency of borehole seismic operations by eliminating the need for a dedicated seismic descent. View

  • Seismic Focal Point
    Real-time induced seismicity monitoring service

    A cloud-based system providing prompt notification of local seismic events that affect regulatory compliance. View