Compact Microimager Tool


Provides highly precise formation images in conductive muds with industry leading conveyance options


  • Visualizing complex structures
  • Identifying the location and orientation of faults and fractures
  • Determining structural dip
  • Defining crossbeds, thin beds, and net-to-gross ratio in sand-shale sequences
  • Identifying sand-shale facies and sand counts
  • Evaluating secondary porosity
  • Performing depth matching
  • Determining core orientation and substitution
  • Analyzing formation structure, borehole breakout, and true vertical depth

Features and Benefits

  • Eight pads with 176 measurement electrodes and excellent dynamic range measurement electronics deliver accurate microresistivity measurements and detailed, fullbore images that enable improved geological interpretation and help operators make better decisions about well placement and completion designs.
  • Two offset, four-arm caliper mechanisms maintain pad contact and provide six independent caliper readings. The upper calipers provide tool centralization while the lower calipers act independently.
  • Onboard flash memory stores high-resolution images in the time domain, independently from data logged via wireline.
  • Reveal 360° image processing reconstructs and improves images created from wireline logging data by incorporating values obtained from Compact microimager (CMI) measurements.
  • The CMI tool can be used with Assure™ conveyance systems for improved operational efficiency and reliability. The 10 Assure conveyance systems offer options for successfully logging wells with challenging borehole conditions that impede the use of conventional tools.
  • For thru-drillpipe applications or wells with extremely small borehole sizes, the CMI can be configured with pads that result in a maximum OD of only 2.4 in. (61 mm).
  • The CMI can be configured without pads for use as a multi-arm caliper tool.

Tool Description

The Compact™ microimager (CMI) provides high-quality formation images in water-based muds. The excellent borehole coverage and high-resolution imaging capabilities of the CMI enable enhanced reservoir characterization for more informed reservoir decisions.

The CMI consists of a memory section (MIM) and a measurement section (MIE). High-resolution, time-based data is recorded into the MIM while 3.937-in. (10-cm) log quality control data is transmitted to surface. This tool can be run in multiple configurations for use in diverse applications.

The CMI is compatible with Reveal 360° image processing, a patent-pending processing technique that combines microimager measurements with wireline data to produce a comprehensive image of the reservoir.

Weatherford also offers interpretation and processing services (IPS), which provide a range of formation evaluation solutions that inform critical operational decisions. Weatherford IPS analysts use advanced processing and interpretation technologies to deliver results that incorporate imaging, acoustic, petrophysical, and well-integrity data froma number of sources. Used in combination with the CMI, IPS helps to monitor, understand, and optimize well performance.