Qemscan Wellsite

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Система автоматизированной минералогии для геолого- технологических исследований, адаптированная к полевым условиям. Заказать оборудование QEMSCAN WellSite в компании ТехноИнфо

QEMSCAN® WellSite™ is a solution facilitating advanced mudlogging services during remote on- and off-shore drilling operations.Mudlogging commonly complements down-hole (in-situ) logging using remote sensing technologies known as wireline or logging while drilling (LWD). Rock cuttings, returned to the surface through the circulating drilling mud, represent the tangible evidence of the subsurface geology, and therefore a description and/or analysis of cuttings is a cost effective method to obtaining valuable complementary data on the stratigraphy of the drilled sequence. Optical description of cuttings is a common activity of mudlogging services; however, the process of optical cuttings description is manual, labor-intensive and qualitative, as echoed by well-site geologists: ”we always ask for an experienced mudlogger, but never get one”.

QEMSCAN WellSite was developed with 2 objectives in mind:

  • Provide a solution for automated and quantitative cuttings descriptions, providing more accurate and detailed information than manual and qualitative methods.
  • Provide a sample preparation and analysis workflow to deliver quantitative cuttings descriptions in near real-time at the well site, ready for seamless integration with logging data provided by integrated and independent service providers, particularly LWD and wireline.

Whereas many emerging advanced mudlogging technologies are primarily bulk cuttings analysis methods, QEMSCAN WellSite is essentially an imaging technique providing petrographic images of individual particles in a mud sample. QEMSCAN WellSite uses this feature to digitally screen particles in a mud sample in order to separate cuttings particles from other particles such as cavings, swarf or drilling additives. A unique 4-step data analysis workflow deconvolutes a bulk sample into cuttings properties on a lithology basis, providing superior confidence in rock properties obtained from cuttings.

Qemscan WellSite features:
  • A solid solution for automated mudlogging, that provides more accurate data then commonly used optical description
  • Optimized sample preparation workflow that makes it possible to prepare and investigate your samples in real time while welling
  • Система отличается выдающейся надёжностью и отлично адаптирована к применению именно в полевых условиях.The system is tested is rig enviroment- you can be sure that it won`t fail
  • Samples, prepared by this system, are comfortable in transportation and may be investigated later

  • Petrographical images obtaining with concrete particles finding in a mud sample
  • Rock mineralogical construction and it`s microtexture obtaining
  • Geological cross-section characteristics determination in the real-time mode
  • Perticles to cuttings

Once the numerical mineral maps have been acquired by the system, image analysis allows for digital screening to remove particles below a size attributed to drilling mud – typically < 63 micrometers. Subsequent contextual screening removes particles attributed to caving, swarf and drilling additives, each identified on the basis of textural and/or compositional properties that differentiate them from genuine cuttings. Relevant parameters derived from this screening include cuttings versus drilling additives ratio (measure of percentage returns), or cuttings size and shape (measure on drilling performance and stress fields).


  • Cuttings to Lithologies
The nature of cuttings collection at a constant sampling (i.e. depth) interval ensures that multiple rock types (lithologies) are likely to be represented within a single sampling interval. While bulk cuttings analysis techniques cannot take this lithology variation into account, QEMSCAN WellSite separates the cuttings into lithology classes, using mineralogy and texture-based lithology classification rulesets. While QEMSCAN WellSite comes pre-configured with standard lithology rulesets, these can be customized at the well site prior to cuttings collection, or applied retrospectively during or after the drilling activities, on- or off-site.
  • Lithology to properties

The next level of analysis is the determination of specific lithology properties, such as:
• modal mineralogy
• clay typing (glauconite / micas, radioactive clays, swelling clays)
• K-feldspar abundance
• quartz grain size
• calculated matrix density (inferred)
• trace mineralogy such as pyrite or apatite
• calculated matrix elemental chemistry (inferred)
• organic particle abundance commonly encountered in gas and oil
shale plays
A variety of preconfigured reports are available for reporting each of the above properties for any given batch of depth intervals. Additional report templates can easily be created and retained for future use.

  • Properties to Logs

Finally, each of these properties can be easily exported for incorporation into 3rd party logging software, such as ODM™, for subsequent interpretation by petrophysicists or reservoir evaluation specialists. Results from the two field tests demonstrate excellent consistency between the conventional mudlog cuttings descriptions and those obtained by QEMSCAN WellSite on the one side, but on the other side superior resolution and detail of mineralogy and texture, from which specific properties such as cuttings / additives ratio, lithology, clay type, or calculated matrix density can be derived with significant confidence.