Mud SentriX™

Mud SentriX™ - helping you optimize mud weights & mud mixing, reduce costs, improve well bore integrity, reduce wellbore risks, and improve hole cleaning.

Do you really know what your mud weight is?

In reality, actual mud weights will often significantly and rapidly change, based on borehole conditions while drilling and also due to mud mixing and handling on surface, particularly during weighting up. MezurX has recorded actual mud weights that were many % different from reported values, potentially putting both the borehole and drilling rig at risk if unexpected events occur. Don't let this happen to you.

Key Features and Benefits

  • Accurate and continuous real-time mud weight measurements
    • Optimize mud mixing and weighting up
    • Improve overall homogeneity of the mud system
    • Avoid slugs of overweight or underweight mud circulating through the wellbore.
    • Reduce reliance on manual measurements prone to human error.
    • Record continuous log of mud Density In and Out
  • Industry's first real-time Barite Sag Detector
    • Reduce wellbore risk and optimise mud properties to prevent it re-occurring
  • Improve wellbore integrity and reduce tight hole conditions
  • Establish lag times from profiles of mud Density In versus Density Out.
    • More accurate and realistic than gas calculated lag times
  • Hole Cleaning
    • Determine when the borehole is clean
    • Save unnecessary circulating time and eliminate NPT

System Overview

The key components of Mud SentriX include:

  • Robust and accurate sensors for measuring Pit Density, Density In and Density Out.
    • Pit density sensors can be installed in multiple pits to provide continuous real-time pit mud data (density, temperature, level, volume)
    • Density In sensors typically located downstream from the mud charge pumps
    • Density Out sensor locations are determined based on rig design
  • Centralised server
    • aggregates data from the MezurX sensors as well as 3rd party data providers using WITS0, WITSML, OPC and other protocols
    • logs data to a historian for subsequent review, analysis and reporting
  • Real-Time screens for key rig personnel
    • Audio and visual alarms
    • Multiple pre-configured displays to provide all key information in optimum layout

More Information

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» Enhancement of Mud Weight Management Process

As with many rigs today including the most modern, Mud Weight is measured manually with a mud balance on discrete intervals.

The MW manual measurements (superimposed “red dots”) proved inadequate for mud management as it showed that MW remains on target. Real Time MW measurement above was provided to initially only show current practices – MW gradient of 0.5 ppg and >0.2 ppg than target MW turned out as typical then.

With Real Time MW made available to the mud management personnel, the instantaneous tracking allowed them to keep close to the target MW at all times and reduced deviation by 76% - MW drifting more than 0.2 ppg from target has become a rare occasion.

“…system has helped us make the wells safer and stabilized ECD by maintaining correct mud weights at the surface”

—Quoted from a Mud Engineer of a leading global company with 9 years experience:

» Hole Cleaning

As likely the case for most operations - cleaning out the wellbore during reaming or upon reaching section TD is determined by indirect techniques like counting number of Bottoms Up circulations or periodic checks of MW Out.

Augmenting MW In with true MW Out measurement - representative of wellbore mud weight with all suspended cuttings – allows a reliable tracking of effectiveness of solids removal from the wellbore.

Above is an example of the rig carrying out a specified number of multiple bottoms up circulations which still turned out to be insufficient in achieving a clean borehole.

Above is an example of where a clean borehole was achieved. In this case, hole cleaning activity could have been concluded earlier, saving at least 1 hour of rig time.

» Barite Sag

The severity of barite sag – where heavy mud particulates settle toward the bottom of the wellbore creating sections of lighter and heavier mud – increases with higher-angled wells. Once detected, improvements may be done in reducing non-circulating periods and improving mud rheology to keep heavier particulates suspended longer.

In addition to MW In, a true and continuous measurement of MW Out is crucial to detecting this potentially catastrophic phenomenon as it exposes open borehole to kick-inducing light mud column followed by fracture-inducing heavy mud column.

Concerned operators already approximate Barite Sag by using mud balance measurements. Initial continuous waveform exposed severe sagging where 13.2 ppg mud developed a section 1.7 ppg heavier (14.7 ppg) followed shortly with a 0.6 ppg lighter mud for a total Sag Range of 2.3 ppg.

The above waveform is a subsequent Barite Sag event for the same operator, after some stricter mud rheology implementation. A subtler 1.0 ppg Sag Range was experienced.

» Gas Detection

As MezurX MW Out sensor reacts to presence of any type of gas (which has broken out of solution) in the mud, it serves as the likely earliest indicator of gas. Above (encircled events): non-hydrocarbon gases were present which a 3rd party gas detector did not see..