HOLE CLEANING EFFICIENCY (HCE)
Quantifying Hole Cleaning Efficiency is arguably one of the most important drilling performance metrics needed to successfully drill a well.
The use of a Material Mass Balance on all mud components entering and exiting the well is tracked at multiple stations throughout the circulatory system. At each station the mud density, the volume & mass of water, oil and solids are all compensated for gas, compressibility and temperature.
Quantifying HCE has deep roots into the Management of Risk associated to Health, Safety, Environmental and Overall Costs. The real time data used to quantify hole cleaning efficiency also helps reduce the risk of well control incidents, safety and environmental infractions, stuck pipe, casing running issues, poor wellbore placement, the list goes on. Reduce the risk, reduce the costs associated to the risk.
SOLIDS REMOVAL EFFICIENCY (SRE)
Quantifying Solids Removal Efficiency has interrelatedness in just about every workflow on the rig. It's not only important to quantify but to optimize as it has significant cost implications.
Solids Removal impacts the amount of dilution required to drill the well, it impacts the volume of waste disposal, it impacts equipment wear and downhole tool failures, it even impacts wellbore placement and production economics.
Solids Removal has deep roots in the Environmental Social Governance space, specifically in the reduction of Greenhouse Gas Emissions. The cleaner the mud system, the lower volume of waste disposal, fewer trucks hauling waste, fewer GHG emissions. Cleaner mud system also helps reduce diesel consumption via the generators, fewer GHG emissions.
SENSOR SYSTEMS:
Mud Density IN and OUT of the well provides the basic data needed to quantify hole cleaning efficiency. TPA & PBD sensors provide this data.
Add SiCon to the active mud tank, this provides a compositional material mass balance of the hole cleaning process.
Add SED sensor downstream of the primary shale shaker to help quantify shaker efficiency and determine how much drilled solids has been removed from the mud. The SED sensor also couples as a feed density to the centrifuge.
Add a SED sensor to the drying shaker effluent to help determine drying shaker efficiency, help determine how much volume/mass of each component is gone out as a waste stream. The SED sensor couples as a feed density to the centrifuge.
Add a CNI sensor to the centrifuge effluent line to determine centrifuge performance. Mass rate in and out of the centrifuge helps with real time optimization, increase solids removal efficiency. Add a SiCon sensor to the centrifuge effluent line to help parse out the mass of oil, water, LGS & HGS being returned back to the active. Allows for the determination of how much of each component is going out as waste at the centrifuge discard.
Add OWD Sensors to quantify the volume of base oil & water being added as dilution in real time. This allows for the determination of a real time solids removal determination.
Add level sensors to the frac tanks to monitor all volume transfers in and out of the active system in real time. Add a small Coriolis to the transfer line between the frac tanks and the active. This will help with tracking the density of comingled mud in the frac tanks.
Each sensor system is a standalone application.
24/7 Real Time Monitoring and Data Analysis in an RTOC (RT Ops Center) setting to support/advise the decision makers by detecting early symptoms for early intervention and mitigation to drill the well safely to TD with least cost per foot.
This is where our real time monitoring engineers with typically decades of drilling optimization and SME in the use of emerging technologies for drilling come in.
People and Systems involved:
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