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geoNEXT™ II is a system designed to deliver information with confidence, to assist drilling and geology teams alike in getting to the NEXT stage of the Drilling Program in a more effective manner, improving decision making in various ways. geoNEXT™ II builds on Geoservices tradition, begun 30 years ago with the introduction of the first computerized Mud Logging Unit run by high profile engineers, the “TDC”, followed by the world-renowned ALS™.

By combining the latest in information technology, new sensors, advances in real-time data analysis and processing, context-specific panels, the latest industry-standard models and experienced engineers - geoNEXT™ II provides a modern, complete monitoring service to satisfy both the drilling and geology departments of an operator. As market leader in Mud Logging and real-time surface data monitoring, Geoservices realizes that extracting the most value out of this data requires fast real-time processing, analysis, and interpretation in one efficient system – delivering not just data, but information relevant to the context for the people faced with decision making.

geoNEXT™ II is designed with safety in mind from the beginning and provides several new features to further reduce the risk of dangerous conditions. All components including sensors, gas extraction equipment, field boxes, cabling and processing hardware are all fully ATEX-certified and capable of operating to the highest rig standards in the toughest environments. geoNEXT™ II is the first Mud Logging system built on an ATEX-certified network of digital signals.

Any real-time monitoring system is only as good as the sensors at the end of the line that relay data. In a standard Mud Logging system, with analog signals and a multitude of cables running across the rig, failures can be difficult to trace or even spot. Interference from other equipment or machinery on the rig can cause false signals. Sensors are frequently placed in difficult-to-access areas of the rig where it may be difficult to properly maintain them. With geoNEXT™ II’s digital-certified network, conversion from analog to digital signal is made as close to the sensor as possible. This allows all parameters and sensors to be quality controlled in real-time. Incorporating a unique capability for very high frequency acquisition, it provides data that offer benefits and an insight into wellbore conditions never seen before. The resolution of such signals gives a much better definition of the monitored parameters.

The high-frequency data processing provides most benefit when monitoring drilling efficiency and mechanical drilling issues such as Torque & Drag and Vibrations. Downhole conditions can now be assessed from the surface and provide either an alternative to, or a backup in the case of failure of, downhole tools. When working conditions are too severe for the use of downhole tools (as for drilling Deep Buried Reservoirs), geoNEXT™ II is the only existing alternative.

The advanced features and data processing and analysis capabilities of geoNEXT™ II produce very large volumes of information and data. One special focus in the development of geoNEXT™ II was the way that information is relayed to the appropriate personnel and displayed in real time.

For most users, the primary interface with geoNEXT™ II will be the RTCP (real-time control panel). This is a flexible, dynamic screen that can be modified by individual users. This will be the window opening up all the possibilities the system enables, not only to personnel on the rig such as the company man, toolpusher, wellsite geologist, driller, but also to users in the client’s office with our Remote Service delivery; all have the capability to modify their own screens so that they always have the information they want. Changes are easy to make and can be done without any input from the logging unit.

The enlarged computation capacity allows for processing complex data faster and handling high-frequency signals to deliver information more rapidly. This increases the time available before a critical decision has to be taken.
Various applications take advantage of this feature like Flow Back or the synchronization of data at bit, vibration detection.

geoNEXT™ II is a “context-aware” smart system – the real-time applications are able to deduce the situation on the rig and identify the current operations automatically. This allows a specific combination of parameters to be tracked and displayed on real-time screens as the situation warrants. Features such as this reduce the engineers’ manual tasks and allow them to focus more on analysis and interpretation. An example of this is Flow Back – when the rig pumps are stopped an automatic flow back fingerprint is captured and displayed on screens – the previous 9 fingerprints are also displayed for quick and easy visual reference, and the date/time and depth of the fingerprints are stored in the Event Log for easy future reference and compilation.

The advanced Drilling Mechanics features of geoNEXT™ II result from a combination of new sensor technology, high-frequency acquisition, digital sensor signals, increased computing power and dedicated application. This provides monitoring of downhole conditions entirely from surface with a result equivalent to that of downhole tools. Mastering these vibration detection techniques remains a challenge that only a specialised engineer can approach confidently.

The geoNEXT™ II Vibrations package provides monitoring of Axial (bit bouncing) and Torsional (stick-slip) vibrations. Primary measurements are based on Weight-on-Hook, RPM and Torque sensors. A real-time application uses Spectral Analysis and Fourier Transform Techniques to identify the Vibration Energy and the Peak Frequency of the given vibrations.

Real-time alarms are set on this data at safe, mid and high levels to provide instant warning on the drill floor, where drilling parameters can be adjusted to mitigate the damaging vibrations that can induce poor ROP, shorter bit life, damage to the drill sting and the top drive system. Offline processing of the associated logs and plots allows for optimization of drilling parameters to improve conditions and prevent further problems from occurring.

The wellbore stability and the efficiency of cleaning actions can be assessed in real time and annotated on the chart: circulation of pill, back reaming, wiper trip, recorded tight spots. This is forwarded to the tripping marker table available from the Real-time Control Panel. Combining real-time data with Empirical Models – setting the baseline for interpretation - provides the most accurate analysis of drilling conditions. geoNEXT II™ contains a package of industry-standard models to provide theoretical values for parameters such as pick-up, slack-off and free-rotating weights, torque, and equivalent circulation density.

The value of torque & drag modeling has been demonstrated widely throughout the industry - geoNEXT™ II adds further value to this by incorporating an automated process for recording drillstring weights while reciprocating, rotating or static.

Just as the driller normally runs through a procedure to record these weights, the context-awareness capability of geoNEXT™ II is able to do this automatically. The process is initiated by entering ideal conditions for recording these weights at a pipe connection: flow rates, hook-speed, pipe rotation and length and duration of the string movement are entered into a table. During pipe connections data continues to be acquired at very high frequency – the Pick-up/Slack-off application scans incoming data to find the weights which are most representative given the conditions set previously. In some cases, this can eliminate the need for the driller to follow a manual procedure, and all data are automatically stored in the powerful database for post processing studies.

In order to provide accurate information for performance monitoring, activities are automatically detected and the duration of each operation is logged and made available for time analysis. This allows one to assess the performance of the rig during the operation: rotary drilling, sliding, tripping, pipe connection, circulating and so on.

The activity detection is based upon specific logics defined according to the rig characteristics and applied for the entire duration of the well. Non Productive Time does not hinder the activity detection as this continues to be measured from the beginning to the end of the well. This feature is used to provide an automatic daily report including time analysis of the last 24 hours. Bit run, phase and well performance are derived from this powerful feature.

In order to provide our customer with the ‘best-in-class’ service, geoNEXT™ comes with a new feature called “RTDC”. With full remote duplication of the system and its advanced possibilities, our dedicated engineer can work more closely with our customer for optimum efficiency. He has direct access to the centralized Geoservices Expertise Center (G.E.C.) to support him during all drilling processes and can therefore delivery the best level of service to the drilling engineers in town.
Note: RTDC can be embedded within the customer’s proprietary IT infrastructure.

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