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KPI Reports: A daily look at critical statistics to help your business objectives

PDF: Published on Pason, April 24, 2020

Automated KPI Reports – Daily Reports

Pason’s Daily KPI Reports provide critical statistics and valuable insights into the previous day’s operations. These KPI reports are generated using sensor data, and can be retrieved from the DataHub, Pason Live mobile app, or auto-generated daily email.

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Weight on Bit, Differential Pressure and the algorithm that improves the quality of your data

SPE PAPER: Published on One Petro, April 2, 2020

An Algorithm to Automatically Zero Weight on Bit and Differential Pressure and Resulting Improvements in Data Quality

Weight on bit (WOB) and differential pressure (DIFP) are two essential parameters derived from surface sensors during the drilling process. However, there can be significant errors in these measurements due to improper zeroing of these traces. Regular zeroing of WOB is important to ensure that it is calibrated for additional stands that have been added to the drillstring. Similarly, regular zeroing of DIFP is important to ensure that added hydrostatic pressure, which increases with depth, is taken into account, and to ensure that DIFP has been calibrated to the correct pump rate. In this paper, we quantify the errors due to forgotten and incorrect zeroing, and discuss an algorithm that was developed to automatically zero WOB and DIFP to eliminate these errors.

This study has two main sections. In the first section, the current practice of zeroing WOB (prior to rotary drilling) is analyzed in 40 onshore wells. It is found for 86% of all stands that WOB is either zeroed incorrectly or not at all. An algorithm is developed to determine the appropriate time to perform the zero WOB operation. Using this algorithm, it is found that the average WOB error per stand due to improper zeroing is 16.8 and 17.6% in the vertical and lateral wellbore sections, respectively. Further, it was found that repeated forgotten zeroes could result in large errors, particularly in the vertical where 8% of stands have WOB inaccuracies of more than 30%. In the second section, the analysis is repeated for DIFP and it is found that zeroing DIFP is forgotten in 51% of all stands, resulting in errors of 17.5 and 8.9% in the vertical and lateral, respectively. In the vertical, 9.9% of stands have DIFP inaccuracies of more than 30% due to forgotten zeroing. Applying these algorithms to historic data can eliminate these errors, and improve the effectiveness of data-based drilling optimization and analytics. Further, these algorithms could be implemented in an electronic drilling recorder (EDR) to improve the quality of real-time data at the rig.

Credits

Adam C. Neufeldt (Pason Systems)
Stephen W. Lai (Pason Systems)
Sean D. Kristjansson (Pason Systems)

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Pason Live Mobile: Explore convenience and security with the latest Q1 2020 Release

PDF: Published on Pason, March 3, 2020

Pason Live Mobile Q1 2020 Release

The newest update to Pason Live Mobile delivers exciting features and a more intuitive experience. Retrieve and view reports directly in the app and stay up to date on current rig operations in real-time. Download Pason Live on your Apple or Android device today—simply visit the Apple Store or Google Play.

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Drilling Data

Rig State Traces (EDR 19.4 and higher)

PDF: Published on Pason, April 15, 2019

The EDR includes two traces you can use to determine the rig's state at a specific time or depth: Rig Super State and Rig Sub State. The super state describes activity at a high level, while the sub state provides more detail.

These traces are available on the EDR, DataHub, and Pason Live in full 1-second frequency.

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Drilling by the Numbers Demands Better Numbers

ARTICLE: Published on Journal of Petroleum Technology, May 1, 2018

The weight of the drillstring connected to the topdrive (yellow machine) is a key measure used to calculate the weight on the bit, and the focus of arguments about how to accurately measure drilling.

Oil wells can produce large volumes of oil, gas, water, and dubious data. For example, a recent study of data from 40 wells found that the measure of the weight on the bit (WOB) was off by 18% in the average well.

The big problem was that 69% of the time this key measure of the force applied while drilling was not recalibrated when the weight of the drillstring was increased as pipe was added, which is known as WOB zeroing.

Past technical papers on data quality focused on how data were measured, not on whether drillers were regularly zeroing, said Adam Neufeldt, a research engineer at Pason.

Credits

Stephen Rassenfoss, JPT Emerging Technology Senior Editor

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