Transducer Standpipe Pressure Compared to Multivariable Regression Models: Case Studies of Four Middle East Wells


Efforts should be exerted to develop explicit formulas for the calculation of the standpipe pressure values as this is important for the drilling crew to previously know the appropriate window of the downhole pressure while drilling the problematic intervals such as fractured formations, unconsolidated and pressure-depleted zones, over pressured zones, etc. Knowing the pressure window before drilling gives the capability to take appropriate measures prior to, while, and after penetrating these zones, thus, preventing from the different expected and unexpected drilling incidents. Standpipe pressure remains among the parameters that affect the safe and successful process of the drilling activity. In this study, the rate of penetration, weight on bit, revolutions per minute, torque, dog leg, mud rheology and well hydraulics have all been considered during the development of the different presented models. The obtained results from the developed models were compared with the real values of the standpipe pressure obtained from the pressure transducers. This paper aims to analyze the comparison between the standpipe pressure values obtained from the pressure transducers and those from multiple regression models developed using a combination of the drilling parameters and frictional pressure drops using the Herschel-Bulkley rheological model. Nondimensionalization and multivariable regression techniques were also used to reduce the number of the required input parameters and to conclude that the dimensionless pressure can be a function of the dimensionless revolution per minute and the dimensionless torque. The effect of the dog leg was found so insignificant that it could be neglected without necessarily impacting or compromising the accuracies of the developed models. Data of four wells from the Middle East were used to compare the pressure transducer values with those of the regression models using PTC Mathcad Prime 4.0. The regression models proved accurate enough to estimate the standpipe pressure as shown in Fig. 3.1.

Recent Publications (minimum 5)

1. Seydou Sinde (2020) Foam Rheological Properties Versus Geothermal Gradient in Vertical Well Drilling. 20IPTC-(20073).

2. Seydou Sinde (2019) A Simulating Study for Back Pressure Impacts on Selected Foam Rheological Properties in Vertical Wells. International Journal of Engineering Sciences 2019 12(3) 79-91. https://doi.org10.36224/ijes.120302.

3. Seydou Sinde, Eissa Shokir, and Abdel Sattar Dahab( 2019) Development of a Simplified Foam Hydraulic Model for Vertical Well Drilling. Petroleum & Petrochemical Engineering Journal. ISSN: 2578-4846. DOI:

4. Seydou Sinde (2019) Effects of ROP on Selected Foam Rheological Properties in Vertical Wells. Petroleum and Chemical Industry International Journal. ISSN: 2639-7536. DOI:

5. Seydou Sinde, Khaled A F Ahmed, Abdel S A Dahab (2012) Potential Implementation of Casing while Drilling Technique in the Western Desert Fields of Egypt, SPE-149835-MS, DOI:

6. Seydou Sinde (2018) Effects of Injection Parameters on Foam Rheology in Vertical Wells. SPE-192163-MS. DOI:

7. Seydou Sinde (2019) Analysis of Back Pressure Effect on Selected Foam Rheological Properties in Vertical Wells. AME05. (ASRES) & SPJ Centre for Multi-disciplinary Research.


Seydou Sinde is an assistant professor at the school of Science, Technology, Engineering and Mathematics (STEM), International University of Grand-Bassam (IUGB), Côte d’Ivoire. He has occupied several professional positions in the oil and gas industry. He has ten years of experience in the petroleum industry as a field engineer from 2006 to 2016 (Sample Catcher, Mud Logger, Data Engineer, Pressure Engineer, Operations Supervisor in Petroservices-GmbH Egypt-Branch and Operations Coordinator for the directional drilling in LLL Company). He has also occupied the position of Training Instructor and Training Chief Instructor in Petroservices-GmbH; Egypt Branch (2012-2016). His research interests include petroleum and drilling engineering. Dr. Sinde has authored and coauthored several journal and conference papers. He holds a PhD (2016) and a Master of Science (2009) in petroleum engineering from Cairo University, and a Bachelor of Science (2006) in petroleum engineering from Al-Azhar University, Egypt.

Posted by: Seydou Sinde, Assistant Professor at the School of STEM, IUGB, International University of Grand-Bassam, Cote D`Ivoire (24-Sep-2023)