Effect of the Concentration of Viscosifier on Desorption Kinetics of Methane From Synthetic Based Fluids

2020 ◽  
Author(s):  
Damilola Ojedeji ◽  
Yuanhang Chen
Keyword(s):  
Mass Transfer ◽  
Liquid Phase ◽  
Drilling Fluid ◽  
Desorption Kinetics ◽  
Drilling Mud ◽  
Well Control ◽  
Kinetics Of Formation ◽  
Control Decision ◽  
Internal Olefin ◽  
Kinetics Of

Abstract Synthetic-oil based drilling mud is currently the most commonly used type of drilling fluid for offshore drilling in the Gulf of Mexico, due to the environmental regulation in the area, as well as the numerous operational benefits they provide. However, early kick detection and well control decision-making are more challenging due to the solubility of formation gas in synthetic-based fluids. This partially contributes to the poor understanding of the mass transfer kinetics of formation gas in and out of synthetic fluids during these well control events. The objective of this work was to better understand the mass transfer of gas from a solution by evaluating the influence of viscosifier concentration on the desorption kinetics of methane from pure internal olefin and internal olefin-viscosifier mixture. The desorption coefficients were determined from a custom-built mass transfer apparatus. Different suspentone concentrations ranging from 0 to 5wt% by volume of liquid were used to investigate the influence of viscosifier concentration on the desorption coefficient. It was observed that the presence of suspension agents in the liquid phase decreased the mass transfer coefficient. This decrease could be due to an increase in the resistance to the flow of gas bubbles evolving from the liquid phase.

Effects of Pressure on the Kinetics of Manganese Evaporation from the Ot4 Alloy / Wpływ Cisnienia Na Kinetyke Procesu Odparowania Manganu Ze Stopu Ot4

2013 ◽  
Vol 58 (1) ◽  
pp. 197-201 ◽  
Author(s):  
L. Blacha ◽  
R. Burdzik ◽  
A. Smalcerz ◽  
T. Matuła
Keyword(s):  
Mass Transfer ◽  
Liquid Phase ◽  
Gaseous Phase ◽  
Pressure Range ◽  
Evaporation Rate ◽  
Evaporation Process ◽  
Pressure Reduction ◽  
Diffusion Controlled ◽  
Kinetics Of ◽  
Evaporation Kinetics

In the paper, results of the study on manganese evaporation from the OT4 alloy are presented. In the experiments, the effects of pressure on the manganese evaporation kinetics and the stages that limit the evaporation rate were investigated. It was demonstrated that the rate of manganese evaporation from the alloy increased with pressure reduction in the system. When the pressure decreases from 1000 Pa to 10 Pa, the value of overall mass transfer kMn increases from 3.9*10-6 ms-1 to 208.4*10-6 ms-1. At the same time, the manganese fraction in the alloy decreased from 1.49% mass to 0.045% mass. Within the whole pressure range, the analysed evaporation process is diffusion-controlled. For pressures above 50 Pa, the determining stage is transfer in the gaseous phase, while for pressures below 50 Pa, it is transfer in the liquid phase.

Evaluation of Ultrasonic Methods for In-Situ Real-Time Characterization of Drilling Mud

2005 ◽  
Author(s):  
Judith Ann Bamberger ◽  
Margaret S. Greenwood
Keyword(s):  
Physical Properties ◽  
Real Time ◽  
Speed Of Sound ◽  
Direct Contact ◽  
Drilling Fluid ◽  
Drilling Process ◽  
Drilling Mud ◽  
Well Control

A real time multi-functional ultrasonic sensor system is proposed to provide automated drilling fluid monitoring that can improve the capability and development of slimhole and microhole drilling. This type of reliable, accurate, and affordable drilling fluid monitoring will reduce the overall costs in exploration and production. It will also allow more effective drilling process automation while providing rig personnel a safer and more efficient work environment. Accurate and timely measurements of drilling fluid properties such as flow rate, density, viscosity, and solid loading are key components for characterizing rate of drill penetration, providing early warning of lost circulation, and for use in real-time well control. Continuous drilling fluid monitoring enhances drilling economics by reducing the risk of costly drilling downtime, increasing production performance, and improving well control. Investigations conducted to characterize physical properties of drilling mud indicate that ultrasound can be used to provide real-time, in-situ process monitoring and control. Three types of ultrasonic measurements were evaluated which include analysis of in wall, through wall and direct contact signals. In wall measurements provide acoustic impedance (the slurry density and speed of sound product). Through wall and direct contact measurements provide speed of sound and attenuation. This information is combined to determine physical properties such as slurry density, solids concentration and can be used to detect particle size changes and the presence of low levels of gas. The measurements showed that for the frequency range investigated in-wall measurements were obtained over the slurry density range from 1500 to 2200 kg/m3 (10 to 17 pounds solids per gallon of drilling fluid). Other measurements were obtained at densities in the 1500 to 1800 kg/m3 range. These promising measurement results show that ultrasound can be used for real-time in-situ characterization of the drilling process by monitoring drilling mud characteristics.

Determination of the sorption and desorption kinetics of perfume raw materials in the liquid phase with vesicular dispersion: Application of SIFT-MS

2013 ◽  
Vol 217 ◽  
pp. 281-288 ◽  
Author(s):  
Philippe M. Heynderickx ◽  
Sébastien De Clercq ◽  
Pieter Saveyn ◽  
Jo Dewulf ◽  
Herman Van Langenhove
Keyword(s):  
Liquid Phase ◽  
Raw Materials ◽  
Desorption Kinetics ◽  
Kinetics Of
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