Evaluation of Explicit Coupling Between Reservoir Simulators and Production System

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
João Carlos von Hohendorff Filho ◽  
Denis José Schiozer
Keyword(s):  
Fluid Flow ◽  
Production System ◽  
Numerical Stability ◽  
Computational Models ◽  
Production Systems ◽  
Oil Industry ◽  
Operating Conditions ◽  
Complex Projects ◽  
Model Complex ◽  
Flow Through

In recent years, the oil industry has used various methodologies to solve numerical coupling of reservoirs and production systems to properly model complex projects needing an integrated solution of computational models that represent the fluid flow through the reservoir up to the surface. We present a study of explicit coupling methodology testing the production system on common operating conditions, verifying the benefits and quantifying limitations of explicit methodology, due to numerical stability errors reported in literature.

Control of Dielectric Fluid Flow Distribution in Micro-Tubes With EHD Conduction Pumping: Numerical Study

2011 ◽  
Author(s):  
Miad Yazdani ◽  
Jamal Seyed-Yagoobi
Keyword(s):  
Fluid Flow ◽  
Electric Field ◽  
Conduction Mechanism ◽  
Numerical Study ◽  
Fluid Motion ◽  
Flow Distribution ◽  
Operating Conditions ◽  
Dielectric Fluid ◽  
Total Flow ◽  
Flow Through

The control of fluid flow distribution in micro-scale tubes is numerically investigated. The flow distribution control is achieved via electric conduction mechanism. In electrohydrodynamic (EHD) conduction pumping, when an electric field is applied to a fluid, dissociation and recombination of electrolytic species produces heterocharge layers in the vicinity of electrodes. Attraction between electrodes and heterocharge layers induces a fluid motion and a net flow is generated if the electrodes are asymmetric. The numerical domain comprises a 2-D manifold attached to two bifurcated tubes with one of the tubes equipped with a bank of uniquely designed EHD-conduction electrodes. In the absence of electric field, the total flow supplied at the manifold’s inlet is equally distributed among the tubes. The EHD-conduction, however, operates as a mechanism to manipulate the flow distribution to allow the flow through one branch surpasses the counterpart of the other branch. Its performance is evaluated under various operating conditions.

Integrative surveillance of cattle welfare at the abattoir level: Risk factors associated with liver condemnation, severe hoof disorders, carcase bruising and high muscle pH

2021 ◽  
Vol 30 (4) ◽  
pp. 393-407
Author(s):  
N Losada-Espinosa ◽  
LX Estévez-Moreno ◽  
M Bautista-Fernández ◽  
H Losada ◽  
GA María ◽  
...  
Keyword(s):  
Risk Factors ◽  
Animal Welfare ◽  
Production System ◽  
Fasciola Hepatica ◽  
Production Systems ◽  
Operating Conditions ◽  
Vehicle Type ◽  
Muscle Ph ◽  
System Variables

Given the multi-dimensionality of animal welfare, any monitoring system for slaughter animals should comprise an integrative vision that facilitates animal welfare and food safety assessment. Thus, the aim of this study was to investigate risk factors as possible causes for liver condemnations, hoof disorders, bruise prevalence, and the quality of beef carcases under commercial operating conditions in Mexico. Data were recorded for 143 journeys encompassing 1,040 commercial cattle, originating from feedlots, free-range, and dairy production systems. Details on journey distance, vehicle type, cattle type, and animals' origin were gathered from abattoir reports. We found that carcase bruising (41%) and hoof disorders (43.9%) had the highest prevalence, regardless of the production system. Variables such as cattle type and production system influenced liver condemnations; old bulls extensively raised were more prone to present parasitosis such as Fasciola hepatica. Transportation conditions (journey distance, vehicle type) and cattle type might have influenced the development of hoof disorders in the evaluated animals. Multivariable logistic regression showed that animals' origin was a potential risk factor for severe bruising and high muscle pH, with cull dairy cows getting the most serious damage. In general, cattle transport conditions were factors that showed interactions with three of the evaluated indicators (severe hoof injuries, carcase bruising, meat pH24h). Our study shows the need to implement integrative surveillance to identify risk factors according to the production system from which the animals originate. With this information it is possible to develop strategies to mitigate specific cattle welfare problems.

Evaluation on Explicit Coupling Between Reservoir Simulators and Production System

2012 ◽  
Author(s):  
João Carlos von Hohendorff Filho ◽  
Denis José Schiozer
Keyword(s):  
Production System ◽  
Production Systems ◽  
Operating Conditions ◽  
Production Forecast ◽  
Group Management ◽  
Reservoir Simulator ◽  
Implicit And Explicit ◽  
Operating Constraints ◽  
Management Alternatives

Various methodologies to model the coupling of reservoirs and production systems have been applied in the oil industry in recent years due to the need to model properly the integrated solution of models that represent the flow of fluids through the reservoir to the surface. These methodologies are used to solve the production forecast of multiple reservoirs, sharing production platforms with limited production e injection capacities ruled by complex production systems. They can be grouped into two basic types: implicit and explicit coupling methodologies. Explicit methodology can be an efficient choice to integrate simulations because allows coupling adequate simulators to model the whole system and also to grant flexibility in study of well management alternatives. However, it is necessary to test this type of procedure to check the quality of the results. Therefore, a validation study of explicit coupling methodology is presented in this work where the production system is tested on common operating conditions during production and injection of fluids, verifying benefits and limitations of explicit methodology. Some methods for improving the explicit response are proposed and evaluated. An example of application verifies the gain of flexibility in well prioritization by the group management obtained by use of an external methodology for reservoir simulator. The explicit coupling, as implemented, has shown a satisfactory result for the integration between the simulators, honoring all operating constraints set in evaluation cases. Some correction methodologies are necessaries to obtain stabilized results.

scholarly journals Decision making by using a computer algorithm to analyze hydrocarbon production systems

2016 ◽  
pp. 75-83
Author(s):  
Robinson Stevens Salazar-Rúa ◽  
Johan Darío Caicedo-Reyes ◽  
Jovani Alberto Jiménez-Builes
Keyword(s):  
Pressure Drop ◽  
Production System ◽  
Production Systems ◽  
Initial Pressure ◽  
Production Costs ◽  
Hydrocarbon Production ◽  
Nodal Analysis ◽  
Pressure Drops ◽  
Flow Through ◽  
Oil Company

This paper shows an algorithm that allows to automate the procedures of nodal analysis and flow optimization in a hydrocarbon production system. The procedure of nodal analysis is highly useful in flow wells, intermittent wells or in wells with artificial production systems. The nodal analysis evaluates a production system divided into two basic components: flow through vertical piping or production piping, and flow through horizontal piping or discharge line. For the prediction of each component's behavior, the pressure drop in each component is obtained. In order to obtain the pressure drops, nodes in different important points within the production system must be assigned; therefore, production expenses can vary and, by using a suitable calculation method, the pressure drop between two nodes is calculated. Then, a node is selected and the pressure drops are added to or subtracted from the initial pressure point or departure node, until obtaining the solution node. The results obtained when using the algorithm have allowed to update both procedures, obtaining advantages such as improvement in response time, among others. This analysis is a crucial point when making decisions related to production costs in any oil company.

Comparison of Different Numerical Approaches for Determination of Compressible Fluid Flow in Narrow Gaps

2016 ◽  
Author(s):  
Alexander Kefalas ◽  
Friedrich-Karl Benra ◽  
Dieter Brillert ◽  
Hans Josef Dohmen
Keyword(s):  
Fluid Flow ◽  
Complex Geometry ◽  
Operating Conditions ◽  
Present Contribution ◽  
Dry Gas Seal ◽  
Thin Fluid Film ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
Viscous Flow Field ◽  
Numerical Approaches

The prediction of fluid flow through a narrow gap is a characteristic problem in fluid mechanics. In today’s turbomachinery, several applications in bearing and sealing technology are based on the phenomena of two surfaces being separated by a thin fluid film of only a few micrometers. The common method for analyzing the non-contact application’s performance usually applies the lubrication theory based on the Reynolds equation. This two-dimensional model is based on the assumption of a laminar viscous flow field, isothermal conditions and it takes aerostatic as well as aerodynamic effects into account. In cases of a complex geometry and challenging flow conditions this approach has its limitations. The usage of commercial state of the art computational fluid dynamics (CFD) software allows the circumvention of these restrictions. As a matter of fact CFD simulations take up high effort in terms of preparation and calculation time. The present contribution compares the numerical approaches with regard to the application’s performance accuracy and calculation effort, using the example of a dry gas seal. To extend the Reynolds equation’s applicability to a wide variety of geometries, a method for implementing the topography design with high fidelity is depicted. The numerical methods are performed for various dry gas seal designs at different operating conditions and are compared with reference data.

scholarly journals Microfluidic Microchannel (Size And Shape) for Single Cell Analysis by Numerical Optimization: Lateral Trapping Method

2019 ◽  
Vol 9 (1S4) ◽  
pp. 747-752
Keyword(s):  
Fluid Flow ◽  
Single Cell ◽  
Computational Models ◽  
Single Cell Analysis ◽  
Operating Conditions ◽  
Comsol Multiphysics ◽  
Cell Analysis ◽  
Size And Shape ◽  
Biomedical Equipment ◽  
Finite Element Analysis Simulation

The primary objective of this work is to show simulation outputs from the developed model of cell flow within a microfluidic device. This work is essential because it requires computational models to offer compact sized biomedical equipment that involves microfluidics technology. Microfluidics has become a common technology for life science applications in latest years. The purpose is to learn the effect of various microchannel size and shape with lateral traps for single cell analysis and to arrive at an optimum design based on a simulation study using COMSOL Multiphysics software. Thus in order to develop software model of various microchannels which execute fluid flow in the microelectronic device. This research provides numerical alternatives from finite element analysis simulation using the software COMSOL-Multiphysics to characterize the shape and size of the microchannel initializing the fluid flow. Optimized design analysis and operating conditions for efficient single cell trap is reported.

STABILITY OF COUPLE STRESS FLUID FLOW THROUGH A HORIZONTAL POROUS LAYER

2016 ◽  
Vol 19 (5) ◽  
pp. 391-404 ◽  
Author(s):  
B. M. Shankar ◽  
I. S. Shivakumara ◽  
Chiu-On Ng
Keyword(s):  
Fluid Flow ◽  
Porous Layer ◽  
Couple Stress ◽  
Couple Stress Fluid ◽  
Flow Through
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