Adaptation of Capillary String for the Surfactants Delivery into a Gas Condensate Well and Optimization of its Operation Using Dynamic Multiphase Flow Simulator

2021 ◽  
Author(s):  
Daniil Yurievich Solovev ◽  
Anton Sergeevich Epryntsev ◽  
Petr Ilich Eliseev ◽  
Andrey Gennadievich Yamov ◽  
Yamov Grigorievich Nerodenko ◽  
...  
Keyword(s):  
Water Flow Rate ◽  
Gas Condensate ◽  
Injection System ◽  
Stable Operation ◽  
Analysis Tool ◽  
Liquid Loading ◽  
Foaming Agent ◽  
Horizontal Wellbore ◽  
Liquid Removal ◽  
Flow Simulator

Abstract The studied productive formation of gas condensate field is at the stage of declining production. The inflow of bottom water due to the rise of the GWC and the design features of horizontal wells (large tubing and liner diameters) create the prerequisites for the development of a liquid loading of wells. This necessitate the optimization of the existing method of liquid unloading by dosing surfactants into the annulus. In order to increase the efficiency of well treatment with a foaming agent, the use of a surfactant injection system through a capillary string suspended inside a tubing is considered. The use of this system allows to increase the speed and depth of surfactant delivery, use the potential of the well by simultaneous work in tubing and annulus during significant watering period (water flow rate: 50 and more m3 / day), reduce reagent losses associated with retention on the casing walls, and reduce the required consumption of surfactant. The capillary string for the pumping surfactant is applicated to ensuring the stable operation of gas condensate wells during liquid loading. But today there are not ready-made applied solutions for correctly accounting surfactant action in unsteady flows conditions in the well. The paper presents the substantiation and analysis of the capillary string introduction into the well for the pumping surfactant using specialized software. In the course of work, the main analysis tool is the dynamic modeling of multiphase flows in the conditions of steady and unsteady processes in wells. This approach use is aimed at determining the optimal depth and diameter of capillary, the required consumption and concentration of surfactant, the rate of its delivery to the bottomhole, and the liquid removal efficiency from the horizontal wellbore.

WELL TESTING HORIZONTALGAS-CONDENSATE WELLS

2017 ◽  
pp. 56-61
Author(s):  
M. L. Karnaukhov ◽  
O. N. Pavelyeva
Keyword(s):  
Comparative Analysis ◽  
Skin Effect ◽  
Horizontal Wells ◽  
Gas Condensate ◽  
Low Permeability ◽  
Well Testing ◽  
Flow Capacity ◽  
Formation Zone ◽  
Horizontal Wellbore

The well testing of gas-condensate horizontal wells are discussed in the article and the comparative analysis of borehole flow capacity, depending on the mode of it’s operation is presented. Extra attention is focused on the issue of timely identification of the reasons for the reduction of fluid withdrawal from the reservoir. The presence of high skin effect is proved, which confirms the existence of low-permeability of bottomhole formation zone related to condensation in the immediate area of the horizontal wellbore.

ASSESSMENT OF MULTALL AS CFD CODE FOR THE ANALYSIS OF TUBE-AXIAL FANS

2021 ◽  
pp. 1-12
Author(s):  
Piero Danieli ◽  
Massimo Masi ◽  
Giovanni Delibra ◽  
Alessandro Corsini ◽  
Andrea Lazzaretto
Keyword(s):  
Experimental Data ◽  
Steady State ◽  
Velocity Distribution ◽  
High Speed ◽  
State Of The Art ◽  
Stable Operation ◽  
Pressure Curve ◽  
Analysis Tool ◽  
Low Speed ◽  
Axial Fans

Abstract This work deals with the application of the open source CFD code MULTALL to the analysis of tube-axial-fans. The code has been widely validated in the literature for high-speed turbomachine flows but not applied yet to low speed tutbomachines. The aim of this work is to assess the degree of reliability of MULTALL as a tool for simulating the internal flow in industrial axial-flow fan rotors. To this end, the predictions of the steady-state air flow field in the annular sector of a 315 mm tube-axial fan obtained by MULTALL 18.3 are compared with those obtained by two state-of-the-art CFD codes and experimental data of the global aerodynamic performance of the fan and the pitch-wise averaged velocity distribution downstream of the rotor. All the steady-state RANS calculations were performed on either fully structured hexahedron or hexa-dominant grids using classical formulations of algebraic turbulence models. The pressure curve and the trend of the aeraulic efficiency in the stable operation range of the fan predicted by MULTALL show very good agreement with both the experimental data and the other CFD results. Although the estimation of the fan efficiency predicted by MULTALL can be noticeably improved by the more sophisticated state-of-the-art CFD codes, the analysis of the velocity distribution at the rotor exit supports the use of MULTALL as a reliable CFD analysis tool for designers of low-speed axial fans.

Phase Re-Distribution and Heat Transfer in Gas/Condensate Flow Shut-In in a Deepwater Lazy-Wave Riser

2002 ◽  
Author(s):  
Y. Doreen Chin ◽  
K. Krishnathasan ◽  
I. Roberts
Keyword(s):  
Heat Transfer ◽  
Multiphase Flow ◽  
Pressure Effect ◽  
Internal Heat ◽  
Transient Behavior ◽  
Gas Condensate ◽  
Liquid Loading ◽  
Interfacial Mass Transfer ◽  
Key Factor ◽  
Internal Heat Transfer

The mechanisms of phase re-distribution of gas/condensate flow in a deepwater steel lazy-wave riser after system shutdown have been studied numerically. The investigated system consists of a 15-mile long subsea pipeline tieback to a floating vessel, via a 9,800-ft long lazy-wave production riser. The subsea well is located at 6,350 ft of water. The system is insulated, and transports a gas-condensate mixture with liquid loading of 10 stb/mmscfd. This study reveals that besides pressure, the internal heat transfer during system cool-down is a key factor for the phase re-distribution between gas and liquid, and along the system. The liquid holdup variations are caused by the interfacial mass transfer between gas-liquid interface and phase re-distribution due to the combined effects of gravitational and buoyancy forces. Fluid cool down temperature “overshoot” in the lazy wave riser valley during system cool down has been observed. The pressure effect on the cool down temperature overshoot has been studied. The phenomenon is discussed based on fundamental heat transfer, phase equilibrium, and multiphase flow principles. The lazy wave riser configuration is a promising option for deepwater development, and gas/condensate flow is a multiphase flow phenomenon commonly encountered in raw gas transportation. The results of this study improve the understanding of multiphase flow transient behavior in deepwater pipeline/riser systems, and benefits gas/condensate production system design.

Production Optimization of Liquid Loading Problem in Offshore Niger Delta Gas Condensate Field

2019 ◽  
Author(s):  
Mohammed Bashir Abdullahi ◽  
A. D. I Sulaiman ◽  
Usman Abdulkadir ◽  
Ibraheem Salaudeen ◽  
Bashir Umar Shehu
Keyword(s):  
Niger Delta ◽  
Production Optimization ◽  
Gas Condensate ◽  
Liquid Loading ◽  
Loading Problem

Improving Production Efficiency of Liquid-Loading Gas Condensate wells with ESPs at North Urengoy Field

2017 ◽  
Author(s):  
Anton Epryntsev ◽  
Farid Minikaev ◽  
Alexey Sullagaev ◽  
Alexey Yazkov ◽  
Benik Khachaturyan ◽  
...  
Keyword(s):  
Production Efficiency ◽  
Gas Condensate ◽  
Liquid Loading

scholarly journals Study of a Fuel Supply Pump with a Piezoelectric Effect for Microdirect Alcohol Fuel Cells

2011 ◽  
Vol 2011 ◽  
pp. 1-7
Author(s):  
Hsiao-Kang Ma ◽  
Jyun-Sheng Wang ◽  
Wei-Yang Cheng ◽  
Shin-Han Huang
Keyword(s):  
Fuel Cells ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Injection System ◽  
The Novel ◽  
Ethanol Injection ◽  
Piezoelectric Device ◽  
Pump Chamber ◽  
Chamber Volume ◽  
Alcohol Fuel

A novel design for an ethanol injection system has been proposed, which consists of one pump chamber, two valves, and one central-vibrating piezoelectric device. The system uses a microdiaphragm pump with a piezoelectric device for microdirect alcohol fuel cells. The diameters of the pump chamber are 31 mm and 23 mm, and the depths of the chamber are 1 mm and 2 mm. When the piezoelectric device actuates for changing pump chamber volume, the valves will be opened/closed, and the ethanol will be delivered into DAFC system due to the pressure variation. The chamber dimensions, vibrating frequencies of the piezoelectric device, and valve thickness are used as important parameters for the performance of the novel ethanol injection system. The experimental results show that the ethanol flow rate can reach 170 mL/min at a vibrating frequency of 75 Hz. In addition, the ethanol flow rate is higher than the water flow rate.

Simulation and analysis of an aero-engine combustor with a slinger fuel injection system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ariel Y. Cohen ◽  
Artemii Sattarov ◽  
Kilian Claramunt ◽  
Jan E. Anker ◽  
Luigi Romagnosi ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Injection System ◽  
Pollutant Emission ◽  
Fuel Spray ◽  
Stable Operation ◽  
Liquid Spray ◽  
Aero Engine ◽  
Modelling Strategies ◽  
Momentum Coupling ◽  
Physical Phenomena

Abstract The use of Computational Fluid Dynamics (CFD) is now central to the design process of aero-engine combustors, enabling optimal, safe and stable operation, increased efficiencies, and the reduction of pollutant emission. To benefit maximally from the use of CFD it is essential to account for the relevant physical phenomena, in particular the fuel spray breakup and its evaporation. Different strategies for modelling the injection of fuel spray are applied - in the simplest approach the fuel is assumed to be gaseous upon injection, in the most advanced approach the fuel is modelled, using a Lagrangian-Eulerian approach, as a liquid spray which breaks up, evaporates and eventually burns inside the combustion chamber. The effects of the various modelling strategies on the flow, temperature, and compositional fields are investigated. The radial distribution of the simulated temperature field is compared to experimental data, demonstrating that acceptable accuracy is only achieved when the fuel is modelled as a liquid spray and a two-way momentum coupling between the spray and the gas-phase is accounted for.

Simulation and analysis of an aero-engine combustor with a slinger fuel injection system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ariel Y. Cohen ◽  
Artemii Sattarov ◽  
Kilian Claramunt ◽  
Jan E. Anker ◽  
Luigi Romagnosi ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Injection System ◽  
Pollutant Emission ◽  
Fuel Spray ◽  
Stable Operation ◽  
Liquid Spray ◽  
Aero Engine ◽  
Modelling Strategies ◽  
Momentum Coupling ◽  
Physical Phenomena

Abstract The use of Computational Fluid Dynamics (CFD) is now central to the design process of aero-engine combustors, enabling optimal, safe and stable operation, increased efficiencies, and the reduction of pollutant emission. To benefit maximally from the use of CFD it is essential to account for the relevant physical phenomena, in particular the fuel spray breakup and its evaporation. Different strategies for modelling the injection of fuel spray are applied - in the simplest approach the fuel is assumed to be gaseous upon injection, in the most advanced approach the fuel is modelled, using a Lagrangian-Eulerian approach, as a liquid spray which breaks up, evaporates and eventually burns inside the combustion chamber. The effects of the various modelling strategies on the flow, temperature, and compositional fields are investigated. The radial distribution of the simulated temperature field is compared to experimental data, demonstrating that acceptable accuracy is only achieved when the fuel is modelled as a liquid spray and a two-way momentum coupling between the spray and the gas-phase is accounted for.

scholarly journals EVALUATION OF AKPET GT9 GAS CONDENSATE RESERVOIR PERFORMANCE

2020 ◽  
Vol 1 (1) ◽  
pp. 1-13
Author(s):  
S. Okotie ◽  
N. O. Ogbarode
Keyword(s):  
Reservoir Characterization ◽  
Material Balance ◽  
Gas Condensate ◽  
Petroleum Engineering ◽  
Analysis Tool ◽  
Reservoir Performance ◽  
Future Production ◽  
Condensate Reservoir ◽  
Balance Analysis ◽  
Amount Of Knowledge

To effectively evaluate a gas condensate reservoir performance, the reservoir engineer must have a reasonable amount of knowledge about the reservoir to adequately analyze the reservoir performance and predict future production under various modes of operation. Due to the multiphase flow that exists in the reservoir, characterization of gas condensate reservoirs is often a difficult task with the variation of its overall composition in both space and time during production which complicates well deliverability analysis and the sizing of surface facilities. This study is primarily concern with the evaluation of a gas condensate reservoir performance of Akpet GT 9 Reservoir in the Niger Delta region of Nigeria with material balance analysis tool “MBal” without having to run numerical simulations. The result obtained with MBal on the analysis of Akpet GT 9 reservoir gave 23.934 Bscf of gas initially in place which compares favorably with the volume obtained from volumetric techniques. Results also shows that the most likely aquifer model is the Hurst–Van Everdingen - Dake radial aquifer and the reservoir is supported by a combined drive of water influx and fluid expansion. Okotie, S. | Department of Petroleum Engineering, Federal University of Petroleum Resources (FUPRE), Effurun, Delta State, Nigeria.

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