Application of Multizone Water Injection Downhole Flow Control Completions with Fibre-Optic Surveillance in Soft Sand Reservoirs

2019 ◽  
Author(s):  
Dzu Nguyen ◽  
Innis Macleod ◽  
Donald Taylor ◽  
Laurence Murray ◽  
Denis Zavyalov ◽  
...  
Keyword(s):  
Flow Control ◽  
Water Injection ◽  
Fibre Optic

Flow Control Strategy for Novel Layered Synchronous Water Injection Technology in Oilfield

2012 ◽  
Vol 5 (2) ◽  
pp. 696-700
Author(s):  
Jia Deli ◽  
Wang Fengshan ◽  
Zhao Mingxin ◽  
Xu Dekui ◽  
Ma Qiang
Keyword(s):  
Flow Control ◽  
Control Strategy ◽  
Water Injection ◽  
Injection Technology

Improvements of Flow Control With Fluid Injection for the Suppression of Flow Instabilities in Pump-Turbines

2021 ◽  
Author(s):  
Sabri Deniz ◽  
Fabio Asaro
Keyword(s):  
Flow Control ◽  
Flow Injection ◽  
Water Injection ◽  
Operating Mode ◽  
Flow Instabilities ◽  
Fluid Injection ◽  
Cfd Simulations ◽  
Pump Turbine ◽  
Flow Features ◽  
Load Conditions

Abstract A stable and reliable pump-turbine operation under continuously expanding operating range requirement often imposes challenges on the hydraulic design of the pump-turbines and requires new developments. During a previous study carried out at the HSLU (Lucerne University of Applied Sciences, Switzerland), the flow instabilities of a low specific speed (i.e., nq = 25) pump-turbine were analyzed while a CFD methodology was developed through taking different numerical approaches and applying several turbulence models. The goal was to predict the turbine-mode characteristics of the reversible pump-turbines in the S-shaped region (at speed no load conditions) accurately as well as analyzing the flow features especially at off-design conditions. This CFD model was validated against the experimental data at different guide vane openings in turbine operating mode. Based on the analysis of the experimental data, flow visualization, and CFD results focusing especially on the flow features in the vaneless space and at the runner inlet, the onset and development of the flow instabilities were explored. Furthermore, a flow control technology that entailed injecting air and water in the vaneless space of a model pump-turbine was implemented for suppressing the flow instabilities and thus extending the operating range of the pump-turbine. Both air- and water-injection were applied by using an external energy source (compressor and pump) and discrete nozzles that are distributed in the vaneless space circumferentially. The S-shaped pump-turbine characteristics in turbine operating mode were modified so that the slope at speed no load conditions was no more positive indicating an improvement in the stability behavior. The analysis of the unsteady pressure data indicates the suppression of flow instability such as rotating stall with fluid injection in the vaneless space. The positive effect of fluid injection on the pump-turbine characteristics was also demonstrated in the CFD calculations. CFD was able to predict the pump-turbine dimensionless discharge, Kcm1, - speed, Ku1, characteristic curve with water injection correctly. After the CFD tool is validated for the prediction of the pump-turbine characteristics with fluid injection, further CFD simulations were carried out in order to improve the effectiveness of flow control and if possible, using less amount of injected fluid in the vaneless space. The goal was to optimize the fluid injection so that the instabilities can be suppressed with the lowest possible water/energy consumption. Parameters such as number of injection nozzles, nozzle position, nozzle diameter, and injection direction are varied. Several configurations of water injection system i.e., changing the number, location, and distribution of injection nozzles circumferentially and radially, direction of flow injection with respect to the main flow in the vaneless space, symmetrical and asymmetrical circumferential distribution of the nozzles in the vaneless space were analyzed using the CFD simulations. In addition to the flow injection in the vaneless space from the hub wall, fluid injection through the guide vanes was also investigated. The results of the fluid injection modifications were compared with the results of the baseline flow injection case. Using a parameter study, optimal nozzle configurations were found, that resulted in stable pump-turbine behavior in turbine operating mode with fewer injection nozzles and lower injected flow rate in comparison to the baseline case.

Downhole Flow Control for High Rate Water Injection Applications

2010 ◽  
Author(s):  
Brock Williams ◽  
Mark F. Barrilleaux
Keyword(s):  
Flow Control ◽  
Water Injection ◽  
High Rate

Study on PIDNN-Based Flow Control in Layered Water Injection Technology in Oilfield

2011 ◽  
Vol 291-294 ◽  
pp. 2718-2722 ◽  
Author(s):  
De Li Jia ◽  
Feng Shan Wang ◽  
De Kui Xu
Keyword(s):  
Flow Control ◽  
Water Injection ◽  
Complex Model ◽  
Strong Nonlinearity ◽  
Discrete Events ◽  
Production Engineering ◽  
Performance Indexes ◽  
Simulation And Experiment ◽  
Injection Technology ◽  
Controlled Object

This paper takes the layered water injection technology in oil production engineering as research object. This technology is characterized by strong nonlinearity, strong interlayer interference, time variation and complex model. Focusing on these characteristics, this paper proposes a novel control strategy based on PID-NN algorithm to satisfy the requirements of layered water injection technology. Many performance indexes of the controller are optimized, including model establishment of nonlinear controlled object, multi-parameter decoupling, controller acceleration and precision improvement. The simulation and experiment show that compared with traditional controller based on PID and controller based on BP neural network, the optimized controller has stronger robustness, faster response and better flow control, so it has an advantage over traditional controllers of dealing with discrete events and multi-variable decoupling problems.

Flow Control Strategy for Novel Layered Synchronous Water Injection Technology in Oilfield

2012 ◽  
Vol 424-425 ◽  
pp. 737-741
Author(s):  
De Li Jia ◽  
Feng Shan Wang ◽  
Shu Jin Zhang ◽  
Ming Xin Zhao
Keyword(s):  
Fuzzy Control ◽  
Flow Control ◽  
Control Strategy ◽  
Control Algorithm ◽  
Water Injection ◽  
Adaptive Fuzzy Control ◽  
Adaptive Fuzzy ◽  
Variable Universe ◽  
Injection Technology ◽  
Fuzzy Control Algorithm

The layered synchronous water injection technology in oilfield has such characteristics as strong nonlinearity, interlayer interference, time variation and complex model. The traditional control strategy based on the model often causes system unstable and regulation time too long, thereby making control effect unsatisfactory. To satisfy the requirements of layered synchronous water injection technology, this paper designs a flow controller based on adaptive fuzzy control algorithm with variable universe. The universe will change with variables parameters by adjusting extension-contraction factor. The experimental verification show that the system has good control performance, strong adaptability and short measurement and regulation time with the introduction of variable universe adaptive fuzzy control algorithm into flow control system of layered synchronous water injection technology

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