Opening New Exploration Frontiers With The Micro-Flux Control Method For Well Design

2004 ◽  
Author(s):  
H. Santos ◽  
P. Reid ◽  
A. Lage
Keyword(s):  
Control Method ◽  
Flux Control ◽  
Well Design

Delivering More Fit-for-Purpose Wells with Low Cost Approach at Untapped Area Matured Field – Application of Cone Concept Statistical Approach

2021 ◽  
Author(s):  
M. Hatta M. Yusof ◽  
M. Zarkashi Sulaiman ◽  
Rahimah A. Halim ◽  
Nurfaridah Ahmad Fauzi ◽  
Ahgheelan Sella Thurai ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Statistical Approach ◽  
Control Method ◽  
Low Cost ◽  
Volatile Oil ◽  
Field Application ◽  
Well Design ◽  
Execution Phase ◽  
Sand Control ◽  
Fit For Purpose

Abstract This paper discusses the Case study of Field A in offshore Sarawak, Malaysia which focus on re-thinking development based on statistical analysis of the fields. Conventionally, well design is driven by subsurface requirement by targeting the high-reserve sand and well is designed to meet subsurface objectives. However, the conventional way may not be efficient to develop matured field environment due to the high CAPEX and the inconsistencies among well design especially in current volatile oil price period. The objective of this fit-for-purpose approach which is called "Cone Concept Statistical Approach" is to steer away from the conventional way of targeting only sweet spots whilst leaving the remaining potential resources undeveloped. Based on the statistical analysis and subsurface fields pattern, the "Cone Concept Statistical Approach" in which standardizing well design and trajectories was developed to extract the whole fields’ reserve at maximum. Well design boundaries were introduced to ensure this approach can be replicated throughout the field. Not only this study covers drilling perspective, completion perspective was also taken into consideration by exploring a cheaper and fit for purpose sand control method, considering it is a matured field with relatively short remaining field life. The Well Cost Catalogue for this field-specific approach was also developed which contains different types of design and completion, in order to holistically evaluate sand control method and identify the best option for the project moving forward. This "Cone Concept Statistical Approach" aims to enable operator to drill simple wells within the same allocated budget in which poses low-to-no risk in the design and execution phase. This promotes a learning curve to improve operation & HSE, and ultimately gets positive project economics. Since this simple approach can be implemented early on even during the pre-FEL stage, the FDP team & host authority can come together to jointly discuss the targets/platform ranking and segregate them into various phases. Hence, the number of platforms or drilling centers, and its location also can be optimized early on with this concept, and again, translating into further reduction in overall project cost. This paper will help other operators and host authority to understand better on how a specific development concept on statistical approach can result and turn the matured-challenging fields into more economically attractive projects – low overall development cost and maximizing the recovery.

Developing the Micro-Flux Control Method Part 1: System Development, Field Test Preparation and Results.

2005 ◽  
Author(s):  
Helio Mauricio Santos ◽  
Paul Ian Reid ◽  
Julian Leigh Jones ◽  
John McCaskill
Keyword(s):  
Field Test ◽  
Control Method ◽  
System Development ◽  
Test Preparation ◽  
Flux Control

scholarly journals Direct flux control – sensorless control method of PMSM for all speeds – basics and constraints

2017 ◽  
Vol 53 (16) ◽  
pp. 1110-1111 ◽  
Author(s):  
T. Müller ◽  
C. See ◽  
A. Ghani ◽  
A. Bati ◽  
P. Thiemann
Keyword(s):  
Control Method ◽  
Sensorless Control ◽  
Flux Control ◽  
All Speeds

scholarly journals Fast Flux and Torque Control of a Double Inverter-Fed Wound Machine Considering All Coupling Interferences

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1845
Author(s):  
Yongsu Han
Keyword(s):  
Control Method ◽  
Controller Design ◽  
Design Method ◽  
Current Control ◽  
Torque Control ◽  
Flux Control ◽  
Efficient Operation ◽  
Decoupling Method ◽  
Current Controller ◽  
Fast Flux

For efficient operation of the squirrel cage induction motor, the flux must be properly adjusted according to the torque. However, in such variable flux operation, the performance of torque control is limited by the flux control because it is not possible to measure and control the rotor current that affects the flux. On the contrary, in a double inverter-fed wound machine (DIFWM), the inverter is connected to the rotor side, as well as the stator side, and the rotor current can be controlled. This controllability of the rotor currents improves the operation performance of a DIFWM. This article presents the decoupling current control method of a DIFWM for fast flux and torque control. Since the rotor flux is directly calculated by the stator and rotor currents, the bandwidth of the flux control can be improved to the bandwidth of the current controller, which means that the torque control also has the same bandwidth. In this article, a detailed current controller design method with a DIFWM feed-forwarding decoupling method to eliminate all coupling interferences is proposed. The simulation and experimental results regarding the DIFWM are presented to verify the torque and flux control performance of the proposed control method.

Direct Torque Control of Asynchronous Motor Based on Flux Auto Switching

2011 ◽  
Vol 328-330 ◽  
pp. 1693-1696
Author(s):  
Shi Qiu Li ◽  
Shu Ai Hao ◽  
Xu Ma ◽  
Yong Mei Cheng
Keyword(s):  
Control Strategy ◽  
High Speed ◽  
Control Method ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Harmonic Current ◽  
Flux Control ◽  
Low Speed ◽  
Switching Losses

Based on the theory of direct torque control, the simulation model of asynchronous motor is designed to solve two problems. The one is that asynchronous motor in high speed, if a single circular flux control method used, its switching losses will be great; the other one is that asynchronous motor in low speed, if a single hexagonal flux control method used, it will make a large harmonic current. So double modes are used in solve problems together in this paper. That is when asynchronous motor runs at low speed circular flux control strategy is adopted, and when it runs at high speed hexagon flux control strategy is adopted. Auto-switch between circular flux control strategy and hexagon flux control strategy is achieved. Simulation results show that not only the harmonic current can be reduced, and the switching losses are reduced effectively by smooth switching the two control strategies.

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