Blar i Institutt for geovitenskap og petroleum på forfatter "Pavlov, Alexey"
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Dither signal optimization for multi-agent extremum seeking control
Silva, Thiago Lima; Pavlov, Alexey (Chapter, 2020)In this paper we formulate and solve the problem of multi-agent extremum seeking with dither signals optimization. The solution is a distributed perturbation-based extremum-seeking controller with an additional objective ... -
Dither signals optimization in constrained multi-agent extremum seeking control
Silva, Thiago Lima; Pavlov, Alexey (Peer reviewed; Journal article, 2021)In this paper we consider the problem of optimization of a multi-agent system with constraints through perturbations-based extremum seeking control. We demonstrate that for such systems, effects of dither signals applied ... -
Drilling Fluid Measurements
Steinsheim, Kristin (Master thesis, 2020)Strømningsmålinger er en viktig del av boreprosessen. Hensikten med målingene er prosessoptimalisering, monitorering av operasjoner og opprettholding av sikkerhet. Denne masteroppgaven er todelt. Første del handler om ... -
Drilling in Karstified Carbonates: Early Risk Detection Technique
Maksimov, Danil; Pavlov, Alexey; Sangesland, Sigbjørn (Peer reviewed; Journal article, 2020)Heterogeneous nature and complex rock properties of carbonate reservoirs makes the drilling process challenging. One of these challenges is uncontrolled mud loss. Caves or a system of cavities could be a high-risk zone for ... -
Micro-Testing While Drilling for Rate of Penetration Optimization
Nystad, Magnus; Pavlov, Alexey (Chapter, 2020)The Rate of Penetration (ROP) is one of the key parameters related to the efficiency of the drilling process. Within the confines of operational limits, the drilling parameters affecting the ROP should be optimized to drill ... -
Micro-Testing While Drilling for Rate of Penetration Optimization: Experiments and Simulations
Nystad, Magnus Edvard; Aadnøy, Bernt Sigve; Pavlov, Alexey (Peer reviewed; Journal article, 2021)The rate of penetration (ROP) is one of the key parameters related to the efficiency of the drilling process. Within the confines of operational limits, the drilling parameters affecting the ROP should be optimized to drill ... -
Nondisturbing extremum seeking control for multi-agent industrial systems
Haring, Mark A. M.; Fossøy, Synne; Silva, Thiago Lima; Pavlov, Alexey (Peer reviewed; Journal article, 2022)Industrial applications of extremum seeking control (ESC) can be a hit and miss affair. Although a gain in performance can be achieved, the dither applied to excite the system causes unwanted fluctuations in the performance ... -
Practical extremum-seeking control for gas-lifted oil production
Pavlov, Alexey; Haring, Mark; Fjalestad, Kjetil (Chapter, 2017)We present a distributed extremum seeking algorithm for the problem of production optimization of multiple gas lifted wells. The algorithm is based on “synchronization” of production performance gradients for all individual ... -
Prediction and early detection of karsts for safer drilling in carbonates
Maksimov, Danil (Doctoral theses at NTNU;2022:108, Doctoral thesis, 2022)Underestimation of drilling hazards in carbonates can lead to serious consequences to personnel and the environment. The history of drilling in carbonates has shown that the vast majority of drilling incidents are associated ... -
Prediction and Early Detection of Karsts — An Overview of Methods and Technologies for Safer Drilling in Carbonates
Maksimov, Danil; Pavlov, Alexey; Sangesland, Sigbjørn (Peer reviewed; Journal article, 2021)The nature of carbonate deposition as well as diagenetic processes can cause the development of unique geological features such as cavities, vugs and fractures. These are called karsts. Encountering karsts while drilling ... -
Prediction of production parameter for Mid-term Production Optimization
Mmari, Erca Wilfred (Master thesis, 2018)In this Mater thesis, three different methods of prediction were proposed. The aim is to test if with a certain accuracy one can predict the production parameter of a certain well. To do this, several cases with different ... -
Probabilistic Economic Assessment of an Offshore Energy Hub Supplying Electrical Power to a Floating Production Storage and Offloading Unit
Abritta Aguiar Santos, Ramon; Pavlov, Alexey; Varagnolo, Damiano; Tore Børresen, Børre (Journal article, 2023)This paper analyzes the viability of an offshore energy hub consisting of wind turbines, batteries, fuel cells and electrolyzers connected to, and powering, an oil producing floating production storage and offloading unit. ... -
Probabilistic Economic Assessment of an Offshore Energy Hub Supplying Electrical Power to a Floating Production Storage and Offloading Unit
Abritta, Ramon; Pavlov, Alexey; Varagnolo, Damiano; Børresen, Børre Tore (Chapter, 2023)This paper analyzes the viability of an offshore energy hub consisting of wind turbines, batteries, fuel cells and electrolyzers connected to, and powering, an oil producing floating production storage and offloading unit. ... -
Real time optimization of systems with fast and slow dynamics using a lookahead strategy
Andersen, Joakim Rostrup; Silva, Thiago Lima; Imsland, Lars Struen; Pavlov, Alexey (Chapter, 2020)Systems with fast and slow dynamics give rise to objectives in different time scales which may not be aligned. The existing dynamic optimal control methods might become computationally infeasible due to the fine discretization ... -
Real-Time Data-Driven Drilling Optimization
Nystad, Magnus (Doctoral theses at NTNU;2021;348, Doctoral thesis, 2021)Drilling a well for exploration or production of petroleum resources is a costly and complicated procedure. There is a great potential for cost reduction by drilling safer, faster and with less Non-Productive Time (NPT). ... -
Real-Time Detection of Karstification Hazards While Drilling in Carbonates †
Maksimov, Danil; Pavlov, Alexey; Sangesland, Sigbjørn (Peer reviewed; Journal article, 2022)The nature of carbonate deposition can cause the development of unique geological features such as cavities and vugs called karsts. Encountering karsts while drilling can lead to serious consequences. To improve drilling ... -
Real-Time Minimization of Mechanical Specific Energy with Multivariable Extremum Seeking
Nystad, Magnus; Aadnøy, Bernt Sigve; Pavlov, Alexey (Peer reviewed; Journal article, 2021)Drilling more efficiently and with less non-productive time (NPT) is one of the key enablers to reduce field development costs. In this work, we investigate the application of a data-driven optimization method called ... -
Synchronization of networked oscillators under nonlinear integral coupling
Pavlov, Alexey; Proskurnikov, Anton; Steur, Erik; van de Wouw, Nathan (Journal article; Peer reviewed, 2018)In this paper, we consider synchronization of dynamical systems interconnected via nonlinear integral coupling. Integral coupling allows one to achieve synchronization with lower interaction levels (coupling gains) than ... -
Trajectory control, kick-detection and friction test: Transitioning to an automated drilling system.
Hiwa, Arman; Mannsverk, Jonas; Meyer, Vilde Romslo (Master thesis, 2020)Denne masteroppgaven var originalt tiltenk å dekke Fase 2 av Drillbotics konkurransen. Dette ble endret som følge av COVID-19 utbruddet. Arbeidet utført i forkant av COVID-19 er vedlagt, slik at det kan videreformidles til ... -
Trajectory control, kick-detection and friction test: Transitioning to an automated drilling system.
Hiwa, Arman; Mannsverk, Jonas; Meyer, Vilde Romslo (Master thesis, 2020)Denne masteroppgaven var originalt tiltenk å dekke Fase 2 av Drillbotics konkurransen. Dette ble endret som følge av COVID-19 utbruddet. Arbeidet utført i forkant av COVID-19 er vedlagt, slik at det kan videreformidles til ...