Cleaning the produced water in offshore oil production by using plant-wide optimal control strategy

Yang, Zhenyu; Pedersen, Simon; Durdevic, Petar

doi:10.1109/oceans.2014.7003038

Cited by 10 publications

(5 citation statements)

References 38 publications

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“…Hasan 35 used the adjoint method and the line search method in optimal control for maximizing the oil revenue in petroleum reservoir systems. Yang et al 36 used optimal control strategies for optimizing the produced water treatment systems. With reference to the existing literature, this work uses the optimal control solution strategy for solving the developed pipeline flushing problem for lubricant industries.…”

Section: Optimal Control Problems and Applicationsmentioning

confidence: 99%

Strategic Optimization of the Flushing Operations in Lubricant Manufacturing and Packaging Facilities

Jerpoth,

Hesketh,

Slater

et al. 2023

ACS Omega

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Commercial lubricant industries use a complex pipeline network for the sequential processing of thousands of unique products annually. Flushing is conducted between changeovers to ensure the integrity of each production batch. An upcoming product is used for cleaning the residues of the previous batch, resulting in the formation of a commingled/mixed oil that does not match the specifications of either of the two batches. The existing operations are based on the operator’s experience and trial and error. After a selected flush time, the samples are tested for their viscosity to determine the success of a flush. The approach results in long downtime, the generation of large commingled oil volumes, and huge economic losses. Hence, to overcome the drawback, our work introduces a solution strategy for systematically optimizing flushing operations and making more informed decisions to improve the resource-management footprint of these industries. We use the American Petroleum Institute-Technical Data Book (API-TDB) blending correlations for calculating the mixture viscosities in real-time. The blending correlations are combined with our first-principles models and validated against well-designed experimental data from the partnered lubricant facility. Next, we formulate an optimal control problem for predicting the optimum flushing times. We solve the problem using two solution techniques viz. Pontryagin’s maximum principle and discrete-time nonlinear programming. The results from both approaches are compared with well-designed experimental data, and the economic and environmental significance are discussed. The results illustrate that with the application of a discrete-time nonlinear programming solution approach, the flushing can be conducted at a customized flow rate, and the necessary flushing volume can be reduced to over 30% as compared to the trial-and-error mode of operation.

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Section: Optimal Control Problems and Applicationsmentioning

confidence: 99%

Strategic Optimization of the Flushing Operations in Lubricant Manufacturing and Packaging Facilities

Jerpoth,

Hesketh,

Slater

et al. 2023

ACS Omega

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“…The elements of produced water are divided into organic and inorganic substances and include dissolved and dispersed oils, grease, metals, radioactive elements, treatment chemicals, formation solids, salts, dissolved gases, scaling products, lubricants, microbes, and chemical oxygen demand (Hayes, Tom, and Dan Arthur, 2004;Judd et al, 2014). Multiple separation steps of de-oiling units are typical in produced water technologies, and each sub-system impacts the others (Yang et al, 2014). As a result, it is critical to include total system behavior in control strategies, often known as plant-wide control (Yang et al, 2016;Arora, J. et al, 2024).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Technology for Produced Water in the Oil and Gas Industry

Walls,

Rogel,

Quaye

et al. 2024

Preprint

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Recent technological advancements in produced water for the oil and gas industry have a long history that spreads over centuries and has roots with many mathematicians, physicists, engineers, and inventors. Working to understand the many ideas and questions has helped to bring the produced water technologies to where we are today. Fluid mechanics is an essential factor in the world of engineering because it comes with significant benefits when designing the necessary equipment to overcome the challenging endeavors of daily operations. Many of us believe certain ideas or products were developed within a specific year not fully understanding the idea or concept might be hundreds of years old. For example, when we think of fluid mechanics, we do not think of Archimedes' immersing King Hiero II crown in water. Archimedes did this to determine the displacement of the water as he knew gold was denser than silver. Archimedes was one of the pioneers who was part of the beginning of fluid mechanics. Another interesting fact is the first valve invented was in 1 AD by Heron of Alexandria. This valve can be described as the very first hydraulic valve. The evolution of technology over hundreds of years has made considerable innovations benefiting engineers all over the world. These innovations come in the form of PLCs, RTUs, PIDs, mathematical formulas, processing methods, and SCADA systems.

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“…PWT commonly consists of multiple separation stages of deoiling units, where each individual sub-system affects the others [6]. Thus, it is crucial to consider the overall system behavior in the control strategies, often referred to as plant-wide control [7].…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Control Strategies for Plant-Wide Produced Water Treatment

et al. 2022

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Offshore produced water treatment (PWT) accounts for cleaning the largest waste stream in the offshore oil and gas industry. If this separation process is not properly executed, large amounts of oil are often directly discharged into the ocean. This work extends two grey-box models of a three-phase gravity separator and a deoiling hydrocyclone, and combines them into a single plant-wide model for testing PWT control solutions in a typical process configuration. In simulations, three known control solutions—proportional-integral-derivative (PID) control, H∞ control, and model predictive control (MPC)—are compared on the combined model to evaluate the separation performance. The results of the simulations clearly show what performance metrics each controller excels at, such as valve wear, oil discharge, oil-in-water (OiW) concentration variance, and constraint violations. The work incentivizes future control to be based on operational policy, such as defining boundary constraints and weights on oil discharge, rather than maintaining conventional intermediate performance metrics, such as water level in the separation and pressure drop ratio (PDR) over the hydrocyclone.

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Cleaning the produced water in offshore oil production by using plant-wide optimal control strategy

Cited by 10 publications

References 38 publications

Strategic Optimization of the Flushing Operations in Lubricant Manufacturing and Packaging Facilities

Strategic Optimization of the Flushing Operations in Lubricant Manufacturing and Packaging Facilities

Recent Advances in Technology for Produced Water in the Oil and Gas Industry

Performance Comparison of Control Strategies for Plant-Wide Produced Water Treatment

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