Process control in conventional oil and gas fields—Challenges and opportunities

Foss, Bjarne A.

doi:10.1016/j.conengprac.2011.11.009

Cited by 53 publications

(30 citation statements)

References 57 publications

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“…Conventionally, a multi-level hierarchy is used to organize the optimization of petroleum systems, where each level involves optimization of some objective over different decision horizons (Foss, 2012). The problem we study in this paper is shut-in based optimization of shale-gas wells over horizons spanning from weeks to a couple of months.…”

Section: Formulation Of the Production Optimization Problemmentioning

confidence: 99%

“…Hence, the problem is categorized as a short to midterm production optimization problem. These problems typically aim at maximizing daily production rates or keeping production at some prespecified target or reference rate (Foss, 2012). Due to a large number of wells producing to a shared processing and control unit, cf.…”

Section: Formulation Of the Production Optimization Problemmentioning

confidence: 99%

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Shut-in based production optimization of shale-gas systems

Knudsen

Foss

2013

Computers & Chemical Engineering

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Section: Formulation Of the Production Optimization Problemmentioning

confidence: 99%

Section: Formulation Of the Production Optimization Problemmentioning

confidence: 99%

Shut-in based production optimization of shale-gas systems

Knudsen

Foss

2013

Computers & Chemical Engineering

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“…This work is focused on the control and automation layer of a multi-level offshore control hierarchy (Foss, 2012) and on the production optimization layer. Our suggested control structure is represented in Figure 2.…”

Section: Closed-loop Controlmentioning

confidence: 99%

A two-layer structure for stabilization and optimization of an oil gathering network**We acknowledge the support of the Center for Integrated Operations at NTNU (Norway).

2016

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In this work, we present the control and optimization of a network consisting of two gas-lifted oil wells, a common pipeline-riser system and a separator. The gas-lifted oil wells may be open-loop unstable. The regulatory layer stabilizes the system by cascade control of wellhead pressure measurements without needing bottom hole sensing devices. An economic Nonlinear Model Predictive Control (NMPC) based on the Multiple Shooting (MS) formulation is applied for optimization of the network operations. The optimization layer thus provides optimal settings for the regulatory controllers. The control structure has been validated by using the realistic OLGA simulator as the process, and using simplified models for Kalman filtering and the NMPC design. The simplified models are implemented in Modelica and fit to the Olga model to represent the main dynamics of the system. The proposed two-layer controller was able to stabilize the system and increase the economical outcome.

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“…Moreover, physical-based models are also considered as data generators and as basis for simulations and simulator development. The utilization of data based models could reduce the level of uncertainty and provide means for prediction of information, handling of large data loads, as well as fusing of data from different sources (Foss, 2012).…”

Section: Online Risk Management Frameworkmentioning

confidence: 99%

On the need for online decision support in FPSO–shuttle tanker collision risk reduction

2015

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More than 100 Floating Production Storage & Off-loading (FPSO) concepts are in operation at the moment worldwide, and due to increasing demand many are currently under construction or being converted from commercial tankers. Still, operational risk is an issue that is not considered thoroughly in the initial feed stage, especially when compared to fixed installations. Floating installations are more dependent on manual control of some of the marine systems during normal operations, as well as during critical situations. Accidents can be initiated by errors induced by human and organizational factors (HOF), technical (design) failures, environmental conditions, or a combination of all three. Therefore, effective means are extremely important to prevent or mitigate the effects of potential operational accidents that can result in serious accidents. Updated statistics in 2013 revealed that the frequency of operational accidents during the last ten years was significantly above the target value that has been aimed for, in fact it was concluded that the frequency was around one order of magnitude higher. Hence, the objective of this article is to assess the hazards, the existing barriers, the risk level, and the risk reduction potentials more thoroughly.

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Process control in conventional oil and gas fields—Challenges and opportunities

Cited by 53 publications

References 57 publications

Shut-in based production optimization of shale-gas systems

Shut-in based production optimization of shale-gas systems

A two-layer structure for stabilization and optimization of an oil gathering network**We acknowledge the support of the Center for Integrated Operations at NTNU (Norway).

On the need for online decision support in FPSO–shuttle tanker collision risk reduction

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