Offshore concept field development

2015 ◽  
Vol 55 (2) ◽  
pp. 454
Author(s):  
Greg Saunders ◽  
Matthew Poole
Keyword(s):  
Management Strategy ◽  
Selection Process ◽  
Final Solution ◽  
Concept Selection ◽  
Field Development ◽  
Subsequent Investigation ◽  
Design Perspective ◽  
Technical Study ◽  
Development Concept ◽  
Selection Phase

This extended abstract describes the field development concept selection process for Karoon Gas Australia, as part of the appraisal and commercialisation of an oil resource in offshore Brazil. From an engineering design perspective, the concept selection phase offers the greatest opportunity to create project value. Options must be carefully considered before rigorous investigation to provide a firm foundation for key decisions. The concept selection study and option consideration began with a two-day framing and option identification workshop. Nine key decisions were identified as having significant impact on the feasibility and cost of the development. These included the wellhead type, hydrate management strategy, floating production storage and offloading vessel (FPSO) capacity, FPSO location, mooring type, subsea architecture, product export and expansion provisions. Assessment criteria were agreed on for each of the key technical decisions; these were applied in the evaluation of options defined. This workshop facilitated definition and agreement for the technical study scope. The subsequent investigation and selection process focused on the key development decisions that needed to be made immediately, compared to those that could be made at a later stage of the development. These decisions encompassed technical viability, dry trees versus wet trees, flow assurance, mooring type and processing capacity. A geologically complex reservoir drove many elements of the development selection process. This extended abstract highlights that the final solution balances risk management with maximising project value. The recommended base development concept is analogous to many developments already implemented in Brazil and is flexible enough to accommodate a realistic range of outcomes from future appraisal wells.

The Role of Geophysical Uncertainty in Field Development Concept Selection

2013 ◽  
Author(s):  
Daria Krasova ◽  
Sverre Tresselt ◽  
Ivar Meisingset ◽  
Thomas Forde ◽  
Stale Romundstad
Keyword(s):  
Concept Selection ◽  
Field Development ◽  
Development Concept

FORMATION OF A FINANCIAL SECURITY MANAGEMENT STRATEGY FOR RETAIL ENTERPRISES

2017 ◽  
Author(s):  
Mukhina Marharyta ◽  
Keyword(s):  
Management Strategy ◽  
Mutual Influence ◽  
Selection Process ◽  
Synergistic Effects ◽  
Target Function ◽  
Security Management ◽  
Financial Security ◽  
Rapid Diagnostics ◽  
Logical Scheme ◽  
Integral Assessment

The article considers the formation of a strategy for managing the financial security of trade enterprises. The stages of assessing the external and internal environment of trade enterprises are constructed. It is proposed to define the process of optimizing the choice of strategy alternatives in the form of a structural and logical scheme in the following sequence: Priority Selection; rapid diagnostics of the strategic position; Organization of the strategy selection process based on strategic diagnostics; selection of the optimal strategy. An algorithm for choosing a financial security management strategy is proposed, which allows taking into account the strategic positions of enterprises, their interdependence and mutual influence, synergistic effects, and leads to an increase in its value. In this regard, it is proposed to use the methodology of optimizing the capital structure to justify the limitations and choose a diversification strategy. Based on the completed SPACE analysis, the vector of the selected strategy option is determined. An integral assessment of strategic alternatives of a trading enterprise for favorable environmental conditions and a high level of potential for financial and economic stability was carried out. Four strategies for managing the financial security of trade enterprises are analyzed: development; stabilization; diversification; formation. It is proved that an appropriate tool for analyzing the choice of strategic positions is rapid diagnostics based on the hierarchy analysis method. Thus, it can be concluded that from among the above options for managing financial security, you should choose the one that corresponds to the strategy of sustainable development of the enterprise. These don't necessarily have to be those that reach the maximum value of the objective function. A more balanced solution may be to choose options that are characterized by both a high value of the target function and relatively high or stable growth rates of operational potential, which ensures an increase in profitability.

Favoring Complexity: A Mixed Methods Exploration of Factors That Influence Concept Selection When Designing for Additive Manufacturing

2021 ◽  
Vol 143 (10) ◽  
Author(s):  
Rohan Prabhu ◽  
Rainmar L. Leguarda ◽  
Scarlett R. Miller ◽  
Timothy W. Simpson ◽  
Nicholas A. Meisel
Keyword(s):  
Additive Manufacturing ◽  
Selection Process ◽  
Solution Space ◽  
Idea Generation ◽  
Concept Selection ◽  
Stage Design ◽  
Four Dimensions ◽  
Build Time ◽  
Traditional Manufacturing ◽  
Selection Stage

Abstract The capabilities of additive manufacturing (AM) open up designers’ solution space and enable them to build designs previously impossible through traditional manufacturing (TM). To leverage this design freedom, designers must emphasize opportunistic design for AM (DfAM), i.e., design techniques that leverage AM capabilities. Additionally, designers must also emphasize restrictive DfAM, i.e., design considerations that account for AM limitations, to ensure that their designs can be successfully built. Therefore, designers must adopt a “dual” design mindset—emphasizing both, opportunistic and restrictive DfAM—when designing for AM. However, to leverage AM capabilities, designers must not only generate creative ideas for AM but also select these creative ideas during the concept selection stage. Design educators must specifically emphasize selecting creative ideas in DfAM, as ideas perceived as infeasible through the traditional design for manufacturing lens may now be feasible with AM. This emphasis could prevent creative but feasible ideas from being discarded due to their perceived infeasibility. While several studies have discussed the role of DfAM in encouraging creative idea generation, there is a need to investigate concept selection in DfAM. In this paper, we investigated the effects of four variations in DfAM education: (1) restrictive, (2) opportunistic, (3) restrictive followed by opportunistic (R-O), and (4) opportunistic followed by restrictive (O-R), on students’ concept selection process. We compared the creativity of the concepts generated by students to the creativity of the concepts they selected. The creativity of designs was measured on four dimensions: (1) uniqueness, (2) usefulness, (3) technical goodness, and (4) overall creativity. We also performed qualitative analyses to gain insight into the rationale provided by students when making their design decisions. From the results, we see that only teams from the restrictive and dual O-R groups selected ideas of higher uniqueness and overall creativity. In contrast, teams from the dual R-O DfAM group selected ideas of lower uniqueness compared with the mean uniqueness of ideas generated. Finally, we see that students trained in opportunistic DfAM emphasized minimizing build material the most, whereas those trained only in restrictive DfAM emphasized minimizing build time. These results highlight the need for DfAM education to encourage AM designers to not just generate creative ideas but also have the courage to select them for the next stage of design.

Favoring Complexity: A Mixed Methods Exploration of Factors That Influence Concept Selection in Design for Additive Manufacturing

2020 ◽  
Author(s):  
Rohan Prabhu ◽  
Rainmar L. Leguarda ◽  
Scarlett R. Miller ◽  
Timothy W. Simpson ◽  
Nicholas A. Meisel
Keyword(s):  
Additive Manufacturing ◽  
Selection Process ◽  
Solution Space ◽  
Idea Generation ◽  
Concept Selection ◽  
Educational Groups ◽  
Early Design Stages ◽  
Traditional Manufacturing ◽  
Design For Am

Abstract The capabilities of additive manufacturing (AM) open up designers’ solution space and enable them to build designs previously impossible through traditional manufacturing. To leverage AM, designers must not only generate creative ideas, but also propagate these ideas without discarding them in the early design stages. This emphasis on selecting creative ideas is particularly important in design for AM (DfAM), as ideas perceived as infeasible through the traditional design for manufacturing lens could now be feasible with AM. Several studies have discussed the role of DfAM in encouraging creative idea generation; however, there is a need to understand concept selection in DfAM. In this paper, we investigated the effect of two variations in DfAM education: 1) restrictive DfAM and 2) dual DfAM (opportunistic and restrictive) on students’ concept selection process. Specifically, we compared the creativity of the concepts generated by the students to the creativity of the concepts selected by them. Further, we performed qualitative analyses to explore the rationale provided by the students in making these design decisions. From the results, we see that teams from both educational groups select ideas of greater usefulness; however, only teams from the restrictive DfAM group select ideas of higher uniqueness and overall creativity. Further, we see that introducing students to opportunistic DfAM increases their emphasis on the complexity of designs when evaluating and selecting them. These results highlight the need for DfAM education to encourage AM designers to not just generate but also select creative ideas.

Impacts of Cold Climate Environmental Conditions on a Riser System Design and Installation

2015 ◽  
Author(s):  
Adekunle Peter Orimolade ◽  
Ove Tobias Gudmestad
Keyword(s):  
Environmental Conditions ◽  
Oil And Gas ◽  
Barents Sea ◽  
Research Work ◽  
Cold Climate ◽  
Field Development ◽  
Climate Region ◽  
Probability Of Occurrence ◽  
The Barents Sea ◽  
Development Concept

Interests in exploration and production of oil and gas in cold climate areas has increased in recent times. This can be attributed to the continual depletion of reserves in mature fields, and recent discoveries of large quantities of oil and gas in the cold climate region, including the more recent discovery of the Alta Reservoir, in the Barents Sea. However, marine operations in this region are faced with challenges resulting from its arctic conditions. Knowledge of the physical environment is important in designing offshore structures, and in planning, and executing marine operations. Selection of a suitable field development concept may be influenced by the probability of occurrence of rare events, such as drifting icebergs. Furthermore, occurrence of mesoscale phenomenon such as polar low pressures may adversely affect planned marine operations. In addition, uncertainties in weather forecasting will reflect on the available weather window to perform installation and interventions works. This paper presents some of the challenges in designing and planning for marine operations in the cold climate region. A possible field development concept for the open water areas of the Norwegian sector of the Barents Sea is discussed. The current research work considers the need for further assessment of the probability of occurrence of drifting icebergs as of importance when selecting field development concept. The Floating Production Storage and Offloading (FPSO) is proposed, and this should be designed with an internal turret system that can be disconnected and reconnected. Some of the challenges associated with riser systems design when considering a turret system with the capability to disconnect and reconnect are discussed. This paper also propose the use of ensemble forecasts as an alternative to the use of alpha factors to estimate operational weather window when planning for marine operations in the Barents Sea. The unpredictability nature of the environmental conditions, especially in the early winter is considered a challenge to marine operations.

Interference of Top Tensioned Risers for Tension Leg Platforms

2017 ◽  
Author(s):  
Hanqing Zhang ◽  
Derek Smith
Keyword(s):  
Production Systems ◽  
Selection Process ◽  
Combined Effects ◽  
Direct Impact ◽  
Interference Analysis ◽  
Field Development ◽  
Strong Current ◽  
Induced Velocity ◽  
Oscillating Motion ◽  
Wave Induced

Dry tree top-tensioned risers (TTRs) are widely used on floating production systems such as TLPs and Spars for drilling, completion, workover and production. The interference between neighboring TTRs is an important consideration which has a direct impact on the total TTR payload budget and the wellbay size for floater sizing and cost. Since the realistic sizing of a floater is essential towards the concept selection process for a field development, TTR interference should be addressed at the early stages of an offshore oilfield development. If the floater is a tension leg platform (TLP) and the field has strong current with associated extreme waves, riser interference may be very challenging and can have direct impact on riser design and the sizing and layout of the TLP. The waves and the oscillating motions of the TLP will have effects on riser interference. The oscillating motion of the TLP can excite the vibrational motion of the risers, and the wave-induced velocity of water particles and the motions of the risers with the movement of the TLP increases the relative flow acting on each riser. The combined effects will increase the deflection of the risers and thus the likelihood of riser interference. The industry has not seen an acceptable interference analysis approach yet which can account for the combined effects of current, waves, and TLP motions. This paper proposes two engineering approaches for the interference analysis of top tensioned risers for tension leg platforms with the combined effects of current, surface waves, and associated floater motions being addressed.

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