Well Design for Subsea Exploration Drilling in Shallow Formations of Barents Sea

2021 ◽  
Author(s):  
Mikolaj Stanislawek
Keyword(s):  
Design Process ◽  
Barents Sea ◽  
Weather Conditions ◽  
Design Approach ◽  
Drilling Process ◽  
Well Control ◽  
Pilot Hole ◽  
Planning Phase ◽  
Well Design ◽  
Exploration Drilling

Abstract Subsea exploration drilling in relatively new and not yet fully recognized frontiers like Barents Sea continues to be a focus for Oil & Gas Companies. Safety and robust well barriers are important as ever. This paper describes well design process and execution of a challenging subsea exploration well in shallow formations of Barents Sea by Equinor. Case study for planning and well design process is presented, followed by drilling experiences during execution. Several well design concepts and contingency scenarios that were evaluated and risk assessed in the planning phase are presented, which required extra focus on well design and well barriers. Compensating measures along with high focus on well control and well barriers in shallow drilling environment of Barents Sea were developed during planning phase of this well, and reviewed with planning and execution teams. Design approach encompasses casing design in shallow reservoir well with narrow margin between required formation integrity and fracture pressures, low kick tolerance, drilling in unstable formations, low temperature and pressures. Robust well design in shallow and weak formations is feasible with conventional casing design approach, and well challenges can be overcome by proper planning and contingency measures involving additional preparation of drilling crew, and by use of advanced drilling technology and procedures. Safety and well control is the most important factor in well design. Relevant contingency scenarios should be prepared with equipment and procedures in place. Importance of drilling a pilot hole in unrecognized area near main well and its influence on main well design is crucial. This is a good example of planning and drilling process for challenging well in unrecognized area with limited reference well data, challenging logistics, and weather conditions of Barents Sea. It will demonstrate how many contingency scenarios were fully prepared in planning phase and their rationale, versus encountered drilling experiences, to be a more precise reference for future wells in the area.

Observation of Subsea BOP Response From Field Measurements and Reflections on Conductor Design Challenges

2017 ◽  
Author(s):  
Harald Holden ◽  
Heidi Gryteland Holm ◽  
Youhu Zhang ◽  
Victor Smith ◽  
Randi Næss
Keyword(s):  
Barents Sea ◽  
Complex Loading ◽  
Field Measurements ◽  
Soil Reaction ◽  
The North ◽  
Well Design ◽  
Exploration Drilling ◽  
Vessel Motion ◽  
Design Analyses ◽  
Exploration Well

Subsea exploration well systems are subjected to complex loading due to vessel motion and hydrodynamic forces on the riser. In design of the wells, both the ULS/ALS design under extreme loading and fatigue design under operational loading are heavily dependent on the soil support along the uppermost 20 m of the conductor casing. In today’s practice, design of the conductor against extreme loading is typically performed using the soil reaction curves (p-y springs) recommended in API RP 2GEO [1]. In recent years, 4Subsea have been monitoring the BOP and riser responses during exploration drilling campaigns for Lundin Norway. The purpose of these monitoring campaigns is to track the performance of the wells with time, based on integrity parameters such as well stiffness, BOP resonance frequency and BOP motion rotational depth. This paper summarizes the monitoring results from seven well locations in the North Sea and the Barents Sea. The observed well response is compared with up-front design analyses. The discrepancy between up-front design analyses and the observed performances is discussed in light of the uncertainties associated with the geotechnical input parameters and soil reaction models. The purpose of the paper is to reflect on the challenges faced with exploration well design and highlight areas that improvements can be made.

Modeling of Multi-Agent System for Drilling Simulation

2011 ◽  
Vol 383-390 ◽  
pp. 1555-1561
Author(s):  
Wu Li Wang ◽  
Yan Jiang Wang
Keyword(s):  
Simulation System ◽  
Drilling Process ◽  
Multi Agent System ◽  
Agent System ◽  
Oil Drilling ◽  
Well Control ◽  
Existing Problems ◽  
System A ◽  
Multi Agent ◽  
Drilling Simulation

In view of the characteristics of the oil drilling process and the existing problems of traditional simulation system, a new distributed drilling simulation model was established based on Multi-Agent system (MAS) technology. By means of autonomous, cooperative and reactive characteristic of Agent, the drilling laws and phenomenon can be reflected promptly and accurately under any circumstances. The MAS modeling for oil drilling simulation, the structure and knowledge representation of each Agent and the communication among Agents are described in detail. Finally, an Agent-based normal drilling well control simulation training example was given. The simulation results show that the simulator based on Multi-Agent system has better performances than traditional drilling simulators, and enhances the integrated training function of the drilling simulation system.

Analysis of Riser Gas Pressure from Full-Scale Gas-in-Riser Experiments with Instrumentation

2021 ◽  
Author(s):  
Mahendra R Kunju ◽  
Mauricio A Almeida
Keyword(s):  
Full Scale ◽  
Drilling Process ◽  
Control Methods ◽  
State University ◽  
Gas Migration ◽  
Well Control ◽  
Louisiana State University ◽  
Managed Pressure Drilling ◽  
Upward Transport ◽  
Minimal Fluid

Abstract As the use of adaptive drilling process like Managed Pressure Drilling (MPD) facilitates drilling of otherwise non-drillable wells with faster corrective action, the drilling industry should review some of the misconceptions to produce more efficient well control methods. This paper discusses results from full-scale experiments recently conducted in an extensively instrumented test well at Louisiana State University (LSU) and demonstrate that common expectations regarding the potential for high/damaging internal riser pressures resulting from upward transport or aggregation of riser gas are unfounded, particularly when compressibility of riser and its contents are considered. This research also demonstrates the minimal fluid bleed volumes required to reduce pressure build-up consequences of free gas migration in a fully closed riser.

Novel Drill Bit Analysis to Delay and Mitigate Fixed Cutter Thermal Damage

2021 ◽  
Author(s):  
Sion Llywelyn Roberts ◽  
Michael James Bailey ◽  
Afshin Babaie Aghdam ◽  
Ahmed Suleiman ◽  
Ahmed Fathy
Keyword(s):  
Cooling Rate ◽  
Design Process ◽  
Thermal Damage ◽  
Drilling Process ◽  
Drill Bit ◽  
Operational Parameters ◽  
Thermal Index ◽  
Testing Phase ◽  
Index Analysis ◽  
Input Load

Abstract As oil and gas wells become deeper, drilling longer intervals is becoming a major milestone for drill bit companies, as the process comes with a variety of challenges affecting the durability of drill bits. Among the major challenges are thermal and impact damage in polycrystalline diamond compact (PDC) cutters, which can significantly affect the performance and longevity of a drill bit. While cutter technology development remains an important arena to address said challenges, there exists a need to also address these through the design process. This paper presents the development and deployment of a new drill bit analysis method that addresses thermal damage by optimizing the design, which has been field validated across the globe. The analysis involves estimating the thermal input load and the available cooling rate for every cutter on a drill bit during drilling conditions. The data is then used to optimize and apply changes to the design. The analysis considers all the critical and relevant operational parameters to calculate these indices. The outcome of the so-called thermal index analysis enables the design team to make informed decisions to improve the design of the drill bit and to minimize the extent of thermal damage in cutters. The improvements made in the design include changes in cutting structure to affect cutting forces and, eventually, the thermal input load during the drilling process. This stage in practice can bring down the temperature of the cutting edge by 20%, as calculated analytically. Another major change that can affect the results is hydraulic design of the bit, which includes the location of the nozzles as well as their orientation and size. In test cases, the cooling rate improved by 50% while keeping the same flow rate though the bit. Several field trials have validated the correlation of thermal index analysis to drill bit dulls. This analysis is now in the field evaluation and testing phase, where it is being used during the design process to improve bits with thermal damage. The field-testing phase has been primarily conducted in thermally challenging applications across the Middle East, North Africa region, and in West Texas.

scholarly journals Building Capabilities Through Democratic Dialogues

Design Issues ◽  
2018 ◽  
Vol 34 (4) ◽  
pp. 80-95 ◽  
Author(s):  
Liesbeth Huybrechts ◽  
Katrien Dreessen ◽  
Ben Hagenaars
Keyword(s):  
Design Process ◽  
Participatory Design ◽  
Design Approach ◽  
Railway Track ◽  
Alternative Futures ◽  
Design Processes ◽  
Self Organized ◽  
Complex Design ◽  
Developing Strategies

Designers are increasingly involved in designing alternative futures for their cities, together with or self-organized by citizens. This article discusses the fact that (groups of) citizens often lack the support or negotiation power to engage in or sustain parts of these complex design processes. Therefore the “capabilities” of these citizens to collectively visualize, reflect, and act in these processes need to be strengthened. We discuss our design process of “democratic dialogues” in Traces of Coal—a project that researches and designs together with the citizens an alternative spatial future for a partially obsolete railway track in the Belgian city of Genk. This process is framed in a Participatory Design approach and, more specifically, in what is called “infrastructuring,” or the process of developing strategies for the long-term involvement of participants in the design of spaces, objects, or systems. Based on this process, we developed a typology of how the three clusters of capabilities (i.e., visualize, reflect, and act) are supported through democratic dialogues in PD processes, linking them to the roles of the designer, activities, and used tools.

scholarly journals Is the Linear Modeling Technique Good Enough for Optimal Form Design? A Comparison of Quantitative Analysis Models

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Yang-Cheng Lin ◽  
Chung-Hsing Yeh ◽  
Chen-Cheng Wang ◽  
Chun-Chun Wei
Keyword(s):  
Product Design ◽  
Design Process ◽  
Design Approach ◽  
Modeling Technique ◽  
Type I ◽  
Linear Modeling ◽  
Optimal Form ◽  
Product Image ◽  
Form Design ◽  
Product Forms

How to design highly reputable and hot-selling products is an essential issue in product design. Whether consumers choose a product depends largely on their perception of the product image. A consumer-oriented design approach presented in this paper helps product designers incorporate consumers’ perceptions of product forms in the design process. The consumer-oriented design approach uses quantification theory type I, grey prediction (the linear modeling technique), and neural networks (the nonlinear modeling technique) to determine the optimal form combination of product design for matching a given product image. An experimental study based on the concept of Kansei Engineering is conducted to collect numerical data for examining the relationship between consumers’ perception of product image and product form elements of personal digital assistants (PDAs). The result of performance comparison shows that the QTTI model is good enough to help product designers determine the optimal form combination of product design. Although the PDA form design is used as a case study, the approach is applicable to other consumer products with various design elements and product images. The approach provides an effective mechanism for facilitating the consumer-oriented product design process.

scholarly journals Mapping users' expectations regarding extended-range forecasts

2018 ◽  
Vol 15 ◽  
pp. 99-106 ◽  
Author(s):  
Tiina Ervasti ◽  
Hilppa Gregow ◽  
Andrea Vajda ◽  
Terhi K. Laurila ◽  
Antti Mäkelä
Keyword(s):  
Everyday Life ◽  
Design Process ◽  
General Public ◽  
Online Survey ◽  
Weather Conditions ◽  
The Everyday ◽  
Extended Range ◽  
One Year ◽  
Weather Risks ◽  
Range Forecasts

Abstract. An online survey was used to map the needs and preferences of the Finnish general public concerning extended-range forecasts and their presentation. First analyses of the survey were used to guide the co-design process of novel extended-range forecasts to be developed and tested during the project. In addition, the survey was used to engage the respondents from the general public to participate in a one year piloting phase that started in June 2017. The respondents considered that the tailored extended-range forecasts would be beneficial in planning activities, preparing for the weather risks and scheduling the everyday life. The respondents also perceived the information about the impacts of weather conditions more important than advice on how to prepare for the impacts.

scholarly journals IMPLEMENTING “SUSTAINABILITY-BY-DESIGN” APPROACH IN ORGANIZATIONS BY USING AN EXTENDED RISK INDICATORS SYSTEM FOR MAKING STRATEGIC DECISIONS

2021 ◽  
Vol 11 (4) ◽  
pp. 402-411
Author(s):  
L. A. Sachenko
Keyword(s):  
Sustainable Development ◽  
Adaptive Capacity ◽  
Design Process ◽  
Stakeholder Participation ◽  
Sustainability Indicators ◽  
Design Approach ◽  
Risk Indicators ◽  
Risk And Resilience ◽  
Strategic Decisions ◽  
Rigid Structure

The purpose of this article is to identify possible approaches to the development of the “sustainability-by-design” process, which consists in synchronizing the organization's strategy with the trends of sustainable development. For this purpose, a process of “sustainability-by-design” is proposed on the basis of the “safety-by-design” process applied in practice. As a key link in the process, it is proposed to use a system of sustainability indicators, supplemented by indicators of risk and resilience. To strengthen the adaptive capacity of companies in the field of sustainable development, the process of building “sustainability-by-design” is complemented by the inclusion of democratic procedures through structured stakeholder participation. As a result, the proposed process combines a rigid structure of values and goals with a “soft setup” in the form of democratic procedures. This will allow companies not only to reduce the uncertainties inherent to the pacing problem, but also to create an environment for the promotion of the most effective alternatives to the development of companies in the field of sustainability.

scholarly journals Exploring bio-parametric solution-based design process for an ephemeral pavilion

2021 ◽  
Vol 17 (1) ◽  
pp. 65-79
Author(s):  
Elton Cristovão da Silva Lima ◽  
Cristina Matsunaga ◽  
Leticia Teixeira Mendes
Keyword(s):  
Experimental Design ◽  
Design Process ◽  
Parametric Design ◽  
Anatomical Study ◽  
Parametric Model ◽  
Design Approach ◽  
Sartorius Muscle ◽  
Parametric Solution ◽  
Medial Rotation ◽  
Lateral Rotation

This research proposes an experimental design approach to design an ephemeral pavilion located at the Serpentine Gallery in London. The Serpentine Pavilions Programme functions as an experimentation laboratory and, at the same time, public and event spaces, enabling architects to expose their projects and work methodologies. Thus, the methods of Biomimicry and Parametric Design were combined to develop the pavilion. While the first one was used to create an ephemeral pavilion based on the Sartorius muscle, the second was responsible for generating the parametric model from a fast and intuitive manipulation code capable of exploring shape variations. This work explores the solution-based method approached by Badarnah (2012) based on a predefined problem (the pavilion project) and only after that seek some natural inspiration. Firstly, it was investigated the anatomy of the Sartorius muscle. Subsequently, with the domain of the solution, the parametric insertion of the shape was computationally performed. The anatomical study of the sartorius muscle revealed functions such as flexion, abduction, lateral rotation of the thigh, and medial rotation of the knee. Thus, the architectural choices reflect both its narrow and elongated morphology of the muscle and flexibility and rotation aspects. The pavilion also considered the previous Serpentine Pavilions regarding attributes such as area, height, and materials, which with other parameters may be changed using the code implemented in Grasshopper.

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