bluuebunny/crossref_metadata_2025_split huggingface dataset:
ROP Optimization and Improved Wellbore Quality with New BHA and Drill Bits Modeling in Soft Shallow Formations
Authors: Soares Matheus Morato , dos Passos Adriano Gouveia Lima Gomes , De Lima Flank Melo , De Souza Márcio Francisco Alves , de Souza Moreira Jorge , Martins Aléssio Flávio Vitoretti , Pioli Ricardo Magalhães , Spredemann Ricardo , Buzza Joseph Eduardo Harbi , Fernandes Fernando Bastos 
Published: October 2023

Abstract
The paper introduces a method that enables the drilling of a directional trajectory in shallow and unconsolidated formations of riserless phases through the adjustment of parameters, Rotary Steerable System (RSS) settings and PDC bits configurations. The technique was designed for some specific scenarios: exploratory projects in which maintaining verticality in shallow formations/hazards is mandatory, post-salt projects with significant inclination build in riserless phases, and projects that require kickoff in large diameters. There has been a substantial shift in drilling BHAs historically used in riserless drillings with KOP in shallow formations. The use of positive-displacement mud motors (PDM) combined with tricone bits was replaced by RSS and PDCs bits. To enable the change of BHA and the consequent optimization of performance, some parameters and drilling settings were adjusted, such as: an increase in TFA, flow rate reduction, HSI reduction, increase in the frequency of viscous pills, use of the Pump & Dump technic and readjustment of drilling parameters. The main optimization achieved by the adopted methodology is related to the increase in ROP and improvement in wellbore quality. The performance optimization with RSS and PDC bits was observed not only in the directional part of the trajectory, but also in the vertical section. Another relevant aspect of the method is that it enables drilling trajectories in challenging scenarios: riserless phases in large diameters, such as the "chaotic" ones in the Santos Basin post-salt; shallow or friable formations. These actions have allowed the installation of casings or completion tubings without excessive drag and/or bumps, due to the simplification of the directional design and improvement of wellbore quality. An increase of 39,3% in the average ROP in the worst case scenarios and 112,1% in the best ones were observed, as well as a reduction from 20% in caliper ratio washout to 12% (related to less formation washout due to the application of lower flow rates), an improvement in wellbore quality. In addition, the reduction in flowrare and drilling time allows the use of the Pump & Dump technique, which guarantees geomechanical stability at high inclinations, typical of ultraslender projects. The methodology has ensured risk mitigation (involuntary sidetracks, high drag during installation of completion equipment, improvement in cementation hydraulics, absence of overpull margin and reduced bottom drilling torque available), project scope optimization (reduction in the number of phases in pre-salt projects, ultraslender configuration in the post-salt Campos Basin) and increase in ROP and consequent reduction in well construction time.
Dynamic Analysis to Identify Mathieu Instability on Hanging Riser for Exploitation of Subsea Minerals
Authors: Yamamoto Marcio , Yamamoto Joji , Masanobu Sotaro 
Published: October 2023

Abstract
We investigated the occurrence of Mathieu Instability on a hanging riser under dynamic loads from irregular waves and platform motion. Mathieu Instability shall occur in risers by combining dynamic axial and radial loads with reduced axial tension, resulting in high amplitudes of bending moment and axial tension.
Our model is a 20" drilling riser in the hang-off configuration, including the 6-5/8" Choke/Kill lines. The simulation was repeated for 1,500 m and 4,000 m of water depths, typical depths for polymetallic crusts and nodules, respectively. Besides, we removed the subsea slurry pump to increase the risk of the Mathieu Instability occurrence. However, the Mathieu Instability did not occur in all cases because the numerical results of the axial tension and bending moment amplitudes were reduced. We hypothesize that the drilling riser has enough bending stiffness to mitigate the Mathieu Instability. Besides, the top portion of the 4,000 m riser was tensioned beyond the material's yield strength due to effective tension. Therefore, we expect a structural failure in this case.
Driving Change in the Oil and Gas Industry: A Digital Transformation Framework
Authors: Trindade D. N. , Duarte L. G. , Perico I. , Bandeira G. L. 
Published: October 2023

Abstract
The swift advancement of technology has forced key industrial sectors to expedite their digital transformation processes. Despite the escalating organizational interest in investing in technological advancements, the Oil and Gas (O&G) industry lags in the digitalization race. This research aims to introduce a conceptual framework for businesses to succeed in digital transformation and maintain competitive operations through digitalization.
The Digital Transformation Framework was applied in an O&G company based in Brazil, focused on the Subsea segment, and is built upon three key pillars. First, defining the digital's identity for the company, the materialization in a long-term strategy, and leadership sponsorship. Second, establishing partnerships with IT and Finance departments, and suppliers, the project management and execution engine layer is a channel to collect ideas, workflow for implementation, and follow-up meetings. The third pillar is related to people, which embraces a strong communication plan, the volunteer work of digital agents, the empowerment of employees as developers, and an upskilling program to increase competencies.
The implementation of the framework has successfully increased the digital maturity of the organization and facilitated a sustainable cultural transformation. The framework enabled the generation of improvement ideas, led the automation of critical processes, and enhanced data management. Also, empowered employees to deliver developments independently, and these individuals have been designated as citizen developers.
Moreover, the Digital Agents' role promoted a vital contribution to cultural formation. Their influence and support in major areas have elevated the digital culture, promoting the team's involvement and delivering projects autonomously. Likewise, a training program based on digital awareness following an upskilling plan and linked to business strategy allowed the implementation of new technologies in daily operations. Also, incentive mechanisms were established based on financial recognition, increasing employee visibility to those aligned with the corporate strategy and promoting cultural development. Finally, the partnership with technical developers and suppliers was strengthened, including academia for specialized and high-technological projects.
The Digital Transformation Framework fosters innovation and provides a practical digitalization approach that tailors its applicability to an O&G industry, defining processes, responsibilities, and stakeholders’ collaboration. This case study presents valuable insights regarding feasible implications for companies that embarked on their digital transformation journey and those seeking to navigate the digital landscape.
Carbon Capture and Storage in Brazil and Systematic Review of Criteria for Prospecting Potential Areas
Authors: Lourenço M. C. M , Perez Y. A. R. , Rodrigues T. C. , Rodrigues M. A. F. , Antunes A. F. , Filho L. S. , Montalvão L. C. , Eiras J. F. , Lima C. , Medeiros G. C. , Jacinto M. V. G. , Sátiro L. S. P. 
Published: October 2023

Abstract
This work aims to present the current scenario of Carbon Capture and Storage (CCS) in Brazil and fundamental criteria for prospecting potential areas. It reviews and applies the existing scientific literature used worldwide for CCS projects. By integrating information, we expect to provide comprehensive insights into CCS in Brazil and outline methods and criteria for screening and select areas in Brazilian sedimentary basins.
This work is based on applied research methodologies. A survey was conducted to examine the current Brazilian context, including the potential sectors for CCS in the country and ongoing developments. Additionally, several previous works on projects worldwide were reviewed to formulate criteria for assessing the prospectivity of CO2 storage areas, which can be applied at scale. By combining Brazil's current status and CCS methodological references, we integrated information to propose an applicable site screening and selection criteria for Brazil. Furthermore, we elucidated some of the potential and challenges that the country faces.
In Brazil, energy and industry are the principal sectors for decarbonization with CCS, including the oil and gas sector, bioenergy, thermal power plants, refineries, and steel, cement and chemical industries. Ongoing research is focused on specific storage sites and other CCS technologies. Currently, Brazil's CO2-EOR in the Pre-salt fields is globally recognized. Research is also being conducted on saline aquifers in the Paraná Basin to use CCS with bioenergy (BECCS). Additionally, there is a pilot project under development in the Parecis Basin. Despite these advancements, there have been no few approaches concerning methodologies and criteria for prospecting areas for permanent storage in Brazil. In this study, we propose a methodology for selecting and developing qualified CCS sites, which involves regional analysis, site screening, site selection, and site characterization. Considering Brazil's early stages in CCS implementation, we have provided a list of screening and selection criteria applicable to the country. The expertise and legacy of the oil and gas industry play a crucial role in advancing CCS in Brazil, alongside the intensified national potential through BECCS. In order to progress, the country needs to address necessities such as data availability, policies, the carbon market, and regulations.
This work presents an innovative element to organize and structure key elements to allow a national scale analysis to explore future opportunities for CCS in Brazil. Due to the absence of previous national studies, an unprecedented overview of applicable criteria was provided to prospect potential regions for CCS projects in the country.
Fatigue Analysis of Drill String Using Goodman and Sooderberg SN Curves
Authors: Valença J. P. V , Binas F. A. V. , Ferreira D. V. , Lima E. T. , Barboza A. S. , Riente A. F. 
Published: October 2023

Abstract
Most drill pipe failures are caused by metal fatigue because of repeated or fluctuating stress. The cumulative damage rule and S-N curves are used in a tool to calculate the amount of fatigue life consumed in drill strings. Comparisons are performed between the stress methodologies proposed by Goodman and Soderberg. For the study, a stiff string torque and drag model is used to calculate stress such as axial force, torque, bending moment, and strains. S-N curves are applied to determine the number of alternating stress cycles needed to cause fatigue failure. The Miner’s Rule is used to calculate the cumulative damage, which results in the percentage of life spent during the drilling operations. A fatigue study of a vertical tortuous well, reaching a depth of 3115 meters is carried out. Three BHAs were used to model the drilling process, performing various operations including drilling, rotation-off-bottom, and backreaming operations. The overall fatigue life consumption in a drill collar connection was computed taking into account its reuse in all BHAs. The profiles of stress and fatigue are provided to help in the analysis of the issue. Comparing Goodman’s and Soderberg’s average stress rule models yielded the overall conclusion that the differences between them are very small for the case studied, Goodman’s responses being greater than Soderberg’s. The integration of the model into a torque and drag quantification tool allows analyses to be performed using both average stress techniques, allowing the drill string to be sized in a way that prevents excessive fatigue life consumption.
Effect of Deep Eutectic Solvents on Water-Based Mud Properties
Authors: Karki N. , Hamdi Z. , Sipi A. , Bataee M. , Rostamian A. 
Published: October 2023

Abstract
The paper explores the potential of Choline Chloride-based deep eutectic solvents (DES) to enhance the performance of drilling fluids. While Choline Chloride-based DES can have positive effects such as reducing fluid loss and improving fluid viscosity, it can also pose significant risks to human health and the environment and negatively impact fluid rheology and filtration properties. Therefore, it is important to carefully consider the potential effects of Choline Chloride-based DES on drilling fluid performance before incorporating it into drilling operations. The paper provides a thorough literature analysis and gives insight into the present level of knowledge on Choline Chloride-based DES and its impact on drilling fluid performance. The CG13 DES provides the best results among all the Choline Chloride-based DES used. Despite DES economic concerns, the experimental works show that they are potentially good candidates as water-based mud additives.
Process Safety Management in Oil and Gas Operating Units Through Digital Twin Platform: A Digital Approach for Safety Control and Process Intervention
Authors: Correa Otavio Carneiro , Mariano Jorge Seleme , Amaro Eduardo Pelanda , Santos Eduardo do Nascimento 
Published: October 2023

Abstract
Operational safety holds significant importance in the oil and gas industry, given the complex and high-risk nature of its operations. Considering this complex challenge, this paper describes the development of an application through a cloud-based platform that integrates the operation and maintenance phases of industrial plants through a Digital Twin for the management of risk in Oil and Gas operating units. The platform integrates project data as well as process documentation on the digital twin database, providing a systematic overview of risk analysis, safety control, and management of the operating units.
By creating an integrated database, operators can access information, models, and processes, and perform simulations through web access and mobile. For the Process Safety application on an FPSO (Floating Production Storage & Offloading), information from risk analyses was extracted through OCR, Regular Expressions, and then contextualized and linked to the 3D model. To implement the solution, it was created an integrated system based on protocols for consuming and updating data, documents, and models involved. This includes a middleware for 3D engineering models and a document integrator for risk analysis processes, along with a dynamic visual representation of the sequencing of actions when process intervention is required.
The solution presented in this paper offers valuable recommendations and evidence to support interventions and audits. Furthermore, it centralizes access to engineering information, significantly reducing industry professionals’ time spent searching and validating data across different operating systems, leading to a reduction of up to 75%. The system also generates simulated dynamic visual representation in the digital environment to showcase the sequencing of actions required during interventions in the process. This approach has led to an expected improvement in the recordable incident rate and a significant reduction in the time required to plan shutdowns and turnarounds. Overall, the platform's efficacy is demonstrated through its ability to streamline processes and enhance safety protocols.
Maintaining the Integrity of Wellhead Components Using a Polymeric Compound
Authors: Alramadan F. B. , Aljuryyed N. W. , Alissa F. M. , AlJuaydi H. S. 
Published: October 2023

Abstract
This study presents an innovative approach to prevent wellhead equipment corrosion in the cellar by employing a composite gel of polyacrylamide (PAM) with sand to enhance mechanical strength. Experiments were conducted to investigate the effect of varying PAM-to-sand ratios on the composite gel's mechanical and corrosion inhibition capabilities. The mechanical properties, including stress and strain, were examined using a rheometer. The corrosion inhibition capability was evaluated using corrosion test coupons. The results showed a notable improvement in mechanical strength and corrosion resistance with the inclusion of PAM and sand. Among the tested ratios, a composite gel consisting of 10% PAM offered the optimal balance of mechanical strength and corrosion inhibition. This finding suggests that filling the cellar with a 10% PAM composite gel can significantly enhance the lifespan of wellhead equipment by effectively protecting it from corrosive agents. Further research will focus on optimizing the composite gel for improved performance and assessing long-term durability under real field conditions.
DAS VSP Using Hybrid Wireline Logging Cable in Deepwater Wells
Authors: Rossi T. B. , Martinez A. , Useche M. A. 
Published: October 2023

AbstractThis work reports the results of two Vertical Seismic Profiles (VSP) in deep-water deviated wells in Brazil, acquired using Distributed Acoustic Sensing (DAS) as part of a hybrid wireline cable.DAS is an efficient alternative to acquire VSP surveys, especially in costly offshore environments (Hartog, 2017; Martinez et al., 2018). DAS embedded in hybrid optical-electrical cables, which utilizes the wireline as seismic recording element and so it leverages any logging intervention in a well to become a seismic run. A Zero-offset or rig-source VSP survey acquired with this technology can be recorded in matter of minutes, as opposed to it taking over 24hrs to record similar data with conventional tools (i.e., geophones). DAS seismic profiles are acquired while maintaining the logging cable stationary, so that a number of shots of the seismic source are taken to form a stack.Two DAS VSP jobs are described herein. One was acquired while lowering a sonic-caliper logging tool, while another job was acquired during a sidewall coring tool. Both jobs were acquired in less than 30 minutes and 50 shots to produce a stack. Excellent quality DAS data was recorded in both wells. In one of the wells, a conventional checkshot with sparse spatial sampling was recorded to compare velocity profiles against DAS. In both cases traditional well seismic products such as time-depth pairs, interval velocities, sonic calibration, corridor stack and migrated image and Q factor when applicable were obtained. For this reason, DAS can be an effective replacement of VSP acquired with traditional geophone methods in certain situations.The jobs here were the first deep-water, deep-target wells acquired successfully in the world with the technology of DAS in hybrid wireline cable.There were significant cost savings associated to the VSP operations using DAS, that came from reducing the rig time needed for their acquisition. A direct benefit of this technology is the reduction of the environmental footprint by both lowering noise emissions that disrupt marine ecosystems and, also carbon emissions that can be cut more than 90% over traditional VSP acquisition methods.
Offshore Wind Power: Using Existing Geo-Data to Derisk Offshore Wind Energy Development and Infrastructure Investment Decisions
Authors: Smith Jason , Rovang Kathryn , Signorelli Natalia , Chatten John 
Published: October 2023

AbstractOffshore desk studies play an important role in providing early insights into site conditions and engineering constraints within an offshore area of interest. However, traditional approaches to producing reports with supporting interpretation through static images and charts have limitations that hinder stakeholders from extracting new information through digital tools and data analytics. In the early stages of development considerations, asset concepts, and business requirements often evolve and change rapidly, necessitating a more dynamic and modern approach to data analysis.As the demand for renewable energy sources, including wind power in Brazil, continues to rise, effective planning strategies are required to optimize the placement and installation of offshore wind farms. Integrating diverse datasets, such as wind resource output, geological conditions, engineering constraints, and anthropogenic features, is essential to gain early insights and make informed decisions. In this context, utilizing a modern cloud-based data platform and harnessing the power of data analytics can significantly enhance the planning process.This paper emphasizes the importance of using a modern, cloud-based data platform to integrate existing (e.g., publicly available, or previously collected) and historical (e.g., initial or multi-year) datasets for early offshore infrastructure planning. Understanding wind resource output is a critical parameter in offshore wind development because it determines project economics; however, these early wind analyses are often decoupled from the ground-related conditions, resulting in inefficiencies in planning due to a lack of understanding of how these variations affect the development (i.e., seasonality). By leveraging a modern cloud-based data platform, all these disparate datasets can be efficiently integrated, stored, processed, and analyzed. Cloud-based solutions offer scalability and flexibility, enhancing the usefulness of data integrated from various sources. Furthermore, cloud platforms increase planning efficiency by providing a collaborative environment that facilitates interdisciplinary cooperation among stakeholders, including geoscientists, engineers, environmental experts, and regulators.The integration of data analytics techniques within the cloud-based platform brings added value to offshore infrastructure planning even at the earliest stages. Analytical algorithms, temporal modeling, and advanced tooling can uncover hidden patterns, correlations, and trends within the integrated datasets. The resulting information helps project owners identify potential infrastructure-related challenges. Several examples of advanced analytics from offshore Brazil are provided within the paper, showing how additional insights can be gleaned and concept planning can be expedited by utilizing a modern integrated approach to early site assessments.