Deepwater Directional Drilling in Soft Formations: Lessons Learned in West Africa Applied to Gulf of Mexico

2010 ◽  
Author(s):  
Olga Lucia Prieto ◽  
Graeme Symons ◽  
Nesny O. Pardo
Keyword(s):  
West Africa ◽  
Gulf Of Mexico ◽  
Lessons Learned ◽  
Directional Drilling

Pushing the Limits in Offshore Mexico

2021 ◽  
Author(s):  
Hector Hugo Vizcarra Marin ◽  
Alex Ngan ◽  
Roberto Pineda ◽  
Juan Carlos Gomez ◽  
Jose Antonio Becerra
Keyword(s):  
Gulf Of Mexico ◽  
Real Time ◽  
Lessons Learned ◽  
Clear Understanding ◽  
Directional Drilling ◽  
Case Histories ◽  
Control Plan ◽  
Drilling Performance ◽  
Drilling Parameters ◽  
Drilling Engineering

Abstract Given the increased demands on the production of hydrocarbons and cost-effectiveness for the Operator's development wells, the industry is challenged to continually explore new technology and methodology to improve drilling performance and operational efficiency. In this paper, two recent case histories showcase the technology, drilling engineering, and real-time optimization that resulted in record drilling times. The wells are located on shallow water in the Gulf of Mexico, with numerous drilling challenges, which typically resulted in significant Non-Productive Time (NPT). Through close collaboration with the Operator, early planning with a clear understanding of offset wells challenges, well plan that minimize drilling in the Upper Cretaceous "Brecha" Formation were formulated. The well plan was also designed to reduce the risk of stuck pipe while meeting the requirements to penetrate the geological targets laterally to increase the area of contact in the reservoir section. This project encapsulates the successful application of the latest Push-the-Bit Rotary Steerable System (RSS) with borehole enlargement technology through a proven drilling engineering process to optimize the drilling bottomhole assembly, bit selection, drilling parameters, and real-time monitoring & optimization The records drilling times in the two case histories can be replicated and further improved. A list of lessons learned and recommendations for the future wells are discussed. These include the well trajectory planning, directional drilling BHA optimization, directional control plan, drilling parameters to optimize hole cleaning, and downhole shocks & vibrations management during drilling and underreaming operation to increase the drilling performance ultimately. Also, it includes a proposed drilling blueprint to continually push the limit of incremental drilling performance through the use of RSS with hydraulics drilling reamers through the Jurassic-age formations in shallow waters, Gulf of Mexico.

scholarly journals Ebola Virus Epidemic in West Africa: Global Health Economic Challenges, Lessons Learned, and Policy Recommendations

2017 ◽  
Vol 13 ◽  
pp. 67-70 ◽  
Author(s):  
Mahmoud Elmahdawy ◽  
Gihan H. Elsisi ◽  
Joao Carapinha ◽  
Mohamed Lamorde ◽  
Abdulrazaq Habib ◽  
...  
Keyword(s):  
Health Economic ◽  
Global Health ◽  
West Africa ◽  
Ebola Virus ◽  
Lessons Learned ◽  
Policy Recommendations

Lessons learned from data-limited evaluations of data-rich reef fish species in the Gulf of Mexico: implications for providing fisheries management advice for data-poor stocks

2019 ◽  
Vol 76 (9) ◽  
pp. 1624-1639 ◽  
Author(s):  
Skyler R. Sagarese ◽  
William J. Harford ◽  
John F. Walter ◽  
Meaghan D. Bryan ◽  
J. Jeffery Isely ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Reef Fish ◽  
Fish Species ◽  
Stock Assessment ◽  
Lessons Learned ◽  
Management Objectives ◽  
Trade Offs ◽  
Data Limitations ◽  
Management Procedures ◽  
Reef Fish Species

Specifying annual catch limits for artisanal fisheries, low economic value stocks, or bycatch species is problematic due to data limitations. Many empirical management procedures (MPs) have been developed that provide catch advice based on achieving a stable catch or a historical target (i.e., instead of maximum sustainable yield). However, a thorough comparison of derived yield streams between empirical MPs and stock assessment models has not been explored. We first evaluate trade-offs in conservation and yield metrics for data-limited approaches through management strategy evaluation (MSE) of seven data-rich reef fish species in the Gulf of Mexico. We then apply data-limited approaches for each species and compare how catch advice differs from current age-based assessment models. MSEs identified empirical MPs (e.g., using relative abundance) as a compromise between data requirements and the ability to consistently achieve management objectives (e.g., prevent overfishing). Catch advice differed greatly among data-limited approaches and current assessments, likely due to data inputs and assumptions. Adaptive MPs become clearly viable options that can achieve management objectives while incorporating auxiliary data beyond catch-only approaches.

scholarly journals The Ebola outbreak, 2013–2016: old lessons for new epidemics

2017 ◽  
Vol 372 (1721) ◽  
pp. 20160297 ◽  
Author(s):  
Cordelia E. M. Coltart ◽  
Benjamin Lindsey ◽  
Isaac Ghinai ◽  
Anne M. Johnson ◽  
David L. Heymann
Keyword(s):  
Decision Making ◽  
West Africa ◽  
Disease Control ◽  
Ebola Virus ◽  
Case Fatality ◽  
West African ◽  
Lessons Learned ◽  
Haemorrhagic Fever ◽  
Chronological Order ◽  
Epidemiological Parameters

Ebola virus causes a severe haemorrhagic fever in humans with high case fatality and significant epidemic potential. The 2013–2016 outbreak in West Africa was unprecedented in scale, being larger than all previous outbreaks combined, with 28 646 reported cases and 11 323 reported deaths. It was also unique in its geographical distribution and multicountry spread. It is vital that the lessons learned from the world's largest Ebola outbreak are not lost. This article aims to provide a detailed description of the evolution of the outbreak. We contextualize this outbreak in relation to previous Ebola outbreaks and outline the theories regarding its origins and emergence. The outbreak is described by country, in chronological order, including epidemiological parameters and implementation of outbreak containment strategies. We then summarize the factors that led to rapid and extensive propagation, as well as highlight the key successes, failures and lessons learned from this outbreak and the response. This article is part of the themed issue ‘The 2013–2016 West African Ebola epidemic: data, decision-making and disease control’.

Examples of Deep-Water Salt Tectonics from West Africa: Are They Analogs to the Deep-Water Salt-Cored Fold Belts of the Gulf of Mexico?

2001 ◽  
pp. 251-270 ◽  
Author(s):  
Gabor C. Tari ◽  
Paul R. Ashton ◽  
Katrina L. Coterill ◽  
Jim S. Molnar ◽  
Michael C. Sorgenfrei ◽  
...  
Keyword(s):  
West Africa ◽  
Gulf Of Mexico ◽  
Deep Water ◽  
Salt Tectonics ◽  
Fold Belts ◽  
Water Salt

scholarly journals Lessons learned while protecting wild chimpanzees in West Africa

2020 ◽  
Author(s):  
Christophe Boesch ◽  
Arnaud Gotanegre ◽  
Annika Hillers ◽  
Joseph Kouassi ◽  
Hedwige Boesch ◽  
...  
Keyword(s):  
West Africa ◽  
Lessons Learned

scholarly journals Lessons learned, challenges and outlooks for decision-making after a decade of experience monitoring the impact of indoor residual spraying in Benin, West Africa

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Martin C. Akogbéto ◽  
Fortuné Dagnon ◽  
Rock Aïkpon ◽  
Razaki Ossé ◽  
Albert S. Salako ◽  
...  
Keyword(s):  
Decision Making ◽  
West Africa ◽  
Indoor Residual Spraying ◽  
Lessons Learned ◽  
The Impact

COMBINING MODELING WITH RESPONSE IN POTENTIAL DEEP WELL BLOWOUT: LESSONS LEARNED FROM THUNDER HORSE1

2005 ◽  
Vol 2005 (1) ◽  
pp. 719-723 ◽  
Author(s):  
CJ Beegle-Krause ◽  
Walton (Tad) Lynch
Keyword(s):  
Missing Data ◽  
Natural Gas ◽  
Gulf Of Mexico ◽  
Oil And Gas ◽  
Health And Safety ◽  
Lessons Learned ◽  
Safety Issues ◽  
Deep Well ◽  
The Subject ◽  
Health And Safety Issues

ABSTRACT In May of 2003 a drilling riser break at a BP development well in 6015 feet (1875 m) of water in the Gulf of Mexico initiated a dialog between BP responders and NOAA/HAZMAT modelers about the potential consequences of a deep well blowout. Human health and safety issues were the key concern for BP responders, particularly those planning potential on water operations. Where might the gas surface? Would the natural gas (propane and methane) at the water's surface pose an explosion or asphyxiation hazard? Was there a potential for the gas bubbles to sink any of the response vessels? These discussions did not have as cut-and-dry answers as either BP or NOAA would have preferred. During the planning for BP's attempt to bring the well back into operation, the General NOAA Oil Modeling Environment (GNOME) with the Clarkson Deep Oil and Gas model (CDOG, Zheng et al 2003, Chen and Yapa 2003 and Yapa and Cheng 2004) were run. The data required for modeling a deep spill is more extensive then for a surface oil trajectory and was the subject of much discussion between BP responders and NOAA/HAZMAT. As a result, NOAA/HAZMAT created a data summary request sheet (Appendix 1) to guide the BP responders in what data was needed, and provided a point of discussion for implications of missing data.

Sign in / Sign up

Export Citation Format

Share Document