Casing design manual
This document, one of the Well Engineering and Production Operations (WEPO) technical control documents, contains the BG Group policies and standards to be adopted for well casing design. The objective is to ensure that there is a consistent approach to the safety critical aspects of casing design methodology throughout the BG Group.
Casing design is a stress analysis procedure to produce a pressure vessel, which can withstand a variety of external, internal, thermal and self weight loading. It is an integral and key part of the total well design process. The ideal casing design for any particular well, is one that is the most economic over the entire life of the well without compromising safety and the environment.
Completion technology for unconsolidated formations
The completion phase of well operations begins when drilling is completed, and ends when the well is brought on production. Typical completion operations include, but are not restricted to, perforating, placing gravel packs, acidizing, fracturing and setting production tubing and packers. The goal of these operations is to obtain a well which has a productivity that is not limited by the completion itself. While this sounds easy to accomplish, completion techniques are commonly used in many parts of the world that restrict the productivity of the well.
The purpose of this manual is to provide information on completion techniques for maximizing productivity and longevity of gravel packed wells. To achieve this purpose, the factors that can have a negative effect on the flow of fluids from a well should be understood. The nature of fluid flow towards a wellbore and a description of the potential restrictions to production are described.
casing design. Theory and practice
At a certain stage during the drilling of oil and gas wells. it becomes necessary to line the walls of a borehole with steel pipe which is called casing. Casing serves numerous purposes during the drilling and production history of oil and gas wells, these include:
- Keeping the hole open by preventing the weak format ions from collapsing. i.e., caving of the hole.
- Serving as a high strength flow conduit to surface for both drilling and production fluids.
- Protecting the freshwater-bearing formations from contamination by drilling and production fluids.
- Providing a suitable support for wellhead equipment and blowout preventers for controlling subsurface pressure. and for the iristallation of tubing and sulxurface equipment.
- Providing safe passage for running wireline equipment
- Allowing isolated comunication whit selectivrely perforated foriiiation(s) of interest.
Without adequate zonal isolation, wells are unlikely to reach their full producing potential. The ultimate goal of cementing is to provide well integrity through zonal isolation—a durable hydraulic seal in the wellbore that allows selective fluid production from subsurface formations and prevents leaks into other formations or to the surface. As production companies pursue reserves in high-cost, high-risk environments, well cementing and sustained wellbore integrity are increasingly critical to the success of the reservoir exploitation cycle.
Well cementing draws on several disciplines, including chemistry, mechanical engineering, fluid mechanics, mathematics, and geology. Industry experts in these disciplines have updated and expanded the classic 1990 text to create this comprehensive reference book, edited by Erik Nelson and Dominique Guillot, and published by Schlumberger. The book is intended for oilfield technical professionals as well as university students. Well Cementing, Second Edition, describes current cementing technologies in clear, detailed text liberally supported by full-color illustrations and photographs.
Well engineering and construction
Hence the emphasis will be placed on the practical utilisation of pore pressure in the well planning process. It is hoped that the ideas presented here will help the engineer to better understand lithological columns and deduce potential hole problems before producing a final well plan.
Knowledge of formation pressures is vital to the safe planning of a well. Accurate values of formation pressures are used to design safe mud weights to overcome fracturing the formation and prevent well kicks. The process of designing and selection of casing weights/grades is predominately dependent on the utilisation of accurate values of formation pressure. Cementing design, kick control, selection of wellhead and Xmas trees and even the rig rating are dependent on the formation pressures encountered in the well.
Petroleum well construction
Halliburton is pleased to contribute to this important volume addressing vital technologies of the petroleum industry. Well construction represents a formidable investment for our customers and we are committed to providing high-value solutions encompassing the entire spectrum of the field.
This work represents joint authorship by some of the finest experts in our organization and recognized experts from our client's organizations and other institutions. I am particularly grateful for the contributions of the editors, Profs. Michael J. Economides of Texas A&M University, Shari Dunn- Norman of the University of Missouri, Rolla and Larry Watters from Halliburton's Duncan Technology Center.
Every day, somewhere in the world, someone uses the Halliburton Cementing Tables, better known as the RedBook, to obtain technical data for calculations used in drilling and/or completing an oil or gas well. Over the decades, the RedBook has become part of Halliburton's rich heritage of service and, in the process, a collector's item as well.
It is estimated that over 850,000 copies of the printed Redbookhave been distributed during its 77 years in print, making it one of the most respected reference books in the oil patch.
Manual de completacion. Schlumberger
Después que un pozo ha sido completado, se debe completar adecuadamente Antes de ponerlo en producción. Una tecnología complicada se ha desarrollado Para estas técnicas y se ha desarrollado equipos para tal fin. La selección de este equipo y las técnicas aplicadas solo pueden ser posibles cubriendo todos puntos y mediante la Investigación de factores que son específicos del yacimiento y Estudio de la producción del pozo.
Offshore Blowouts. causes and control
Exploration and development of offshore oil and gas fields involve a number of risks related to loss of human lives, pollution, and loss of material assets. All those involved in the offshore industry are aware of the hazards. The potential for major accidents will always be present, but it is important to keep the risks within acceptable levels, and as low as reasonably practicable.
A main contributor to the total risk is uncontrolled release of pressurized hydrocarbons, i.e., gas leakages and blowouts. It should, however, not be forgotten that other aspects such as vessel stability, helicopter transport, and occupational accidents are also significant contributors to the total risk.
History shows that uncontrolled releases of hydrocarbons have caused several major accidents. The Bravo blowout on the Ekofisk field in 1977, the West Vanguard blowout in 1985, the Piper Alpha gas leak in 1988, and the Ocean Odyssey blowout in 1988 are all well-known accidents that occurred in the North Sea. In addition, several less severe accidents involving uncontrolled releases have occurred in the North Sea.