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Wellbore Stability

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Course Credit: 0.4 CEU, 4 PDH

Webinars Series on Wellbore Stability Topics:

Session I: Wellbore Stability – Keeping Wellbores Open

Session II: Unconventional Completions – Wellbore Completions and Fracturing

Session III: How to Strengthen and Stabilize the Wellbore During Drilling Operations – SPE Distinguished Lecturer

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 3 chapters

Course Chapters

  • 1Session I - Wellbore Stability - Keeping Wellbore Open
    Media Type: Video

    In spite of more than 20 years of advances in the application of geomechanical principles to improve understanding of its causes and improvements in drilling practices to reduce its effects, wellbore instability continues to be perhaps the largest single source of non-productive drilling time. These uncertainties arise largely because of lack of the appropriate rock properties data and information about the magnitudes and orientations of in situ stresses. This talk will briefly review the history of application of geomechanics to wellbore design, will discuss the sources of data required to reduce uncertainties, the ways in which to recognize the causes of instabilities to allow appropriate remediation, and the pros and cons of various models currently in use within the oilfield. Speaker: Daniel Moos Daniel Moos is one of four Baker Hughes Technology Fellows, jointly responsible for guiding technology development and for advising senior management on company-wide technical issues. He received his BS in Geology from Cornell University and his MS and PhD in Geophysics from Stanford University. Following graduation he helped to establish and manage logging services for the Ocean Drilling Program and sailed on several research cruises as a founding member of the Lamont-Doherty Borehole Research Group. He then re-joined the Stanford University Rock and Borehole Geophysics Project, an academic consortium supported by major oil and gas and energy services companies. He was a co-founder in 1996 of GeoMechanics International (GMI), which developed and applied geomechanical principles to solve oilfield, geothermal, and geotechnical site characterization problems. After the acquisition of GMI by Baker Hughes in 2008 he assumed the role of GMI Chief Scientist. He was elected a Baker Hughes Technology Fellow at the end of 2010. He has published extensively, provided consulting services and developed and taught courses in reservoir geomechanics, served on and co-chaired conference committees and acted as reviewer for professional journals, and holds patents on methods for in situ stress determination, wellbore imaging and acoustics, stimulation design and analysis, and flow properties of fractured reservoirs. He is a member of AAPG, AGU, SEG, SPWLA, EAGE, and ARMA.

  • 2Session II - Unconventional Completions - Wellbore Completions and Fracturing
    Media Type: Video

    This webinar discusses strategies for completing unconventional wells that require multistage hydraulic fracturing. This webinar defines completions as both the wellbore completion and the hydraulic fracturing. Participants will learn the different types of wellbore completion options as well as the hydraulic fracturing options and how they compare in different applications. This will include plug-and-perf, ball-activated systems, coiled tubing-activated systems, fracturing fluids, proppants, additives, and general fracturing theory and design. Speakers Sergey Kotov is the manager of the simulation, unconventional resources team, global marketing at Baker Hughes. He has over 17 years' experience in stimulation of oil and gas reservoirs. He started with Canadian Fracmaster Company as a well stimulation department interpreter in 1995. After the acquisition of the company by BJ Services in 1999, he developed his career as a filed stimulation/cementing engineer. He designed and implemented hydraulic fracture treatments in all major oil and gas fields in Russia from the South of the Arctic Circle. As an application engineer of BJ Services Technology Research Center, he participated in the development and optimization of new stimulation technologies and implemented field trials in the US. He also provided technology transfer both domestically and internationally. As a senior stimulation specialist, Kotov provided engineering support to BJ Services operations in North Africa (fracturing, acidizing, water control, and etc.). He developed the stimulation strategy for several fields in Algeria and Libya. Kotov holds a M.S. in petroleum engineering from North Caucasus State Technical University in Stavropol, Russia; and a M.A in linguistics from State Linguistic University, Pyatigorsk, Russia. W. Aaron Burton's career has been focused on the completion of shales and similar unconventional plays that require multistage hydraulic fracturing. Burton joined Baker Hughes as a field engineer trainee for completion tools after graduation in 2007. During his time in operations, he held the roles of field engineer, operations coordinator, and application engineer. He has completed wells in several unconventional plays in US Land, including the Bakken, Marcellus, and the Lower Huron and also installed two of the first ball-activated completion systems in China. Outside of operations he has been Product Line Strategist, Completions Manager for the Unconventional Resource Team, and Product Line Manager for unconventional multistage completions. These roles were focused on projects and products that would grow business in mature markets and in emerging markets. He also has a solid understanding of reservoir properties and stimulation design that are used in a data-driven approach to more effectively design completions in unconventional wells. He is also very active in the industry authoring and instructing on the subject of unconventional completions. He has authored and coauthored three SPE papers, and continues to teach two SPE continuing education courses. He has written a variety of other documents including magazine articles and newsletters, and taught numerous classes in many different venues to operators and service company personnel. Also, he has been a discussion leader, presenter, panelist, and participated in many other roles in industry events. Burton holds a BS in mechanical engineering from Mississippi State University.

  • 3Session III - How to Strengthen and Stabilize the Wellbore During Drilling Operations - SPE Distinguished Lecture
    Media Type: Video

    Loss of drilling fluid to the formation is one of the costliest problems that drillers face during well construction. Until recently, the primary method used to control losses involved incorporating materials in the fluid or in pills to bridge or plug the loss zone. Current technology enables a more comprehensive -- and more effective -- approach that includes this remediative method but gives greater emphasis to preventing lost circulation. This multi-element approach focuses on... Best drilling practices, including managed pressure drilling, casing/liner drilling and other techniques Optimizing hardware configurations Use of drilling fluids that inherently inhibit invasion into permeable or fractured zones Minimizing the fluid's equivalent circulating density Use of wellbore stability models that model rock and fracture mechanics more accurately "Strengthening" the wellbore Wellbore strengthening encompasses a wide variety of techniques that may be classified as physical, chemical, thermal, and mechanical. Physical techniques include methods to shield the formation from fluid and pressure through deposition of a barrier that behaves in some ways as casing. Chemical techniques involve changes in composition of the rock or pore fluid, thereby altering the fabric and mechanical properties of the rock. Thermal techniques involve increasing or decreasing the temperature of the wellbore by heating or cooling the drilling fluid at the surface. Finally, mechanical techniques involve pressure-stressing the wellbore through hoop stress enhancement (stress caging), to increase the apparent fracture gradient of the rock. By incorporating these technologies and the lost circulation prevention philosophy in the planning of the well and development of the drilling program, it is now possible and economical to drill wells that previously could not be drilled or that incurred unacceptable levels of non-productive time. Speaker Fred Growcock is currently serving as Global Fluids Specialist for Occidental Oil & Gas Corp (Oxy) in Houston, Texas, where he provides technical support to the company's worldwide drilling fluid field operations. He began his career as a scientist at Brookhaven and Oak Ridge National Laboratories in the mid-70's, working on coal liquefaction and gasification and nuclear reactor safety. He then moved to Dowell Schlumberger to develop acidizing corrosion inhibitors and foamed fracturing fluids. Subsequently, he joined Amoco Production Company to carry out drilling fluids R&D, and served as an adjunct professor of chemical engineering at the University of Oklahoma. In 1999 he moved to M-I SWACO, where he worked primarily on development of drilling fluid products and systems, then left in 2011 to join Oxy. Dr. Growcock holds Ph.D. and M.S. degrees in physical chemistry from New Mexico State University, and B.A. and B.S. degrees in chemistry from the University of Texas at Austin. He has written more than 100 papers and holds a dozen patents on corrosion inhibitors, drilling fluid systems, and completion fluid products

Credits

Earn credits by completing this course0.4 CEU credit4 PDH credits

Speakers

Khaqan Khan