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Lesson 2 Introduction to UBD - Introductionto...

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Introduction to  Introduction to  Underbalanced Drilling  Underbalanced Drilling  Technology Technology Lesson 2 Harold Vance Department of Petroleum Engineering
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Wellsite UBD Equipment Wellsite UBD Equipment Camp Geology Nitrogen Separator Mud Treatment Rotating Head UB operators Harold Vance Department of Petroleum Engineering
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UB Drilling - Jobs UB Drilling - Jobs Harold Vance Department of Petroleum Engineering
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Underbalanced Drilling in the  Underbalanced Drilling in the  United States United States YEAR 95 96 97 98 99 00 01 02 03 04 05 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000         T O T A L   U N B D E R B A L A N C E D   W E L L S  LOW  HIGH   Harold Vance Department of Petroleum Engineering
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Underbalanced Drilling Underbalanced Drilling Wells by Region Wells by Region Harold Vance Department of Petroleum Engineering
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Formation Pressure is  Equal to or Greater than  Circulating Pressure. Harold Vance Department of Petroleum Engineering UBD Definition UBD Definition
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Normally Pressured Reservoirs. Applications for normal to above normal  pressured reservoirs utilizing fluid systems in a  controlled flow (mudcap) drilling technique. Depleted Reservoirs. Where  a multi-phase circulating fluid is  necessary to achieve required Bottom Hole  Circulating Pressure (BHCP)- underbalanced or  with minimal overbalance.  UBD - Types UBD - Types Harold Vance Department of Petroleum Engineering
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Barriers to UB Drilling Barriers to UB Drilling Harold Vance Department of Petroleum Engineering
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Regulatory Barriers Regulatory Barriers to to Underbalance Drilling Underbalance Drilling The regulators  The regulators  need assurance  need assurance  and details. and details. Harold Vance Department of Petroleum Engineering
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Barriers To UB D&C Barriers To UB D&C Regulatory Regulatory Lack of standards. Lack of knowledge. Little statistical history. Concern about well control. Environmental questions . Harold Vance Department of Petroleum Engineering
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Operators Barriers Operators Barriers The operator  needs experience  and confidence. Harold Vance Department of Petroleum Engineering
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Operators Problems Operators Problems Unfamiliar with the system: Risk of the new. Lack of experienced people. Economics - Too expensive. Concern- liability.  Concern- well bore stability. Harold Vance Department of Petroleum Engineering
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Reasons For UB Growth Reasons For UB Growth There are driving      economic reasons . Harold Vance Department of Petroleum Engineering
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UBD Forecast by Region UBD Forecast by Region UBD Forecast by Region - 200 400 600 800 1,000 1,200 1996 1997 1998 1999 2000 2001 2002 Wells US Can Eur SoAm ME/Afr FE Harold Vance Department of Petroleum Engineering
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    Reasons For UB Growth Reasons For UB Growth Depleted reservoirs.
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