1 / 31

PETE 406 - Underbalanced Drilling, UBD

Harold Vance Department of Petroleum Engineering. Introduction. What is UBDWhy drill underbalancedTechniques and LimitationsHistorical perspectives. Harold Vance Department of Petroleum Engineering. Text.

kamaria
Download Presentation

PETE 406 - Underbalanced Drilling, UBD

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. PETE 406 - Underbalanced Drilling, UBD Lesson 8 Introduction Underbalanced Drilling Manual, UDM: Chapter 1

    2. Harold Vance Department of Petroleum Engineering Introduction What is UBD Why drill underbalanced Techniques and Limitations Historical perspectives

    3. Harold Vance Department of Petroleum Engineering Text “Underbalanced Drilling Manual”, Gas Research Institute, GRI, Chicago, 1997. Can be purchased online from the SPE ($61.50 for members), IADC, and other Petroleum publishing companies May be able to get it at the TAMU bookstore

    4. Harold Vance Department of Petroleum Engineering References “A project Management Approach To Underbalanced Operations”, Signa Engineering Corp., Houston, 1998. “Mudlite Air/Mist/Foam Hydraulics Model”, Maurer Engineering Inc., Houston, 1988 Selected papers and texts

    5. Harold Vance Department of Petroleum Engineering What is UBD Wellbore pressures “intentionally” maintained below formation pressure in the open hole section. Formation fluids flow into the well.

    6. Harold Vance Department of Petroleum Engineering Additional Definitions Flow (Live) operations; wellbore pressures maintained below formation pressure and the well is intentionally allowed to flow during drilling or completion operations

    7. Harold Vance Department of Petroleum Engineering Additional Definitions, con’t Gasified Fluid Operations (aerated fluid operated) Operations intentionally undertaken with a two-phase drilling fluid containing some form of gas mixed with a liquid phase. Gasified fluids normally do not contain a surfactant

    8. Harold Vance Department of Petroleum Engineering Additional Definitions, con’t Foam Operations Operations intentionally undertaken with a two-phase drilling fluid containing some form of gas mixed with a liquid phase and tied together with a surfactant The liquid phase is continuous

    9. Harold Vance Department of Petroleum Engineering Additional Definitions, con’t Mist Operations Intentionally drilling with a two-phase fluid having a gas as the continuous phase The liquid in this fluid system is suspended in the mixture as droplets

    10. Harold Vance Department of Petroleum Engineering Additional Definitions, con’t Air Operations Intentionally drilling using a pure gas as the drilling fluid. The gas can be air, nitrogen, natural gas, or any combination of gases

    11. Harold Vance Department of Petroleum Engineering Additional Definitions, con’t Mudcap Operations Operations undertaken when the annular pressure during flow drilling exceeds the safe pressure limit of the rotating control element. Mudcap operations are not underbalanced operation, but often are a result of drilling underbalanced and employ many of the same techniques and equipment

    12. Harold Vance Department of Petroleum Engineering Additional Definitions, con’t Snubbing Operations An intentional operation that employs either a snubbing unit or coiled-tubing unit in order to operate at surface pressures that exceed the limits of rotating control elements such as rotating heads or rotating blowout preventers

    13. Harold Vance Department of Petroleum Engineering Additional Definitions, con’t Coiled-tubing drilling Use of a continuous-spool of pipe to drill with instead of the conventional jointed drillpipe. CT units were originally designed to operate on live wells with surface pressure, without the requirement that the well be “killed” prior to entering the wellbore.

    14. Harold Vance Department of Petroleum Engineering Historical perspectives UBD operations are as old as the drilling industry First wells were drilled with cable tool Cable tool drilling was underbalanced

    15. Harold Vance Department of Petroleum Engineering Historical perspectives In 1866 a patent for air drilling was issued First recorded use of a gasified fluid was in West Texas in 1932

    16. Harold Vance Department of Petroleum Engineering Historical perspectives In 1938 mist was used by The Texas Company to drill in California. Natural gas was continuous phase and oil was the liquid phase

    17. Harold Vance Department of Petroleum Engineering Historical perspectives Interest dropped off using gas as a drilling fluid until the 1950’s in: Canada West and Central Texas Utah San Juan Basin of New Mexico

    18. Harold Vance Department of Petroleum Engineering Historical perspectives

    19. Harold Vance Department of Petroleum Engineering Historical perspectives

    20. Harold Vance Department of Petroleum Engineering Historical perspectives

    21. Harold Vance Department of Petroleum Engineering Historical perspectives Until the mid 1980’s UBD was just a niche industry, and only utilized in certain areas around the world

    22. Harold Vance Department of Petroleum Engineering Historical perspectives

    23. Harold Vance Department of Petroleum Engineering

    24. Harold Vance Department of Petroleum Engineering

    25. Harold Vance Department of Petroleum Engineering More equipment development 1995 Varco-Shaffer introduced an RBOP with a rated to 3000 psi

    26. Harold Vance Department of Petroleum Engineering Closed loop system

    27. Harold Vance Department of Petroleum Engineering Nitrogen Generation System

    28. Harold Vance Department of Petroleum Engineering Electromagnetic MWD Tools

    29. Harold Vance Department of Petroleum Engineering Hollow Glass Spheres

    30. Harold Vance Department of Petroleum Engineering Factors leading to increased UBD Horizontal drilling Closed systems High-pressure rotating control devices Electromagnetic MWD systems HP HV compressors Increased availability of Nitrogen Better reservoir and rock strength analysis Improved Hydraulics analysis Percussion tools Ability to re-circulate fluids

    31. Harold Vance Department of Petroleum Engineering

    32. Harold Vance Department of Petroleum Engineering

More Related