1a_overview of drilling engineering.pdf

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  • 1

    Well Drilling Engineering

    Overview of Rotary Drilling Dr. DO QUANG KHANH

  • Contents

    Introduction

    Drilling Team

    Steps to Drill a Well

    Drilling Rigs

    Offshore Drilling

    Drilling Cost Analysis (Drilling Economics)

    2

  • Fig: Role of drilling in field development

    Introduction:

    The life of an oil or gas field

    can be sub-divided into the

    following phases:

    Exploration Appraisal Development Maintenance Abandonment

  • Fig. 1.3 - Typical drilling rig organization

    Personnel involved in drilling a well

  • Fig. 1.4

    The

    rotary

    drilling

    process

  • Steps to Drill A Gas/Oil Well

    1. Complete or obtain seismic, log,

    scouting information or other data.

    2. Lease the land or obtain concession.

    3. Calculate reserves or estimate from best

    data available.

    4. If reserve estimates show payout,

    proceed with well.

    5. Obtain permits from conservation/

    national authority.

  • Steps to Drill a Well - contd

    6. Prepare drilling and completion

    program.

    7. Ask for bids on footage, day work, or

    combination from selected drilling

    contractors based on drilling

    program.

    8. If necessary, modify program to fit

    selected contractor equipment.

  • Steps to Drill a Well - contd

    9. Construct road, location/platforms and other marine equipment necessary for access to site.

    10. Gather all personnel concerned for meeting prior to commencing drilling

    (pre-spud meeting)

    11. If necessary, further modify program.

    12. Drill well.

  • Steps to Drill a Well - contd

    13. Move off contractor if workover unit

    is to complete the well.

    14. Complete well.

    15. Install surface facilities.

    16. Analysis of operations with

    concerned personnel.

  • Drilling Operations Field Engineers, Drilling Foremen

    A. Well planning prior to SPUD

    B. Monitor drilling operations

    C. After drilling, review drilling results and

    recommend future improvements

    - prepare report.

    D. General duties.

    What are the well requirements?

    Objectives, safety, cost

  • Making

    a

    Connection

    Making

    a

    Trip

  • Making a mouse hole connection

  • Making a mouse hole connection - contd

    Single

    Added.

    Ready to

    Drill

    Moving Kelly

    to Single in

    Mousehole

    Stabbing

    the Pipe

  • Use

    Elevators

    for

    tripping

    Making a trip

    Put Kelly in

    Rathole

    Why

    trip?

  • Making a trip - contd

    Tripping

    one stand

    at a time

    60-90 ft

  • Fig. 1.5

    Classification

    of rotary

    drilling rigs

  • Noble

    Drillings Cecil

    Forbes

    A Jack-

    Up Rig

  • Sonats George

    Washington

    A Semi-

    Submersible

    Rig

  • Zapatas Trader

    A

    Drillship

  • Deep Water Development Options

    SUBSEA

    COMPLET

    IONS

    FIXED

    PLATFO

    RMS COMPLI

    ANT

    TOWER

    S FLOATIN

    G

    PRODUC

    TION

    SYSTEM

    S

    TENSIO

    N LEG

    PLATFO

    RMS

  • TENSION LEG PLATFORM

  • Shells Auger

    Tension

    Leg

    Platform

  • Shells Bullwinkle

    Worlds tallest offshore

    structure

    1,353 water depth

    Production

    began in 1989

    45,000 b/d

    80MM scf/d