Petroleum Engineering 406 - PowerPoint PPT Presentation

Loading...

PPT – Petroleum Engineering 406 PowerPoint presentation | free to download - id: 592395-YjA2O



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Petroleum Engineering 406

Description:

Petroleum Engineering 406 Lesson 2 Well Control Read Well Control Manual Chapter 4-6 Homework 1 Due Jan. 1/28/04 Causes of Kicks - Tripping Failure to keep the hole ... – PowerPoint PPT presentation

Number of Views:50
Avg rating:3.0/5.0
Slides: 44
Provided by: jer485
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Petroleum Engineering 406


1
Petroleum Engineering 406
  • Lesson 2
  • Well Control

2
Read
  • Well Control Manual
  • Chapter 4-6
  • Homework 1 Due Jan. 1/28/04

3
Causes of Kicks - Tripping
  • Failure to keep the hole full

4
Causes of Kicks - Tripping
  • Swabbing

5
Causes of Kicks
  • Lost circulation

6
Causes of Kicks - Drilling
  • Insufficient density of drilling fluid
  • Drilling into Abnormal pressure

7
Causes of Kicks - Other
  • Annular flow after cement job
  • Lost control during DST
  • Drilling into adjacent wells
  • Drilling through (shallow) gas zones at excessive
    rates

8
Kick Warnings - Drilling
  • Drilling break
  • Increase in flow rate

9
Kick Warnings - Drilling
  • Pit gain

10
Kick Warnings - Drilling
  • Decrease in circulating pressure
  • Increase in pump rate
  • Well flows with pumps off

11
(No Transcript)
12
(No Transcript)
13
Kick Warnings - Tripping
  • Improper hole fill
  • DO NOT WAIT FOR PIT GAIN OR FOR THE WELL TO FLOW
  • What should you do if the well is not taking the
    proper fill on a trip?

14
Shut In Procedures - Drilling
  • Soft Shut In
  • Pick up the kelly until the tool joint clears the
    floor.
  • Shut down the pumps.
  • Check for flow.
  • If flowing, open the HCR valve.
  • Close BOP.
  • Close choke.
  • Hard Shut In
  • Pick up the kelly until the tool joint clears the
    floor.
  • Shut down the pumps.
  • Check for flow.
  • If flowing, Close BOP.
  • Open HCR valve.
  • Close choke.

15
Shut In Procedures - Drilling
  • Soft Shut In
  • Notify supervisors
  • Read record SIDPP, SICP, Pit Gain, Time, Date
  • Prepare to implement kill.
  • Hard Shut In
  • Notify supervisors
  • Read record SIDPP, SICP, Pit Gain, Time, Date
  • Prepare to implement kill.

16
Shut In Procedures - Tripping
  • 1. Set slips below top tool joint
  • 2. Stab a full opening safety valve and close
    it.
  • 3. Open the HCR and close the BOP, and choke
  • 4. Pick up and stab the kelly or a pump-in line

17
Shut In Procedures - Tripping
  • 5. Open the safety valve.
  • 6. Notify the supervisors.
  • 7. Read and record SIDPP, SICP, Pit gain, TVD of
    Well, TVD of bit, time, and date.
  • 8. Prepare to implement kill.

18
Shut In Procedures - Diverters
  • With diverters in use (prior to setting surface
    casing)
  • DO NOT SHUT IN WELL - DIVERT.

19
Shut In Procedures - Casing
  • 1. Lower casing until a swage and valve can be
    stabbed.
  • 2. Close the casing rams or annular preventer.
  • 3. Stab the swage and valve.
  • 4. Notify supervisor
  • 5. Read and record pressures
  • 6. Prepare to kill well

20
Well Kill Methods
  • Wait Weight method
  • Drillers method
  • Circulate weight
  • Concurrent method

21
Well Kill Methods
  • Reverse circulation
  • Dynamic kill
  • Bullheading
  • Lubricate and bleed
  • Volumetric

22
Constant BHP Well Control
23
Wait Weight Method
  • Weight up mud to KWM and complete kill sheet
  • Circulate KWM to bit following decline schedule
  • Circulate KWM back to surface maintaining FCP on
    drillpipe pressure

24
Wait Weight Method
7000
25
Wait Weight Method
  • When well is full of KWM, Shut in well
  • Check for remaining pressures
  • If surface pressures are zero, check for flow by
    cracking choke
  • If no flow, carefully open BOPs
  • Circulate around again

26
Wait Weight - Advantages
  • Kill well in one circulation
  • Least amount of maximum casing pressures

27
Drillers Method
  • Shut in well long enough to measured stabilized
    SI pressures
  • Circulate kick fluids from wellbore with original
    weight mud maintaining ICP on drillpipe
  • When kick fluids are circulated out, shut in well

28
Drillers Method
  • Weight up mud to KWM
  • Circulate KWM to bit following pressure decline
    schedule
  • Continue circulating KWM around maintaining FCP
    until KWM reaches surface
  • Shut well in, check for pressures, flow etc.

29
Drillers Method
30
Drillers Method - Advantages
  • Short shut in times
  • Easy

31
Circulate Weight
  • Shut in long enough to measure stabilized SI
    pressures
  • Begin circulating kick from wellbore with OWM at
    ICP
  • While circulating, isolate one pit and begin to
    weight up to KWM
  • When mud is weighted up, switch pump suction to
    weighted pit, and follow WW

32
Circulate Weight - Advantages
  • Best of WW and Drillers

33
Concurrent method
  • Weight up and circulate in increments
  • Takes one complete circulation for each increment

34
Reverse Circulation
  • Circulate down annulus and up the drillpipe or
    tubing.
  • Used extensively in workovers and completions

35
Dynamic Kill
  • For blowout control
  • Use high pump speeds and viscosities to generate
    high annular friction pressures
  • Annular friction used instead of surface choke
  • For shallow gas
  • Circulate as fast as rig pumps will allow through
    diverters
  • DO NOT HOLD ANY BACK PRESSURE

36
Bullheading
  • Pump kill fluid down wellbore, usually at
    relatively high speeds to force formation fluids
    back into formation
  • Used predominantly in
  • Workover and completion operations
  • Austin Chalk flow drilling
  • When danger of H2S

37
Lubricate Bleed
  • Only applicable with gas at the surface
  • Pump in KWM into wellbore
  • Let KWM fall for some time
  • Bleed off gas
  • Repeat

38
Volumetric Method
  • Used when circulation is not possible or when gas
    is migrating in closed in well
  • As surface pressures increase due to gas
    migration, bleed off excessive pressure and allow
    bubble to expand.
  • Continue until circulation can be resumed or
    until gas reaches surface

39
Use of Kill Sheet
  • Pre-recorded information
  • SPP
  • Pump output
  • Drillstring capacity
  • Annular capacity
  • Pressure limitations
  • Circulation times
  • Number of strokes

40
Use of Kill Sheet
  • Post kick information
  • SIDPP
  • SICP
  • Pit gain
  • Time
  • Date

41
Use of Kill Sheet
  • Calculate
  • KWM SIDPP/0.052/TVD OWM
  • ICP SPP SIDPP
  • FCP SPPKWM/OWM
  • Plot Pressure Decline Schedule

42
Kill Sheet
43
Kill Sheet
Plot ICP
Plot FCP
About PowerShow.com