Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00Ref. No. PT/2, Version 1.1 Date of issue 1 / 6 / 00

Introduction11

Time

Cum

mul

ativ

e In

com

e st

ream

/$

Time

Exploration/Delineation

Project BuildPhase and

Drilling

Initial Operating Phase

Completion and Production

Optimisation

InterventionArtificial Lift

Plateau Production

and Field LifeExtension

/$

Cum

mul

ativ

e In

vest

men

t/ C

ost P

rofil

e Abandonment

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Time-Year

Pre

ssur

e

Oil

Pro

d (1

000)

OilProdRate

G.O

.R

Pressure

G.O.R

00 0

1 2 3 4 5 6 7

BSW %20

10

Gas Breakthrough

5

10

250

500

2500

5000

Time-Year

ReservoirPressure

ReservoirPressure

OilProd

OilProd

G.O.R

G.O.R

Reservoir Production Concepts22

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Oil Production Rate

Bot

tom

hole

Flo

win

g P

ress

ure

Pe

PWF IPR

2.875"2.5"

4"

Q

yyyyyy

yyyyyyyyyyyyyy

yyy

yyyyyyyyyyyy

hPePwf P

rre

rw

WELL

Performance of Flowing Wells33

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Left - HandScrew Head

Inner Mandrel

Friction Blocks

Upper Seal

Sealing Element

Bypass

Upper Cone

Lower Cone

Upper Split Nut

Lower Split Nut

Slips

Wellbore Completion Concepts44

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Locking Screw

Top Sub

Coller

Steel Shearpin

Key Retainer

Spring

Standard Key

Self-ReleasingProfileLower Key Retainer

Body

Sheave Guard

Sheave Wheel

Oil Reservoir

Gland Nut

Top Gland

Packing

Bottom Gland

Internal B.O.P.

Internal B.O.P. Retainer

Swivel Bearings

Pressure Relief Valve

Quick Union

Wireline Services55

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Xmas tree

Adaptor spoolTubing hanger

Compact spool

Spacer spool to compensatefor abence of 7" / 7 5/8"tie break

9 5/8" casing hanger

13 3/8" casing hanger

20" casing head housing

36" conductor

20"13 3/89 5/8

Production tubing

Completion Equipment66

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Multiple Zone Completions77

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Grams of Explosive18 - 21

9 - 15

16

54

50

80 Gms.80

80

26

35

36

19

150 13.8"

37

2 3 4 5 61

1

2

3

4

5

6

7

8

9

10

11 100

5 584143

583

123

142

181

11161

38

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

Gun Diameter (inches)

Ent

ranc

e H

ole

(ten

ths

- in

ches

)

Pen

etra

tion

(inch

es)

OpenPerforation

Radial extent of consolidation

Berea sandstone core

Significantly reduced permeability, this region and inward

Intense fracturing, debris, quartz and carbonatefines. Assumed low flow resistance

Significant grain fracturing: original grain-to-grain contacts remain intact. Low permeability, diminishing radially

Significant grain fracturing: grain separation parallel to perforation axis. Assumed low flow resistance

0

1.375

0.75

0.50

0.300.20

1 2 3Linear Distance, (Inches)

Rad

ial D

ista

nce,

(In

ches

)

88Perforating

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Net

Pre

sent

Val

ue

Discount RateNPV Profile for Comparing Projects

IRR 1 IRR 2

Project 1

Project 2

Return on Investement = B/A

Cum

ulat

ive

Cas

h F

low

PaybackPeriod

A Time

B

+ve

-ve

Well Intervention1010

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Option 2

PHASE 3

TubingLandoff/Space Out

LocatePolishedBore Receptacle

Pull Back TubingTo Allow Space Out

Run Back With SSSVWithout Control Lineand Tubing Hanger

Locate Seals WithinPolished Bore

Land Off Tubing Hangerin THS to Achieve theRequired Seal LengthMovement Capacity

Go To CompletionFinal Testing

Circulate Whilst Lowering Final Tubing Joints

- Observe Pressure Increase

Mark Tubing On Drill Floor

To SSSV if Control LineNot Attached

To Adequate Depth toAdjust Tubing Length

Completion Installation Practices, Procedures and Programming 99

Ref. No. PT/1, Version 1.1 Date of issue 7 / 9 / 00

Examination and Model Solutions

SolutionSolutionSolutionSolutionSolution Part IPart IPart IPart IPart I

(1) Based on a PI of 6 STB/d/psi and a static reservoir pressure of

3700psi, draw the IPR as a straight line through the points.

(a) q = 0 Pwf = Pi = 3700

(b) q = 6000 STB/d at Pwf = 2700psi

(2) Based upon a THP of 200 psi, calculate the bottomhole flowing

pressures from the gradient curves supplied.

1000 200 2000 7000 9000 26502000 200 1850 7000 8850 26503000 200 1750 7000 8750 26504000 200 1600 7000 8600 26806000 200 1350 7000 8350 27008000 200 1200 7000 8200 2780

qoSTB/d

Pthpsi

DepthEquivFt

ActualDepthFt

TotalEquivDepthFt

Pwfpsi

Plot pwf versus qo to obtain the tubing performance curve

TPR

TPR4000

4000

3000

3000

2000

2000

1000

1000 8000 9000700060005000

3100

S = + 10

S = + 5 IPR s = 0

IPR s = 0

Qo

Pwfpsi

yyyyyyyyyyyyyyyy

Date:

1. Complete the sections above but do not seal until the examination is finished.

2. Insert in box on right the numbers of the questions attempted.

3. Start each question on a new page.

4. Rough working should be confined to left hand pages.

5. This book must be handed in entire with the top corner sealed.

6. Additional books must bear the name of the candidate, be sealed and be affixed to the first book by means of a tag provided

Subject:

INSTRUCTIONS TO CANDIDATES

8 Pages

PLEASE READ EXAMINATION REGULATIONS ON BACK COVER

No. Mk.

NAM

E:REGISTRATION N

O.:

COURSE:

YEAR:

SIGNATURE:Complete this section but do not

seal until the examination

is finished