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Directive009

Directive 009: CasingCementing MinimumRequirements

July 1990

Effective June 17, 2013, the Energy Resources Conservation Board(ERCB) has been succeeded by the Alberta Energy Regulator (AER).

As part of this succession, the title pages of all existing ERCB directivesnow carry the new AER logo. However, no other changes have beenmade to the directives, and they continue to have references to theERCB. As new editions of the directives are issued, these referenceswill be changed.

Some phone numbers in the directives may no longer be valid. ContactAER Inquiries at 1-855-297-8311 or [email protected].

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Directive0

Casing Cementing MinimumRequirements

July 1990

Effective January 1, 2008, the Alberta Energy and Utilities Board (EUB)has been realigned into two separate regulatory bodies, the EnergyResources Conservation Board (ERCB), which regulates the energyindustry, and the Alberta Utilities Commission (AUC), which regulates

the utilities industry.

As part of this realignment, the title pages of all existing EUB directivesnow carry the new ERCB logo. However, no other changes have beenmade to the directives, and they continue to have references to EUB.As new editions of the directives are issued, these references will bechanged.

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ENERGY RESOURCES CONSERVATION BOARD

Directive 009: Casing Cementing Minimum Requirements

July 1990

Published by

Energy Resources Conservation Board640 5 Avenue SW

Calgary, Alberta

T2P 3G4

Telephone: 403-297-8311

Fax: 403-297-7040

[email protected]

Web site: www.ercb.ca
mailto:[email protected]://www.ercb.ca/http://www.ercb.ca/mailto:[email protected]

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ALBERTA ENERGY AND UTILITIES BOARD

Guide 9: Casing Cementing Minimum Requirements

July 1990

Published by

Alberta Energy and Utilities Board640 5 Avenue SW

Calgary, Alberta

T2P 3G4

Telephone: (403) 297-8311

Fax: (403) 297-7040

Web site: www.eub.gov.ab.ca

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u

asing

ementing

Minimum Requirements

lberta

Energy and

Utilities oard

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. .

' -

.

asing ementing

Minimum Requirements

Important Message

The

EUB is updating

publications

that

pre-dated

the

amalgamation of the Energy Resources Conservation Board

(ERCB) and

the

Public Utilities Board (PUB) in 1995.

The

Alberta Energy

and

Utilities

Board (EUB) takes the

place

of

any references to the

ERCB, PUB,

or their full names.

Major revisions

to EUB documents are

occurring

as part of

regulatory

re-engineering and streamlining initiatives.

In

some cases, older publications

are

withdrawn or integrated

into new ones.

his

document

has not yet

gone through the

revision process. Please

consult

the

latest

Acts

and

Regulations to interpret and apply legal requirements.

To find

out

a

current contact

name

for

this

publication,

please call 297-8311.

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ENERGY RESOURCES

CONSERVATION BOARD

GUIDE

SERIES

July

1990

Edition

Published by

Energy

Resources Conservation

Board

640 Fifth Avenue W

Calgary Alberta

T2P G4

Telephone 403) 297-8311

Facsimile

403)

297-7040

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CONTENTS

Page No

1

INTRODUCTION

1

2

THE

REGUL TIONS

3

3

CEMENTING REQUIREMENTS 5

3.1

Conductor Pipe

5

3.2 Surface

Casing

5

3.3 product ion

Intermediate

and Liner

casing

5

4

SPECIAL

CEMENTS

7

4.1

Foam

Cement

7

4.2 Thermal Cement

7

5

METHOD OF DETERMINING

REQUIRED

CEMENT

TOP

TT CHMENT

1

Map of

Required Cement

Tops

TT CHMENT

2

Example Cement Report

Form

9

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INTRODU TION

The purpose

of t i s guide

i s

to outline casing cementing

requirements

in

accordance

with

sections

6080

and

6 090

of

the

oi l

and Gas

Conservation

Regulations

This

guide:

o quotes

the

relevant sections of the

regulations;

o outlines the method for determining the required

cement tops

when

cementing

casing;

o outlines

cementing requirements for casing;

o

outlines

Board

requirements

for the

use

of

special

cements such as

foam

and thermal cements
http://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdf

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3

2 THE REGULATIONS

The regulat ions governing the

cementing

of

casing

for wells

in Alberta are

the

oil and

Gas

Conservation

Regulations ,

sections

6.080(4)

and

(6)

and

6.090,

as

quoted

below.

2.1 section

6.080

(4) Where the

required

surface casing se t t ing depth

i s

less

than

(a) 180

metres,

or

(b) 25 metres below any aquifer which is a

source of useable water

the

casing

s t r ing

next

to

the

surface casing

shal l

be

cemented

ful l

length.

NOTE: The in tent

of

section 6.080(4) above i s

to

ensure the

protection

of

useable groundwater by the adequate cementing

of production

and/or intermediate

casing in l ieu of the

requirement to se t deeper surface casing.

11 6) The l icensee

shall ensure that surface

casing i s

cemented ful l length from the depth

prescribed

by

the

Board

before

any

r i l l ing i s commenced more

than 10 metres beyond the prescribed set t ing

depth.

2.2

section

6.090

The

Licensee shall cement

casing

as

prescribed by

the

Board's Guide G-9, Casing Cementing - Minimum

Requirements, as amended from

time

to time, unless

the Board,

(a) exempts the

Licensee

from the

requirements, or

(b)

prescribes

another

method

for

cementing the casing for a par t icular

well

or area.
http://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdfhttp://www.eub.ca/docs/requirements/actsregs/ogc_reg_151_71_ogcr.pdf

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5

3 CEMENTING REQUIREMENTS

The l icensee i s responsible for the

satisfactory

cementing

of casing,

as

required by the

oi l and

Gas Conservation

Regulations.

These

requirements

are

summarized

below:

3.1

Conductor pipe

where required for well

control)

a) The conductor

pipe

shall be cemented ful l

length

by

the

circulat ion

method.

b)

I f the

cement job

fa i l s

to

retain i t s

integri ty,

then dri l l ing shall be suspended and

remedial

action

undertaken.

c) The

hole

diameter shall be a t leas t 100 ro larger

than

the

diameter

of the pipe.

3.2 Surface

casing

a) Surface

casing shall

be

cemented

ful l

length.

b) I f cement returns are not obtained a t surface

or

the cement level in the annulus drops, then the

cement top shall

be determined and

the appropriate

ERCB Area Office contacted to discuss

remedial

action.

c)

i l lers

or additives

tha t

reduce

the

compressive

strength

shall not

be used

in the cement.

d) Surface casing shall be

adequately

centralized

a t

the

top

and

bottom and

a t 50-metre

intervals .

3.3

Production, Intermediate,

and

Liner

Casing

a)

Cement shall

not

be pumped down the

annulus

from

surface

unless

approved by a Board

representative.

b) The minimum cement top shall be determined

as

outlined

in

section 5 of th is guide.

c)

The

required

cement volume shall be based

on

hole-size measurements, taken from a cal iper

log,

plus a minimum

of

20

per

cent excess.

n

exemption

from the 20

per

cent excess requirement may be

granted upon application.

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6

d)

e)

The use of f i l l e r s and/or additives

to

the cement

system is acceptable only i f the

compressive

strength

of the

mixture i s

a t leas t

3500 kPa af ter

curing

for 8

hours

a t the

temperature of the

uppermost hydrocarbon bearing zone.

The

temperature

of the

zone

referred

to

in

item

d)

should be calculated

using

a

surface

temperature of

4.4C

and

a 2.7C/100 m

temperature

gradient where

the actual

temperature

i s unknown.

f) stage cementing programs,

which

will resul t in an

open-hole

uncemented)

interval behind casing,

shal l

be approved by a

Board

representative.

g)

Liners

shal l be cemented ful l

length.

h) During the cementing operation, flow

returns

shal l

be

visually

monitored. f

cement

returns are not

obtained

a t

surface

when cementing ful l length,

or

i f

displaced

dri l l ing f luid returns indicate tha t

the

required

cement top may not have been obtained,

a cement-top locating

log shall

be run. The log

and

a proposed remedial

cementing

program

shal l

be

submitted to the

Board

within

60 days of

r ig

release, or

prior

to commencement of completion

operations.

i) Full detai l s of the cementing operation

shal l

be

recorded and submitted

to the

Board

ei ther

on the

tour reports

or

on a

casing cement report simi

l i a r

to

the

example

in the

Attachment 2.

j) The casing shal l

be

adequately centralized. On

intermediate and production casing, central izers

shal l

be placed a t the top and bottom

of

a l l

productive formations and a t

50-metre

intervals

to

the required cement

top.

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9

5 METHOD OF DETERMINING REQUIRED

CEMENT

TOP

In order to determine the required cement top

in

a given

area

refer

to the Map

of Alberta (Attachment

1) and

follow

the steps outlined

below.

(a) In

al l cases

i f less

than

180

metres

of surface

casing

has been

run,

or

casing is not set

more than

25 metres below any aquifer which contains

useable

water,

.the

intermediate or production casing

shal l

be

cemented ful l length. This requirement will take

precedence over the required cement top in the map

(Attachment 1) or on the licence.

(b) Refer to the map, which identif ies the required

cement

tops

by

township, range, and meridian.

(c)

Using the

example of:

Township: 36, Range: 24,

west

of the 4th

Meridian,

the required cement top

i s

100

metres

above the

top of

the

viking and/or

any

shallower potential

hydrocarbon-bearing zone .

(d)

Should the

township

and range

be blank,

then the

appropriate ERC Area

Office shall

be

contacted

af ter

the

well

has

been

dril led

and

evaluated

to

obtain

approval of the l icensee 's

proposed

cement

top.

(e) The cement top requirements shown on the map are

subject to change, and prior i ty shall be

given to

requirements

specified on the well l icence,

or

by a

Board representative.

(f) Requests for a

relaxation

or change in

the required

cement top will not

normally

be considered

prior

to

the dri l l ing and evaluation of a well; however

provided

good offset data exists , requests will be

evaluated, but

may

not

be

granted.

g)

All

requests must be supported

by log or sample

interpretation, or other

data

from

offset wells

or

the

well

being

dri l led.

These

requests should be

directed to the appropriate ERC Area Office as far

in advance

of

the

cementing operation as possible.

f

log

evaluation

indicates

a shallower

hydrocarbon-bearing zone than the required cement

top, t shall be

covered

and the Board notif ied

accordingly.

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ATTACHMENT

2

C SING ND CEMENTING REPOR

lI

..

E I YR

I

0

ITol

TUlE

I YR

I

0

I

WElLIWIE (COI.lPLMJ

UNIQUE

LD.

LE

t.SD

SEC

1WP ReE

W

-

UCENCEE AGENT UCENCE NO.

-

w

3:

UCENCEE

REP

COmRACTOR NlD RIC NO.

.

BIT

SIZE

AVf:1I}I; HOLE SIZE

(CAlJPER)

lOYAL.

DEPTH

m

1

KELLY

BUSHINC

mm

mm

0

CDIENT lOP RQU1REIIENT

I REQUIRED CDIENT

\IOLUU

1110100 lYPE NlD DENSITY

m

3

SIZE

INTERVAL.

UNEAR

c.\SWC

CONNECI1ON

NUIoIl ER

COWENIS

(mm)

m)

DENSnY.

GRIDE

TYPE

OF .IOCNl S

(NEW ? USED

1

CI IS

CASING

M;

PER

UCENCE OR APPRfNAL.

1

IF

NOT,

YMf

1

z

Fl.CI.t.T COLINl MAKE

SF:r1J

SItO IoIAKE

I T AT

m

CENTRAIJZERS -

NO.

AND

DEPTH ST IJ

SCRAlCHEIIS -

NO.

AND

DEPTH ST AT

CASING

REC1PROCA IED

1

J OTAm)

1

STAGE

TOOL -

MAKE/DEPTH

m I TAGE

NO.

1

m

I

TAG

NO.

2

mTD

mTD

m

COIENl1NG

COIIPANY

OPERATOR

TYPE

IDDITMS

TDIH:s YOLLJUE

DENSI1Y

IIIX WAlER 1HEORETICAL 1NlERVAL.

et)

m

3

)

(Iog/m

3

)

emJ)

em)

CI

z

;:::

z

UJ

PREfUJSH VOWIoIE TYPE

I

STNn'

I

FINISH

loll)(

CDIENT

YCLIJUE

I

START

I

fINISH

:l:

w

I I

m

3

I

tJ

I

DISPI.ACEI.IENT VOW ..

E lYPE

I

START

I

fINISH PWC DOWN PftESSURE

I l1IoIE

I

I I

IcPo I

ClRCULAllNC

PRESSURES

Fl.CI.t.T

HElD

1

kPc

kPc

kPc

GOOD

RETURNS

lIiROUGHOUT JOB?

CflIENT REI\JItNS ?

AIoIQUNT m

3

1

FALLBACK

I

SAIoIPLES

TAKEN ?

SNoIPLES SET UP ?

:

CO

.....

ans _____________________________________________________________________________________________

_____________________________________________________________ ~ R E P __________________ __

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