CementingBasic(ForUTP)(ToPrint) Part1

7/29/2019 CementingBasic(ForUTP)(ToPrint) Part1

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This makes an interesting point... even if you were born to do a job, it doesn't necessarily mean thatyou're going to automatically do it safely... this reminds everyone that no matter how many times you'vedone a job before, be sure to think the whole thing through before you start.

You've carefully thought out all the angles. You've done it a thousand times. It comes naturally to you.You know what you're doing, its what you've been trained to do your whole life. Nothing could possibly gowrong, right ? ? ? Think again.



BASIC CEMENTING LESSON

An External Presentation Prepared for Universiti Teknologi Petronas

Adrian Pattinasarany



LESSON OBJECTIVES

At the end of the lesson, you should be able

to: Describe the principal functions of cement in

oil well

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s an escr e ma or proper es o acement slurry

Describe the additives used in the cementslurries and the way in which they affect the

properties of the slurry



CONTENTS

Introduction

Classification of CementProperties of Cement

Cement Additives

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Cementing Equipments

Cementing Procedure



INTRODUCTION TO CEMENTING

When an oil well is drilled, steel pipe

(casing) is put into the ground. Aguide shoe (a rounded, steel cover)is place in the end of the casingbeing placed in the hole to protectand guide the casing.

Common Definition of Cementing:

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e r mary emen ng rocess sthe process to fill the space thatremains between the casing and theformation (the annulus) with cementby pumping the cement slurrythrough the casing and back up the

annulus.



Four Primary Strings of Casing

Conductor

Surface

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Production



7

Reservoir



ConductorCasing

8

Reservoir



ConductorCasing

SurfaceCasing

Cement

9

Reservoir



ConductorCasing

SurfaceCasing

Cement

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n erme a e

Casing

Cement

Reservoir



ConductorCasing

SurfaceCasing

Cement

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n erme a e

Casing

ProductionCasing

Casing ShoeCement

Cement

Reservoir



ConductorCasing

SurfaceCasing

Cement

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n erme a e

Casing

ProductionLiner

Casing ShoeCement

Cement

Reservoir



• Cement supports the casing,

• Cement seals off formations

• Cement helps prevent blowouts by setting rapidly

• Cement protects the casing from the corrosiveeffects that formation fluids (as salt water) mayhave on it.

• Cement rotects casin from shock loads when

Functions of cement in oil well:

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drilling deep• Cement seals off formation areas that might allow

fluids to leak off (lost circulation or thief zones)

• Cement protects the environment by controlling the

flow of fluids• Cement can be used to plug an old well

(abandonment) or to plug a depleted zone



Two general classification of oil well cementing

are: Primary Cementing

Secondar or Remedial Cementin

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Primary Cementingor Casing Cementingis the cementingoperation performedimmediately after thecasing has been run

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downhole. The cementis then allowed to setbefore drilling isresumed or the well is

completed.



Liner is any string of casing

Other primary cementing: Liner Cementing

4A

1D

1C

B

C

G

H

I

K

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w e op o e s r ngbelow the surface of theground.

4B

1B

1A

A

D

E

F

J



Common Secondary Cementing jobs

Plug back cementing

• Hole is plugged by cement in orderto initiate a new drilling operation

• Plug back is carried out for a

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• Abandonment of the hole• Sidetracking the hole• Seal off lost circulation

• Shutting off of water or gasintrusion “Wet” Zone



Squeeze cementing

• Squeeze Cementing is the process of applying

hydraulic pressure to force or squeeze a cementslurry into the desired perforations, fractures,channels, or voids and force filtrate water from theslurry to create a solid mass which will harden to

Common Secondary Cementing jobs (cont’d)

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prov e t e es re sea .

• The operation is performed during drilling,completion and work over operations

• Main purpose of squeeze cementing :-• Supplementing a faulty primary cementing job• Repairing casing defects• Supplementing a faulty perforation job

• Reducing water cut in a producing well



ASTM (American Society for Testing and Materials) and API(American Petroleum Institute) standard procedures

Testing for construction cement According to ASTM C 150-99a - chemical composition

ASTM C1157-00 – performance criteria

CLASSIFICATION OF CEMENT

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Testing for oil well cement API Standards 10A , ISO Standard 10426-1- chemical composition and

performance criteria

HALLIBURTON, as a member, is involved in the committees that develop

these industry wide policies.



In Summary

FUNCTIONS OF OIL WELL CEMENT

PROPERTIES OF A CEMENT SLURRY

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ADDITIVES USED IN THE CEMENT

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