Hpht wells classification

High Pressure High Temperature
Wells (HPHT)
Note #1
Mahmoud Abdelrazik
Offshore DSV and Technical Instructor for ADC
Contacts: +20 100 079 2174
m.abdelrazik6@gmail.com

Important to be updated
• Firstly I would like to thank you for electing the course for
#Every_day_note and wish you getting more knowledge, experience with
what we are going to say there.
• Following the post is very important for your question, and following what
others thinking about and sharing your experience along with others to
have the full image.
• If you will follow all notes, send me an email to m.abdelrazik6@gmail.com
to send you the updates if you don’t have time for linkedin.
HPHT - Note #1 Mahmoud Abdelrazik 2

Course Outlines (20 Points in 20 Days)
• We will continue delivering the other courses same way so, keep
updated.
• We will go through 3 points by 3 points and each 9 points will have 1
note of review so as to be refreshed with knowledge.
• That would be great opportunity for a final assessment for each 3
notes, you can solve, send to me to m.abdelrazik6@gmail.com for
yourself to make sure you got the knowledge understood.

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HPHT MPD ERD
HPHT MPD ERD
1st
2nd
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High Pressure High Temperature
• Note #1: Introduction
• What is the HPHT?
• HPHT Classification
• HPHT Considerations
• HPHT Mechanisms
• HPHT Challenges
• Well control
• Casing seat selection and casing design
• Drilling Fluid
• Cementing
• Material Selection including e.g. wellheads

What is The HPHT
• There are two definitions for HPHT:
• API Guideline 17 TR8:
• Maximum anticipated surface pressure greater than 15,000 psi and
flowing temperature greater than 350 deg F
• OR requirement for pressure control equipment PCE or well control
equipment with rating greater than 15,000 psi
• Health, Safety Executive UK
• Non distributed temperature > 300 deg F
• Pore pressure gradient > .8 psi/feet
• Pressure control equipment > 10,000 psi

What is The HPHT

HPHT Classification

HPHT Classification
In General

HPHT Worldwide Experiences
Falcao, 2007

HPHT Considerations
• Two Important
considerations for design
1.The margin
2. ECD’s (Effective
Circulating Density

HPHT Considerations
• Two Important considerations for design
1. The margin
2. ECD’s (Effective Circulating Density

HPHT Mechanisms
• Depositional Effect
• Diegetic Effect
• Tectonic Effects
• Structural Causes
• Thermodynamic Effects

HPHT Challenges
• Well control operation and
equipment
• Drilling fluid
• Cementing
• Material selection
• Wellhead
• Downhole tools reliability and
durability with high temperature
• Measurement reading accuracy
• Safety issues
• seals
• Others

HPHT Challenges

HPHT Challenges
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25
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45
Well Control Drilling Fluid Cementing Others
HPHT Challenges
HPHT Challenges

HPHT Well Control
• Well control incident in
normal pressure wells 4-5%
for each 20-25 wells
• HPHT wells incident
frequency 1-2 incident per
well (100-200%)
*** Worldwide statistics for N.S operating
companies
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Conventional HPHT
Chart Title
WC Incidents f Drilled Wells

End of Note #1 Definition of HPHT
• Later, we have about 19 notes
• 13 Notes for Well control
• 1 Note Rig equipment summary
• 1 Note Management of the operation
• 1 Note Samples of HPHT guidelines (HSG’s)
• 1 Note HPHT Drilling Fluid
• 1 Note HPHT Cementing
• 1 Note HPHT Standards
• Keep Following for the updates.

Thank you, and keep following
************
Next Note, Note 2; Gas behavior, kicks and control for
HPHT

Hpht wells classification

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