API SC 10, Work Group 13 Update:
Revision of 10 TR1, Cement Sheath
Evaluation
SC 10 WG 13
January 2017
Agenda: Wed, January 18th (2:00 PM – 2:30 PM)
1.
2.
3.
4.
WG Charge
WG Membership
10TR1 Table of Contents
Discussion on first draft of sections:
- Section 2 - Scope
- Section 3 - Framwork
- ii Objective of Evaluation, iii Methodology
- Section 5 Verification techniques
5. Next Steps
6. Adjourn
Work Group Charge:
Update 10TR1 Cement Sheath Evaluation:
• Include latest logging technology
• Include cement job execution data interpretation
• Include cement evaluation log data interpretation
• Include other evaluation techniques
WG Volunteers:
Gunnar DeBruijn (Schlumberger)
Glen Benge (Benge Consulting)
Erick Cunningham (BP)
Shailesh Dighe (Baker)
Alan Parlipiano (Hess)
Doug Patterson (Baker)
Glenn Donovan (Shell)
James Reid (Oxy)
Jerry Calvert
Additional volunteers?
Abe Vereide (BP)
Pavel Shaposhnikov (Schlumberger)
David Stiles (ExxonMobil)
Antonio Bottiglieri (Baker)
Joe Shine (Aramco),
Gary Frisch (Halliburton)
Dan Mueller (ConocoPhillips)
Luis Padilla (Chevron)
Table of Contents (first draft)
1. Introduction
2. Scope
3. Framework – Put Cement Sheath Evaluation in Perspective
i. Objective of the Cement Job
• Zonal Isolation
• Casing Support
ii. Objective of Evaluation
iii. Methodology – based on objective of cement job, evaluation
tools available
• Overall process flow
• Methodology for each evaluation dataset (lift pressure,
show test, acoustics, temperature
• Available data sets
…. Attached word document
Scope (first draft)
2.1 Scope
This technical report discusses methods and gives guidance for the evaluation of the cement sheath during installation and
after it has been installed in a well. It gives a framework for the evaluation of the cement sheath in the context of the
objectives of the cement job. Various verification techniques are discussed including surface indicators during the cement
job and post cement job evaluation techniques.
2.2 Conditions of Applicability (optional)
This technical report applies to cement sheath evaluation during the whole life cycle of the well.
In this context, the cement sheath may be evaluated soon after installation in the well. The cement sheath may be
evaluated during the operations phase of the well, and it may be evaluated during workover and abandonment operations.
2.3 Objective (optional)
The technical report objective is to help enhance confidence in cement sheath evaluation. Tools, techniques, and methods
of interpretation are included.
…. Attached word document
Framework (first draft)
3 Framework – Put Cement Sheath Evaluation in Perspective
i. Objective of the Cement Job
Zonal Isolation
Casing Support
ii. Objective of Evaluation
The objective of the evaluation is to determine if the objectives of the cement job have been met.
The objective(s) for the cement job has to be defined, typically in the drilling and / or cement program.
…. Attached word document
Framework (first draft)
3 Framework – Put Cement Sheath Evaluation in Perspective
iii. Methodology – based on objective of cement job, evaluation tools available
Overall process flow
Obtain cement program (including cementing objective)
Understand cement requirements that meets objectives.
Determine methods and / or measurements that can evaluate cement requirements with required
certainty
Determine expected values from measurements and methods for cement that meets the cement
requirements and objectives
Collect measurement data sets, including measurements before, during, and after the cement job
Compare measurements to expected values
Interpret the data and comparison (and understand limitations and certainty) of cement placement
Determine if cement meets requirements and cement job objectives is achieved
Determine if additional methods / measurements to improve certainty are required
Utilize additional evaluation methods as required
Methodology for each evaluation dataset (lift pressure, show test, acoustics, temperature
Methodology is to use the expected cement placement, compare each data set to the expected values in
that scenario.
Available data sets
Cement Program
Operational data from the cement job (Pressure, pump rate, density)
Representative cement lab tests
Representative mud test
…. Attached word document
Verification Techniques (first draft)
Verify design meets objectives (Lead: Glen)
The ultimate goal of cement evaluation will depend on the objective of the job. If the objective is to have pressure
isolation at a casing shoe for continued drilling, then the evaluation technique may simply consist of a pressure test. For
objectives requiring top of cement above a certain point in the well, then pressure matches using job data, temperature
surveys or sonic logs may be in order. Determining the presence of zonal isolation becomes one of the more difficult
tasks. Depending on the length of the interval requiring isolation, and the slurries pumped, the selection of evaluation
technique can become quite complex.
For proper cement design, the slurry, placement and ultimate objectives of the operation must be understood and agreed to
by all parties involved. This should include the drilling organization, reservoir, geology and completions groups. During
the initial discussions of the objectives, there may be conflicts and compromises. This process defines the operating
envelope for the cement job. For example, if the top of cement is desired a significant distance up the hole, but there is
little ECD available for placement of the cement, then a decision must be made to employ multi-stage cementing or use a
specialty cement system. If a specialty cement system, such as foam or one extended with high concentrations of
microspheres, is used, then it must be understood that these systems will not “show up” on some logs the same as more
conventional systems. The use of these slurries can dictate the use of a more sophisticated evaluation log or processing
technique.
Understanding the objectives of the job, and the design limitations that may be required to meet those objectives, a
decision can then be made as to how the job will be evaluated, the success criteria used to determine if the job has been
performed properly, and if the objectives were met. Performing the cement evaluation can be performed by techniques
including pressure analysis to determine top of cement, pressure testing of a casing shoe and sophisticated logs. Selecting
the evaluation methodology to match the objectives of the job is a cornerstone of proper cement evaluation.
…. Attached word document
Next Steps
- Continue to fill the document
- WG meeting in Houston
- Draft ready for summer meeting
Adjourn
Minutes
Minutes of the WG Session for the update to 10TR1, Jan 20, 2016 2pm
1. Reviewed the WG charge
Work Group Charge:
Update 10TR1 Cement Sheath Evaluation:
•
•
Include latest logging technology
•
Include cement job execution data interpretation
•
Include cement evaluation log data interpretation
•
Include other evaluation techniques
Moved by Rick Lukay, 2nd by Glen Benge - carried
2. Reviewed Work Group members and solicited members (included on membership slide)
3. Discussion about topics not currently in 10TR1: consider topics Formation collapse, formation/casing
interaction, and non-cementicious materials
4. Reviewed draft table of contents
comments: do not discuss remedial or zonal isolation
discussion on risk and reliability, should be linked back to objectives
Thank you for the useful discussion
5. Adjourned at 2:20 pm