API SC 10, Work Group 13 Update: Revision of 10 TR1, Cement Sheath Evaluation SC 10 WG 13 January 2017 1

Agenda: Wed, January 18th (2:00 PM – 2:30 PM) 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 Next Steps Adjourn

Update 10TR1 Cement Sheath Evaluation: 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 3

Additional volunteers? WG Volunteers: Gunnar DeBruijn (Schlumberger) Abe Vereide (BP) Glen Benge (Benge Consulting) Pavel Shaposhnikov (Schlumberger) Erick Cunningham (BP) David Stiles (ExxonMobil) Shailesh Dighe (Baker) Antonio Bottiglieri (Baker) Alan Parlipiano (Hess) Joe Shine (Aramco), Doug Patterson (Baker) Gary Frisch (Halliburton) Glenn Donovan (Shell) Dan Mueller (ConocoPhillips) James Reid (Oxy) Luis Padilla (Chevron) Jerry Calvert Additional volunteers?

Framework – Put Cement Sheath Evaluation in Perspective Table of Contents (first draft) Introduction Scope Framework – Put Cement Sheath Evaluation in Perspective Objective of the Cement Job Zonal Isolation Casing Support Objective of Evaluation 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

…. 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

…. 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

…. 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

…. 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

- Continue to fill the document - WG meeting in Houston 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