This course will be focusing on major areas of acid stimulation techniques and addresses both theoretical concepts and practical onsite experience. Acidizing with coiled tubing will also be discussed in detail, due to its importance in acid placement and formation treatments. The course starts by presenting the basic concepts for stimulation job design, execution and follow up. Discussion is carried out on formation damage and its effect on well performance and planning of acid stimulation treatments. Focus is given to the main causes of formation damage (damage during drilling, cementing, perforating, production and working over wells) and how these may be identified. The course also highlights the importance of well integrity and CT in stimulation operations.
Course Level: Skill Duration: 5 days Instructor: Antonio Abreu
Designed for you, if you are...
A petroleum engineer, production engineer, CT supervisor or operations supervisor
A manager wanting to get more familiarized with stimulation and CT
A reservoir engineer, petrophysicist or foreman connected with stimulation operations
How we build your confidence
The course will be presented using PowerPoint slides, some with animation and several videos on relevant issues.
Teaching methods include calculations on related issues.
Several examples of actual stimulation programs will be presented.
Questions related to the course content will be sent daily per email to the course attendants, who will answer by return e-mail (optional).
The benefits from attending
By the end of the course you will feel confident in your understanding of:
Introduction to stimulation operations
Formation damage mechanisms and their identification
Brainstorming on skin damage
Acid reactions and their selection for carbonates and sandstones
Acids and additives used in matrix stimulation
Candidate well selection
Acid treatment design
Acid placement and diverting technologies
Using coiled tubing for acid placement, displacement, and flow back
Laboratory tests
Acid fracturing design basics
HSE and acidizing operations
Safety & quality assurance
Well integrity principles
Coiled tubing and its importance in stimulation operations
Topics
Introduction to stimulation concepts and objectives
Introduction to acidizing
Acidizing of carbonates and sandstones
Acid fracking overview
Damage caused by well operations
Well candidate selection process (overview)
Why there are failures in acidizing?
Acid treatment design overview
Types of damage
Monitoring the acid backflow
HCL acid by-products
Capturing data, before, during and after the job
Acid reactions with OBM (Oil Base Mud)
Emulsions
Formation damage and other considerations
Formation damage mechanisms
Matrix acidizing
Types of Acid and Acid Formulations
Sandstone versus carbonate acidizing
Typical treatment execution
Fracture acidizing
Proppant fracturing versus fracturing
Economic impacts of well stimulation
Acid types / reactions / methods
Fluid injectivity on test core
Types of acid
Acid formulations
Organic acids
Acid dispersion
Viscosified acid
Acid emulsions
VES acid
VES-HCL: gelling and breaking
HCL reactions with carbonates
HCL / HF acids
Pressure Response, Post-Job Procedure
Acid reactions
Rates of reaction
Carbonate acidizing
Sandstone acidizing
Binary acids
Dissolving power of acids
Molecular weights
Treatment evaluation
Post-job procedure
Pressure response during acid treatment
On-site evaluation of treatment effectiveness
The Paccaloni technique
Sandstone acidizing using a protective Ion Agent (technique researched and developed in Oman)
The disadvantage of using HCL/HF
The concept behind this technique
On job charts for job monitoring
Recording of a stimulation job
Pressure build-up analysis before and after acidizing
Main components of a CT Equipment Package
Coiled Tubing Technologies for Successful Stimulation Jobs
No acidification without coiled tubing
Coiled tubing conveyance and intervention methods
Downhole well tractor
CT insertion and removal under pressure
High displacement rates in formation with good permeability without limitation from CT friction pressures