PTA/RTA Module 2
For practitioners with at least six months PTA/RTA analysis experience
Self assessment pre-course test on the KAPPA website
- Five day course with additional day options
PTA/RTA Module 2
The PTA/RTA Module 2 course builds on the knowledge and experience
gained from the PTA/RTA Module 1 course by dealing with the advanced
functionality of the PTA module Saphir NL and RTA module Topaze NL and the
more complex aspects of analysis. Many examples are worked ‘hands on’
to illustrate the practical aspects of complex cases using the analytical
and numerical methods. In keeping with the effort to keep things as simple
as possible, but no simpler, problems are analysed at their simplest level
with layers of complexity added as demanded by the particular case.
Pre-requisites to attend the course
To attend the PTA/RTA Module 2 course it is essential you have attended the
PTA/RTA Module 1 or its equivalent and have at least six months
of ‘real world’ PTA and/or RTA experience. Without this experience it is
unlikely you will keep pace with the course.
To check that you are ready to attend the PTA/RTA Module 2 course please try
the self-assessment test. If you are
an experienced PTA/RTA engineer but are not familiar with Saphir NL and/or
Topaze NL we can arrange a free demonstration copy of the software to assist
you in your preparation prior to the course.
Please contact firstname.lastname@example.org for assistance.
The use of the software will be taught at an advanced level as part of
this course. It is essential that attendees have attained a good working
knowledge of Saphir NL and/or Topaze NL prior to registering for this course.
Using a real field case, a very brief review of user knowledge and a brief
revision of key principles to correct any misconceptions and to prepare our
indepth look at transient and production analysis tools. The session includes
the theory of diffusion, IARF and pseudo-steady state. The concept of the
Bourdet derivative including derivation, properties and limitations. Test design
and objectives, superposition in time and in space, sensitivity to input
parameters, radius of investigation. Transient analysis and where it sits
in relation to other reservoir engineering methods. Constant wellbore storage
and why it never is, skin components, standard interpretation models including
finite radius and fractured wells, dual porosity reservoirs and boundary effects.
This will also include a revision of the use of Saphir NL, with help on shortcuts
and advanced level functionality.
Advanced wellbore models
Well performance models and intake with examples.
Advanced well models
A detailed look and worked examples of difficult limited entry, multilayer
slanted, advanced horizontal, multilateral, numerical wiggly well, multi-frac
horizontal and horizontal anisotropy. This will include looking at the theoretical
derivation and response and comparing this to what happens in the real world.
A detailed look at the parameters affecting pressure behavior in horizontal wells
including low vertical permeability and partial horizontal drainage. The session will
include a number of real examples to illustrate the various issues.
Advanced reservoir models
Heterogeneous, composite reservoirs; their bad reputation and their real world use
illustrated with examples. Advanced 2Φ, 2κ, multi composite, anisotropy and multilayer
models stressing their complexity and the non-uniqueness of the solution.
Advanced boundary models
Complex boundary conditions and unconventional limits including constant pressure
boundaries, leaking, conductive and non-continuous faults handled with a common
sense approach. Finite reservoirs and material balance and the effect of
compressibility on reserve estimations. A discussion of the validity of radius
The principle and the use of the complete production and pressure history in
transient analysis, the use of the method for seeing deeper into the reservoir
coupled with the limitations and caveats of the method illustrated by worked
examples to help us define, question and verify the reservoir limits.
Developing a consistent workflow combining the G-function plot with derivatives
to define the leak-off behavior and the closure pressure. Including after
closure analysis (ACA).
Analytical and/or numerical?
Development of the workflow from the simple analytical case through to the
numerical case with increasing complexity. From 2D to 3D and multiphase using
increasing geological and petrophysical data.
PTA and/or RTA?
Comparing the information gained from looking at high resolution, high frequency
data (PTA) and low resolution low frequency data (RTA). Transient versus boundary
The multiphase problem. Aquifers and the choice and tuning of the model.
Non-Darcy flow. Heavy oil analysis, gas condensate, using the non-linear numerical model.
No public course planned
All courses are conducted in English unless otherwise notified.
To be announced
To be announced