Multiphase RTA for Tight Unconventionals

Disciplines: Completions | Data Science and Engineering Analytics | Management | Production and Operations | Reservoir

Course Description

Two common goals of Rate Transient Analysis (RTA) are the quantification of early time well performance using the Linear Flow Parameter (LFP), as well as the contacted pore volume being drained (e.g. OOIP and OGIP). These two parameters are essential for understanding the effects of completions, geology, and depletion which then advises different strategies for optimizing the economics of future development.

We’ll cover the following topics in the course:

  1. RTA inputs:
    • Production data
    • PVT
    • Bottomhole pressures
  2. RTA What’s New?
    • Multiphase Flowing Material Balance (FMB)
    • Analytical & Numerical RTA
    • Classical vs. Fractional RTA
  3. Numerical reservoir simulation/modeling
  4. Example Cases & Exercises

Learning Level

Introductory to Intermediate

Course Length

1 day

Why Attend

This course outlines limitations in traditional RTA analysis, and goes through three new technologies that has been introduced the past few years to help enhance our understanding of tight unconventionals, namely (1) Numerical RTA (2) multiphase flowing material balance (FMB) and (3) Fractional RTA.

Who Attends

Petroleum engineers, managers and geoscientists who would like to learn RTA in a practical and hands-on way.


.8 CEUs will be awarded for attending this 1-day course.

Cancellation Policy

All cancellations must be received no later than 14 days prior to the course start date. Cancellations made after the 14-day window will not be refunded. Refunds will not be given due to no show situations.

Training sessions attached to SPE conferences and workshops follow the cancellation policies stated on the event information page. Please check that page for specific cancellation information.

SPE reserves the right to cancel or re-schedule courses at will. Notification of changes will be made as quickly as possible; please keep this in mind when arranging travel, as SPE is not responsible for any fees charged for cancelling or changing travel arrangements.

We reserve the right to substitute course instructors as necessary.


Mathias Lia Carlsen

Mathias Carlsen is General Manager for Americas at Whitson, a company that develops all-in-one, web-based, petroleum engineering platform named Whitson+. After earning his MSc Carlsen joined Whitson and has been a key developer, conceptual driver and product manager of Whitson+ for unconventional reservoir model management. 

Through Whitson, Carlsen has also supervised and consulted on projects for more than 50 E&P companies. In addition he researches and teaches industry courses on well performance, advanced pressure, volume and temperature (PVT) studies, phase behavior and gas-based enhanced oil recovery.

Carlsen holds an MSc degree in Petroleum Engineering from the Norwegian University of Science and Technology and was a Fullbright Scholar at Stanford University.

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