Kapexy’s experience covers PVT modeling of all types of petroleum reservoir fluids. Below are examples of the fluid modeling services offered.

EoS Modeling

Kapexy offers equation of state (EoS) modeling ranging from a single fluid EoS model to common EoS models for more than 100 fluids. Component lumping and model selection will be adapted to the customer’s end use. Carried out by consultants with 30+ years of experience, you are guaranteed a high-quality product. The EoS modeling service can optionally be combined with training of your engineers in the EoS modeling discipline to enable them to solve future EoS modeling tasks.

EoS Modeling with Limited PVT Data

An approximate EoS model is often needed before the PVT study is completed. With a fluid composition and the saturation pressure at the reservoir temperature as the only input, Kapexy offers to generate a full PVT report that can be used in initial reservoir evaluations. This is done using a technique for estimating the critical point of a reservoir fluid presented in recent Kapexy publications. The location of the critical point, together with the saturation pressure at the reservoir temperature, is sufficient to determine the approximate phase behavior of a reservoir fluid.

Depth Gradient Modeling

Access to comprehensive data for the compositional variation with depth in petroleum reservoirs worldwide has enabled Kapexy to offer a highly specialized consulting service within depth gradient modeling. A compositional analysis and associated sampling data for a single fluid sample is all that is needed to obtain a reliable representation of compositional variation with depth. With fluid samples taken at different depths, the model can be adjusted to match the observed depth of a possible GOC and how the saturation pressure and GOR evolve with depth as well as the concentration profile of one or more components.

Thermodynamics for Reservoir Engineers

Many will remember thermodynamics at college as an endless list of equations and symbols without much connection to the real world.
Kapexy offers tailor-made courses in thermodynamics that with a minimum use of equations explain PVT concepts like:

  • What determines the saturation point of a reservoir fluid?
  • Why cubic equations are unmatched?
  • What makes the fluid composition change with depth in a reservoir?
  • What makes CO2 special?
  • How to explain entropy
  • What determines the variation in temperature from bottom to top in a well?
  • How can the fluid type change from gas to oil in a reservoir with no GOC?

Each course is planned in a close dialogue with the client.

Get to Know CO2

Kapexy has designed a course that will provide a fundamental understanding of CO2 and why it is challenging to transport and find suitable underground storages for CO2:

  • CO2 phase diagram and physical properties.
  • Capturing CO2 – frequent pollutants.
  • Transporting CO2 – corrosion issues.
  • CO2 as injection gas in petroleum reservoirs – combined storage and EOR.
  • Storing CO2 in aquifers – which CO2 properties count?
  • The acid effect of CO2.