Schlumberger

Reservoir Evaluation

Overview Technologies

Understanding reservoir characteristics

Knowing whether the hydrocarbons are contained in one or in multiple compartments, and the types of fluid in each compartment,  is critical in determining project economic thresholds.

Downhole acquisition of representative fluid samples and accurate pressure measurements provides information needed to make decisions on facility and infrastructure design, and may be useful toward understanding potential pressure changes within the reservoir during life of the field.

The best way to determine properties at reservoir scale remains well testing; bringing hydrocarbons to surface, separating oil, gas, and water and disposing the resulting fluids in an environmentally responsible manner. Seismic data assists the decision on the benefits of determining reservoir scale and connected volumes, but less so on permeability. Well testing is a significant operation which requires extensive planning, even as a contingency.

Estimating hydrocarbon volumes

Integrating seismic volume  with wellbore measurements collected in the first well is necessary to develop a volumetric model that includes

  • size, shape of, and compartmentalization within the reservoir
  • rock properties including porosity, permeability, fluid content, cement and diagenesis, fractures, etc.
  • fluid saturations and properties
  • recovery mechanisms and reservoir energy (gas drive, water drive, etc.).

Request More Information

Saturn 3D Radial Probe Samples Fluids from Tight Formations, Gulf of Thailand

Oil and Gas Exploration Reservoir Definition
Pressure measured and clean samples recovered in mobilities as low as 0.3 mD/cP, where conventional probes could not function.
Read case study

Be Certain

Testing Services screensaver

When decisions are critical, when uncertainty adds risk, we help you reach a better basis for your decisions—downhole or at the surface, from exploration to production.

Explore Testing Services