Sample Preparation

Wellsite Services

X-Ray Tomography

Extraction and Drying

Porosity and Permeability

Mini Permeability

Oil and Water Saturations

Particle Size Analysis

Core Resination and Photography

Sidewall and Drill Cuttings Analysis

Core Storage and Core Workshops


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2352 BZ Leiderdorp
The Netherlands
P +31 71 581 3505
F +31 71 301 0802

Oil and water saturations
Oil, gas and water saturations are important parameters in the study of oil and gas reservoirs.
Dean Stark method

Standard plug samples are either drilled with water (oil well) or oil (gas well) immediately after the core has been removed from the barrel. The samples are subsequently placed in a Dean Stark distillation apparatus. In this apparatus water is boiled out of the sample using toluene and this water is collected in a burette. Oil from the sample dissolve in the toluene and the amount of oil is calculated from the sample weight difference and the amount of water. The samples are subsequently cleaned with methanol in a soxhlet apparatus. The amount of salt in the sample is determined from the weight difference between before and after methanol cleaning. Finally the pore volume is determined with the Boyles Law Helium Porosimeter. The respective saturations of water, oil and/or gas are calculated from the measured amounts of oil and water and the pore volume.

Tracer Studies
By adding tracers to the drilling mud while coring, it is possible to distinguish between formation water and invaded drilling water. Various chemical or radioactive tracers are available. For the lab analysis we need preserved core sections (from which we will obtain plug samples) and drilling mud samples. A tracer study comprises of the above Dean Stark analysis, ultra-centrifuging of samples and various spectrometry analyses.

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