A Complete Range of Conventional Core Analysis Services

Porosity, Klinkenberg permeabilities and fluid saturations at reservoir stress for drilled sidewall, plug and full diameter core samples. We provide a full range of field services related to core preservation and transportation to our state of the art laboratory facility in Midland, Texas. We provide a full range of sample preparation techniques for sensitive minerals and a large in house core storage facility.

ROUTINE CORE ANALYSIS SERVICES

Research grade, automated equipment is available for routine core properties measurements (porosity, air permeability, grain density and fluid saturations). The equipment located at our 15,000 square feet laboratory facility in Midland, Texas and is capable of analyzing 15/16", 1", 1.5", 2" diameter plug samples as well as full diameter core samples from 2" to 4.25" diameter up t o 36" length. Numerous cleaning, drying and sample handling procedures are available.

Test results are available in many personal computer formats and can be uploaded on the internet in a secure location.

Drilled Sidewall Analysis

Accurate analysis of porosity, permeability and fluid saturations are available on a routine commercial basis. The following mercury free, nondestructive test sequence can be completed in 24 to 48 hours:

Flammable gas detection in the sample's shipping container

Fluorescence examination and description
Sample trimming
Sample photography (UV and daylight)
Salt extraction
Water content determination by Dean-Stark extraction
CO2 toluene oil extraction
Sample drying
Porosity and helium Klinkenberg permeability @ confining stress up to 10,000 psi overburden Grain density
Water and oil saturation calculation
Geological sample description
Permeability versus porosity cross plotting
Reservoir quality index versus normalized porosity plotting

The tests are conducted using research grade automated laboratory equipment. The samples are available for further testing. A complete line of special core analysis is available for sidewall samples.

The standard report includes tabular presentation of data as well as permeability versus porosity and reservoir quality index versus normalized porosity plots.

 

Plug Core Analysis
Accurate analysis of porosity, permeability and fluid saturations are available on a routine commercial basis. The following mercury free, non destructive test sequence can be completed in 24 to 48 hours:

Logging and transportation from the well to the laboratory

Core gamma
Core photography (UV and daylight)
Plug cutting and trimming

Fluorescence examination and description
Water content determination by Dean-Stark extraction
CO2 toluene oil extraction
Sample drying
Porosity, Klinkenberg permeability @ up to 10,000 psi overburden
Grain density
Water and oil saturation calculation
Geological sample description
Permeability versus porosity plotting
Core Log (Gamma, grain density, porosity, permeability, fluid saturations)

The tests are conducted using research grade automated laboratory equipment. The samples are available for further testing. A complete line of special core analysis is available. The standard report includes tabular presentation of data as well as permeability versus porosity semilog plot.

 

Full Diameter Core Analysis

Full diameter core analysis is desired when the properties of heterogeneous rocks (such as conglomerates, vugular and fractured carbonates) are not accurately represented by plug core analysis. Turnaround time is substantially longer than plug analysis due to the time required to extract the oil from the large full diameter samples. A typical testing sequence consists of:

Logging and transportation from the well to the laboratory

Core gamma
Core photography (UV and daylight)
Sample cutting and trimming

Fluorescence examination and description

 

Services available by Quotation

Water content determination by Dean-Stark extraction
CO2 toluene extraction
Sample drying
Porosity, grain density measurements
Maximum and 90o Klinkenberg corrected air permeabilitie
Geological sample description
Permeability versus porosity plotting
Core Log (Gamma, grain density, porosity, permeability, fluid saturations)

Confining Pressure Full Diameter Core Analysi

Porosity and permeability at confining pressure up to 10,000 psi
Klinkenberg permeability at confining pressure up to 10,000 psi

 

Hydraulic Flow Unit Identification

In some instances variations in pore geometry of the reservoir rock can define identifiable hydraulic flow units (similar fluid flow properties). Using a modified Kozeny-Carman Equation and the concept of mean hydraulic radius the reservoir quality index (RQI) is calculated and plotted against the normalized porosity index (φz). The intercept of the unit slope designated as flow zone indicator (FZI) is identified for each of the different hydraulic unit identified. The technique can also be used to select special core analysis samples.

 

Profile Permeability

The permeability to air is performed at desired points using an automated steady-state probe permeameter. The tests are conducted on slabbed cores. Using an appropriate measurement density it is possible to determine the regional variations in permeability. Test probes as small as 1/8” are available.

 

 

 

 

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