ResLab has always been at the forefront of research and development for wellsite services and equipment. Our Gypsum Core Protection method and our Core Transportation System have set new standards for the quality of core protection at the wellsite.

After core protection on the rig floor, the ResLab Core Transportation system provides safe transit of materials to the laboratory, to ensure that the petrophysical characteristics of the cored rocks are fully preserved during transit.

More recently, ResLab Sampling A.S. has developed a reservoir fluid sampling and analytical capability at the wellsite. Several fully equipped wellsite units are now available for our clients, as the demand for this service continues to grow.

ResLab will continue to develop wellsite capabilities, as client expectation for real-time or near real-time data becomes more widespread. We look forward to further growth in the range of our wellsite services over the coming years.

ResLab Core Handling Services

The following services and equipment are supplied to our clients, together with experiences personnel, to ensure that the highest quality core handling services are supplied from ResLab:

• Gyspsum Core Protection
• Core resination with epoxy resin
• Reslab Core Transportation System

Wellsite Core Analysis Services

ResLab pays particular attention to detail when discussing the coring and core analysis work programme with our clients. These early discussions are paramount when planning core analysis services at the wellsite, particularly in climatically hostile environments. ResLab will make recommendations, from our experience, about the benefits and potential problems of performing certain core analysis tests at the wellsite, to enable the client to make fully informed decisions about the wellsite testing programme. A selection of wellsite analysis that can be performed include:

• Tracer analysis
• Core gamma logging
• Core plugging and sample preservation
• Sedimentological core description
• Core fracture logging

Wellsite Fluid Sampling Services

Bottom Hole Sampling (BHS)

Oil, gas or water samples may be collected using bottom hole samplers run on third party wireline or in DST sample carriers. Samples are transferred, validated and analysed at the wellsite. Representative samples may be shipped to the PVT Laboratory for further analysis.

Wireline Formation Sampling (WFS)

Samples from third party wireline formation samplers may be transferred, validated and analysed at the wellsite. Representative samples may be shipped to the PVT Laboratory for further analysis.

Separator, Wellhead, or Flowline Sampling

Surface samples of oil, gas or water may be collected using PVT sampling kits with a variety of sample cylinders (see below). Manual or computerised sampling equipment including heated sampling lines is available. The following types of samples may be collected:

• Separator PVT samples (oil and gas matched pairs)
• Wellhead single phase samples
• Flowline or pipeline samples
• Production samples including bulk stock tank oil

Isokinetic Sampling

Manual or computerised isokinetic sampling equipment may be provided complete with heated sampling lines. Applications of isokinetic sampling include:

• Representative sampling in wet gas streams
• Estimation of entrained liquid carry-over in separator gas
• Correction of condensate gas ratios

Sample Cylinders (all mercury free)

A comprehensive range of sample cylinders is available as listed below:

• Single phase oil cylinder, stainless steel, 10,000 psi, 700 cc
• Single phase oil cylinder, stainless steel, 15,000 psi, 700 cc
• Conventional oil cylinder, stainless steel, 10,000 psi, 700 cc
• Conventional oil cylinder, stainless steel, 15,000 psi, 700 cc
• ProLight oil cylinder, titanium, 690 bar, 640 cc
• ProLight oil cylinder, titanium, 1400 bar, 640 cc
• ProLight oil cylinder, titanium, 690 bar, 1000 cc
• ProLight oil cylinder, titanium, 1400 bar, 1000 cc
• ProLight oil cylinder, titanium, 690 bar, 4000 cc
• Luxfer Gas cylinder, 200 bar, 20 litres
• X-pand isokinetic sample gas cylinder (with diaphragm), 100 bar, 15 litres
• Atmospheric samples containers (all sizes)

Wellsite Fluid Analysis Services

Reservoir Fluid Analysis (RFA)

Fluid samples are analysed using our Reservoir Fluid Analysis (RFA) onsite Laboratory container. The 20 foot laboratory unit is fully pressurized and comes complete with lab benches, air conditioning, and analytical equipment to enable the following PVT measurements to be performed at the wellsite.

• Molecular composition of oil and gas by gas chromatography
• Molecular weight determination
• Bubble point pressure at ambient and elevated temperature
• Density of fluid at ambient and elevated pressures and temperatures
• Flash of sample and GOR measurement
• Reservoir fluid composition

PVT simulation may also be performed at the wellsite using PVTsim. More extensive PVT analysis may be provided in remote onshore locations or in our PVT Laboratory in Norway.

Gas Analysis

The following measurements may be performed at the wellsite on samples of produced gas:

• Mercury
• Radon
• Hydrogen sulphide
• Mercaptan sulphur
• Carbon dioxide
• Molecular composition by gas chromatography

Other trace elements or non-hydrocarbons may be detected on request.

Oil or Condensate Analysis

The following measurements may be performed at the wellsite on samples of produced oil or condensate:

• Density, API gravity
• Water content

Other measurements (e.g. pour point, viscosity, etc.) may be performed on request.

Water Analysis

Water analysis is available using wet chemistry methods and several instrumental techniques including ion chromatography. Standard 10 ion analysis includes the following measurements.

• pH
• Density
• Resistivity, conductivity
• Alkalinity
• Chloride, sulphate
• Barium/strontium

Other elements such as sodium, calcium, magnesium, potassium, iron, etc may be performed on request. Oil in produced water may also be performed.

PERSONNEL

According to the nature of the services, ResLab Sampling can supply the following categories of fully trained and experienced personnel to perform the work:

• Sampling Engineer
• Analysis Engineer
• Chemist
• Sampling Technician
• Analysis Technician

The exact quantity of personnel required will be dictated by the nature of the job and other factors such as the requirements for 24 hour coverage and of course compliance with safety regulations.