Field Tests

Field Tests

Uglemetan can perform field testing of coal seams to determine their in situ permeability.  This is accomplished by drilling from the surface to the coal seam and then performing slug tests and injections tests.  These are shown in the following schematic:


The equipment used for such testing is further described below.

Uglemetan has the following equipment available for such testing (some of which was obtained through an US EPA grant): Data Logger HERMIT 3000, Kuster electronic memory gauge, Baker Oil Tools production Injection Packer and a set of desorption tanks with measuring manometers to implement desorption tests.

K8-S Electronic Memory Gauge


The Kuster K8-s is a non-volatile memory probe with a strain gauge measurement sensor for recording downhole pressure and temperature data.

The K8-s includes the following: wireline buffer tube & nose cone, isolated bellows for extended transducer life, memory: 128000 data points (pressure/ temperature), custom programmable up to 32 va-rious reading intervals, low power con-sumption.



hermet2Data Logger Hermit 3000

The Data Logger HERMIT 3000 provides data sampling and monitoring of the process. The incorporated pressure Transducer PXD-261 is an accurate, stable, fully submersible device for monitoring changes in a water level. It collects fast, accurate time-drawdown data from pump and slug tests, in-cluding the reco-very phase. The PXD-261 is ideal for both short-term tes-ting and long-term monitoring.




Production Injection Packer


The single set Production Injection Packer is an inflatable packing element that is set by pumping fluid down the tubing string to provide a well bore sealing and anchoring. Because the element is set with pump pressure, tubing weight is not required to set the tool, so it can be run shallow and in other applications, where tubing weight is not available.












Desorption Tests

Although some preliminary coal desorption tests can be run in the field, more comprehensive testing can be accomplished in the laboratory.  There, the coals can undergo more complete desorption tests and can be put through adsorption/desorption cycling tests.

Desorption Canisters


The set can be utilized for a research into sorption properties of coal both in laboratory and field conditions. It includes 4 tanks and 24 canisters for storage and uses samples of coal for the laboratory purposes.

Field testing:

Uglemetan has successfully completed numerous field tests in boreholes, including the Taldinsky deposit and the Chertinskaya Mine in the Kuznetsk Coal Basin of the Russian Federation. Uglemetan regularly performs desorption and permeability tests of coal seams and is able to perform them in Russia, the CIS and internationally per the request of coal companies.

Uglemetan will present the analyzed data in technical reports, which can be written in Russian and/orEnglish. The Reports will include sections describing the geology of coal seam and the associated gas, well bore designs and methods necessary to investigate filtration and/or reservoir properties of coal seams, plus estimates of the outputs based on the coal seam permeability and gas content and their interpretation.

Uglemetan may perform the following additional activities per the client’s request:

  • Investigate potential for gas liberation production increase from mining,
  • Estimate the effect of gain-frequency characteristics and hydrodynamic impact source location in the wellbore on the filtration properties of a mining rock massif.
  • Analyze the role of the coal structure on the movement of methane through coal seams under the impact of a hydrodynamic impulse, and
  • Formulate quantitative and qualitative criteria for a hydrodynamic impulse effective impact.