Studies Of Thermal Treatment Methods And Production Stimulation Technologies

Studies cover the following areas:

  • full range of works on determination of kinetic parameters of oil oxidation using HP DSC1 high pressure differential scanning calorimeter (DSC) and thermochemical reactor. Kinetic parameters determined in the high pressure DSC and reactor, such as activation energy, reaction order, pre-exponential factor, and enthalpy, are required for building mathematical models of in-situ combustion (thermal gas treatment);
  • modeling of in-situ combustion processes directly in the "combustion tube" that allows determining quantitative and qualitative characteristics of the process (thermal gas treatment) for specific field, including such indicators as injection air flow rate, residual fuel quantity, and combustion front temperature profile;
  • modeling of polymer flooding in porous medium including heterogeneous and fractured formations;
  • modeling of multi-phase filtration using core holders reproducing filtration processes on original rock samples from fields, and qualitative filtration studies on made-up reservoir models that allow simulating virtually any conditions in accordance with the set task;
  • studies concerning assessment of relative efficiency of inhibitors of paraffin and salt deposits for the purpose of inhibitor selection for specific oils;
  • qualitative and quantitative determination of sulfur and metal content in oil and oil products by means of X-ray fluorescence spectrometry;
  • rheological studies within a wide range of viscosity from 3 to 6,000,000 mPa·s at temperature from 35°С below zero to 300°С above zero at rotation speed of 0.01-200 rpm.
Multi-Function Filtration Unit

The unit allows determining relative multi-phase core permeability for fluid-fluid flow components, residual oil content in the rock under study, and rock permeability coefficient for fluid and gas. The unit is also used for experimental studies concerning thermal and thermal-steam formation treatment and in-situ combustion modeling.

Filtration studies are conducted using polymers and surface-active agents.

HP DSC1 differential scanning calorimeter

HP DSC1 high pressure differential scanning calorimeter (DSC) allows measuring thermal effects within a temperature range of 22-700°С at pressure 0-10 MPa in isothermal and dynamic modes with scanning rate up to 100 K/min.

The resulting information allows determining the nature of the oxidizing processes and characterizing the properties of the tested material (oil, producing reservoir rock, kerogen, shale, vegetable oils, etc.) both individually and in presence of catalysts.

HP DSC1 is one of the main devices used for investigating oxidizing processes; around 2000 various experiments have already been conducted since its commissioning in 2010.

Thermochemical Reactor

Thermochemical reactor allows conducting kinetic studies of oxidizing reactions at temperature from 20 to 600°С and pressure from 0.1 to 40 MPa both in isothermal and step-by-step heating non-isothermal modes, in flowing and static states.

Combustion Tube

Combustion tube has following characteristics:

  • maximum reservoir pressure 12 MPa;
  • maximum temperature 700°С;
  • model diameter 80 mm;
  • model length 1500 mm;
  • maximum core length 300 mm;
  • number of sections with autonomous temperature control 15.

The "combustion tube" is used for investigating thermal formation treatment and determining quantitative characteristics of the in-situ combustion processes.

Laboratory unit for determining the efficiency of
paraffin deposit inhibitors by means of coldfinger test

X-ray fluorescence spectrometer Spectroscan MAX GF2E for qualitative and
quantitative determination of sulfur and metals in oil and oil products