Course objectives: After passing the exam, the student will understand laboratory procedures for determining rock properties (permeability, capillary pressure, wettability, porosity), including practical work (routine analysis of rock samples), practical introduction to equipment in a petrophysical laboratory and preparation of reports measuring individual rock properties.

Course content:

• Description of methods for obtaining samples from the well;
• Planning the core sampling;
• The method of retaining the original saturation;
• Sample sorting and preservation, preparation for analysis, core extraction;
• Description, imaging, gamma radiation measurements;
• Methods for determining the saturation in the core (Dean-Stark, Soxhlet extractor, etc.);
• Helium porosimetry;
• Calibration curve, description of method and apparatus, interpretation of results;
• Measurement of absolute permeability;
• Description of methods and apparatus, Klinkenberg correction;
• Measurement of relative permeability by steady state and unsteady state methods;
• Cases of immiscible fluids and miscible fluids flow;
• Measurement of minimum miscibility pressure, MMP curve, correlations, criteria for determining MMP and description of slim tube test;
• Determination of wettability (Amott test, Rise in Core);
• Measurement of contact angle and capillary pressure;
• Suction method, Purcell method, porous-plate method, centrifuge method;
• Application to reservoir, aquifer rocks, architectural-building stone etc;
• Calculation of immiscible flow in the core by Welge method and determination of relative permeability ratios;
• Calculation of relative permeability from data of produced volumes during flooding of oil-saturated core;
• Review of other methods of routine (RCAL) and special (SCAL) rock analyses;
• Preparation of core-analysis measurement reports;
• Correlations of relative permeability and capillary pressure;
• Preparation of data for reservoir simulation and analytical calculations - methods of reducing the measured relative permeability curves and capillary pressure curves to the analytical form;
• Curve normalization;
• Calculation of saturation in the core based on laboratory tests;
• Laboratory exercises for determining porosity by helium porosimetry;
• Laboratory exercises for determining absolute permeability; Laboratory exercises to determine the capillary pressure curve;
• Conversion of measured capillary pressure data to reservoir pressure and temperature conditions and reservoir fluid system;
• Determination of pore size distribution - application of stochastic model of tubes for adjustment with measured permeability;
• Analytical description of the distribution of pore sizes based on the assumption of different pore geometries;
• Seminar - Preparation of reports in the form of interpretation of measured data;
• Matching of laboratory data and analytical models - normalization and organization of data;
• Confirmation of measured values ​​from SCAL analysis by coreflood model;
• Sensors, transducers and transducers in laboratory petrophysical measurements;
• Creating your own data acquisition system.

Learning outcomes at the level of the course:

• Observe the outliers - samples of the measured data;
• Analyse and correct the measured data of petrophysical properties of rocks;
• Identify individual elements of apparatus for specific measurement of petrophysical properties of rocks;
• Carry out procedures for processing and interpretation of measured data;
• Make a model of a digital core;
• Design a system for receiving and processing data during measurements in the laboratory for special analyses of rocks and fluids;
• Match the results of laboratory flow measurements with reservoir data.