Gas-condensate studies: conditions that are necessary to obtain representative samples of reservoir fluids. Advantages and disadvantages of subsurface and surface sample collection; integration of samples.
New gas-condensate study technologies with surface sampling (using multiphase flow meters, on-stream sampling systems and a slip-stream sampling method). Results of comparison with conventional methods.
Subsurface open-hole sampling using wireline and drillstem formation testers (MDT and similar systems): advantages and disadvantages.
Gas-condensate studies in oil-gas-condensate reservoirs.
Session 2 – Laboratory Studies and Modeling of Phase Behavior of Gas-Condensate Systems
Laboratory studies of complex gas-condensate and oil-gas-condensate systems. Transportation and storage of samples, laboratory control of quality (QC), correctness of resaturation.
Laboratory experiment on differential condensation (CVD). How correctly it reflects the depletion-drive development process.
Equations of state for describing gas-condensate and oil-gas-condensate systems. Grouping of components and description of pseudofractions.
Definition of unified fluidal models for multipay fields in conditions of poor knowledge.
Modeling of hydrocarbon systems under high thermobaric conditions (НР, НТ).
Phase behavior of gas-condensate systems in dense formations and shales.
Determination of reservoir fluid geochemical characteristics (Fingerprinting) and their use for sharing production, accounting reserve recovery, and determining connectivity of gas-condensate reservoirs.
Session 3 – Gas-Dynamic Well Surveys. Study of Phenomena in Gas-Condensate Well Bottom Zones
Stationary and non-stationary surveys of gas-condensate wells. What can we obtain from them to describe the well bottom zone? Evaluation of well productivity in conditions of condensate bank formation.
Mathematical modeling of gas-condensate mixture inflow in wells. Can we take all factors into account?
Physical modeling of gas-condensate system filtration into the bottom-hole formation zone. Can we reproduce all phenomena?
Filtration of gas-condensate systems into the well bottom zone in dense reservoirs and shales.
Session 4 – Improvement of Gas-Condensate Well Productivity
Horizontal wells, multilateral wells, and hydraulic fracturing in gas-condensate reservoirs.
Bottom-hole formation zone treatments with hydrocarbon solvents.
Bottom-hole formation zone treatments with non-hydrocarbon solvents.
Change of formation wettability in the bottom-hole formation zone.
To what extent are gas-condensate well bottom zone treatments effective for improvement of well productivity?
Session 5 – Condensate Recovery, Factors Determining It, and Ways to Improve It
Influence of well spacing, design, and abandonment pressure.
Reservoir pressure maintenance – cycling process.
Session 6 – Oil Rims: Significance and Problems of Development
Substantiation of oil saturation distribution for oil rims.
Determination of capillary pressures, relative permeabilities, and water flood and gas displacement efficiencies.
Oil rim development systems. Optimum design of production wells.
Water injection into oil rims and its efficiency.
Commingled production of oil, gas, and condensate: principles of sharing and accounting.
