Gas Cycling: an Integrated ApproachNATG/GASCYCLGB

Who should attend?

  • This course provides participants with an integrated approach of gas cycling, from the reservoir to the surface facilities.
Audience :
  • Production or petroleum engineers involved in operating or designing Oil & Gas field processing facilities.

Level : Foundation

Course Content

  • GAS CYCLING

      • Introduction.
      • The integrated gas cycle: elements, configuration, challenges.
      • Gas cycling for pressure maintenance.
      • Gas cycling for miscible gas displacement (EOR): sweeping and soaking, compositional effects.
      • Dry gas cycling in retrograde condensate reservoirs.
      • Cycling non-hydrocarbon gases.
      • Major issues and constraints: reservoir, wells, flow lines and surface facilities.
  • WELL EFFLUENT BEHAVIOR

      • Different types of well effluent. Main characterization parameters.
      • Constituents that pose problems for storage and transport.
      • Gas composition: rich and lean gas, sweet and sour gas.
      • Gas PVT behavior.
      • PVT properties of pure components and mixtures.
  • RESERVOIR FLUID BEHAVIOR & NEEDS FOR GAS CYCLING

      • Phase envelop, reservoir and surface PVT issues.
      • Ternary diagram, first contact miscibility, multiple contact miscibility: condensing drive and vaporizing drive, Minimum Miscibility Pressure (MMP).
      • Specificities of condensate gas: retrograde region.
  • RESERVOIR ASPECTS

      • Reservoir performance.
      • Drive mechanisms: gas reservoirs, gas cap, gravity drainage displacement, tertiary gas displacement, miscible gas displacement.
      • Requirements for gas quality for injection, flowrate, cycling rate and configuration of injection.
      • Field development: architecture and phasing.
  • INTRODUCTION TO SURFACE FACILITIES DESIGN

      • Gas specifications to conform with gas cycling (dew point, sulfur removal & valorization).
      • Field processing of gas effluents for gas cycling.
  • GAS DEHYDRATION & SWEETENING

      • Moisture content of natural gas.
      • Gas dehydration processes.
      • Gas sweetening, acid gases disposal.
  • CONDENSATE: RECOVERY, STABILIZATION & MONETIZATION

      • Low-temperature separation techniques.
      • Condensate stabilization.
      • Monetization routes.
  • GAS COMPRESSION

      • Multistage compression: design criteria.
      • Gas compression versus field aging: effect on operating parameters, needs for booster station.
  • COMPRESSORS & DRIVERS

      • Compressors technology: choice criteria, effect of gas density evolution.
      • Compressor drivers.
  • INJECTION NETWORK

      • Network architecture.
      • Network operations, backpressure management.
      • Well performance issues.
  • CASE STUDY: SYNTHESIS - WRAP UP

      • Field monitoring, adaptation of surface facilities to field aging, re-injection rate versus surface production capacities and effect on recovery, re-injection rate versus gas sales and effects on reservoir monitoring.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • list main characteristics of Oil & Gas well effluents,
  • identify key field and reservoir parameters, choose a gas cycling strategy,
  • evaluate reservoir performances and recovery factor,
  • specify quality and flowrate needed for gas re-injection,
  • assess key parameters for surface facilities design as needed for gas re-injection.

Ways & Means

  • Highly interactive training with industry specialist lecturers.
  • Methodology illustrated by multiple industrial case studies.