NoDoC, Cost  Engineering  Data  Warehouse for Cost Management of Oil & Gas Projects
Follow us
  • Home
  • About
  • NoDoC
  • Blog
  • Training
  • Customers
  • Library
    • Books
  • Pedia
    • Upstream >
      • Reservoir Eng. >
        • Reservoir Properties
        • Reservoir Geology
        • Well Charting
        • Reservoir Geophysics
        • Reservoir Petrophysics
        • Well Testing
        • Reservoir Modeling
      • Exploration >
        • Evaluation
        • Geology
        • Geophysics
        • Geochemistry
        • Petrophysics
        • Simulation
        • valuation
      • Drilling >
        • Casing\Tubing
        • Tools & Accessories , Downhole Eqiupment
        • Technologies
        • Offshore Platforms
        • Drilling Services
        • Vessels-Offshore
        • Subcontractors
        • Drilling Rigs
        • Drilling Fluids
      • Completion >
        • Well Completion
        • Well Logging
        • Well Stimulation
        • Sand Control
        • Sediment Prevention
        • Well Performance
        • Wellhead Facilities
      • Enhanced Recovery >
        • Thermal Methods
        • Non Thermal Methods
        • ESP
        • Wellsite Optimization Equipment
        • Technical Assessment
        • Economic Analysis
    • Midstream >
      • Oil & Gas Processing >
        • Gathering Systems
        • Separation
        • Treatment
        • Dehydration
        • Desalination
        • Chemical lnjection
      • Transportation >
        • Gas Transfer Pipeline
        • Oil Transfer Pipeline
        • Tankers
        • Vessels
        • FPSO
      • Storage >
        • Petroleum Storage
        • Gas Storage
        • Underground Storages
        • Loading Arm
    • DownStream >
      • Refining Oil >
        • Desalting
        • Atmospheric Distillation
        • Hydro Treating
        • Reforming
        • Isomerization
        • Vacuum Distillation
        • Alkylation
        • Visbreaking
        • Catalytic Cracking
        • Cocking
      • Refining Gas >
        • Condensate & Water Removal
        • Acid Gas Removal
        • Dehydration
        • Mercury Removal
        • Nitrogen Rejection
        • NGL Recovery
        • Fractionation
        • Gas Sweetening
        • Tail Gas Treating
        • SRU
        • SUG
      • Distribution >
        • Residential
        • Commercial
        • Electric Power Generation
        • Piping
        • Tankers
        • CNG
        • Gas Station
        • Rail
        • Trucks
      • Sub Products >
        • Basic Unit
        • Intermediate unit
        • Parrafines
        • Olefines
        • Aromatics
        • Chemicals from Acetylene
        • Chemicals from Natural Gas
        • Chemicals from Synthesis Gas
        • Inotganic Petrochemicals
        • Methanol
    • Sample DB
    • Training
    • Petroeconomics
  • Thermopedia
  • Contact
  • Members Area
    • WJO Support Center
    • CNPCI SUPPORT CENTER
    • MAPNA SUPPORT CENTER
    • PEDCO SUPPORT CENTER
    • Vitara SUPPORT CENTER
    • KNPO SUPPORT CENTER
    • OTHER CUSTOMERS SUPPORT CENTER
  • Category
  • Uploads

NGL Recovery

 NoDoC designs the cost models for Natural Gas Liquids (NGL) for the following methods:

• Absorption

• Adsorption

• Condensation

 NoDoC cost estimation models and simulations are based on the following criterias:

REFRIGERATED ABSORPTION

  The gas is first cooled in conventional dewpoint control facilities down to -30 to -35°F. the gas then passes through an oil absorber where the various components are absorbed. The gas leaves the tower and is sent to a presaturator where the oil is saturated with methane and ethane. The gas then is returned to the chilling system for cooling the incoming gas.

The oil that leaves the absorber is called rich oil and contains all the absorbed compounds. The condensed hydrocarbon liquids from the chilling section joint this stream. The rich oil is heated and reduced in pressure to about half of the absorbing pressure in the rich oil flash tank. A considerable amount of the absorbed methane is flashed off in this vessel. The oil is then further heated and sent to a de-ethanizer where most of the ethane and the remaining methane are fractionated out of the oil stream. Finally the oil is sent to a Hp still where the absorbed products are produced as the overhead product and the bottoms produced is lean oil which is cooled and recirculated to the absorber. The absorbed products are sent to the fractionating facilities.

 ADSORPTION

For deep cut plants only carbon adsorption plants have been used to any extent. The particular problem is the wide temperature variations experiences between adsorption and regeneration. Two process using charcoal as the adsorbent are commercially used. The process is quite simple. One bed is on the adsorbing cycle, one bed is regenerated and one bed is cooled.

CONDENSATION ( CRYOGENIC OR EXPANDER PLANT)

The raw gas enters into an inlet separator where any liquids are separated. The gas is dried to about -150°F dewpoint.(about 10°F below the lowest expected temperature). The gas is then cooled in gas-to-gas exchangers. Condensed liquids are removed and then the gas is sent to an expander. This is a turbine that reduces the pressure to about half the entrance pressure and cools the gas by taking work out of it(down to -130°F or lower). The liquid hydrocarbons are again separated and then fed to a demethanizer in which the methane is removed,then to the de-ethanizer for production of specification ethane and propane. The lean gas is used, along with the other liquids to cool the incoming gas. It is then recompressed to the required outlet pressure using the energy available in the pressure drop and considerable additional energy from outside to get it back to its original pressure.

Copyright@ 2016-2017  Dione Oil Ltd.
✕