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HomeTechnical Papers Acoustic Foam Depression Tests
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Acoustic Foam Depression Tests

A knowledge of the producing bottomhole pressure is desired in most artificial lift wells to determine if the well is being produced efficiently. An acoustic liquid level test and casing pressure measurement permits calculation of the PBHP. If the well contains liquid above the formation and the well produces gas from the casing annulus, the liquid column is aerated with gas bubbles. These bubbles are continuously moving upward through the gaseous liquid column. The gas is vented at the surface. The gradient of this gaseous liquid column is not known with a high degree of precision.

One technique for determining the gradient of the gaseous liquid column is to depress the liquid level by closing-in the casing valve. Stopping the flow of gas from the casing annulus at the surface of the well causes the casing pressure to increase. The casing pressure increase depresses the height of the gaseous liquid column. The test can be continued to determine the gas/liquid interface pressure as the top of the gaseous liquid column is depressed. This data can be used to calculate the gradient of the gaseous liquid column and the producing bottomhole
pressure.

Several wells were tested which contained bottomhole pressure sensors. The increase in producing bottomhole pressure was measured as the liquid from the casing annulus was displaced into the pump, which necessarily reduces liquid flow from the formation. The casing pressure and top of the gaseous liquid column was also determined. Several examples are presented to show the effect of closing-in the casing annulus gas vent valve on the producing bottomhole pressure, casing pressure and height of the gaseous liquid column.

Category: Technical Papers Tag: English
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    • HOME
    • PRODUCTS
      • ECHOMETER
        • Well Analyzer
        • Wireless
        • Model M
        • Model H
        • Gas Guns
        • Transducers
        • Downhole Gas Separators
      • ARTIFICIAL LIFT EQUIPMENT
        • Downhole Separators
        • Electric Submersible Pumps
        • KUDU Progressive Cavity Pumps
        • KUDU HPU Hydraulic Pumping Units
        • Sucker Rod Pumping
      • WELL COMPLETION
        • Blowout Preventers
        • Line Weights
        • Stuffing Boxes
        • Rod Hooks
        • Rod Wrenches
        • Swivel Links
        • Wheeled Rod Guides
      • OILFIELD EQUIPMENT
        • Pipe Repair Clamps
        • Pumping & Flow Tees
        • Polished Rod Clamps
        • Seismic Stimulation Tool
        • Wellheads
    • SOFTWARE
      • ECHOMETER SOFTWARE
        • Total Asset Monitor (TAM)
        • Total Well Management (TWM)
        • Gas Separator Simulator
      • ROD PUMPING OPTIMIZATION
        • XSPOC
        • XROD
        • XBAL
        • RODSTAR
        • XTOOLS
        • XDIAG
      • PROGRESSIVE CAVITY PUMP
        • PC-PUMP
    • SERVICES
      • SOLUTIONS
        • Artificial Lift Design and Optimization
        • Dynamometer and Fluid Level Services
        • Echometer Maintenance and Repair
        • Digital Telemetry and Automation
      • CONSULTING
        • Asset Evaluation and Management
        • Reservoir Engineering
        • Well Performance Optimization
        • Digital Oilfield
    • TOOLS
      • Automotive Tools
      • Cutting Griding Tools
      • Driver Tools
      • Impact Socket Accessories
      • Industrial Wrenches
      • Master Tools Sets
      • Pipe Tools
      • Pullers Vise C-clamps
      • Torque Tools
    • RESOURCES
      • UPC Global Blog
    • ACADEMY
      • UPC Academy
      • Online Training
        • – Available
        • – Coming Soon
      • Incompany Training
      • Echometer Training
      • Technical Papers
      • Webinar
      • Campus
    • CONTACT
    • Downloads
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