Application | Gas Storage Monitoring

GAS STORAGE MONITORING

OVERVIEW


Downhole pressure and temperature monitoring of gas storage wells provides operators with the basis for accurate material balance and level calculations. Governments are also increasing regulatory demands for the monitoring of underground hydrocarbon storage volume and pressure, and confirmation of caprock integrity on a frequent and long-term basis.

Acoustic Data’s SonicGauge™ Wireless Monitoring System allows cost-effective regulatory compliance by providing a high accuracy and high resolution wireless downhole gauge to measure pressure trends in order to identify the smallest deviation from expected static pressure. Additionally, the SonicGauge™ System provides dynamic measurement of injection and production pressure gradients when SonicGauge Repeaters equipped with onboard pressure transducers are deployed at strategic locations along the tubing string.

The SonicGauge can be quickly retrofitted on slickline using the Barracuda™ HEX-Hanger™ (high expansion gauge hanger) in monitoring wells with tubing sizes from 2-3/8” to 13-3/8”, offering a rig-less deployment option. The technology can be set virtually anywhere in the tubing string by the patented and battery powered Electro-SET (electro-mechanical setting tool).

The SonicGauge functions on an ultra-low energy budget and can provide real-time surface-read-out (SRO) data over several years without well intervention, thus reducing operational expenditure and risk for years at a time.

Download: Gas Storage Case Studies

View: SonicGauge™ Wireless Monitoring System

SonicGauge System | Drill Stem Testing

APPLICATIONS

  • Monitoring gas and oil storage volumes
  • Monitoring gas storage pressure
  • Monitoring cap rock integrity in offset observation wells
  • BENEFITS

  • Low-cost compliance with government regulations
  • Real-time reservoir storage data without workover
  • Reduced OPEX spend related to memory gauge surveys



  • CASE STUDY 1 | EUROPEAN OPERATOR

    The SonicGauge™ Wireless Monitoring System reduces well intervention activity and OPEX across a six-year period with a single slickline run


    TECHNOLOGIES

  • SonicGauge™ Wireless Monitoring System
  • Barracuda™ HEX-Hanger™ (Gauge Hanger)
  • Barracuda™ Electro-SET™ (Setting Tool)

  • CHALLENGE

    Underground Gas Storage (UGS) operators use depleted gas reservoirs to store natural gas during off-peak periods to have reserves to pump back into the gas transport system during periods of high seasonal demand. They monitor the volumes stored on a regular basis by interpreting pressure and temperature measurements taken inside the reservoir.

    The client was seeking a cost-effective single gauge solution to monitor real-time downhole pressure and temperature data in a key well over a multi-year duration to replace sporadic and costly memory gauge runs.


    SOLUTION

    Acoustic Data retrofitted a turnkey SonicGauge™ Wireless Monitoring System in a single slickline run. The SonicGauge Sensor was set in 7” tubing at a depth of 925m (3,034ft) on the Barracuda™ HEX-Hanger™ and was able to transmit real-time downhole pressure and temperature to surface in a single hop.

    The Barracuda system is not reliant on nipple profiles for installation which allowed the SonicGauge to be located at the exact depth that was required by the client. When the battery-powered Electro-SET (electro-mechanical setting tool) was recovered to surface, the onboard data logs confirmed that the HEX-Hanger had been successfully set.

    Post-installation, P&T data has been displayed on the SonicGauge Data Logger (SDL) and patched into the customers distributed control system (DCS) via the Modbus communication port.

    Two real-time P&T data points per day will be acquired for the planned system life of six years. After which, the downhole SonicGauge System will be retrieved, redressed, reprogrammed, and then rerun for another six years.


    RESULTS

  • Multi-year downhole-to-desktop data acquisition solution
  • Real-time data acquired during flow and shut-in periods
  • Significant reduction in OPEX due to reduced well intervention activity
  • Operational and personnel exposure at wellsite reduced, positively impacting Health, Safety and Environment (HSE)



  • CASE STUDY 2 | EUROPEAN OPERATOR

    The SonicGauge™ Wireless Monitoring System retrofitted via slickline to Underground Gas Storage well to provide multi-year downhole data acquisition


    TECHNOLOGIES

  • SonicGauge™ Wireless Monitoring System
  • Barracuda™ HEX-Hanger™ (Gauge Hanger)
  • Barracuda™ Electro-SET™ (Setting Tool)

  • CHALLENGE

    Underground Gas Storage (UGS) operators use depleted gas reservoirs to store natural gas during off-peak periods to have reserves to pump back into the gas transport system during periods of high seasonal demand. They monitor the volumes stored on a regular basis by interpreting pressure and temperature measurements taken inside the reservoir.

    The client was seeking a cost-effective method to monitor real-time downhole pressure and temperature data in a key well over a multi-year duration in order to replace sporadic and costly memory gauge runs. The system had to provide data during flow, high-pressure injection and shut-in periods.


    SOLUTION

    Acoustic Data retrofitted a turnkey SonicGauge™ Wireless Monitoring System in two slickline runs on the Barracuda™ HEX-Hanger™ system. The SonicGauge Sensor and SonicGauge Repeater were set in 7” tubing at depths of 925m (3,034ft) and 400m (1,312ft), respectively.

    The high-expansion Barracuda technology is not reliant on nipple profiles for installation and allowed the SonicGauge System to be located at the exact depths required by the client. When set inside the tubing, real-time downhole pressure and temperature (P&T) data was immediately available at surface.

    When the battery-powered Electro-SET™ (electro-mechanical setting tool) was recovered to surface after each run, the onboard data logs confirmed that the HEX-Hangers were successfully set.

    Real-time P&T data was displayed on the SonicGauge Data Logger (SDL) and patched into the customers distributed control system (DCS) via the Modbus communication port.


    RESULTS

  • Multi-year downhole to desktop data acquisition solution
  • Real-time P&T data acquisition during high injection and withdrawal rates (up to 35mmscf)
  • Significant reduction in OPEX due to reduced well intervention activity
  • Operational and personnel exposure at wellsite reduced, positively impacting Health, Safety and Environment (HSE)



  • CASE STUDY 3 | EUROPEAN OPERATOR

    Two SonicGauge™ Wireless Monitoring Systems successfully retrofitted in 2-3/8” tubing to reduce long-term OPEX while complying with local UGS monitoring regulations


    TECHNOLOGIES

  • SonicGauge™ Wireless Monitoring System
  • Barracuda™ HEX-Hanger™ (Gauge Hanger)
  • Barracuda™ Electro-SET™ (Setting Tool)
  • 4G-WiFi Communications Module

  • CHALLENGE

    The client was seeking a cost-effective method to monitor downhole pressure and temperature data in a monitoring well in real time over a multi-year duration in order to replace sporadic and costly memory gauge runs.


    SOLUTION

    Acoustic Data retrofitted two SonicGauge™ Wireless Monitoring Systems in a 2-3/8” dual-string completion on the Barracuda™ HEX-Hanger™ technology via slickline, circumventing the requirement for nipple profiles and restrictive tubing stops.

    The SonicGauge Sensor and SonicGauge Repeaters in string-1 were set in 2-3/8” tubing at depths of 1,935m (6,346ft), 1,300m (4,264ft) and 600m (1,968ft), respectively. In string-2, the tools were located at 1,925m (6,315ft), 1,298m (4,259ft), 850m (2,789ft) and 450m (1,476ft).

    A slimline (1.87” OD) Barracuda™ Electro-SET™ was used in order to pass through 2-3/8” nipple profiles and set the tools inside the tubing. Real-time downhole pressure and temperature (P&T) data was immediately available at surface and viewed at Acoustic Data headquarters via the 4G-WiFi communication system.

    The data acquisition schedule was initially programmed at 10-minute transmission intervals providing a downhole gradient survey along the well completion through the SonicGauge Repeaters equipped with onboard pressure transducers.

    The schedule then transitioned to 1-hourly intervals to provide dynamic injection and production pressure gradients for a period of two years. After which, the SonicGauge System will be retrieved, redressed, reprogrammed and rerun.


    RESULTS

  • Multi-year downhole-to-desktop data acquisition solution
  • Real-time wellbore pressure and temperature gradients
  • Significant reduction in OPEX due to reduced well intervention activity
  • Operational and personnel exposure at wellsite reduced positively impacting Health, Safety and Environment (HSE)