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Gas Well Solution

Category Module Explanation
Ground segment
Ground demodulating system
May adopt many different types of demodulators
Downhole segment
Sensor
1/4”dia. armored cable which itself is a distributed sensor; extra pressure sensing probe needed for pressure detecting
 
Optical cable protector
Fix the sensor optical cable to the coupling part of each pipeline, to disperse the gravity of the cable and protect the cable in the downhole.
Monitoring Technology Function Technical Feature For More Information
Pressure and temperature monitoring

Pressure and Temperature Monitoring system is an optical fiber monitoring system installed permanently in the well, which tests single-point/multi-point pressure and temperature parameters in the downhole, as well as displays and stores data in the ground terminal.

Maximum temperature measurement of 230℃; maximum pressure measurement of 15000 psi

Temperature profile monitoring

The instrument system may give real-time whole course measurement toward downhole temperature profile, offering real-time temperature data of every meter of the downhole journey(from wellhead to bottom).

Maximum temperature measurement of 300℃;positioning accuracy of 1 meter

Gas production profile monitoring

The instrument system will provide real-time whole course measurement of the downhole gas production profile, offering the distribution of gas production profile (volume flow of gas production) in every meter of the downhole course.

Measuring accuracy may reach 10%; maximum measuring range may exceed one million square per day; positioning accuracy of 1 meter

Downhole interface monitoring

Optical fiber downhole interface monitoring system is a system installed in the well, which monitors working fluid level in real time. This system may also be applied to monitor the position of axial interface in different density regions in which gas, oil or water exists. It may measure different kinds of interfaces distributed in axial direction in the well (from the wellhead to bottom), with an accuracy of 1 meter.

Interface level measurement accuracy may reach 1 meter

String integrity monitoring

The instrument system may monitor the occurrence location, time and evolution process of incidents occurred in various kinds of wells, including gas and casing leakage, as well as packer and bridge plug breakdown.

Applicable for monitoring leakage of drivepipe, oil pipe, packer and bridge plug; positioning accuracy of 1 meter


Category Traditional electronic monitoring method Permanent optical fiber method
Real-time direct reading
Long-term monitoring
×
Low drift distance
×
High temperature resistance
×
Long service life(>5-10 years)
×
Distributed monitoring
×
Simple downhole construction
×
Capability of horizontal well monitoring
×
Multi-parameter real-time monitoring of little radial size integration
×


  • ŸImprove utilization efficiency of natural gas resources; verify stock; prevent gas migration or leakage in the gas reservoir;
    and guarantee the economic benefits of gas storage operation
  • ŸContinuous measurement without shutting well may decrease operation, increase efficiency during well opening,and
    reduce operation costs.
  • Reduce closing time of well closing; reasonable arrangement of gas production and liquid production period; increase
    stable production period
  •       

    The instrument system may permanently set up in new well or during overhaul, installed in the annulus along with tubular 

    column (fixed in the coupling part of each pipeline through optical cable protector). Weilanshi offers sealing method

     that allows optical cable traverse packer, traversing method through the wellhead, and BOP plan. We also offers overall 

    installation plan for horizontal well and inclined shaft.


  • Automate operation: when the installation is finished, with the equipment set up in the equipment room near the wellhead,
    it will automatically monitor the operation, and upload real time data through network.
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