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PRESSUREtrax™ Field Services
Build-up Tests: Build-up testing is likely the most common type of pressure transient test. The process requires shutting in the well and monitoring the changes in pressure against time. The resulting data is used to determine the degree of skin damage to the well-bore and to evaluate reservoir permeability;
Post Frac Fall-off and Stabilization: Following a Frac job the PRESSUREtrax™ system is installed and left in place to monitor the fall-off and stabilization of the formation pressure. On shallow gas wells the pressure will usually fall-off and stabilize within a couple of hours. On deep, high pressure well the system is left on for 12-24 hours. If the formation is very tight the pressure stabilization may take up to a week.
Injection Fall-Off Tests: The injection fall-off test is similar to a build-up test as pressure changes over time are monitored after fluid flow ceases. The primary difference between the two tests is that for injection fall-off tests, the monitored flow rate recedes back to the well rather than flowing from the well. The two objectives are permeability and skin;
Draw-down Tests: Draw-down tests yield the same information as build-up tests, however they are usually performed on new wells to determine reservoir limits. Draw-down testing is a function of monitoring pressure as well as production rate;
Pump Monitoring: Connecting the PRESSUREtrax™ system to a pump enables users to monitor the pump's pressure and determine if it is operating at optimum capacity. In addition, these pressure readings allow companies to detect contaminant build-up in the well bore and determine when cleanup is necessary;
Pipeline: There are multiple uses on a pipeline:
- A series of PRESSUREtrax™ units can be connected at the input of pipelines to identify bottlenecking at the distribution or input of the pump;
- Pressure testing the line can be easily accomplished;
- Deciding when to pig the line by watching the pressure increase on the pipeline;
- Customers inject chemicals and decide how long the pipeline can be placed in service before the next batch of chemicals needs to get injected by watching pressure changes as the chemicals react. This allows a cost saving since the next service can be performed when required, rather than at an arbitrary predetermined time;
Packer Isolation: Optimum packer performance requires packer leakage tests to confirm isolation of tubing from the annulus. The objective of the test is to ensure that packer is set properly and holding;
Plunger Lift: The PRESSUREtrax™ data acquisition system accurately records casing pressure, tubing pressure, plunger arrival and flow rate. Data capture and interpretation of casing and tubing pressure is essential to maximizing gas inflow while minimizing the liquid load across the producing zone. Real time data display allows personnel onsite to quickly interpret data optimizing well production or to correct problems. Sufficient test data is acquire while the well is in production thereby minimizing down time and loss of revenue.
The units monitor the casing and tubing for a period of three days in a new installation and then the data is downloaded. From this information we can set the on/off time of the plunger. After a month the test is repeated and monitored in real time to see if there are any changes required to optimize the wells.
Surface Casing Vent Flow Testing: 90 days after a new well is drilled it is a requirement to perform a leak test and submit the results to the regulatory agent. Yearly reports are required to be submitted on existing wells with a previously documented vent flow.
The PRESSUREtrax™ data acquisition system in combination with a pitot tube and electronic differential sensor is an extremely cost effective solution measuring Static Pressure, Differential Pressure, and Temperature. System installation will digitally record minimum gas volumes as low as 0.12 cubic meters.
Injection Pressure Steprate and Totalizer: During an injection or mini-frac, the PRESSUREtrax™ system with ratemeter can be used to monitor the Pressure and Volume of the pump output. At a fraction of the cost, the ILI PRESSUREtrax™ system produces all the information of a data van. It is like having a data van in a suitcase.
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