We Delivering Solutions of

Drill Stem Testing
Permeability Test (DST, IFOT & DFIT)
In-Situ Stress Tests (DFIT)
 
Data Acquisition
Real Time Monitoring of DST & DFIT Pump Off Control
Reservoir & Aquifer Monitoring
 
Sales & Service of
Liner Hanger Equipment
Inflatable Packers
Cementing & Tubular Accessories

Pro‐Test Well Services

Well Testing Services
Open Hole Drill Stem Testing (DST)
Injection Fall Off Testing (IFOT)
Diagnostic Fracture Injection Test (DFIT)
Air Assisted Flow Testing (AAFT)

 

Data Acquisition Services
Real Time Measurement of Well Tests
Pump Off Control
Reservoir & Aquifer Monitoring
Logging and Control
Downhole Memory Sensors

Well Test Services

Pro‐Test is the leading Australian Provider of Open
Hole Well Testing Services

Over 1800 tests in last 6 years
Very high success rates
Innovative solutions

 

Multiple Equipment Options
Inflate with Down Hole Pump
Inflate with Surface Pump
Conventional Weight Set Packers
Mechanical Cased Hole system

DST Services

During or after drilling a well a DST may be conducted in the Open Hole section of the well. They can also be conducted inside casing following completion.

A DST provides an inexpensive temporary completion of a zone of interest. Using the drill string as a conduit and various combinations of packers and tools, a zone of interest is isolated from the remainder of the open hole.
The hydrostatic pressure is removed permitting the well to flow – drawdown & then buildup.

Various Reservoir Characteristics can be Obtained from DST Data:
Maximum Reservoir Pressure
Wellbore Damage
Permeability
Barrier Indications (Anomaly indications)
Radius Of Investigation
Depletion or Drawback

How Do We Get the Data?
1. Make up tools utilising existing equipment. (ie – the rig’s drill stem)
2. Travel to the zone of interest. (run In hole)
3. Isolate the zone of interest. (energise the elements, set the packers)
4. Reduce the hydrostatic pressure on the zone. (open downhole valve)
5. Let the well flow. (but maintain well control)
6. Shut the well in. (close the downhole valve)
7. Repeat as required.
8. Replace the hydrostatic pressure. (activate circulation sub)
9. Travel from the zone of interest. (pull out of hole)
10.Remove tools and download data.

In General Open Hole Tool types can be divided into 2 Groups:

1. Inflate tools require energising by fluid into the packer elements.
2. Conventional tools require energising via weight.

Inflate Tools with Down Hole Pump:
Utilizes a mechanically actuated downhole pump to inflate one or two packers with wellbore fluid.
The inflated packer elements seal and isolate the wellbore test section.
A downhole valve (Hydraulic Tool) is functioned, opening and closing the formation (or zone of interest) to the test string.
Opening the Hydraulic Tool facilitates drawdown of the reservoir, so that a stabilized rate of flow is established.
Closing the Hydraulic Tool facilitates a pressure build up so formation pressure may be established.
Representative samples of formation fluid may be retrieved if required.

Inflate Tools with Surface Pump:
Pro‐Test’s 4 Stage Open Hole Inflate System employs a multi‐cycle valving mechanism that allows fluid communication in the following stages:
      Stage 1 – Open to Packers to allow for inflation and deflation
      Stage 2 – Open to the Annulus to allow circulation above the Packers
      Stage 3 – Closed to for pressure test of string or shut‐in of test zone
      Stage 4 – Open to the test zone
Packers are inflated by pumping down the test string from surface.
Shifting between stages is accomplished via axial movement only – no rotation is required.
This multi‐stage functionality enables multiple tests in a single run in hole.
Compressed air or Nitrogen is pumped into the test string to push fluid into the annulus via the circulation stage and bled off for the underbalance.
Suitable for use with Coiled Tubing operations.

Conventional Weight Set Tools:
The Open Hole Conventional System uses compression set packers seated either side of or above the test zone, with tail pipe below the packers to the bottom of the hole.
Placing weight on the tool energises the packers as well as opening a hydraulic valve allowing the test formation to flow into the test string.
The formation is flowed for a specified time period, after which the Rotating Shut ‐In Tool (RSIT) is closed for the shut‐in period by rotating the test string a specified number of turns.
Up to 3 flows and 3 shut‐ins can be performed with this tool after which it will need to be re‐set at surface.

IFOT Services


Inflate Tools with Constant Rate Pump:
Pro‐Test’s 4 Stage Open Hole Inflate System is ideally suited to conducting Injection Fall Off
Test’s.
Packers are inflated at test depth to isolate the test formation.
A constant pump rate is used to inject ensuring the pumping is stopped prior to the injection
pressure reaching fracture pressure.
Ideally the tool is closed in downhole and the fall off monitored via the Real Time Telemetry system.
Multiple tests can be conducted on a single run in hole.

DFIT Services

Inflate Tools with Surface Pump:
Pro‐Test’s 4 Stage Open Hole Inflate Systems is ideally suited to conducting Diagnostic Fracture Injection Tests.
Packers are inflated at test depth to isolate the test formation.
High pump rates can be pumped through the tool (over 7 BPM).
Ideally the tool is closed in downhole and the fall off monitored via the Real Time Telemetry system.
Can be useful for collecting permeability data in very low permeability formations.
Ideal for multiple In‐Situ stress tests.

AAFT Services

CSG Air Assisted Flow Test:
CSG full wellbore test (production test)
Well airlifted to SCUF tank
Electronic flow rate measurement
Real Time pressure measurement
Downhole Shut‐in with casing packer
Cost effective test solution

Data Acquisition Services

Real Time Measurement of Well Tests
Electro Magnetic Telemetry System or
Acoustic Telemetry System
Real Time pressure data allows for optimisation of the test program maximising data quality and minimising rig time

Downhole Memory Sensors
Pressure / Temperature measurement of well tests
Robust Piezo Gauges used as standard
High sample rates (1 second)
High resolution (0.0003% FS) and accuracy (0.0223% FS)
Quartz gauges supplied on request
Fit for purpose gauge carriers to meet requirements

Cabled Permanent Monitoring Systems
Pump Off Control
Reservoir & Aquifer Monitoring
Analogue and Digital systems
Remote area systems with Solar Panel Power supply

Acoustic Wireless Monitoring Systems
Reservoir & Aquifer Monitoring
Ideally suited to Multi‐Zone systems
Repeater system for deep applications
Mounted externally or internally on the tubing
Magnetic pick‐up: no specialized wellhead required.
Also suitable for Well Test applications