Distributed Acoustic Sensor for Oil and Gas

Distributed Acoustic Sensor for Oil and Gas

:Distributed Acoustic System Standard Communications Fiber The entire system consists of only two parts: a standard communications fiber that is positioned on or in the vicinity of the object to be analysed and the analyser that is connected to one end of the fiber LOCATION ACCURACY VARIABLE 1M + BANDWIDTH VARIABLE to 50kHz RANGE 50KM + DETECT EVENT SENSITIVITY FIELD RESULTS SYSTEM SET UP STREAM SOUND COMMUNICATIONS READY UL/CE APPROVAL SEISMIC REAL TIME LOCAL OR REMOTE FROM ANY POINT ON FIBER TO AND FROM SYSTEM APPROVED

: Multiple industries with multiple uses Oil and Gas monitoring Buried pipeline Leaks Perimeter Security and Military Underwater pipeline Leaks Well Flow Monitoring Umbilical Integrity Prisons, border control Civil Land, Marine & Space Public intrusion to restricted areas Restricted area Management Military Choke Points Port & harbour security Offshore Oil & Gas Installations Transport tracking Space Vehicles

Multiple DAS Solutions for Oil & Gas Industry Downhole Wellbore Seismic Plant & Rotating Machinery Flow & Allocation Check shot & VSP Vibration Contribution Fracture monitoring Operating signature Integrity assurance Microseismic monitoring Performance & Condition Sand detection Tomography Balance Pipelines Security Future System integrity Disturbance Surface Seismic Slugging & Turbulence Unauthorized entry Hydrate formation Disturbance and attack Theft Multi-Phase Flow Leak detection Terrorism Subsea monitoring Standard Communications Fiber

: Leak Simulation This short movie shows a 1 meter length of fiber picking up a low pressure (5 Bar flow and a 1 Bar leak from the valve) indicating the high sensitivity of the system.

: Tracking a moving object This short movie shows the power of HELIOS. We can track sound and velocity of a moving object to a meter s accuracy and the video shows examples of what we pick up at each meter along the fiber.

Case Histories

Tight Gas Well in Production Phase 9 8 7 6 5 4 3 2 1 TIME Gas + Water Production from zone 9 Gas Production from zone 7 Well Track

Tight Gas Well during Shut Down 9 8 7 6 5 4 3 2 1 Fiber inside Carbon rod (Ziplog) TIME Fiber was installed to this depth in the well Gas rises and water falls into sump as well reacts to shut in Gas Production from zone 7 Slowing down Water falling down into horizontal Well Track

Tight Gas Well at Start up 9 8 7 6 5 4 3 2 1 Fiber inside Carbon rod (Ziplog) TIME Fiber was installed to this depth in the well Water accelerated by gas starting to flow Water flowing up at low velocity from the sump Well Track

Tight Gas Well after 30 Minutes from Start up 9 8 7 6 5 4 3 2 1 Fiber inside Carbon rod (Ziplog) TIME Fiber was installed to this depth in the well Gas starting to slug showing exact entry point in zone 9 Gas starting to slug showing exact entry point in zone 7 Well Track

Moving flow in SAGD Producer DTS Trace warming Vibration in bend ESP Pump Vibration at kick off Pump More Active TIME Oil starting to move along well. Slope of curve is velocity of movement Primary Production Zone Secondary Production Zone

Monitoring ESP Flow in SAGD Raw Data Filtered to 1.5kHz Raw Data Filtered to 2.5kHz r DEPTH TIME

Sound Field Video of Detection of Increased Medium Production

Detection of Sand Flow: Medium Production Coinciding with Sand Production Start of Screens Turn-around Sub Onset of Detection

Well Pressure Test 20 Perforating stations conveyed on casing string Casing is not perforated and does not communicate with reservoir Movement of fluids in well PG s are external to casing and ported to the guns for measurement of layer pressure Guns fired via pressurizing casing and rupturing burst discs internal to casing

During pressure up The acoustic energy is caused by casing expansion during pressurization Casing ring above cement top after gun fires Note: Energy is measured150 above and below the 6 casing conveyed gun section

View of entire sequence

Why Oil & Gas Fotech Fiber Monitoring? Real time results at well site. Allowing immediate decisions Full well live view. Never been seen before Multiple monitoring solutions all with one fiber System is communications ready for remote live view Fotech use a standard communications fiber as the sensor Perfect for hazardous conditions. Fiber is inert