FIBER-OPTIC SYSTEM FOR MONITORING EXTENDED OBJECTS «FOSM»

Transcription

1 FIBER-OPTIC SYSTEM FOR MONITORING EXTENDED OBJECTS «FOSM»

2 Applications: - Detection of vibrations caused by object condition and/or third party interference; - Detection of temperature anomaly and/or measurement of extended object temperature; - Monitoring of static stress and/or deformations caused by change of geometric dimensions or displacement of extended object.

3 Applications: Pipelines monitoring Wells monitoring Perimeters monitoring Monitoring railway ground work and motor ways Monitoring condition of power transmission lines supports

4 Logic module monitoring zone Potential configuration of one FOSM module Stand-by optic lines may be used for information transfer or control of pipeline systems Signal amplifier 25 km 25 km 25 km 25 km 100 km 200 km

5 System operating principle Distributed vibration sensor (DVS) unit Distributed temperature sensor (DTS) unit Distributed stress sensor (DSS) unit

6 Example of logic module outfit LAN Switch DTS Unit DVS Optic Unit DVS Processing Unit UPS, Relay Unit, Power Supply Switching Unit

7 System structure AWP of FOSM operator AWP of FOSM operator Data transmission network Computation center and FOSM database Data transmission network FOSM module FOSM module FOSM module

8 REGISTRATION OF VIBRATION-ACOUSTIC PARAMETERS

9 Solvable problems Monitoring pipeline systems, perimeters of territories and other extended objects Functions of FOSM upper level: Function of activity monitoring: Activity evoked by man; Works with entrenching tools (digging); Work of earthmovers; Pedestrian traffic; Car traffic; Monitoring of pig movement;

10 Applications Monitoring pipeline systems, perimeters of territories and other extended objects Functions of self-diagnostics and remote monitoring of condition: Detection of cable break; Diagnostics of system logic modules condition; Data backup and archiving of fiber-optic sensor device condition; Results backup of extended objects monitoring; Functions of information display: Display of effective real-time situation at line part on operator AWP; Display of events report; Display of diagrams and tables which provide analysis of system modes of operation

11 Solvable problems Monitoring pipeline systems, perimeters of territories and other extended objects Function of information security provision: Authorized access to system functions; Auditing all activity of operator/dispatcher; Control of system tuning integrity; Function of reports and abstracts generation: Generation of consolidated reports of spillage (shift/day/week/month/year); Generation of consolidated reports of activity (shift/day/week/month/year); Functions of integration and information rendering/receiving from related systems on upper and medium level of FOSM (integration with joint control system):

12 Pipelines patrol Example of fiber-optic cable allocation along pipeline ~ 1.0 m

13 Perimeters guard Note: For various versions of cable routing, different mechanisms of alarm signal forming are possible

14 Examples of indications on operator AWP First and second levels of indication

15 Examples of indications on operator AWP Third level of indication, display of moving vehicle

16 Examples of indications on operator AWP Third level of indication, display of spillage

17 Examples of indications on operator AWP Third level of indication, display of works with entrenching tools

18 REGISTRATION (MEASUREMENT) OF TEMPERATURE PARAMETERS

19 Applications: At present time, development of live geological and hydrodynamic models of reservoir (field) in use is the essential part of hydrocarbon fields and subsurface gas holders development programs. This model presents an efficient mechanism for optimization of fields development. In this case critical role plays monitoring reservoir operation as a whole and relevant correction of model at late stage of field exploitation. In the process of such models development and their subsequent maintenance, the most critical moment but still not achieved until now is filling database with real-time operational data. Fiber-optic system of wells temperature survey with distributed temperature gauge is an efficient instrument for real-time wells investigation and monitoring. With the use of fiber-optic system of wells temperature survey, it is possible to create system for monitoring field development as a whole which allows to perform with high degree of confidence current correction of geological and hydrodynamic models of reservoir and take managerial decisions with high level of reliability. Temperature survey system is the only instrument for temperature investigations in wells having complicated completion design, downhole equipment of which does not provide access of conventional GIS instruments to wellbore.

20 Applications: Fiber-optic systems of temperature survey in the mode of wells investigation and monitoring provide the following : Control of reservoir thickness and separate beds operation in the process of production and injection under real time stationary and dynamic well rating; Dynamics control of fluids contact travel in the process of field development; Monitoring channel of product movement (tubing string channel) with the purpose to determine areas of possible paraffin and gas hydrate bridging; Appreciation of technical condition of casing string and tubing string, determination of leak areas and behindcasing fluid movements; Monitoring bottom hole pump operation or gaslift valves system; Monitoring well cement column operation in the process of well production, shutdown or conservation.

21 Specifications: Spatial resolution of distributed temperature sensor equals to m Temperature measurement accuracy +/- 0.5 deg.с. Temperature resolution 0.1 deg.c Maximum possible length of distributed temperature sensor cable is 100 km. Temperature range is 60 to С.

22 Case record of monitoring system Use case of real-time technology of well temperature survey is production and steam-injection wells commercial equipping of Ashalchyn field of high-viscosity oil. Control of steam injection to well and process of heavy oil production

23 Case record of monitoring system One of equipped objects may serve use case of real-time control technology of oil pipeline temperature parameters. Local change of fiber-optic cable temperature due to leak Information about leak accessible at AWP of operator

24 REGISTRATION OF FIBER-OPTIC CABLE DEFORMATION (DISPLACEMENT)

25 Applications: Monitoring of sensor displacements relative to initial (reference) layout Functions of FOSM upper level: Function of monitoring change of system sensor location.

26 Tests: System tests which were carried out warrant reliable monitoring of geometric shape changes and/or location of equipped object in space.