FIBER-OPTIC SYSTEM FOR M ONITORING EXTENDED OBJ ECTS FOSM - - PowerPoint PPT Presentation

FIBER-OPTIC SYSTEM FOR M ONITORING EXTENDED OBJ ECTS «FOSM »

• 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.

Applications:

Pipelines monitoring Perimeters monitoring

Applications:

Wells monitoring M onitoring condition of power transmission lines supports M onitoring railway ground work and motor ways

Logic module monitoring zone

Potential configuration of one FOSM module

Stand-by optic lines may be used for information transfer

• r control of pipeline systems

Signal amplifier

25 km 100 km 200 km 25 km 25 km 25 km

System operating principle

Distributed vibration sensor (DVS) unit Distributed temperature sensor (DTS ) unit Distributed stress sensor (DSS ) unit

LAN Switch DTS Unit DVS Optic Unit DVS Processing Unit UPS, Relay Unit, Power Supply Switching Unit

Example of logic module outfit

System structure

FOSM module FOSM module FOSM module

Data transmission network

Computation center and FOSM database

Data transmission network

AWP of FOSM

• perator

AWP of FOSM

• perator

REGISTRATION OF VIBRATION-ACOUSTIC PARAM ETERS

M onitoring pipeline systems, perimeters of territories and

• ther 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;
• M onitoring of pig movement;

Solvable problems

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

Applications

M onitoring pipeline systems, perimeters of territories and

• ther extended objects

Solvable problems

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 systemson upper and medium level of FOSM (integration with joint control system): M onitoring pipeline systems, perimeters of territories and

• ther extended objects

Pipelines patrol

~ 1.0 m

Example of fiber-optic cable allocation along pipeline

Perimeters guard

Note: For various versions of cable routing, different mechanisms

• f alarm signal forming are possible

First and second levels of indication

Examples of indications on operator AWP

Third level of indication, display of moving vehicle

Examples of indications on operator AWP

Examples of indications on operator AWP

Third level of indication, display of spillage

Examples of indications on operator AWP

Third level of indication, display of works with entrenching tools

REGISTRATION (M EASUREM ENT) OF TEM PERATURE PARAM ETERS

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.

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;
• M onitoring 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 behind-

casing fluid movements;

• M onitoring bottom hole pump operation or gaslift valves system;
• Monitoring well cement column operation in the process of well production, shutdown or conservation.

Specifications:

• Spatial resolution of distributed temperature sensor equals to 0.5-1.0 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 + 350 0С.

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

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

REGISTRATION OF FIBER-OPTIC CABLE DEFORM ATION (DISPLACEM ENT)

M onitoring of sensor displacements relative to initial (reference) layout Functions of FOSM upper level:

• Function of monitoring change of system sensor location.

Applications:

System tests which were carried out warrant reliable monitoring of geometric shape changes and/ or location

• f equipped object in space.

Tests: