Date: Thursday 21 September 2023 (9:00 - 17:00)

Presenter: David Hill (Sintela Ltd)

Cost: EUR 250/- 

Location: Hotel Meliá Milano

Registration: Please register by emailing us at registration@eage.org

Course Description

The upstream Oil & Gas use of Distributed Fiber-Optic Sensors (DFOS) for

measuring temperature, strain and acoustic energy continues to increase. DFOS

systems are being used in many measurement, monitoring and verification

applications as they provide unique insights into stimulation performance, dynamic

fluid movements along the wellbore and seismic behaviour.

This course introduces fibre-optics and the basic principles of Distributed Acoustic

Sensing (DAS) technology. It covers the key considerations, cable designs and

installation methods for onshore and offshore completions.

The focus is on providing an understanding of the different features of DAS systems

so that participants in the course can make informed choices when planning to use

DAS in seismic acquisition programs. It will also inform participants on the current

hardware, software and algorithm development in DAS.

Course content

Introduction to fibre optics

● Basic principle

● Fiber types

● How the fibre is made

● Splicing

● Connectors

● Testing using an OTDR

Optical fibre sensors

● Point sensors

● Multiplexed sensors

● Distributed sensors (DAS, DTS, DSS)

Distributed Acoustic Sensor

● The basic concept

● System architectures

● The measurement principles

Applications

● Applications outside of Upstream O&G

● Upstream applications

o Well integrity

o Flow profiling

o Frac monitoring

o Cross well strain

o Active seismic

o Passive seismic

Geophone comparison

● Conversion to geophone equivalent signal

● Frequency response as a function of gauge length

● Directionality response

● Cable designs

Installation configurations

● Fiber operating temperature range

● Permanent – Behind casing

● Semi-permanent – On production tubing

● Temporary – Intervention via wireline, coiled tubing. Etc

● Surface deployment

● Onshore considerations

● Offshore considerations

Selecting the DAS Performance and Features for your job

● Performance

o Quantitative vs non-quantitative

o Sample rate

o Sensitivity

o Frequency Response

o Spatial Resolution

● Use of Standard vs ‘Engineered’ fiber

● Hardware features

● Software features

Machine Learning for microseismic event detection

● Real-time microseismic detection and measurement