Reservoir Engineering Special Interest Group
Event Date Time Duration Registration Closing Date Registration Closing Time
Wed 4th Dec 2019
12 - 1:30pm 1 and a half hours 2nd Dec 2019 05:00 PM

Online registration for this event has closed

Registration Price:

SPE Member $10.00 ea


Pressure Dependent permeability in coal seams

Presented by Dr. Ian Gray from Sigra

SPE Queensland Reservoir Engineering Study Group

This is a group discussion forum primarily for practitioners involved with all aspects of Reservoir Engineering. SPE Qld is keen to have its members involved in this discussion forum which will enable a deeper technical conversation than is possible during other events and presentations.

Come along, get involved in this in-depth conversation and be an influencer in selecting the future topics for this discussion forum.

In the interests of enabling all attendees to actively participate in the discussion and due to the meeting room capacity numbers will be limited so register early. Registration will close when capacity has been reached.


The topic of this meeting is Coal Properties and Pressure Dependent Permeability.

The discussion will be catalysed by a presentation from Dr Ian Gray, SIGRA.

The presentation addresses the elastic behaviour of coals including their poroelastic behaviour. This work will show the hugely nonlinear elastic behaviour of most coals, their anisotropy and stress dependent porelasticity. It is the subject of several years of laboratory testing including the development of test processes to be used on core as opposed to large coal lumps.

This is an interactive discussion where attendees can share their knowledge, lessons learned, mentoring tips for the inexperienced and raise questions and issues in a friendly and collegiate group of peers and fellow professionals.


Ian Gray BE, MAppSc, PhD , RPEQ, MAusIMM, SPE

Managing Director, Sigra Pty Ltd

Ian started work as a civil engineer in New Zealand in 1977 and then came to the UNSW in Australia in 1978 to study for a Master’s in hydrogeology and engineering geology. From 1979 to 1982 he worked for Australian Coal Industry Research Laboratories based on mine sites in Queensland, during which time he worked on outbursts, gas drainage and rock mechanics. He completed his PhD while working in this role. He then worked as a geotechnical engineer for the Hong Kong Government on slope stability, foundations, groundwater and tunnelling until the end of 1988 when he returned via the UK and New Zealand to Australia.

His initial job when back in Australia was to supervise the installation of the first gas drainage system at Central Colliery and then went on to work as Senior Geotechnical engineer with D J Douglas and Partners. In 1990 he became Principal Engineer, Mining Research, with the Safety In Mines Testing and Research Station of the Department of Resource Industries of the Queensland Government. In this role he worked on frictional ignitions, mine explosions, windblasts, gas drainage and directional drilling including the first surface to in-seam operation in the country in 1991.

In 1994 he started Sigra. Since then the company has grown under his guidance to span mining, gas, civil geotechnical work. Sigra provides services, solutions and products. The work it has undertaken includes gas exploration, mine design and hydroelectric power developments spanning such diverse locations as Arctic Russia to Patagonia.

Sigra’s products include its own instrumentation including stress measurement tools, drill stem test tools, flowmeters and data loggers. It has its own gas and geomechanics laboratories. On the heavier equipment side it manufactures well control systems and packers.

Ian has some 79 publications on such diverse topics as reservoir engineering to piling. He also has multiple patents covering such varied items as mining systems to cyclonic separators.

Venue Information

Arrow Energy

Arrow Energy:

Level 39

111 Eagle Street

Brisbane CBD

Please sign in at reception


Lucie at SPE Qld


The purpose of SPE QLD Special Interest Groups (SIGs) is to create a regular forum for learning, discussion and networking to all interested parties. We will focus on improved and cutting edge technological developments. Work-in-progress, new ideas, and interesting projects are sought. The topics will include case studies, ongoing research, and development. The group meetings will act as a network for members to communicate ideas and solutions to each other. The SIG meeting are open only to the SPE members or special guests.