Irrgang Reservoir Management
Upstream Oil and Gas Consultants
Principle Consultant – Henry Irrgang, BSc. (Hons Maths), U Syd, MEngSc UNSW
Consultant – Dr Rosemary Irrgang, BSc, MEngSc, PhD, U Syd, MEngSc (Petroleum Eng) UNSW
Henry Irrgang
Henry has 39 years experience in Reservoir Engineering, working with companies including Esso, Cairn Energy and Oil Search and AWE. Has been a consultant sinceDesigned courses and lectured in Exxon Production Research Co’s inaugural Reservoir Management School.
SPE Section Chairman 1998 – 2008
Not a plug and play guy, he loves deriving equations from first principles. Deep knowledge of reservoir flow behaviour, geology and geophysics. Can spot a dodgy assumption at 10 paces.
Has worked on field developments and acquisitions in New Guinea, India, Indonesia, USA, Tunisia, Yemen, UK and China as well as most areas of Australia and New Zealand.
Henry was on long term contract with AWE for 17 years providing reservoir management advice for all of AWE’s producing assets, exploration and new venture evaluations.
Key participant in the evaluation, acquisition and reservoir development planning for the Ande Ande Lumut offshore heavy oil field in Indonesia, including successful divestment of 50%.
Responsible for Tui area Reservoir Development. Seconded to AWE JV partners, e.g. ROC Oil for the Cliff Head Field Reservoir Development.
Rosemary Irrgang
Rosemary has been with IRM since 2006.
She worked as a Research Scientist with CSIRO until 2003, the last 10 years on Genesis, a project to produce drilling optimisation software.
Enrolled in a Petroleum Engineering Master’s degree, graduating in 2005 with a High Distinction average. Henry helped by pointing out errors in the Professor’s lecture notes. Fortunately this was appreciated.
