Seminar - Chemical Reactions of Cements in Geothermal Wells, Dr. Neil Milestone, Callaghan Innovation

Seminar - Chemical Reactions of Cements in Geothermal Wells, Dr. Neil Milestone, Callaghan Innovation

Room PG 2.02, Post Graduate Centre, Heriot-Watt University, Riccarton, Currie EH14 4AS

Tuesday July 22nd, 2014 from 12:00 – 13:30

The cement in a geothermal well plays several important roles. It must provide a seal between the production fluids and the casing to ensure the steam can be delivered to the surface in a controlled way; it ensures the different zones within the well continue to remain isolated from each other; it provides support to the casing; and it provides corrosion protection for the steel casing. In addition it must withstand temperatures up to over 300oC, high pressures and often acidic conditions. Traditionally, the cement formulations used for wells have been based on Portland cement with additions of over 30% fine quartz flour to avoid “strength retrogression” due to formation of alpha C2SH.

In this seminar, Dr. Milestone will describe his work on the development of new cement systems that have the potential to greatly outperform traditional calcium silicate (‘Portland’) formulations in terms of their strength, durability, acid resistance and their ability to be incorporated into lightweight cement bodies. These materials have current applications that include geothermal wells and in wider infrastructure sectors.

About the Speaker

Dr. Neil Milestone DSc., PhD is a Distinguished Research Fellow at Callaghan Innovation Wellington and Wairarapa, New Zealand http://www.irl.cri.nz/ and Senior Researcher in Cement, Industrial Research Limited. He received his Doctor of Science on silicate chemistry from the University of Wellington in 2000 and his PhD from the University of Waikato in 2003.

To reserve your place at this event, RSVP S.Sidhu@hw.ac.uk; tel: 0131 451 8370