The Memorial Institute for the Prevention of Terrorism has some very useful freely downloadable publications, accessible by clicking on the link below:
http://www.mipt.org/terrorism/MIPT-Publications.asp
One, entitled Terrorism and Energy Security, makes a particularly interesting read. The report focuses not just on practical issues to secure the oil industry, but on the issue of energy security in general, which it defines as:
Energy security refers to the continued, reliable availability of such energy sources in sufficient quantities at reasonably stable and acceptable costs to importing countries and consumers. By implication, it also means the security of those infrastructures that lie between the point the energy is extracted and the consumer – pumps, pipelines, refineries, ships, trucks, storage tanks, gas stations, etc.
To download the Terrorism and Energy Security report click here.