Has a monoploy on oil
Your question is not specific enough to be clear as to what information you desire. Since this is not my area of expertise, I searched Google under the key words "oil monopoly" to get these possible sources:
http://www.fff.org/freedom/0592c.asp
http://reformation.org/oil-monopoly.html
http://www.globalpolicy.org/security/oil/2003/0426byzantine.htm
(Broken Link Removed)
http://www.cbiz.cn/NEWS/showarticle.asp?id=2124
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. If not, you can either continue the search or repost your question in more specific terms. Thanks for asking.