Crude oil benchmarks and production places I discovered recently that there are 3 main price indicators for crude oil (used by the IMF): WTI, Dubaï, and UK Brent. If I understand correctly, each place trades some specific kind of oil (with more or less sulfur among other), which is related to the production place.

Is there some stylized facts, or a precise matrix available, which relate the production place and the price index?

My first guess was OPEC production $\Rightarrow$ Dubai and US production $\Rightarrow$ WTI but I'm not sure regarding the UK Brent...
This article states:


  Brent, WTI and Dubai-Oman are the main crude oil benchmarks of 
  the current oil pricing system. Nearly all oil traded outside America and the Far East is priced using Brent as a benchmark. WTI is the main benchmark used for pricing oil imports  into  the  USA.  Dubai-Oman  is  used  as  a  benchmark  for Gulf  crudes (Saudi Arabia, Iran, Iraq, the UAE, Qatar and Kuwait) sold in the Asia-Pacific market. 


Regarding where the oil is produced, according to Investopedia:


  “Brent” actually refers to oil from four different fields in the North Sea: Brent, Forties, Oseberg and Ekofisk. [...] WTI refers to oil extracted from wells in the U.S. and sent via pipeline to Cushing, Oklahoma. [...] [Dubai-Oman is a] “basket” product consisting of crude from Dubai, Oman or Abu Dhabi.


The above is sometimes visualised in the following map: