Harvesting an abundance of oil and natural gas resources, the Middle East supplies nearly half of all exports to the global oil market. Middle Eastern countries Iran, Iraq, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates are all members of the Organization of the Petroleum Exporting Countries (OPEC), which pumps roughly 40% of the world's oil, with Saudi Arabia leading the pack for the greatest amount of output. OPEC's crude oil production was 28.7 million barrels per day in the first half of 2009.
MWD/LWD refer to measurement and logging while drilling. The MWD operator measures the path of the wellbore while it is being drilled, and this data is then used to help plan the direction that the well will be drilled. LWD, while sometimes used interchangeably with MWD, refers more to the process of obtaining information about the rock being drilled, while MWD is more about the drilling operation.