A satellite-enabled peek at Saudi oil.

Friday, June 20, 2008

North Ghawar Updated

Using the updated Google Earth view (and DigitalGlobe imagery) for Ghawar which includes the Shedgum area, here is an update of the comparison of where older (before 2000) and later wells have been placed.



In the left image, red and blue placemarks indicate locations of oil and water wells respectively. In the right image, green circles denote recent well locations and diamonds indicate drilling rigs.

If the area with remaining oil were an island, it would be time to look for a boat. And given the number of wells involved (400+, probably each with large reservoir contact), this suggests an interesting dynamic in maintaining production at historic levels.

8 comments:

Anonymous said...

wow

Pique Oil said...

So if I am reading this correctly, it means the productive zone has moved to the centre of the field?
If so we must be close to the point of putting our heads between our legs and kissing you know what goodbye.
I am fascinated by your work, Thank you for the obviously huge amount of time you spend on this.'

JoulesBurn said...

Correct, pique oil. The injected water moves in towards the center, and the dry area (with significant oil thickness) is getting smaller and smaller. The onther thing of note is the large number of new wells which are draining oil from a smaller area.

Pique Oil said...

And I assume that most of these new wells are horizontal and have lots of branches. And thus they are draining more oil and faster, so when they slow down it will be like cantarell?.
If so , then it tends to make the claims of plenty of reserve capacity look very ill indeed.

Anonymous said...

This is amazing work. So will Khurais manage to stabilize the decline from Ghawar or Saudi's are headed for a production decline aka $200 barrel.

Anonymous said...

How did you guys come to the conclusion that productive zone has moved to the centre of the field?

JoulesBurn said...

"Top of the field" is referring to the center of the field. The older wells are away from the center, towards the east and west flanks. As those wells produce too much water, they need to be shut off. Newer wells are drilled in the middle, which is generally located higher in elevation. "Top of the reservoir" might be more clear.

Anonymous said...

I check the site regularly. Am looking forward to updates.

-PM