psi81 - question (biodegradion)

Hi PSI/ others

I am trying to understand how and why MO-2 (morocco) was found to have been biodegraded due to erosion and exposure of the reservoir to weathering. Questions:

1- normally when you drill updip, your chances of finding something increase? isnt TAO-1 updip to MO-1 and MO-5.. or have I got this wrong?

2- TAO-1 seems a while away from MO-2 and MO-8, seems like La Dam is a lot closer.. shouldnt they be drilling this?

3- When drilling updip normally, does this always increase the risk of biodegradation? Anywhere in the world?

4- Im still trying to understand what biodegradation is and how does it actually work.. i mean, so the oil was once light and now became heavy due to weathering?