Density_Neutron Crossover (Oil or Gas) ??

[yasiobasio123]

Hi Friends,

How can we say that it is Oil or Gas, keeping in view the Density-Neutron Crossover?
Besides this, what else method can confirm that there is gas or oil except Density-Neutron crossover?

Look forward to hearing.

Thanx

[Land_Mark]

Hi,

1. Hydrocarbon shows; (a) Gas Chromatography - Look for high methane concentration.
(b) Oil stains on cuttings - Characterized by florescence of some sort.
Both of these will show up on a mud log. Also lookout for any kick information, like gas kicks (gas) and liquid kicks (oil).

2. Look for segregation/contacts; neutron-density will show the biggest cross-over in gas, then smaller cross-over in oil, then overlie each other in 100% water.

Markus

[yasiobasio123]

Thanks for reply.

Can you tell which curves (C1, C2, C3, C4, nC4 etc) confirm the presence of gas?
Similarly which for Oil?

Thankx