QUOTE(azraeil @ Mar 10 2012, 08:06 PM)
1. Is it possible to determine the OWC from Seismic data
Answer: yes, usually if the contact can be clearly seen (if you are lucky), it will be a flat spot on the seismic line which is indicative of presence of hydrocarbon. Bear in mind that the seismic vertical resolution is nowhere near as good as log data, you will have an uncertainty range of +- 30 metres.
How often can you see the contact from seismic? - Not very often. In fact, I would surmise, very rarely. Only if you are in the right place at the right time maybe (proper geometry during seismic acquisition etc)
2. It will be almost impossible to come up with an FDP without Log Data. Why was the data not given to you? I would understand if you guys are doing a data review with other companies, but if you are supposed to come up with an FDP, then you need all the data you can get.
3. Is it possible to drill into the fault?
Answer: Of course you can .... BUT people try to avoid the fault for a lot of reason. In Malaysia especially with the silt content, most faults will probably be a sealing fault (not always, maybe a 50-50 chance) but if the fault is sealing, the pressure on the hanging wall (if it's a normal fault) may be different from the footwall of the fault. In a lot of cases, you try to avoid it because different pressure regime in different fault blocks will cause all sort of drilling headaches as the well is drilled with specific mud weight at specific reservoir and pressure regime, so if you cross the fault into a different pressure regime, you can get worse case scenario, the BP Deepwater Fiasco. Now you don't want to do that right
so u r saying dat the best way to determine the OGC n WOC is by log data rite?
actually, the field was given to us for our final sem project. other groups have been given with tonnes of log data but not us. i guess, it's impossible for us to come out with the FDP with zero log data. to make things worst, the MDT-GR data were given to us was only from 1 wildcat well while we have about 12 wildcat wells in the map. i guess there's no way for us to determine the type of formation, the type of reservoir, the formation pressure, etc since we can't correlate those 12 wildcat wells right?
owh, that's a new info for me knowing dat the footwall n the roofwall of the fault are different in pressure. i wish i can show u the complication that we are facing right now with the numbers of the fault available in our field
it seems impossible for us to drill if we are going to avoid all the fault at all. let say if we want to drill on the fault, the only thing that we can do is to change the mud weight everytime we drill along it, right?
QUOTE(ICDeadPeople @ Mar 10 2012, 10:01 PM)
Im going to add points to what mr azreail said. But to answer your most important qs, no, i dont accept debit card
You can theoritically can see contacts in seismic, which what they call dhi (direct hydrocarbon indicator). Probelm with dhi is you cant tell what kind of fluid you encounter, is it owc, gwc, goc. Infact even a soluble gas in the water can give you a booming amplitude which can be mistaken as hydrocarbon. And as what azraeil said, it quite rare to find this dhi, especially the one you are confident with. You need significant thick clean sand, with multi darcy permeability. Infact i only remember seing one good dhi in my experience doin fdp.
From what you said you got mdt-gr data from well test. I assume there you know the fluid (mdt), possible contact (also mdt), and possible type of reservoir and its quality (gr).
So thereotically you can generate fluid distribution map on your depth map (using estimated contact from mdt). I think you should be able to build x-section map from this, even with 24 faults.
hahahaha can i use wang pos then?
the biggest problem for us is that the MDT-GR data that we have is only from 1 well. please correct me if i'm wrong but i don't think it's possible to generate a fluid distribution map only by referring to 1 wildcat well data.
seriously, we really don't know what to do next. i think we'll ask to change the field coz it seems impossible to come out with a FDP with these type of datas
Mar 10 2012, 02:58 PM
Quote
...maybe they are looking for experianced heads+the cream and crops.
0.0278sec
0.88
6 queries
GZIP Disabled