2D seismic data

Oil and natural gas exploration -- geology and geophysics
Post Reply
Kerim_spb
Member
Posts: 6
Joined: Fri Oct 06, 2017 3:22 am

2D seismic data

Post by Kerim_spb » Fri Oct 06, 2017 5:15 pm

Dear colleagues,

i'm Phd student and I'm looking for 2D onshore seismic line with the streamer length of about 8 km (4 to the right and 4 to the other side) or bigger. Also, it must be done with the symmetrical survey and with CMP method.
It would be great that I get with the SPS files to be confident geometry is correct.

Thank you for any comment!

GuyM
VIP Member
Posts: 504
Joined: Sat Mar 24, 2012 11:35 pm

Re: 2D seismic data

Post by GuyM » Mon Oct 09, 2017 10:10 pm

"Streamer" is usually of marine data, although land streamers are used in HiRes work.

I don't have a dataset to hand that matches those specifications, but you could try some of these:

http://wiki.seg.org/wiki/Open_data

Kerim_spb
Member
Posts: 6
Joined: Fri Oct 06, 2017 3:22 am

Re: 2D seismic data

Post by Kerim_spb » Wed Oct 11, 2017 4:02 pm

Thank you for answer
I meant survey length instead of streamer indeed. By the way how it would be in English? seismic cable? I'm talking about streamer on land
Following the link you gave me I found some interesting data, maybe that satisfies me
But still, if somebody has such data share if possible

GuyM
VIP Member
Posts: 504
Joined: Sat Mar 24, 2012 11:35 pm

Re: 2D seismic data

Post by GuyM » Thu Oct 12, 2017 3:40 am

For land surveys I think its more common to talk about "active spread length".

With marine surveys a fixed cable (or streamer) is pulled behind the vessel.

With land surveys the equipment is often laid out, but not all of the geophones are "live"; as the shot point moves along the line the spread of "live" phones moves along too. Eventually the "dead" geophones at the back of the cable are moved up to the front, and connected.

The whole process then "rolls along", with the "active spread" in the middle of the cable, and teams picking up the cables and geophones at the rear once the source has moved along, and deploying them to the front.

The kind of survey you are talking about is termed "split spread" because the shotpoint is in the middle of the "live" spread of geophones.

So I'd tend to call it a "split spread survey with a 4000m maximum offset"..

Kerim_spb
Member
Posts: 6
Joined: Fri Oct 06, 2017 3:22 am

Re: 2D seismic data

Post by Kerim_spb » Thu Oct 12, 2017 4:22 pm

Thank you for explanation
This information is useful to express my thoughts and to pose questions

resour
Silver Member
Posts: 20
Joined: Sat Aug 17, 2013 6:01 am

Re: 2D seismic data

Post by resour » Fri Oct 20, 2017 12:53 pm

Hi Kerim,

how many channels are you using per shot ? We support up to 1'000 channels/traces per shot with our Rayfract® Pro license. See

http://rayfract.com

. Also we support interpretation of refracted/diving waves with DeltatV CMP refraction method. For theory see e.g.

http://rayfract.com/pub/deltatv.pdf

and our tutorials

http://rayfract.com/tutorials/ot0608.pdf

and

http://rayfract.com/samples/GEOXMERC.pdf

. Let me know if you have more questions. Thanks, Siegfried.

Kerim_spb
Member
Posts: 6
Joined: Fri Oct 06, 2017 3:22 am

Re: 2D seismic data

Post by Kerim_spb » Fri Oct 20, 2017 4:21 pm

Dear Siegfried,

I'm looking for the data with receiver step less than 50 meters and active spread length 8 kilometers or bigger. So I need more than 160 channels per shot. Also, the shot step should be equal receiver step.
I search for the SEG-Y data in tutorials http://rayfract.com/ but I can't find any.
I can't find where such data is?

With respect,
Kerim

resour
Silver Member
Posts: 20
Joined: Sat Aug 17, 2013 6:01 am

Re: 2D seismic data

Post by resour » Fri Oct 20, 2017 9:19 pm

Hi Kerim,

our tutorials show importing SEG-2 or ASCII formatted data only. However we also support importing SEGY shots since a few years.

Best regards, Siegfried.

Kerim_spb
Member
Posts: 6
Joined: Fri Oct 06, 2017 3:22 am

Re: 2D seismic data

Post by Kerim_spb » Mon Oct 23, 2017 8:27 am

Siegfried,

And can I have this data?
In tutorials I saw only small data. There was not such data as I described in topic
It must be N*100 megabytes I think

with respect, Kerim

Post Reply