Extracting seismic along wells

[Sami]

Hi,

Can you please guide me how to extract seismic along well trajectories.

Thanks

Sami Elkurdy

+1 250 508 0448 (Victoria, BC)

[Paul de Groot]

Hi Sami,

There are a couple of things you can do:

1. Create a random line through selected wells (Random Lines -> New -> From Wells ... menu in the tree)
2. Optionally interactively re-position the line such that deviated well tracks are followed better (drag nodes and insert new nodes where needed)
3. Create an Attribute log from a seismic cube or a seismic attribute. This is a seismic object stored as a log with the well (Well - Create Attribute Log ... menu in the tree). You can do this for all wells in your tree of per well.
4. Create a Log Cube. This is a log of N x N bins around the well track that is stored as a seismic volume at the seismic sampling rate. (Click on the well in the tree and select Well - Create Log Cube ...).

In the image below you see a seismic random line through 2 wells. The seismic is displayed as "Pseudo relief", which is an OpendTect attribute. I manually repositioned the random line to follow the deviated track of PNA-13. I then created an attribute log from the seismic volume and displayed this as a log tube for both wells. Next I created two log cubes from the GR logs. Each log cube covers 10x10 bins. I added two extra display elements to the random line and displayed the log cubes in these elements. These are shown in sand colors along the well tracks. To complete the image I added a deep horizon with an overlay of the RMS of Thinned Fault Likelihood. The RMS is computed with the Volume Statistics attribute with zero stepout in Z and 1 step out in inline and crossline. This is only done to give the TFL a bit more width. 

I hope this helps.

Best regards,

Paul.

-- 

Paul de Groot

Geoscience Manager

Exploring Below - Discovering Beyond                                                                 -----------------------------------------------------------------------------------------------------------------------   dGB Earth Sciences
Phone:	+31 53 43 15 155
E-mail:	paul.d...@dgbes.com
Internet:	dgbes.com , terranubis.com

-----------------------------------------------------------------------------------------------------------------------  

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[Paul de Groot]

Just a small update on my previous reply. There is no need to manually update the random line if you want it to go through the entire well track. There is a toggle in the "create random line from wells" window. The default only goes through the tops. If you set it to No and you specify the starting position (from Top or from Bottom) for each well you can create the random line you want without manual editing afterwards, see example below.

Best regards,

Paul.

-- 

Paul de Groot

Geoscience Manager

Exploring Below - Discovering Beyond                                                                 -----------------------------------------------------------------------------------------------------------------------   dGB Earth Sciences
Phone:	+31 53 43 15 155
E-mail:	paul.d...@dgbes.com
Internet:	dgbes.com , terranubis.com

-----------------------------------------------------------------------------------------------------------------------  

[Sami]

Thank you very much for the guidance.

Sami Elkurdy
+1 250 508 0448 (Victoria, BC)

------ Original Message ------
From: "Paul de Groot" <paul.d...@dgbes.com>
To: us...@opendtect.org
Bcc: selk...@gmail.com
Sent: 8/16/2020 12:49:39 AM
Subject: Re: [OpendTect_Users] Extracting seismic along wells

>Just a small update on my previous reply. There is no need to manually
>update the random line if you want it to go through the entire well
>track. There is a toggle in the "create random line from wells" window.
>The default only goes through the tops. If you set it to No and you
>specify the starting position (from Top or from Bottom) for each well
>you can create the random line you want without manual editing
>afterwards, see example below.
>
>Best regards,
>
>Paul.
>

>image.png
>--
>Paul de Groot
>Geoscience Manager
>
>

>Exploring Below - Discovering Beyond
>-----------------------------------------------------------------------------------------------------------------------
>dGB Earth Sciences
>Phone:+31 53 43 15 155
>E-mail:paul.d...@dgbes.com
>Internet:dgbes.com , terranubis.com
>-----------------------------------------------------------------------------------------------------------------------
>
>
>On Sat, Aug 15, 2020 at 3:51 PM Paul de Groot <paul.d...@dgbes.com>
>wrote:
>>Hi Sami,
>>
>>There are a couple of things you can do:
>>Create a random line through selected wells (Random Lines -> New ->

>>From Wells ... menu in the tree)Optionally interactively re-position

>>the line such that deviated well tracks are followed better (drag

>>nodes and insert new nodes where needed)Create an Attribute log from a

>>seismic cube or a seismic attribute. This is a seismic object stored
>>as a log with the well (Well - Create Attribute Log ... menu in the

>>tree). You can do this for all wells in your tree of per well.Create a

>>Log Cube. This is a log of N x N bins around the well track that is
>>stored as a seismic volume at the seismic sampling rate. (Click on the
>>well in the tree and select Well - Create Log Cube ...).
>>In the image below you see a seismic random line through 2 wells. The
>>seismic is displayed as "Pseudo relief", which is an OpendTect
>>attribute. I manually repositioned the random line to follow the
>>deviated track of PNA-13. I then created an attribute log from the
>>seismic volume and displayed this as a log tube for both wells. Next I
>>created two log cubes from the GR logs. Each log cube covers 10x10
>>bins. I added two extra display elements to the random line and
>>displayed the log cubes in these elements. These are shown in sand
>>colors along the well tracks. To complete the image I added a deep
>>horizon with an overlay of the RMS of Thinned Fault Likelihood. The
>>RMS is computed with the Volume Statistics attribute with zero stepout
>>in Z and 1 step out in inline and crossline. This is only done to give
>>the TFL a bit more width.
>>
>>I hope this helps.
>>
>>Best regards,
>>
>>Paul.
>>

>>image.png
>>--
>>Paul de Groot
>>Geoscience Manager
>>
>>

>>Exploring Below - Discovering Beyond
>>-----------------------------------------------------------------------------------------------------------------------
>>dGB Earth Sciences
>>Phone:+31 53 43 15 155
>>E-mail:paul.d...@dgbes.com
>>Internet:dgbes.com , terranubis.com
>>-----------------------------------------------------------------------------------------------------------------------
>>
>>
>>On Sat, Aug 15, 2020 at 11:57 AM 'Sami' via OpendTect Users
>><us...@opendtect.org> wrote:
>>>Hi,
>>>
>>>Can you please guide me how to extract seismic along well
>>>trajectories.
>>>
>>>Thanks
>>>
>>>
>>>
>>>Sami Elkurdy
>>>+1 250 508 0448 (Victoria, BC)
>>>
>>>
>>>--
>>>You received this message because you are subscribed to the Google
>>>Groups "OpendTect Users" group.
>>>To unsubscribe from this group and stop receiving emails from it,
>>>send an email to users+un...@opendtect.org.
>>>To view this discussion on the web visit
>>>https://groups.google.com/a/opendtect.org/d/msgid/users/em0fb61ebb-b7b0-4da7-85db-2288cfad53c1%40desktop-jaihvc3

>>><https://groups.google.com/a/opendtect.org/d/msgid/users/em0fb61ebb-b7b0-4da7-85db-2288cfad53c1%40desktop-jaihvc3?utm_medium=email&utm_source=footer>.

>
>--
>You received this message because you are subscribed to the Google
>Groups "OpendTect Users" group.
>To unsubscribe from this group and stop receiving emails from it, send
>an email to users+un...@opendtect.org.
>To view this discussion on the web visit

>https://groups.google.com/a/opendtect.org/d/msgid/users/CABuvx8HL3-Qy-kNgbBfwciy57pOuhSwFgWSci%2BxNvS7jErOeLA%40mail.gmail.com
><https://groups.google.com/a/opendtect.org/d/msgid/users/CABuvx8HL3-Qy-kNgbBfwciy57pOuhSwFgWSci%2BxNvS7jErOeLA%40mail.gmail.com?utm_medium=email&utm_source=footer>.