RockPhysics & Quatitative Seismic Interpretation

[ashok]

Hi ShadowRaven,
Can u share the link to the latest edition of "The RockPhysics Handbook" 2009?

[ShadowRaven]

Hi
I have only 2003 version and on DJVU format. You need it?

[ashok]

Hi ShadowRaven,
I would be obliged, if you can share.

btw are u working with rockphysics, QI, AVO, inversion stuff etc? we could also share our experiences too.

[ShadowRaven]

I'm petrophysicist, supporting AVO analysis and to a lesser extend - acoustic/elastic inversions. Let me know if I can be of further assistance

Here we go...
1.

[link Point to another website Only the registered members can access]
2. Back in 2006 I was visiting Oklahoma University, below are some other papers, that could be uploaded as well:

G. Mavko. Fluid Substitution: Estimating changes in Vp without knowing Vs. Geophysics vol 60, 1995.

Rob Simm. The anatomy of AVO crossplots. Feb. 2000

Chis P. Ross. Effective AVO crossplot modeling: A Tutorial. Geophysics, 2000.

J. P. Castagna. Principles of AVO crossplotting. 1997

Dhananjay Kumar. A Tutorial on Gassmann Fluid Substitution: Formulation, Algorithm and Matlab Code. Chevron Energy, Jan 2006.

M.W. Lee. Gas Hydrate and Free Gas Saturations Estimated from Velocity Logs on Hydrate Ridge, Offshore Oregon, USA. ODP vol 204, Jan. 2006.

Zandong Sun. Borehole velocity-prediction models and estimation of fluid saturation effects.

B.H. Russel. Fluid-prioperty discrimination with AVO: A Biot-Gassmann perspective. CREWES Research Report – Vol 13, 2001.

G.M. Hamada. Reservoir Fluid Identification Using Vp/Vs ratio. 2004.

Geophysical Applications: Velocity-Porosity Relationships. Chapter 6.

USGS. Proposed Moduli of Dry Rock and Their Application to Predicting Elastic Velocities of Sandstones. Report 2005-5119.

J Dvorkin. Identifying *****y Saturations from Well Logs.
Grain Sorting, Porosity and Elasticity, 2001. -

[ashok]

Thank bro for the link.
From the papers you have mentioned I have all of them which are published in Geophysics, TLE. Can you upload rest of them?

As a petrophysicist, I believe the first thing you might be doing to support the AVO team is to prepare the log data for their use. So can you share the procedure for QC of the logs and log editing.

And a direct question, how do you predict shear log without using the mudrockline?

[martinncl]

Hi
I have only 2003 version and on DJVU format. You need it?

Hi friends,' The RockPhysics Handbook 2009' or 2003?

Could you please share it ? I am looking for this.

Thanks!

[ShadowRaven]

Ashok, HI
This would be a subject for a paper...

Reconstruction of Vs is possible but you have to have a good set of logs: GR-RHOB, Ne (near and far counts), Pe and Vp; and an offset well with shear data; It all depends on data available and formation complexity.

QC logs: you need to check Caliper (or Caliper-Bit size) and look for wash-outs on density; Bad RHOB vakues should be replaced with reconstructed ones. Always correct your GR and Neutron for a given hole diameter (temperature/type and weight of mud);

If you are dealing with carbonates some normalization might be applied. My assumption here is that in limestone formation there is a tite section (not washed) with a low porosity (2-3%), with RHOB-Pe-Ne-DT values close to a clean calcite.

In soft/unconsolidated sediments (Malaysia, China offshore and Gulf-of-Mexico) often corrected Neutron and corrected/reconstructed density will provide better Vs reconstruction. But I always have 1-2 offset wells with dipole recorded data (i.e. Poisson ratio is a known value)

In certain ‘exotic” formations i.e. volcanics, mixed carbonates calcite+dolomite+shale, Black shales, etc. without offset data I would use possible analogues from Rock Catalogue (Corelab);

In clean sand-shale sequences you might build a trend lines RHOB/Vp/Vs vs. TVD for clean shale and clean wet sand; These trends are natural “boundaries” to cross-check and control reconstructed Vs;

If there is a pay beds in the well where shear should be reconstructed, you should calculate Total/Effective porosities and Sw first and remove Hc effects on RHOB and DTco (Vp) logs before reconstructing Vs.

Final QC for reconstructed Vs would be a) normalization to similar logs in the offset wells and b) calculating Poisson and Vp/Vs ratios to verify that we are still within physical bounds.

PS
I would NEVER use Castagna mudline equation…..

[AlexIvan]

I would NEVER use Castagna mudline equation…..

Dear ShadowRaven!
I'm sorry, I have one question...
Why do you not like the Castagna's equation? What is your reason? Thank you!

[zeng_zihang]

please find few papers on rockphysics on the link below.....

[link Point to another website Only the registered members can access]

why i always couldnot download file?
Thank you

[fuahmad]

Hi ShadowRaven,

I'm petrophysicist, supporting AVO analysis and to a lesser extend - acoustic/elastic inversions. Let me know if I can be of further assistance

Here we go...
1.

[link Point to another website Only the registered members can access]
2. Back in 2006 I was visiting Oklahoma University, below are some other papers, that could be uploaded as well:

G. Mavko. Fluid Substitution: Estimating changes in Vp without knowing Vs. Geophysics vol 60, 1995.

Rob Simm. The anatomy of AVO crossplots. Feb. 2000

Chis P. Ross. Effective AVO crossplot modeling: A Tutorial. Geophysics, 2000.

J. P. Castagna. Principles of AVO crossplotting. 1997

Dhananjay Kumar. A Tutorial on Gassmann Fluid Substitution: Formulation, Algorithm and Matlab Code. Chevron Energy, Jan 2006.

M.W. Lee. Gas Hydrate and Free Gas Saturations Estimated from Velocity Logs on Hydrate Ridge, Offshore Oregon, USA. ODP vol 204, Jan. 2006.

Zandong Sun. Borehole velocity-prediction models and estimation of fluid saturation effects.

B.H. Russel. Fluid-prioperty discrimination with AVO: A Biot-Gassmann perspective. CREWES Research Report – Vol 13, 2001.

G.M. Hamada. Reservoir Fluid Identification Using Vp/Vs ratio. 2004.

Geophysical Applications: Velocity-Porosity Relationships. Chapter 6.

USGS. Proposed Moduli of Dry Rock and Their Application to Predicting Elastic Velocities of Sandstones. Report 2005-5119.

J Dvorkin. Identifying *****y Saturations from Well Logs.
Grain Sorting, Porosity and Elasticity, 2001. -

I get this message....
ERROR

This file is neither allocated to a Premium Account, or a Collector's Account, and can therefore only be downloaded 10 times.

This limit is reached.

To download this file, the uploader either needs to transfer this file into his/her Collector's Account, or upload the file again. The file can later be moved to a Collector's Account. The uploader just needs to click the delete link of the file to get further information.
Can you upload to mediafile or ifile.it or megaupload please,
Thank you bro,
FA

[ashok]

Hi ShadowRaven,
Thanks for your elaborate reply.

I have seen people doing rock physics modelling to predict elastic logs (Vp, Vs, Rho or porosity). eg Xu- White method, Self Consistent method....etc

What is your comment on this?

[zeng_zihang]

I'm petrophysicist, supporting AVO analysis and to a lesser extend - acoustic/elastic inversions. Let me know if I can be of further assistance

Here we go...
1.

[link Point to another website Only the registered members can access]
2. Back in 2006 I was visiting Oklahoma University, below are some other papers, that could be uploaded as well:

G. Mavko. Fluid Substitution: Estimating changes in Vp without knowing Vs. Geophysics vol 60, 1995.

Rob Simm. The anatomy of AVO crossplots. Feb. 2000

Chis P. Ross. Effective AVO crossplot modeling: A Tutorial. Geophysics, 2000.

J. P. Castagna. Principles of AVO crossplotting. 1997

Dhananjay Kumar. A Tutorial on Gassmann Fluid Substitution: Formulation, Algorithm and Matlab Code. Chevron Energy, Jan 2006.

M.W. Lee. Gas Hydrate and Free Gas Saturations Estimated from Velocity Logs on Hydrate Ridge, Offshore Oregon, USA. ODP vol 204, Jan. 2006.

Zandong Sun. Borehole velocity-prediction models and estimation of fluid saturation effects.

B.H. Russel. Fluid-prioperty discrimination with AVO: A Biot-Gassmann perspective. CREWES Research Report – Vol 13, 2001.

G.M. Hamada. Reservoir Fluid Identification Using Vp/Vs ratio. 2004.

Geophysical Applications: Velocity-Porosity Relationships. Chapter 6.

USGS. Proposed Moduli of Dry Rock and Their Application to Predicting Elastic Velocities of Sandstones. Report 2005-5119.

J Dvorkin. Identifying *****y Saturations from Well Logs.
Grain Sorting, Porosity and Elasticity, 2001. -

can u upload your file again.?thanks