Fracture Gradient Above Overburden

Does anyone know of any published material on Barents Sea fracture gradients which explain why sometimes the fracture gradient is equal to or greater than the overburden gradient?

Reliability in pore pressure measurements

Could someone suggest any articles and/or book about reliability in pore pressure measurements?

Tectonic evolution effect to the existence of overpressure in a basin

I wonder whether tertiary tectonic evolution will give influence to the existence of overpressure in a certain basin or sub-basin? I mean, what kind of tectonic sequence which will be a cause of the existence of overpressure in a basin?

Pore Pressure Prediction In Tight Gas Reservoirs

How can we estimate pore pressure in a tight gas reservoir relying on a conventional log suite? Is there any workflow or correlation?

Pore Pressure Prediction from Seismic Impedance

Does anyone have some information about pore pressure prediction directly from seismic impedance ? How I can calculate required parameters for this purpose?

Eaton's Empirical Equation

For a pore pressure prediction using Eaton's empirical equation, does anyone actually use Katahara's correction of subtracting the velocity at the mud line (Katahara, 2003)? I have found that term adds too much uncertainty if you want to invert for the exponent n, as per Sayers, 2002. 

Pore Pressure Prediction in Tuffaceous Formations

Pore pressure prediction in tuffaceous formations - which methods should be used there? How one can assess the strength of such formation having only basic set of logs (density, neutron porosity, compressional sonic, resistivity)?

Validation of pore pressure prediction

I've have a result of a pore pressure prediction. My question is, how do I validate what I've calculated? Does it has something to do with reservoir pressure or estimated pore pressure from pressure log? 

Estimation of pore pressure in evaporite layers

Does anyone have some information about how to measure and estimate the pore pressure in the evaporite layers, particularly Gachsaran formation in the Iranian oil fields?

Eaton exponent

Has tried Eaton exponent equal to 1.5 or 2 (for PPP from compressional sonic wave velocity)

Rock strength calculation

Does anybody can give some suggestions about rock strength calculation by using DT and GR? Any articles, information, or published papers are highly appreciated.

Mud weight and borehole stability

Can anyone provide links to some useful papers regarding mud weight and borehole stability?

Density extrapolation

I have assumed sediments density at the earth surface in a case in order to calculate overburden stress and gradient and now i have to extrapolate it to the first measurement point on the density log. How this extrapolation will be carried out?

Overpressure mechanism detection

As you know, there is some methods to find overpressure generation mechanism like using velocity, density, porosity and velocity-effective stress cross plots.

Here is the link result for one of my research on carbonate formation, (I know the complexity of PPP in carbonate). I have used velocity-density cross plot and separate the depth intervals by 100 meters: http://i59.tinypic.com/w7243t.png

The top of overpressure is at 2800 meters. As you see in the picture, the velocity-density cross plot below this depth (2800 m) deviates from the NCT to back at above the normal trend.
Which mechanism do you think cause this deviation? Disequilibrium compaction, unloading, chemical diagenesis, or other?

Minimum horizontal stress from logs in an anisotropic environment

What is the experience in estimating the minimum horizontal stress magnitude from logs in an environment exhibiting HTI anisotropy? I have a dipole sonic log which shows anisotropy in some of sands and based on the slowness/frequency behavior we suspect  the measured anisotropy stems from stress imbalances around the wellbore and not from fracturing. 

"Rock mechanics" vs. "geomechanics"

What are your definitions of "rock mechanics" and "geomechanics" and the difference if you believe they are different. Your participation in this discussion is greatly appreciated and will help reaching a consensus within our community.

Effect of fault types on stress regime

Can someone explain how different fault types (dip-slip, strike-slip, etc) tend to affect the stress regime (orientation and magnitude) across them? Is there a specific way how these faults affect the stress regime, individually, or there is no definitive correlation between the fault type and stress variation?

SPE/AAPG/SEG Pore Pressure Workshop Attendees

I know that some of the group are here in San Antonio at the SPE/SEG/AAPG Pore Pressure Workshop. Please feel free to share any thoughts, comments or key learnings that you have of the workshop. Maybe it was a talk you liked, or a common theme or discussion topic you found interesting, or even ideas for future workshops.

Also, please feel free to catch up and say hi! Would be great to meet you.

Breaking NCLT

It has been said that if you "break" Eaton's NCT line (forming a total of two lines), the lines must be parallel to each other. Is there an exception to this rule? If so, what is it based upon?

If there are any references or articles on this, please do not hesitate to mention them.