Geomechanics
Turn sonic and density curves into a calibrated wellbore stability answer: elastic properties, overburden, pore pressure, rock strength, horizontal stresses, and the safe mud weight window, computed in your browser, on well data that never leaves your machine.
Geomechanics runs as a compute mode inside the Formation Evaluation workspace, so it reads the same LAS and DLIS curves, depth reference, zones, and unit system as the rest of your interpretation. Outputs are written back as depth curves you can plot in the log viewer, overlay against calibration points, and export with the case.
Geomechanics is part of Formation Evaluation and is included from the Starter plan. Projects save to a folder on your computer and do not count toward Starter's cloud saved-case limit. See pricing
Every output is a continuous curve along the wellbore, computed sample by sample from your input logs:
Nothing is a black box. You pick the correlation, you see the parameters, and the reference is on screen:
A model that has not been calibrated is a guess. Import RFT/MDT formation pressure points as CSV and overlay them on the computed pore pressure curve, add LOT and FIT points in ppg EMW to check the fracture gradient, and fit the sonic or resistivity normal compaction trend directly to your own shale intervals instead of accepting a default.
Vertical-well shortcuts break down as soon as the well builds angle. Switch the wellbore to deviated and the far-field stress tensor is rotated into borehole coordinates using inclination, well azimuth, and SHmax azimuth (per-sample survey data overrides the constants where you have it), so the mud weight window reflects the trajectory you are actually drilling.
At any depth you choose, the Zoback stress polygon shows which stress regimes are frictionally admissible for your overburden, pore pressure, and friction coefficient, with your computed Shmin and SHmax plotted inside it. It is the fastest way to sanity-check whether a stress model is physically possible before anyone drills on it.
Geomechanics inherits the Formation Evaluation local-first model. Logs, cases, and computed curves live in a project folder you choose on your computer through the browser File System Access API. We do not store well log files or interpretation cases in our database, and the geomechanics computation itself runs entirely in your browser.
Build the pre-drill mud weight window from offset well logs, then narrow it as calibration points arrive.
Explain breakouts and losses after the fact by comparing the drilled mud weight against modelled collapse and breakdown pressures.
Screen drawdown limits with the sanding CBHFP curve before committing to a completion design.
Track pore pressure against the normal compaction trend to see where a section departs from hydrostatic.
No. If a DTS curve is present it is used directly. Where it is missing, shear slowness is synthesized from compressional slowness using the Castagna mudrock relation or Greenberg–Castagna with a lithology you select (sandstone, limestone, dolomite, or shale), and the synthesized curve is labelled as such so nobody mistakes it for a measurement.
Eaton from sonic, Eaton from resistivity, and Bowers from sonic with optional unloading for exhumed or unloaded sections. Normal compaction trends can be fitted to your own shale intervals rather than left at library defaults, and predicted pressure can be overlaid against imported RFT/MDT points.
Yes. In deviated mode the far-field stress tensor is rotated into borehole coordinates using well inclination, well azimuth, and SHmax azimuth, with per-sample survey data taking precedence over constant values. Collapse and breakdown pressures are then solved around the inclined borehole rather than assuming a vertical well.
Unconfined compressive strength comes from a log correlation you choose: McNally for sandstone, Horsrud for shale, or Golubev & Rabinovich for carbonate. Internal friction angle is either a constant you set or derived from compressional velocity using Lal, and tensile strength is taken as a configurable fraction of UCS.
It is a compute mode inside the Formation Evaluation workspace, included from the Starter plan alongside the rest of Formation Evaluation. There is no separate geomechanics licence, and results share the same case file, unit system, and export path as your petrophysical interpretation.
No. The geomechanics computation runs in your browser and the project folder lives on your computer. Well log files and interpretation cases are not stored in our database. DLIS conversion is the one server round-trip on the platform, and the uploaded file is not retained.
Geomechanics is one of the compute modes inside Formation Evaluation, alongside multimineral solving, permeability estimation, saturation-height modelling, pressure analysis, and synthetic seismograms.
