mshoemaker@scicatoil.com | 713-515-1155 | Houston
mshoemaker@scicatoil.com | 713-515-1155 | Houston
Until now, quantitative minimum stress has been next to impossible to measure far-field, particularly in 3D space. Other industry methods used to infer stress are uncertain and non-unique based on drilling data and frac hit pressure response, or indirect modeling methods that extrapolate / interpolate rock geomechanics to the well pad from significant distance.
Said methods are valuable for corroboration, but data is limited qualitatively to the wellbore only. SciCat however measures stress directly and quantitatively at the well pad, between wells in 3D space, using calibrated mechanical earth models integrated with geomechanics measured in-situ from the inverted seismic moduli.
Assets can now be characterized based on reservoir and completion quality fairways and evaluated basin-wide for longer term development strategies that are less conducive to parent-child and frac hit phenomena, resulting in improved capital efficiency.
Moreover, subsurface data required to measure the stress includes 3D seismic and modern logs, representing data most operators likely have, adding value and further reducing costs.
Lateral and vertical drilling markers for structural in-zone trajectory design and drilling can now be defined based on mineralogy contrasts that define the geomechanics and stress measured by the inverted 3D seismic geomechanics, representing a first step in minimizing drill time for cost reduction.
Quantitative mapping of stress heterogeneity allows for acreage high-grading ahead of the drill bit to identify completion quality "sweet spot" fairways and areas more prone to frac hits and parent-child issues. Cookie-cutter development strategies assume subsurface isotropy and fail to account for rock heterogeneity.
Pre-drill parameterization of fracture geometry models for horizontal landing, well spacing, and engineered treatment design requires an anisotropic in-situ stress measurement defining the vertical and lateral heterogeneity of geomechanical properties defined by the seismic, along horizontal and vertical wellbores.
Changes in geology define intrinsic 3D seismic geomechanics or elastic properties of tight rock that are effectively measured by the seismic directly at the area of interest. SciCat integrates the seismic with mechanical earth models defining near wellbore and far field vertical and horizontal stress variability for interwell frac hit mitigation in 1D and 3D space.
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