US 2024/0402384 A1 · INTEGRATIVE WORKFLOW OF CONSTRUCTING MECHANICAL EARTH MODEL (MEM) FOR WELLBORE DRILLING

Abstract

A method of constructing a mechanical earth model (MEM) includes integrating a density logging data set to compute vertical stress and applying correlation models or equations to estimate a pore pressure and mechanical properties. The method also includes calibrating the pore pressure with drill stem test data, calibrating the mechanical properties with laboratory tests on core plugs or on rock cuttings, estimating a minimum horizontal stress using correlation models, and calibrating the minimum horizontal stress with minifrac tests. The method further includes estimating a maximum horizontal stress using the correlation models while assuming one or more correlation parameters, calibrating the maximum horizontal stress with a global pattern of tectonic strains and a basin stress regime, evaluating one or more breakout regions using the MEM, a trajectory of a well, and a geometry of a pilot hole, and comparing the one or more breakout regions and a caliper logging data set.

Claims20

Dependent claims

A method of constructing a mechanical earth model (MEM), comprising:

integrating a density logging data set to compute vertical stress;
applying one or more correlation models or equations to estimate a pore pressure and one or more mechanical properties;
calibrating the pore pressure with drill stem test data;
calibrating the one or more mechanical properties with one or more laboratory tests on a plurality of core plugs or on a plurality of rock cuttings;
estimating a minimum horizontal stress using one or more correlation models;
calibrating the minimum horizontal stress with one or more minifrac tests;
estimating a maximum horizontal stress using the one or more correlation models while assuming one or more correlation parameters;
calibrating the maximum horizontal stress with a global pattern of tectonic strains and a basin stress regime;
evaluating one or more breakout regions using the MEM, a trajectory of a well, and a geometry of a pilot hole;
and
comparing the one or more breakout regions and a caliper logging data set.

8 more elements

A well testing system, comprising:

a pilot hole extending from a surface location to a formation;
a well logging assembly disposed in the pilot hole and configured to perform density logging, performing sonic logging, and performing caliper logging;
a mechanical earth model (MEM) development system coupled to the well logging assembly and positioned at the surface location, wherein the MEM development system is configured to:
integrate a density logging data set to compute vertical stress;
apply one or more correlation models or equations to estimate a pore pressure and one or more mechanical properties;
calibrate the pore pressure with drill stem test data;
calibrate the one or more mechanical properties with one or more laboratory tests on a plurality of core plugs or on a plurality of rock cuttings;
estimate a minimum horizontal stress using the one or more correlation models;
calibrate the minimum horizontal stress with one or more minifrac tests;
estimate a maximum horizontal stress using the one or more correlation models while assuming one or more correlation parameters;
calibrating the maximum horizontal stress with a global pattern of tectonic strains and a basin stress regime;
evaluate one or more breakout regions using the MEM, a trajectory of a well, and a geometry of a pilot hole;
and
compare the one or more breakout regions and a caliper logging data set.

11 more elements

Dependencies are inferred from the claim text.

Integrative workflow of constructing mechanical earth model (mem) for wellbore drilling

Life of this patent

Integrative workflow of constructing mechanical earth model (mem) for wellbore drilling

Life of this patent

Abstract

Claims20