Solving the geomechanical problems in wellbore stability analysis for directional and horizontal well drilling.
Drilling Risk Management
Solving the geomechanical problems in wellbore stability analysis for directional and horizontal well drilling.
New versions of
In histogram window the addition of several curves from different wells including, the addition of filters by zones and lithotypes has been implemented.
Converters Pressure - Gradient, Gradient - Pressure are added to the tools
Tree with data update settings has been added to the online maintenance module to select a method for updating and installing a workflow
The online tracking module implements the loading of time-dependent data
Preview added to online tracking module
User Guide Updated
Implemented online drilling support module
The graph for drilling data has been modified - curves can be placed on separate tracks as on a tablet
Implemented loading, storage and display of mud log data, sludge traces
In correlation editor variable names are checked for compliance with Python language rules
Added the ability to load point data into a separate project element
Equivalent circulating density (ECD) curve and synthetic caliper curve are synchronized
The inclination and azimuth dependencies of critical densities are improved
The correlation library is complemented
The crosshole property transfer module improved
Wellbore stability analysis with account of strength anisotropy introduced
Project well property transfer with account of several reference wells implemented
Well data and geomechanical model export to
Recovering horizontal deformations method using well imaging data introduced
New petroelastic modeling methods are introduced
A new pore pressure calculating method introduced using point data of fluid density changes with depth
Savig and display options expanded for cross-plot and histogram objects
Equivalent circulating density (ECD) profile now can be edited using context menu option
Variable in log calculator now can be renamed
The inclination and azimuth dependencies of critical densities are introduced
The depth for stress diagrams and density stereograms now can be set interactively using 3D well trajectory window
The correlation library is complemented
All functions from pandas, scipy and numpy libraries can now be used under 'pd', 'sp', and 'np' aliases in well log calculator and correlation editor
Type and measurement units now can be corrected for loaded well log curve
Logical operations description is added to the correlation editor
Density log is the basis for recovering a lot of reservoir parameters. The main source of information on rock density is density gamma-gamma-ray logging. This kind of logging cannot be held in the conductor area thus its log requires a recovery procedure up to the surface.
Geostatic pressure is the pressure of overlying rocks. The geostatic load is equivalent to the weight of the overlying stratum of sediments (rocks and fluids) at any point in the earth's crust and can be determined using density log recovered up to the surface.
Pore pressure is the fluid pressure in a rock pores. Methods for determining pore pressure: hydrostatic pressure calculation, Eaton and Bowers methods with clay line determination, and also method using given pore pressure gradient.
A saturated porous medium can be characterized by three elastic moduli: Young's module, Poisson's ratio, and poroelasticity coefficient. Dynamic elastic moduli can be used in correlations recovering static ones.
Strength characteristics are parameters determining the critical loads , the excess of which leads to the material destruction. Three main parameters can be measured: uniaxial compression strength, tensile strength and internal friction angle.
Horizontal stresses are lateral stresses that arise in a rock under the rock pressure and tectonic forces influence. The main method of determination is direct calculation using function of rock and pore pressure and tectonic deformation values.
Safe Mud Density Window is the equivalent circulating density (ECD) range that guarantees the absence of critically dangerous incidents during well drilling operation, e.g. reservoir fluid inflow, borehole collapse, drilling mud loss and long crack formation.
This tool can significantly reduce the project development time in the presence of several reference wells.
The developers of
A set of implemented tools allows to perform a full cycle workflow on data gathering, analyzing and pre-processing, building and transferring one-dimensional geomechanical models, predicting drilling complications arising from geological reasons, optimizing the wellbore trajectory and construction and calculating a safe drilling mud density window.
New versions of
WITSML server data aquisition while drilling will clarify the pre-drilling geomechanical model and improve complications prediction quality in unstable rock intervals.
The solutions with time-dependent properties will allow the wellbore stability calculations to be performed with the dynamic conditions during drilling process in the near-wellbore zone. Dynamic modeling main advantage is estimating the acceptable time between the moment of opening an unstable interval to the time of well casing.
Monitoring the near-wellbore zone condition during wellbore operation needs to take into account the influence of well production pressure on the stress state in the vicinity of the wellbore.
3D modeling alows to solve drilling problems in difficult geological conditions.
Regular training activities help to improve the efficiency of use and accelerate the process of RN-SIGMA software product implementation in workflows.
As the traing result the course participants get knowledge about the subject and task of geomechanics in the drilling wellbore processes and skills of work with RN-SIGMA software.
The target audience of this course includes specialists in drilling planning and tracking, geomechanics and related fields.
Lecture on the theory of geomechanics with practical examples (3.5 + 3.5 hours).
Lecture on principles and general approaches to the construction of one-dimensional geomechanical models (2 hours).
Acquaintance with
An example of building a one-dimensional model of wellbore stability (3.5 hours).
Independent work with a ready-made sample of data, or with examples of participants (5 hours).
Examples of working with auxiliary modules (2 hours).
We have conducted 9 trainings in Ufa, Moscow and Tyumen during 2 years. More than 100 participants took part in our training courses.