Drilling Risk Management

We added:

• acounting for UOM when setting the well logging palette in 3D window
• step-by-step curve import with the ability to set the maximum number of data lines requested at a time (WITSML-client)
• time recording ang additional recording into mud logging interval (WITSML-client)
• defining the mud window taking into account breakout width into WBS window
• recoding into the lithology column
• multivariate calculations using selected parameters into the Geomechanical model
• an option to enter the scale into Visualization window (mud logging data vs time)

Besides:

• now there is no need to recalculate safe mud window when Synthetic image and Synthetic caliper options are enabled in "Well stability" section of WBS window
• the curves from a removed set are automatically combined into one project set in WITSML-client
• "Combining curves" method has been returned to the available methods lists in "Static elastic properties" and "Strength properties" sections of WBS window
• in the Eaton and Bowers methods the lithocolumn is plotted according to the averaged curve during gamma ray logging averaging (previously, averaging had no effect on lithology) in "Pore pressure" section of WBS window
• the values entered in the table are automatically saved without pressing Enter in Zone editing window

We added:

• an option of creating a 1D WBS model, which is a set of well logs containing information on mechanical, strength and other properties, including well stress state
• importing only top zones or using marker data
• custom point dataset creating tool
• «Operations» module for point data
• calculation of a derivative into well logging operations
• description into the well logging window
• cement ring destruction diagram into «Cement ring stability modeling» method
• a movable depth mark line into «Cement ring stability modeling» and «Sand production modeling» methods
• a tree for managing styles and visibility of objects into the 3D window
• modeling clusters by lithology, with or without modeling by zones into «Clustering» module

Besides:

• now calculations are performed in MD (in previous versions they were performed in TVD, which did not allow taking into account horizontal sections of the well)
• «Fracture reactivation» and «Fracture reactivation potential» methods are now combined
• Borehole geometry tool (two-finger caliper) data analysis is now available
• «Fracture reactivation» method is supplemented by depth selection and the Mohr diagram visualization

We added:

• a new mud log data vs time window, which allows forming individual polygonal chain and scale graphs and saving the resulting graph structure in templates
• the ability to visualize zones in the form of a colored interval on an individual track within the log plot with the center caption

Besides:

• the log plot filling option is modified, now it can be set with one color and on both sides of the curve simultaneously
• the user manual is fully updated

We added:

• a hole size and material grain dependence of strength into sand production simulation
• saving the simulation result of one direction fracture propagation (injection induced fracture module)
• managing the case of defined bottomhole pressure exceeding the pressure of crossing data availability interval (injection induced fracture module)
• visualization of the reactivation density upper and lower limits in the «Wellbore stability analysis» method when «Weak plane» option is enabled

Besides:

• the trend curve is now calculated for the entire well trajectory in the well log window (in the previous versions the trend curve was plotted only for the initial well log curve depths)
• the calculation algorithm in «Porothermoelastic dynamic wellbore stability analysis» method was improved

We added:

• wellbore shape 3D visualization into multifinger caliper analysis
• an option of using caliper fingers positioning into multifinger caliper analysis and visualization
• an operation of well log curve shifting along MD

We implemented:

• dynamic modeling module with the option to select a function to describe time dependence of input parameters
• «Porothermoelastic dynamic wellbore stability analysis» method
• «Viscoelastic dynamic wellbore stability analysis» method (Burger's model)
• Options in the «Wellbore stability analysis» method to account for mud cake influence and plastic material properties
• «Sand production modeling» method (Hettema's and Wilson's models)
• «Cement ring stability modeling» method

We added:

• operations for averaging, shifting, stretching and clearing well log values
• 3D window in the Tools menu and also the ability to save the state of this window into a separate project element
• UOM converter
  

We implemented:

• visualization of accumulated histograms and a cumulative curve and quantiles in the histogram window
• Traugott's method for calculating synthetic density
• modification of the dynamic addition to the mud density calculation

We added:

• coloring by filters in the cross-plot window and in the histogram window;
• displaying statistics on clusters in the clustering window;
• Miller's method and Amoco empirical relation for calculating synthetic density;
• linear transformation and stretching / compressing in well log curve operations.

We implemented:

• tectonic regime determination module;
• the ability to set overlapping sections in the construction window;
• sorting by depth when importing well log curves.

We added:

• the ability to define sections of the wellbore open part in the well construction window
• visualization and editing trajectory parameters: rotary table height, ground level height, wellhead height, local sea level height
• accounting for normal compaction trends during properties transfer
• saving plotted polygons in the cross-plot window

We implemented:

• optional display of the determination coefficient R ^ 2 in the curve formula on the graph as well as font selection for the caption with the formula in the cross-plot window
• model of associated porothermoelasticity in critical densities calculation

We added:

• calculation of injection induced fracture height in an injection well;
• calculation of pore pressure in the sandbody in clays (accounting for centroid effect);
• creation of dependencies in the cross-plot tool using multiple wells data;
• possibility to import the trajectory, using three curves: depth, zenith, azimuth (WITSML-client);
• information display table into the preview window (WITSML-client).

We implemented:

• algorithm for estimation of maximum and minimum horizontal stress components using borehole imager data;
• algorithm for estimation of maximum horizontal stress and its direction using borehole imager data on breakout direction and width;
• data synchronization when well logs changing (when simulating in the wellbore stability window, modeling workflow, when upgrading with WITSML-client).

We added:

• an option of calculating and modeling critical density, stereograms, stress diagrams, synthetic images and the caliper taking into account elastic properties anisotropy;
• static elastic properties calculation using the effective model of a layered medium;
• an option of disconnecting from WITSML-server.

We implemented:

• importing data by drag-and-drop on the element of the project tree;
• viewing and editing parametres of methods in the workflow manager;
• data curve operations window, including trend creating, interpolation, value averaging by wavelets, value averaging by facies.

We added:

• loading and visualisation of cubes, maps and polygons;
• clustering module, including clustering by machine learning methods;
• exponent calculating methods for abnormal pressure zones prediction with Eaton's method.

We implemented:

• cube building from WL set and properties profiles building from the cube;
• operation of cube properties interpolation;
• well shape visualisation using multifinger calipers data.

We implemented:

• calculation of model properties by facies with / without zones;
• methods for assessing the physical and mechanical properties of rocks according to well log and mud logs.

We added:

• taking into account bedding planes while calculating critical densities;
• fracture reactivation simulation.

We added:

• an output of friction angle for each given Mohr circle to the strength certificate;
• the ability to display the depth axis on the log plot with the time axis;
• the ability to set input parameters from the keyboard at the selected depth in the stereogram window;
• taking into account osmotic stresses in the calculation of critical densities.

We added:

• new icons and a dark theme option;
• filters by zones and lithotypes, display of the trend line equation to the cross-plot window;
• "Create by Template" option to the log plot;
• sorting and searching for deleted objects in the WITSML client.

We added:

• the tree with data update settings to the online maintenance module to select a method for updating and installing the workflow;
• preview to online tracking module.

Besides:

• the online tracking module implements the loading of time-dependent data;
• User Guide is updated.

New improvements:

• in the correlation editor variable names are checked for compliance with Python language rules;
• the ability to load point data into a separate project element is added;
• equivalent circulating density (ECD) curve and synthetic caliper curve are synchronized.

New improvements:

• 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.

New improvements:

• 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 curve 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.

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 wall collapse, drilling mud loss and long crack formation.

As a result of training, 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 support, 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 RN-SIGMA, work with tools (1.5 hours).

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).