Summary of New Features in WELLFLO 7

Version 7.200

 

·               Production Mode - A new ‘Production’ mode is now available for quick and easy modeling of a producing oil or gas well.

 

·               Tubular Database - An industry standard tubular database has been added as an option for selection of tubing and casing dimensions.

 

·               VMG Flash - A new comprehensive set of up-to-date compositional equations of state from Virtual Materials Group is now available as optional VLE (Flash) calculations.

 

·               New Electrically Heated Tubing Option - The ability to model the effect of electrically heated tubing on the hydrodynamic and thermodynamic performance of a well has been added.

 

·               OLGAS2000 2-Phase in Rigsite Mode- The simplified UBD interface ‘Rigsite’ now offers the option to run OLGAS2000 2-phase from ScandPower if licensed for this option.

 

·               Nozzle Diameter Database - A database of nozzle diameters has been added as an option for the drill bit of a BHA for UBD applications.

 

·               OLGAS2000 3-Phase - WELLFLO ‘Expert’ mode now has OLGAS2000 3-phase from ScandPower as an option for 3-phase flow modeling.  Contact Neotec to activate this license.

 

·               Plotting Improvements - Changes have been made to the plotting system to allow synchronization of axes, improve appearance, add scaling features, and save settings for future plots.

Version 7.133

 

·               Rigsite Mode - WELLFLO now supports a ‘Rigsite’ GUI mode that is specially designed for quick and easy data entry for UBD modeling.

 

·               Deliverability Curve XML File - The option to create an XML file containing deliverability curve information has been added.  This deliverability curve information can then be imported into PIPEFLO.  This option is only available for a Wellhead Performance parametric case.

 

·               Individual Rates Option - An ‘Individual Rates’ option was added to IPR Flow Basis selections for a ‘Total Flow Per Section’ IPR in the production casing.

 

·               Single Section IPR Option - A ‘Single Section IPR’ option has been added to the production casing, so that a user can add a single IPR section that is independent of the casing geometry.

 

·               Ignore Facility Option - An ‘Ignore this Facility’ check has been added to all tubing and production casing facilities (Point Source, Injection Point, Choke, BHA and ESP).  When this option is selected, the data entry screens for the facility will be disabled, the facility will not appear on the schematic, and the facility will not be used in any calculations.

 

·               Calculation Improvements

-          The Thermal Expansion method used to compute specific gravity from relative gravity or vice versa has been updated to now permit temperatures greater than 500 degrees Fahrenheit.  Temperatures greater than 500 degrees Fahrenheit now generate a warning message.

-          Point source and Injection Point facilities now post stream warning messages.

-          The minimum cuttings transport ratios for horizontal, inclined and vertical flow are now reported in the summary output file.

-          IPR curves are now generated anytime that a bottom hole IPR is present. 

-          The valid range for entropy values has been expanded from -10 to 10 BTU/lb-deg F to -20 to 20 BTU/lb-deg F.

-          The Watson Modified Oil Enthalpy correlation has been upgraded to now support a negative API oil gravity.

 

·               XML Fluid Import/Export Improvements - Minor modifications have been made to the XML fluid import/export capabilities to improve their usability.

 

·               Multiple Residuals - In previous versions, the user was restricted to a single residual in a case.  This restriction has been removed.

 

·               Frictional Quality Multiplier for Foam - The user specifiable foam properties now include a frictional quality multiplier.

 

·               New Plotting Design - A new plotting package has replaced the previous one in NeoGraph.  One of the more significant options in this new plotting package is the ability to plot two separate X axes against a common Y axis.

 

Version 7.120

  

·               ESP Facility and Database – An Electric Submersible Pump can now be added anywhere in the well to apply artificial lift.  Users can enter their own performance data, choose from a database of commercial ESP’s, or customize the existing database.

 

·               ESP Performance Curve Parametric Option – Using the WELLFLO 7 parametric data option, the performance of an installed ESP can be evaluated over a range of flow rates or bottom-hole pressures.

 

·               Power Management – Especially for laptop users, an automated “power down” no longer causes the Neotec security to fail due to inactivity.

 

·               Transient Buried Heat Transfer Environment – Well bore heating/cooling can now be analyzed using a time-dependent heat transfer computation based on the work of Ramey (1962), Willhite (1967), and Shinohara (1979).  This development was motivated by the requirements of geothermal well analysis but is also applicable for any injection, production, or circulation system with potential transient thermal concerns (i.e. hydrate formation).

 

·               Helium Addition to Compositional and Limited Compositional – Helium has now been added as a new component in the fluid property library.

 

·               Eclipse Table Generation Changes – The results from a well performance analysis can now be automatically tabulated and output to an Eclipse™ compatible file for processing by that reservoir simulator.

 

·               Injection Point Facility – At any depth in the well, additional fluid can be added to the well to account for an injection point.  This could be used to simulate chemical injection or artificial lift as the result of parasitic tubing injection, continuous gas-lift, or concentric annulus injection.

 

·               Parametric Injection Point Capabilities – Performance curves for multiple injection rates can be generated using the parametric data option for a range of pressures or flow rates in the well.  This is especially useful to determine hydraulically optimum gas-lift rates.

 

·               User Defined Unit Sets – Units for each and every data item in the user interface can be selected independently and saved in a custom Unit Set which can ultimately be shared with other users.

 

·               Calculation Engine Changes – The non-compositional gas enthalpy prediction has been expanded beyond the previous limit of 3000 psia, to 6000 psia.  The corresponding non-compositional oil enthalpy prediction has been improved to include a pressure and oil gravity dependence.

 

·               Output Plot and Report Changes 

-          NeoGraph has been modified to display only the filename (as opposed to the full path and filename) when multiple XLS plot files are displayed for comparison.

-          The P02 diagnostic file has been modified to report the temperature profile across the various layers from the tubing to the surroundings.

-          The gas max volume fraction for injection cases is now reported in the mini, maxi and summary output files.

-          Both the per case and summary XLS output files now report the wellhead and bottom hole pressures in their respective injection point tables.

-          The in situ gas volume fraction is now reported in the detailed report section of the .max output file and the XLS output file.  Additionally a gradient plot is now available to display the in situ gas volume fraction.

-          The estimated height of the static column of liquid for injection or production cases if the well is shut in is now reported in the .min, .max and .sum output files.  Additionally, the measured depth to the top of the static column of liquid is reported in the summary section of the .min and .max output files.

-          The cumulative liquid holdup and cumulative gas pack for both production and injection cases as well as the total for circulating cases is now reported in the summary section of the mini and maxi output files and the summary output file.

-          The cuttings transport ratio is now reported in the detailed results section of the .max output report. 

 

·               Fluid Import/Export Capabilities – In the Fluid Manager, users can now import or export fluid definitions to facilitate the sharing, and storage, and retrieval, of fluid characterizations whether compositional or non-compositional.

 

·               Water Saturation Calculation – An option for computing the gas saturated water mole fraction has now been added to the compositional data entry screens.  This provides a convenient way of characterizing the fluid molar composition to include only water of saturation in the gas phase.

 

·               ‘What’s New in this Version’ Help menu item – An option on the Help menus now reveals a brief list of the new features contained in the current release.

 

·               Wellhead and Bottomhole Stream Labeling Changes for Drilling – Labels on various data entry screens have been changed to be more suitable for drilling applications when the relevant options are selected.

 

·               User Defined Initial Guess for Reverse Pressure Calculation – For difficult convergence cases where an iterative calculation is requested, a new option allows entry of an initial guess to speed up the solution search algorithm.

 

·               ‘Save As’ button on Main Toolbar