About ResToolbox3
ResToolbox3 is a petroleum engineering calculator built for engineers who need answers fast - on a rig floor, in a meeting, or on a plane. PVT analysis, nodal analysis, gas hydrate prediction, production forecasting,...
ResToolbox3 is a petroleum engineering calculator built for engineers who need answers fast - on a rig floor, in a meeting, or on a plane. PVT analysis, nodal analysis, gas hydrate prediction, production forecasting, volumetric calculations, and well testing, all from your iPhone or iPad. FLUID PROPERTIES (PVT) - Gas PVT: Z-factor, viscosity, compressibility, pseudo-pressure, water content, and thermal properties via 5-component Peng-Robinson EOS. Handles CO2, H2S, N2, H2, and hydrocarbon mixtures including pure and high-concentration cases - Oil PVT: Bubble point, solution GOR, formation volume factor, viscosity, and compressibility using Valko-McCain and Velarde correlations. Three solve modes with scaling factors for GOR and viscosity - Brine & Rock: Soreide-Whitson mutual solubility with Spivey brine correlations. Gas composition from Gas PVT flows through automatically GAS HYDRATES - Hydrate formation prediction via Motiee and Towler-Mokhatab correlations - Thermodynamic inhibitor dosing for MEG, DEG, TEG, methanol, and ethanol - Interactive P-T stability curves with inhibited and uninhibited envelopes - Water content mass balance between reservoir and operating conditions NODAL ANALYSIS - Gas and oil well inflow performance (IPR) with non-Darcy flow and Vogel - Outflow performance (VLP) via four methods: Woldesemayat-Ghajar, Hagedorn-Brown, Beggs & Brill, and Gray - 3x3 sensitivity matrix or real-time Explorer mode with interactive sliders - Water cut modelling with physics-based two-phase flow - Injection well support PRODUCTION FORECASTING - Single-well decline profiles: hyperbolic, exponential, and harmonic - Two-stage decline with continuous slope matching - Multi-well field development with drilling schedule, plateau constraints, and abandonment rate VOLUMETRICS - Deterministic OGIP and OOIP with combined gas/oil mode - Monte Carlo probabilistic analysis with Normal, Log-Normal, and Triangular distributions - Exceedance probability curves with P90, P50, and P10 reporting WELL TEST & TOOLS - Choke flow: gas mode (Gilbert, Norsok, TAM, SLB) and oil mode (Gilbert, Ros, Baxendell, Achong) - AGA-3 orifice metering for gas and ISO 5167 for liquid - Gas flowline pressure drop: 30-segment Darcy-Weisbach with PR-EOS properties at each segment, plus Weymouth and Panhandle B empirical methods - Petrophysics: Archie equation with density, sonic, and direct porosity methods, Pickett plot - Gas heating value and composition - Pipe capacities database (tubing, casing, drill pipe) - Unit converter with HC equivalents, reciprocal GOR/CGR, and density-gradient conversions DESIGNED FOR THE FIELD - iPhone-first interface with iPad responsive layouts - Oilfield and Metric unit systems with one-tap toggle - Share results and charts via email or messaging - Available in English, Norwegian, French, Chinese, Spanish, and Arabic - Works fully offline - no internet connection required - PVT properties flow between modules automatically All calculations use published, peer-reviewed methods from SPE literature and industry-standard references. No proprietary correlations, no curve-fitted shortcuts. Tabular data exports let you paste results directly into Excel or Google Sheets.
Version History NEW - Saved Cases (More tab): save every screen's inputs under a name, for example one case per well, and load them back later. - Your inputs are kept between launches on every calculator, and the shared gas, oil, brine, well and decline data carry over. - Export: CSV tables from every calculator with curves or profiles, and simulator keywords (PVTO, PVDO, PVDG, PVTW) from the PVT screens. - Liquid loading: the critical rate is marked on each Nodal outflow curve and on the Outflow VLP chart. - Outflow: pressure, temperature, gradient and liquid holdup against depth at the operating point. - Nodal injection: each curve runs from zero to the maximum injectable rate. - Nodal sensitivity takes a third value for each variable (3 x 3). - Field Development: plateau length, peak wells online and time to abandonment. - Probabilistic volumes: tornado chart. Deterministic volumes: recovery factor, recoverable volume and hydrocarbon pore volume. - Choke solves for the bean size that gives a target rate. Gas Heating Value can send its gas to Gas PVT. - Tablets: inputs on the left, results and charts on the right. ACCURACY - Gas well outflow: dry gas and gas with a trace of water now give the same bottomhole pressure. Woldesemayat-Ghajar, Gray and Beggs-Brill overstated it (Beggs-Brill by up to 13%), and Woldesemayat-Ghajar no longer fails for dry gas. - Nodal critical rate treated the water rate as a ratio (up to about 16% off); corrected. - Gas Well Skin in metric units: rate unit and D conversion corrected. - Gas Bg (0.03% low) and Oil Bo (0.045% high): exact constants. - Field Development uses the Well Profile decline values at full precision and holds the plateau as new wells come on. - Probabilistic histogram: equal-width bins and no false spike at the top end. USABILITY - Results update as you type on most screens. - The app follows the device language on first launch; the language picker is under More. - Oil PVT: choose whether you know Rsb, Pb or both. - Units read the same everywhere; Inflow shows the absolute open flow (AOF). - Cleaner charts: round axis values, no cut-off or repeated labels, and Bt on its own log chart. - Each calculator links to its section of Calculation Methods. Pipe Capacities moved to Tools. 3.0.7 Oct 4 NEW - Gas Well Skin tool: non-Darcy coefficient (β, D) and partial-penetration skin. - The Methods page is now fully translated into all six languages. ACCURACY - Water content of gas: corrected upward where the gas carries significant water (up to about 6% at 350 °F and 4000 psia, more near the boiling curve). It is no longer shown below the water vapour pressure. - Brine PVT: updated viscosity for dissolved gas and multi-salt brines, and refitted gas partial molar volumes. - Oil PVT: Pb and Rsb now round-trip on Valko-McCain; heavy-oil viscosity above Pb uses Standing; undersaturated compressibility follows McCain. - Gas Hydrates: inhibitor dosing uses the published Østergaard (2005) correlation with its pressure term and needs less inhibitor (methanol at 1000 psia: 21 wt% instead of 28 wt%). Requirements beyond the data range are flagged. - Nodal and Outflow: the same well now gives the same bottom-hole pressure on both screens; Hagedorn-Brown accounts for water in oil wells; dissolved gas is included in all oil methods; Beggs & Brill and Gray corrections; condensate uses a live-liquid viscosity. - Gas choke (TAM/SLB): rates were 5-15% low; corrected. - Liquid orifice metering: rates were up to 21% high at large beta; corrected. - Forecast: field-development cumulatives are exact (were 1-4% low); two-stage declines are continuous at the stage change; exponential fits are no longer biased low. USABILITY - Decimal commas (3,5) are accepted on every screen. - Screens opened in metric mode now convert their default values correctly. - PVT pressures and temperatures outside the correlation range give a warning instead of blocking the calculation. - Clearer Nodal sensitivity entry errors, and zero is accepted where it is valid. - Injection operating points are no longer labelled unstable. - Smoother Gas Hydrates input. 3.0.6 Sep 27 - More accurate gas PVT at high pressures. - Improved brine water-content convergence near saturation. - Metric-mode fixes in Nodal Analysis, including non-Darcy flow. - Nodal Explorer: unit switching no longer resets outflow data. - Cleaner PVT property charts with better zoom on narrow ranges. - Stability and polish improvements throughout. 3.0.5 Apr 19 Improvements: - Nodal analysis: Skin values clamped with Peaceman -0.75 correction - popup dialog explains the limit when values are adjusted - Nodal analysis: Injectivity denominator guard prevents division-by-zero edge cases Fixes: - Keyboard dismisses when tapping outside input fields on all screens - iOS keyboard overlay no longer obscures input fields - Resolved all Dart analyzer warnings 3.0.4 Mar 23 New Features: - Appearance settings — choose between Auto, Light, or Dark theme mode - Dark mode support throughout the app with optimized colors and contrast Improvements: - Explorer mode: smart slider limits that scale with input values (permeability, pay height, CGR, excess GOR, FTHP) — no more clipped ranges for high-perm or thick reservoirs - FTHP slider capped at reservoir pressure in production mode; scales above Pr in injection mode - Tubing/casing ID sliders properly convert to metric units - Segmented button text contrast improved in dark mode - Localised app store descriptions and screen captures Fixes: - Unit toggle color corrected for dark theme AppBar - Dark mode text readability across all segmented controls 3.0.3 Mar 21 What's New - PVT screens (Gas, Oil, Brine) now preserve results when switching between tabs - Standardized chart axis formatting across all screens - Improved chart tooltip readability - Methods & References section in share reports Bug Fixes - Fixed crash when running Probabilistic Volumes on iOS - Fixed layout error with notification messages 3.0.2 Mar 20 - Oil PVT: Bt two-phase FVF on secondary log-scale axis - Brine PVT: pressure-sweep charts (Rsw, Bw, Cw) with saturated vs gas-free comparison - Undersaturated Co and Cw compressibility - All screens now update reactively - no Calculate button needed - Improved PVT data flow between modules - VLP performance optimisations - Bug fixes: Oil Co discontinuity, Outflow scaling, Brine Cw correction 1.01 Mar 14 1.0 Mar 11
Previous Versions
Here you can find the changelog of ResToolbox3 since it was posted on our website on 2026-07-09 11:42:59.
The latest version is 3.0.7 and it was updated on 2026-10-14 05:25:06. See below the changes in each version.
ResToolbox3 version 3.0.7
Updated At: 2026-10-14
Changes: Version History NEW
- Saved Cases (More tab): save every screen's inputs under a name, for example one case per well, and load them back later.
- Your inputs are kept between launches on every calculator, and the shared gas, oil, brine, well and decline data carry over.
- Export: CSV tables from every calculator with curves or profiles, and simulator keywords (PVTO, PVDO, PVDG, PVTW) from the PVT screens.
- Liquid loading: the critical rate is marked on each Nodal outflow curve and on the Outflow VLP chart.
- Outflow: pressure, temperature, gradient and liquid holdup against depth at the operating point.
- Nodal injection: each curve runs from zero to the maximum injectable rate.
- Nodal sensitivity takes a third value for each variable (3 x 3).
- Field Development: plateau length, peak wells online and time to abandonment.
- Probabilistic volumes: tornado chart. Deterministic volumes: recovery factor, recoverable volume and hydrocarbon pore volume.
- Choke solves for the bean size that gives a target rate. Gas Heating Value can send its gas to Gas PVT.
- Tablets: inputs on the left, results and charts on the right.
ACCURACY
- Gas well outflow: dry gas and gas with a trace of water now give the same bottomhole pressure. Woldesemayat-Ghajar, Gray and Beggs-Brill overstated it (Beggs-Brill by up to 13%), and Woldesemayat-Ghajar no longer fails for dry gas.
- Nodal critical rate treated the water rate as a ratio (up to about 16% off); corrected.
- Gas Well Skin in metric units: rate unit and D conversion corrected.
- Gas Bg (0.03% low) and Oil Bo (0.045% high): exact constants.
- Field Development uses the Well Profile decline values at full precision and holds the plateau as new wells come on.
- Probabilistic histogram: equal-width bins and no false spike at the top end.
USABILITY
- Results update as you type on most screens.
- The app follows the device language on first launch; the language picker is under More.
- Oil PVT: choose whether you know Rsb, Pb or both.
- Units read the same everywhere; Inflow shows the absolute open flow (AOF).
- Cleaner charts: round axis values, no cut-off or repeated labels, and Bt on its own log chart.
- Each calculator links to its section of Calculation Methods. Pipe Capacities moved to Tools. 3.0.7 Oct 4 NEW
- Gas Well Skin tool: non-Darcy coefficient (β, D) and partial-penetration skin.
- The Methods page is now fully translated into all six languages.
ACCURACY
- Water content of gas: corrected upward where the gas carries significant water (up to about 6% at 350 °F and 4000 psia, more near the boiling curve). It is no longer shown below the water vapour pressure.
- Brine PVT: updated viscosity for dissolved gas and multi-salt brines, and refitted gas partial molar volumes.
- Oil PVT: Pb and Rsb now round-trip on Valko-McCain; heavy-oil viscosity above Pb uses Standing; undersaturated compressibility follows McCain.
- Gas Hydrates: inhibitor dosing uses the published Østergaard (2005) correlation with its pressure term and needs less inhibitor (methanol at 1000 psia: 21 wt% instead of 28 wt%). Requirements beyond the data range are flagged.
- Nodal and Outflow: the same well now gives the same bottom-hole pressure on both screens; Hagedorn-Brown accounts for water in oil wells; dissolved gas is included in all oil methods; Beggs & Brill and Gray corrections; condensate uses a live-liquid viscosity.
- Gas choke (TAM/SLB): rates were 5-15% low; corrected.
- Liquid orifice metering: rates were up to 21% high at large beta; corrected.
- Forecast: field-development cumulatives are exact (were 1-4% low); two-stage declines are continuous at the stage change; exponential fits are no longer biased low.
USABILITY
- Decimal commas (3,5) are accepted on every screen.
- Screens opened in metric mode now convert their default values correctly.
- PVT pressures and temperatures outside the correlation range give a warning instead of blocking the calculation.
- Clearer Nodal sensitivity entry errors, and zero is accepted where it is valid.
- Injection operating points are no longer labelled unstable.
- Smoother Gas Hydrates input. 3.0.6 Sep 27 - More accurate gas PVT at high pressures.
- Improved brine water-content convergence near saturation.
- Metric-mode fixes in Nodal Analysis, including non-Darcy flow.
- Nodal Explorer: unit switching no longer resets outflow data.
- Cleaner PVT property charts with better zoom on narrow ranges.
- Stability and polish improvements throughout. 3.0.5 Apr 19 Improvements:
- Nodal analysis: Skin values clamped with Peaceman -0.75 correction - popup dialog explains the limit when
values are adjusted
- Nodal analysis: Injectivity denominator guard prevents division-by-zero edge cases
Fixes:
- Keyboard dismisses when tapping outside input fields on all screens
- iOS keyboard overlay no longer obscures input fields
- Resolved all Dart analyzer warnings 3.0.4 Mar 23 New Features:
- Appearance settings — choose between Auto, Light, or Dark theme mode
- Dark mode support throughout the app with optimized colors and contrast
Improvements:
- Explorer mode: smart slider limits that scale with input values (permeability, pay height, CGR, excess GOR,
FTHP) — no more clipped ranges for high-perm or thick reservoirs
- FTHP slider capped at reservoir pressure in production mode; scales above Pr in injection mode
- Tubing/casing ID sliders properly convert to metric units
- Segmented button text contrast improved in dark mode
- Localised app store descriptions and screen captures
Fixes:
- Unit toggle color corrected for dark theme AppBar
- Dark mode text readability across all segmented controls 3.0.3 Mar 21 What's New
- PVT screens (Gas, Oil, Brine) now preserve results when switching between tabs
- Standardized chart axis formatting across all screens
- Improved chart tooltip readability
- Methods & References section in share reports
Bug Fixes
- Fixed crash when running Probabilistic Volumes on iOS
- Fixed layout error with notification messages 3.0.2 Mar 20 - Oil PVT: Bt two-phase FVF on secondary log-scale axis
- Brine PVT: pressure-sweep charts (Rsw, Bw, Cw) with saturated vs gas-free comparison
- Undersaturated Co and Cw compressibility
- All screens now update reactively - no Calculate button needed
- Improved PVT data flow between modules
- VLP performance optimisations
- Bug fixes: Oil Co discontinuity, Outflow scaling, Brine Cw correction 1.01 Mar 14 1.0 Mar 11
ResToolbox3 version 3.0.7
Updated At: 2026-10-06
Changes: Version History NEW
- Saved Cases (More tab): save every screen's inputs under a name, for example one case per well, and load them back later.
- Your inputs are kept between launches on every calculator, and the shared gas, oil, brine, well and decline data carry over.
- Export: CSV tables from every calculator with curves or profiles, and simulator keywords (PVTO, PVDO, PVDG, PVTW) from the PVT screens.
- Liquid loading: the critical rate is marked on each Nodal outflow curve and on the Outflow VLP chart.
- Outflow: pressure, temperature, gradient and liquid holdup against depth at the operating point.
- Nodal injection: each curve runs from zero to the maximum injectable rate.
- Nodal sensitivity takes a third value for each variable (3 x 3).
- Field Development: plateau length, peak wells online and time to abandonment.
- Probabilistic volumes: tornado chart. Deterministic volumes: recovery factor, recoverable volume and hydrocarbon pore volume.
- Choke solves for the bean size that gives a target rate. Gas Heating Value can send its gas to Gas PVT.
- Tablets: inputs on the left, results and charts on the right.
ACCURACY
- Gas well outflow: dry gas and gas with a trace of water now give the same bottomhole pressure. Woldesemayat-Ghajar, Gray and Beggs-Brill overstated it (Beggs-Brill by up to 13%), and Woldesemayat-Ghajar no longer fails for dry gas.
- Nodal critical rate treated the water rate as a ratio (up to about 16% off); corrected.
- Gas Well Skin in metric units: rate unit and D conversion corrected.
- Gas Bg (0.03% low) and Oil Bo (0.045% high): exact constants.
- Field Development uses the Well Profile decline values at full precision and holds the plateau as new wells come on.
- Probabilistic histogram: equal-width bins and no false spike at the top end.
USABILITY
- Results update as you type on most screens.
- The app follows the device language on first launch; the language picker is under More.
- Oil PVT: choose whether you know Rsb, Pb or both.
- Units read the same everywhere; Inflow shows the absolute open flow (AOF).
- Cleaner charts: round axis values, no cut-off or repeated labels, and Bt on its own log chart.
- Each calculator links to its section of Calculation Methods. Pipe Capacities moved to Tools. 3.0.7 1d ago NEW
- Gas Well Skin tool: non-Darcy coefficient (β, D) and partial-penetration skin.
- The Methods page is now fully translated into all six languages.
ACCURACY
- Water content of gas: corrected upward where the gas carries significant water (up to about 6% at 350 °F and 4000 psia, more near the boiling curve). It is no longer shown below the water vapour pressure.
- Brine PVT: updated viscosity for dissolved gas and multi-salt brines, and refitted gas partial molar volumes.
- Oil PVT: Pb and Rsb now round-trip on Valko-McCain; heavy-oil viscosity above Pb uses Standing; undersaturated compressibility follows McCain.
- Gas Hydrates: inhibitor dosing uses the published Østergaard (2005) correlation with its pressure term and needs less inhibitor (methanol at 1000 psia: 21 wt% instead of 28 wt%). Requirements beyond the data range are flagged.
- Nodal and Outflow: the same well now gives the same bottom-hole pressure on both screens; Hagedorn-Brown accounts for water in oil wells; dissolved gas is included in all oil methods; Beggs & Brill and Gray corrections; condensate uses a live-liquid viscosity.
- Gas choke (TAM/SLB): rates were 5-15% low; corrected.
- Liquid orifice metering: rates were up to 21% high at large beta; corrected.
- Forecast: field-development cumulatives are exact (were 1-4% low); two-stage declines are continuous at the stage change; exponential fits are no longer biased low.
USABILITY
- Decimal commas (3,5) are accepted on every screen.
- Screens opened in metric mode now convert their default values correctly.
- PVT pressures and temperatures outside the correlation range give a warning instead of blocking the calculation.
- Clearer Nodal sensitivity entry errors, and zero is accepted where it is valid.
- Injection operating points are no longer labelled unstable.
- Smoother Gas Hydrates input. 3.0.6 Sep 27 - More accurate gas PVT at high pressures.
- Improved brine water-content convergence near saturation.
- Metric-mode fixes in Nodal Analysis, including non-Darcy flow.
- Nodal Explorer: unit switching no longer resets outflow data.
- Cleaner PVT property charts with better zoom on narrow ranges.
- Stability and polish improvements throughout. 3.0.5 Apr 19 Improvements:
- Nodal analysis: Skin values clamped with Peaceman -0.75 correction - popup dialog explains the limit when
values are adjusted
- Nodal analysis: Injectivity denominator guard prevents division-by-zero edge cases
Fixes:
- Keyboard dismisses when tapping outside input fields on all screens
- iOS keyboard overlay no longer obscures input fields
- Resolved all Dart analyzer warnings 3.0.4 Mar 23 New Features:
- Appearance settings — choose between Auto, Light, or Dark theme mode
- Dark mode support throughout the app with optimized colors and contrast
Improvements:
- Explorer mode: smart slider limits that scale with input values (permeability, pay height, CGR, excess GOR,
FTHP) — no more clipped ranges for high-perm or thick reservoirs
- FTHP slider capped at reservoir pressure in production mode; scales above Pr in injection mode
- Tubing/casing ID sliders properly convert to metric units
- Segmented button text contrast improved in dark mode
- Localised app store descriptions and screen captures
Fixes:
- Unit toggle color corrected for dark theme AppBar
- Dark mode text readability across all segmented controls 3.0.3 Mar 21 What's New
- PVT screens (Gas, Oil, Brine) now preserve results when switching between tabs
- Standardized chart axis formatting across all screens
- Improved chart tooltip readability
- Methods & References section in share reports
Bug Fixes
- Fixed crash when running Probabilistic Volumes on iOS
- Fixed layout error with notification messages 3.0.2 Mar 20 - Oil PVT: Bt two-phase FVF on secondary log-scale axis
- Brine PVT: pressure-sweep charts (Rsw, Bw, Cw) with saturated vs gas-free comparison
- Undersaturated Co and Cw compressibility
- All screens now update reactively - no Calculate button needed
- Improved PVT data flow between modules
- VLP performance optimisations
- Bug fixes: Oil Co discontinuity, Outflow scaling, Brine Cw correction 1.01 Mar 14 1.0 Mar 11
ResToolbox3 version 3.0.6
Updated At: 2026-10-02
Changes: Version History NEW
- Gas Well Skin tool: non-Darcy coefficient (β, D) and partial-penetration skin.
- The Methods page is now fully translated into all six languages.
ACCURACY
- Water content of gas: corrected upward where the gas carries significant water (up to about 6% at 350 °F and 4000 psia, more near the boiling curve). It is no longer shown below the water vapour pressure.
- Brine PVT: updated viscosity for dissolved gas and multi-salt brines, and refitted gas partial molar volumes.
- Oil PVT: Pb and Rsb now round-trip on Valko-McCain; heavy-oil viscosity above Pb uses Standing; undersaturated compressibility follows McCain.
- Gas Hydrates: inhibitor dosing uses the published Østergaard (2005) correlation with its pressure term and needs less inhibitor (methanol at 1000 psia: 21 wt% instead of 28 wt%). Requirements beyond the data range are flagged.
- Nodal and Outflow: the same well now gives the same bottom-hole pressure on both screens; Hagedorn-Brown accounts for water in oil wells; dissolved gas is included in all oil methods; Beggs & Brill and Gray corrections; condensate uses a live-liquid viscosity.
- Gas choke (TAM/SLB): rates were 5-15% low; corrected.
- Liquid orifice metering: rates were up to 21% high at large beta; corrected.
- Forecast: field-development cumulatives are exact (were 1-4% low); two-stage declines are continuous at the stage change; exponential fits are no longer biased low.
USABILITY
- Decimal commas (3,5) are accepted on every screen.
- Screens opened in metric mode now convert their default values correctly.
- PVT pressures and temperatures outside the correlation range give a warning instead of blocking the calculation.
- Clearer Nodal sensitivity entry errors, and zero is accepted where it is valid.
- Injection operating points are no longer labelled unstable.
- Smoother Gas Hydrates input. 3.0.6 4d ago - More accurate gas PVT at high pressures.
- Improved brine water-content convergence near saturation.
- Metric-mode fixes in Nodal Analysis, including non-Darcy flow.
- Nodal Explorer: unit switching no longer resets outflow data.
- Cleaner PVT property charts with better zoom on narrow ranges.
- Stability and polish improvements throughout. 3.0.5 Apr 19 Improvements:
- Nodal analysis: Skin values clamped with Peaceman -0.75 correction - popup dialog explains the limit when
values are adjusted
- Nodal analysis: Injectivity denominator guard prevents division-by-zero edge cases
Fixes:
- Keyboard dismisses when tapping outside input fields on all screens
- iOS keyboard overlay no longer obscures input fields
- Resolved all Dart analyzer warnings 3.0.4 Mar 23 New Features:
- Appearance settings — choose between Auto, Light, or Dark theme mode
- Dark mode support throughout the app with optimized colors and contrast
Improvements:
- Explorer mode: smart slider limits that scale with input values (permeability, pay height, CGR, excess GOR,
FTHP) — no more clipped ranges for high-perm or thick reservoirs
- FTHP slider capped at reservoir pressure in production mode; scales above Pr in injection mode
- Tubing/casing ID sliders properly convert to metric units
- Segmented button text contrast improved in dark mode
- Localised app store descriptions and screen captures
Fixes:
- Unit toggle color corrected for dark theme AppBar
- Dark mode text readability across all segmented controls 3.0.3 Mar 21 What's New
- PVT screens (Gas, Oil, Brine) now preserve results when switching between tabs
- Standardized chart axis formatting across all screens
- Improved chart tooltip readability
- Methods & References section in share reports
Bug Fixes
- Fixed crash when running Probabilistic Volumes on iOS
- Fixed layout error with notification messages 3.0.2 Mar 20 - Oil PVT: Bt two-phase FVF on secondary log-scale axis
- Brine PVT: pressure-sweep charts (Rsw, Bw, Cw) with saturated vs gas-free comparison
- Undersaturated Co and Cw compressibility
- All screens now update reactively - no Calculate button needed
- Improved PVT data flow between modules
- VLP performance optimisations
- Bug fixes: Oil Co discontinuity, Outflow scaling, Brine Cw correction 1.01 Mar 14 1.0 Mar 11
ResToolbox3 version 3.0.5
Updated At: 2026-09-25
Changes: Version History - More accurate gas PVT at high pressures.
- Improved brine water-content convergence near saturation.
- Metric-mode fixes in Nodal Analysis, including non-Darcy flow.
- Nodal Explorer: unit switching no longer resets outflow data.
- Cleaner PVT property charts with better zoom on narrow ranges.
- Stability and polish improvements throughout. 3.0.5 Apr 19 Improvements:
- Nodal analysis: Skin values clamped with Peaceman -0.75 correction - popup dialog explains the limit when
values are adjusted
- Nodal analysis: Injectivity denominator guard prevents division-by-zero edge cases
Fixes:
- Keyboard dismisses when tapping outside input fields on all screens
- iOS keyboard overlay no longer obscures input fields
- Resolved all Dart analyzer warnings 3.0.4 Mar 23 New Features:
- Appearance settings — choose between Auto, Light, or Dark theme mode
- Dark mode support throughout the app with optimized colors and contrast
Improvements:
- Explorer mode: smart slider limits that scale with input values (permeability, pay height, CGR, excess GOR,
FTHP) — no more clipped ranges for high-perm or thick reservoirs
- FTHP slider capped at reservoir pressure in production mode; scales above Pr in injection mode
- Tubing/casing ID sliders properly convert to metric units
- Segmented button text contrast improved in dark mode
- Localised app store descriptions and screen captures
Fixes:
- Unit toggle color corrected for dark theme AppBar
- Dark mode text readability across all segmented controls 3.0.3 Mar 21 What's New
- PVT screens (Gas, Oil, Brine) now preserve results when switching between tabs
- Standardized chart axis formatting across all screens
- Improved chart tooltip readability
- Methods & References section in share reports
Bug Fixes
- Fixed crash when running Probabilistic Volumes on iOS
- Fixed layout error with notification messages 3.0.2 Mar 20 - Oil PVT: Bt two-phase FVF on secondary log-scale axis
- Brine PVT: pressure-sweep charts (Rsw, Bw, Cw) with saturated vs gas-free comparison
- Undersaturated Co and Cw compressibility
- All screens now update reactively - no Calculate button needed
- Improved PVT data flow between modules
- VLP performance optimisations
- Bug fixes: Oil Co discontinuity, Outflow scaling, Brine Cw correction 1.01 Mar 14 1.0 Mar 11
Disclaimer
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