Engineering workflow calculators
Connected calculations for a single engineering case, with consistent inputs, reproducible examples and explicit limits.
Local simulation workbench
PR/crystal and wax equilibrium, reactive carbonate chemistry, and native steady/transient 3-D flow with portable checked results.
Coupled PR Vapor-Liquid-Liquid-Wax Flash Calculator
Solve vapor, two liquids and pure C18 crystal amounts together, with a depleted-fluid flash, crystal complementarity and component-balance checks.
Open workflowFinite-Inertia Eccentric Annular Navier-Stokes CFD Calculator
Solve coupled cross-sectional Navier-Stokes velocity and relative pressure in a rotating eccentric annulus with mesh, momentum and energy checks.
Open workflowMixed-Gas Hydrate Onset and Cage Occupancy Calculator
Compare sI and sII hydrate onset for a methane-rich gas using guest fugacities, supplied water activity and explicit Langmuir cage occupancies.
Open workflowPeng-Robinson Fluid Phase-Envelope Continuation Calculator
Trace both C1-C6 bubble and dew branches through the critical neighborhood, correcting native continuation seeds and auditing every returned equilibrium state.
Open workflowNonideal Two-Wax Multisolid Equilibrium Calculator
Minimize Gibbs energy for one regular-solution liquid and separate C18/C20 crystals with material balance, convexity and solid-stability checks.
Open workflowCoupled Concentric Helical Herschel-Bulkley Flow Calculator
Solve axial pressure-driven and rotational annular flow together with one HB stress invariant, no-slip constraints and mechanical power closure.
Open workflowEccentric Helical HB Creeping-Flow FEM Calculator
Solve all three velocity components and cross-sectional pressure in an eccentric annulus using regularized HB rheology and mixed finite elements.
Open workflowSingle-Phase Pipe Water-Hammer Transient Calculator
Trace pressure waves after prescribed downstream velocity closure with a fixed reservoir, Darcy friction, grid refinement and absolute-pressure cavitation rejection.
Open workflowFormation Thermal History, Shut-In and Restart Calculator
Track a well segment and surrounding rock through heating/cooling, shut-in and restart using radial heat diffusion, thermal storage and energy-conserving matrix exponentials.
Open workflowFour-Cut Gamma C7+ Characterization and PR Flash Calculator
Split a measured C7+ mean into four bounded gamma cuts and inspect the PR phase split, cut properties and molecular-weight closure.
Open workflowHeavy-End PR Interaction Parameter PVT Fit Calculator
Fit one methane/heavy-cut interaction parameter to fixed-temperature pressure and vapor-mole-fraction observations, with sensitivity and residual checks.
Open workflowFour-Cut C7+ Heat-Duty and Isenthalpic Flash Calculator
Solve a heavy-mixture pressure-drop energy flash using an explicitly supplied heavy ideal-gas heat-capacity fit and four characterized C7+ cuts.
Open workflowExpanded Gas and Isomer PR Flash Calculator
Calculate PR phase equilibrium for C1-C6, iC4/iC5, N2, CO2 and H2S with pinned ChemSep PR pairs and explicit missing-pair assumptions.
Open workflowWet-Mixture Three-Phase PR Screening Calculator
Explore vapor and up to two PR liquids with water, light hydrocarbons and noncondensables, while identifying assumed versus database interaction parameters.
Open workflowPeng-Robinson Isentropic Expansion and Compression Calculator
Find a fixed-composition PR outlet state at equal entropy and a specified pressure, with ideal shaft work and equilibrium closure checks.
Open workflowHydrocarbon Bubble and Dew Pressure Band Calculator
Calculate thirty audited PR saturation endpoints across a bounded temperature band without claiming a complete critical or retrograde phase envelope.
Open workflowThree-Stage Hydrocarbon Separator Train Calculator
Remove vapor at three prescribed PT stages, carry only liquid forward and check overall component and interstage energy balances.
Open workflowCoupled Hydrocarbon Thermal and Pressure Profile Calculator
Solve local PR equilibrium, pressure and temperature together with prescribed heat transfer, friction, elevation and changing kinetic energy.
Open workflowSlip-Aware Hydrocarbon Thermal Pressure Profile Calculator
Couple local PR phase change, prescribed drift-flux holdup, pressure and total energy along a short upward hydrocarbon interval.
Open workflowHydrocarbon Homogeneous Equilibrium Critical Mass Flux Calculator
Find a bounded isentropic ideal-nozzle mass-flux maximum with PR phase equilibrium, rather than applying an ideal-gas choke formula to a changing mixture.
Open workflowIdeal Single-Wax Solubility and Precipitation Calculator
Inspect ideal liquid/pure-solid equilibrium for one wax molecule using supplied fusion data and an explicit component material balance.
Open workflowPure-Water Ice Ih Melting Temperature and Margin Calculator
Invert the IAPWS ice Ih melting curve at absolute pressure and compare it with a supplied pure-water temperature.
Open workflowHerschel-Bulkley Rotational Couette Torque Calculator
Solve low-inertia concentric-cylinder HB rotation, torque, yielded radius and dissipation with exact stress balance and no-slip integral closure.
Open workflowC7+ Characterization and PR Flash Calculator
Estimate one C7+ pseudocomponent from measured molecular weight and specific gravity, then calculate its Peng-Robinson equilibrium split with C1-C6.
Open workflowPeng-Robinson Heat-Duty and Isenthalpic Flash Calculator
Solve PR outlet temperature and equilibrium compositions after a pressure drop with prescribed heat input; zero heat input gives an isenthalpic C1-C6 flash.
Open workflowSRK Heat-Duty and Isenthalpic Flash Calculator
Solve SRK outlet temperature and equilibrium compositions after a pressure drop with prescribed heat input; zero heat input gives an isenthalpic C1-C6 flash.
Open workflowPeng-Robinson Hydrocarbon PT Flash Calculator
Flash a C1-C6 hydrocarbon mixture with Peng-Robinson: equilibrium phase compositions, vapor mole/mass fractions, densities and closure checks.
Open workflowSoave-Redlich-Kwong (SRK) Hydrocarbon PT Flash Calculator
Calculate a C1-C6 hydrocarbon equilibrium split with the SRK EOS and compare phase compositions, vapor fractions and densities with Peng-Robinson.
Open workflowYield-Stress Annular Laminar/Turbulent Friction Calculator
Calculate eccentric yield-power-law annular friction with a self-consistent local flow index, effective diameter and roughness-aware turbulent branch.
Open workflowCoupled Water-Steam Thermal and Pressure Profile Calculator
Integrate water/steam pressure, enthalpy, temperature and equilibrium vapor fraction with heat exchange, friction, acceleration and elevation.
Open workflowEccentric Power-Law Annular Pressure Loss Calculator
Estimate eccentric annular laminar/turbulent friction using power-law rheology, effective diameter and wall roughness, with both branch losses.
Open workflowRamey Wellbore Liquid Temperature Profile Calculator
Estimate liquid temperature and heat exchange along a wellbore with geothermal gradient, tubing resistance and long-time formation conduction.
Open workflowBeggs-Brill Inclined Gas-Liquid Pressure Drop Calculator
Estimate short-segment gas/liquid pressure loss and holdup with Beggs-Brill regime selection, inclination corrections and measured local properties.
Open workflowHerschel-Bulkley Annular Pressure Loss Calculator
Solve concentric laminar yield-power-law annular flow at a specified rate, retaining radial curvature, both yield surfaces and a moving plug.
Open workflowVertical Drift-Flux Gas-Liquid Pressure Profile Calculator
Compare slip-aware and no-slip upward gas/liquid profiles using calibrated drift-flux inputs, phase momentum, friction and liquid holdup.
Open workflowConcentric Laminar Annular Pressure Loss Calculator
Calculate exact Newtonian concentric-annulus friction loss and the radial velocity profile, with geometry and conservative laminar-range checks.
Open workflowHomogeneous Gas-Liquid Pressure Profile Calculator
Integrate an isothermal no-slip gas/liquid screening profile with friction, elevation and gas-expansion acceleration, checked against momentum closure.
Open workflowLocal Porosity-Permeability Calibration Calculator
Fit a local log-linear porosity/permeability transform to measured core pairs, with residuals, extrapolation warnings and portable saved-work files.
Open workflowDAK and Hall-Yarborough Gas Z-Factor Solver
Solve DAK and Hall-Yarborough gas compressibility factors from reduced pressure and temperature, with checked residuals and a pressure comparison curve.
Open workflowHerschel-Bulkley Rheology Fitting Calculator
Fit yield stress, consistency and flow exponent to shear-rate/stress measurements with bounded nonlinear least squares, residuals and saved-work exports.
Open workflowCement Volume and Sacks Calculator
Calculate annular cement volume, planned excess, whole sacks and mixing water from hole geometry and laboratory slurry yield.
Open workflowArps Decline Curve Forecast Calculator
Forecast production rate and cumulative oil with exponential, hyperbolic and harmonic decline over a defined time horizon.
Open workflowStanding vs Vasquez-Beggs PVT Comparison
Compare saturated solution gas-oil ratio correlations over absolute pressure, with transparent coefficient selection and applicability checks.
Open workflowLinked Drilling Hydraulics Calculator
Link hydrostatic pressure, measured annular pressure loss, ECD, annular velocity and volume using one consistent set of drilling inputs.
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