Formation Water Properties
Lender-grade brine density, viscosity, Bw, and gas-in-water calibrated to your salinity and temperature — ready to drop into a reserve audit or borrowing-base bridge.
The problem
Reserve auditors and RBL bankers need defensible formation water properties before they can sign off on brine handling cost, produced-water economics, or aquifer support assumptions. The McCain and Spivey correlations are buried in 1990s textbooks, and the spreadsheets that exist on most teams disagree by 8–15% on Bw. One wrong density assumption can swing a $30M borrowing base by 8% — or hand a buyer a free $4M concession at LOI.
What you get
- →Lender-grade brine density (g/cc, ppg, lb/ft3), viscosity (cp), compressibility (1/psi), Bw (rb/STB), and gas-in-water (scf/STB) calibrated to your salinity and temperature.
- →Downloadable XLSX you can drop into a credit memo or reserve report appendix.
- →Cited correlations (McCain 1990, Spivey 2004) so an audit committee or reservoir engineer can verify the math without an email back to us.
- →Works directly from raw produced-water analyses (TDS, NaCl, Cl-) your operator already files.
- →Multi-well batch mode — compute brine properties for every completion in a package in one upload.
Asset Forecasting & Evaluation Suite
Run the live Formation Water Properties calculator on your data
This calculator is part of Petropt's Asset Forecasting & Evaluation Suite. Request access to run it on your actual temperature, pressure, and salinity inputs and download an engineering-grade workbook.
What the live tool produces
- brine density (g/cc, ppg, lb/ft³)
- viscosity in centipoise, Bw in rb/STB, gas in water in scf/STB
- compressibility (1/psi)
- salinity + temperature corrections (McCain correlations)
- downloadable XLSX workbook
Who uses this
- →RBL bankers sizing semiannual borrowing-base redeterminations on water-cut PDP packages.
- →A&D engineers running 5-day diligence screens where brine handling drives LOE.
- →Reservoir engineers benchmarking aquifer support and produced-water reinjection economics on new field developments.
Pair with
RBL Borrowing Base
Lender-ready collateral math
PDP/PDNP/PUD advance rates + credit memo XLSX/PDF.
Reserve Report Audit
Independent red-flag review
PVT, decline, ARO, NRI checks for credit committees.
NPV & IRR
Economics flagship
PV10, IRR, payout, breakeven on your decline + price deck.
Asset Forecasting
Single-well DCA + portfolio rollup
Arps + Duong + SEPD fit to economic limit.