Live Engineering Dashboard

Well Testing Toolbox

Interactive Tools

Engineering calculators and conversion utilities for field work.

Silver Nitrate Used (ml) [A]

Titration for Blank (ml) [B]

AgNO₃ Strength (N) [N]

Sample Volume (ml) [D]

$$mg/L \text{ Cl}^- = \frac{(A-B) \times N \times 35450}{D}$$

ppm Chlorides

$$NaCl = Cl^- \times 1.65$$

mg NaCl / L

$$TDS \approx NaCl \times 1.15$$

mg/L (Estimated)

Measure (A): Titrate your water sample with Silver Nitrate ($AgNO_3$) until the color changes to reddish-brown. Record the ml used.
Blank (B): If using non-distilled water, titrate a blank sample and subtract this value. For distilled water, use 0.
Strength (N): Check the bottle label for normality (usually 0.1 N or 0.0282 N).
Sample (D): Standard field determination typically uses 1 ml of sample.

Note: 35,450 is the milliequivalent weight of Chlorine $\times$ 1,000 to convert to mg/L.

-- Pending Calculation --

Est. Gradient: -- psi/ft

Eq. Mud Weight: -- ppg

Formation Water Type	Salinity Chloride (mg/L)	ppm NaCl	Pressure Gradient (psi/ft)	Eq. Mud Weight (ppg)
Fresh Water	0	0	0.433	8.34
Brackish Water	6,098	10,062	0.435	8.38
Seawater	19,000 - 25,000	41,120	0.444	8.55
Saltwater	37,912	62,555	0.451	8.68
Typical Offshore Gradients
Offshore	108,375	178,819	0.484	9.32
Offshore	155,440	256,476	0.504	9.70
Heavy Saltwater	191,600	316,140	0.519	9.99