Live Engineering Dashboard

Well Testing Toolbox

Interactive Tools

Engineering calculators and conversion utilities for field work.

Depth (ft)

Gas Deviation Factor (Zavg)

Wellhead Pressure (psia)

Gas S.G (0.7 default)

Avg Temperature (Rankine: °F + 460)

Calculated BHP (psia):

3660.25

Mud Weight (lbs/gal)

Depth (ft)

Calculated BHP (psia):

1820.00

Mud Weight (in pcf)

Depth (ft)

Division Factor (fixed)

Calculated BHP (psia):

5177.08

Convert between standard oilfield density units.

Pounds per Gallon (ppg)

Pounds per Cubic Foot (pcf)

Pressure Gradient (psi/ft)

*Note: Based on freshwater density of 8.33 ppg / 62.4 pcf.

The calculators in this dashboard are powered by the following industry-standard correlations:

Gas Rate (Choke):

$$q_g = \frac{C \cdot A \cdot P_1 \cdot C_d}{\sqrt{T \cdot \gamma_g \cdot Z}}$$

Calculates flow through a restriction under critical (sonic) conditions.

Gas BHP (Static):

$$P_{ws} = P_{wh} \cdot e^{\left( \frac{0.01875 \cdot \gamma_g \cdot H}{Z \cdot T} \right)}$$

The Cullender and Smith simplified approach for static gas columns.

Step 1: Input Field Data. Enter your gauge readings ($psig$ or $psia$), temperatures ($^\circ F$), and fluid properties ($ppg$ or $pcf$).
Step 2: Check Units. Use the Fluid Density Converter if your mud weight is in a different format than the calculator requires.
Step 3: Calculate & Verify. Click the primary action button. If calculating Choke Rates, compare the "Effective Choke" to your "Nominal Choke" to check for bean erosion.
Step 4: Report. All results are provided in standard oilfield units ($mscf/d$, $psia$, $cp$) for direct entry into your Daily Operations Report.