35 calculators
Reservoir engineering and stimulation
Reserves, inflow, PVT, fracturing, acidizing, waterflooding
For operators
Engineering calculators
Ten areas — from the reservoir and drilling to electrical, environment and payroll. Enter data in metric or field units: everything is converted to the formula's units and the result updates instantly.
Well model
Well production profile
One oil well from start-up to the economic limit: the well type, depletion or pressure support, a liquid plateau and a rising water cut. A monthly chart, a yearly table and CSV.
- Vertical, deviated, horizontal, fractured
- Depletion or pressure support
- Plateau and economic limit
Areas
Calculations across a field's life — from the reservoir and the well to facilities, power, environment and people.
14 calculators
Well test analysis
Build-up and drawdown, skin, productivity, gas wells
22 calculators
Drilling
Pressures and mud, hydraulics, string, cementing, trajectory
14 calculators
Workover and well servicing
Well killing, volumes and circulation, tubing, stuck pipe
20 calculators
Oil and gas production
Productivity, rod pumps and ESPs, metering, chokes, forecast
13 calculators
Field facilities construction
Pipelines, tanks, earthworks, cathodic protection
14 calculators
Mechanical engineering
Pumps, compressors, drives, strength and bolting
11 calculators
Electrical engineering
Power and current, cables, motors, transformers, energy use
10 calculators
Environment
Greenhouse gases, flaring, emission payments, spills, concentrations
9 calculators
HR and payroll
Salary and 2026 payroll taxes, vacation and sick pay, overtime, rotations
141
Calculation No. 141
Beshbarmak for any number of guests. The one calculation that is checked at the table.
Unit converter
Kazakhstan works in metric units, while many formulas and data come in US field units. Enter a value in any unit and all the others update instantly.
Metric
- MPa1
- kPa1,000
- bar10
- atm9.86923
- kgf/cm²10.1972
- mmHg7,500.62
- MPa(g)0.898675
- barg8.98675
US field units
- psi145.038
- psia145.038
- psig130.342
- ksi0.145038
psi and psia are absolute pressure; gauge units (barg, MPa(g), psig) are above atmospheric (101.325 kPa = 14.696 psi). Pressure differences in the formulas do not depend on this.
Oil: tonnes, cubic metres and barrels
Mass and volume are linked by the oil density. A year is 365 days; 1 barrel = 158.987 L.
7.40 barrels per tonne
Amount
- t1,000,000
- kt1,000
- Mt1
- m³1,176,470
- 10³ m³1,176.47
- 10⁶ m³1.17647
- bbl7,399,780
- Mbbl7,399.78
- MMbbl7.39978
Production rate
- t/d2,739.73
- kt/yr1,000
- Mt/yr1
- m³/d3,223.21
- bbl/d20,273.4
- Mbbl/d20.2734
Results are engineering estimates from standard formulas; for design decisions check them against the codes, project documents and specialists' calculations. The formulas carried over from the original set are unchanged, and their errors are described in the notes.