Material Balance Oil Initially In Place Calculator
Estimate the volumetric oil initially in place from drainage area, net thickness, porosity, water saturation and oil formation volume factor.
Description
Estimate the volumetric oil initially in place from drainage area, net thickness, porosity, water saturation and oil formation volume factor.
Material Balance Oil Initially In Place Calculator: Estimate the volumetric oil initially in place from drainage area, net thickness, porosity, water saturation and oil formation volume factor.
When to use Material Balance Oil Initially In Place
Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.
- Area
- Drainage area in square kilometres.
- Net thickness
- Net pay thickness in metres.
- Porosity
- Porosity as a volume fraction.
- Sw
- Initial water saturation as a fraction.
- Bo
- Oil formation volume factor Bo in reservoir cubic metres per stock-tank cubic metre.
How Material Balance Oil Initially In Place works
Estimate the volumetric oil initially in place from drainage area, net thickness, porosity, water saturation and oil formation volume factor. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- Reservoir oil volume
- Oil volume at reservoir conditions in cubic metres.
- OOIP
- Oil initially in place at stock-tank conditions in cubic metres.
Limitations and assumptions
- Petroleum correlations are fluid-, pressure-, temperature-, and region-dependent. PVT sampling, phase behavior, relative permeability, capillary pressure, heterogeneity, aquifer support, well constraints, history match, and units affect forecasts and reserves.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.
References
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Reservoir engineering — Wikipedia contributors
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- Recovery Factor Calculator
Compute the recovery factor as cumulative produced volume divided by original oil in place.