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OLI Studio: ScaleChem

Rigorous upstream production chemistry analysis

OLI Studio: ScaleChem calculation scenarios include mineral scale prediction, fluid mixing, reservoir saturation (with cementing minerals), evaporation during glycol regeneration, and modeling of gathering and disposal facilities.

 

Some key attributes of OLI Studio: ScaleChem:
 

  • Professionally-maintained thermodynamic database and User Interface

  • Process-oriented calculation objects, allowing step-by-step visualization of the case

  • Four phase equilibria and mass balance: vapor, brine, oil and solids

  • Quantitative partitioning of acid gases and volatile fatty acids across brine-oil-gas interface

  • Mix and separate calculations

  • 6000+ species database

  • Seamless link to OLI Studio: Stream Analyzer and Corrosion Analyzer for advanced modeling

 

Standard and expanded oilfield chemistry


OLI Studio: ScaleChem accepts several hundred types of cations and anions.  Therefore virtually any oilfield production scenario can be computed.  For easy user accessibility, the interface contains Standard, Expanded and custom chemistry templates, making workflow easier.

 

Standard chemistry

 

The standard chemistry includes the species and properties found in a typical water analysis:

 

  • Sodium, potassium, magnesium, calcium, strontium, barium and iron cations

  • Chloride, sulfate, bicarbonate and carbonate anions

  • Acetate, CO2, H2S, H3BO3, SiO2, alkalinity, pH, density, conductivity, TDS

 

The standard solid phases are those most commonly reported:

 

  • Calcite (CaCO3), barite (BaSO4), celestite (SrSO4), halite (NaCl),

  • Anhydrite (CaSO4), gypsum (CaSO4·2H2O), and iron sulfide (FeS)

 

Expanded and complete chemistry

 

The expanded chemistry includes the less common species:

 

  • Lithium, cesium, copper, iron (3+), maganese, nickel, lead, zinc and aluminium cations

  • Fluoride, bromide and formate to hexanoate anions

  • Glycol, methanol

 

Which can be expanded to include any species that is in the OLI databanks, such as:
 

  • Elemental sulfur, radium, uranium and chromium cations, EDTA, DTPA, citric acid, oxalic acid, etc.

Brines, gas & oil = whole fluid

 

OLI Studio: ScaleChem creates whole fluid compositions from individual data analyses (brine, gas, and oil). When these analyses are combined at the appropriate flow rates and at a known production location (i.e., reservoir, wellhead, separator), a Whole Fluid is created. This fluid represents the mass balance of fluid exiting the well on a given day. This mass balance approach enables a more accurate fluid properties assessment and a greater variety of production scenarios that can be tested.

 

Specialized calculations

 

 

 

 

Scale Scenarios

Compute the mineral scale saturation ratios and excess solute at a specific set of production locations

Mixing Waters

Test water compatibility at different mixing ratios and conditions

Saturation

Set the analyses (brine, gas, oil) to phase equilibrium at reservoir or other production location. Test the uncertainty in the analyses, and modify the analyses to match field observations

Facilities

Model separation, gathering, filtration through a series of mix / separate operations (no recycle)

Contour Plots

Create a graphic of scale tendency likelihood across a range of T, P that you specify for a given brine or whole fluid

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OLI Studio: ScaleChem is simulation software that calculates scaling problems during oil and gas production.

 

The program computes the four-phase properties of production fluids, providing the user with critical information about their system. 

 

Studio ScaleChem is used throughout the production profile; phase equilibria in the reservoir matrix through surface processing, and to injection and disposal.

 

OLI Studio: ScaleChem accepts brine, gas, and hydrocarbon analyses. It can also accept analyses of treatment fluids, glycol mixtures, and heavy brines.

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