The INTERSECT 2025.2 high-resolution reservoir simulator is the answer to many of your reservoir challenges. By combining physics and performance in a fit-for-purpose reservoir simulator for your reservoir models, the INTERSECT simulator enables modeling at the scale you need with the physics you need—fast. Reservoir engineers are provided with results that can be trusted to provide insight into understanding the progression of hydrocarbon in the reservoir at a resolution that is otherwise too costly to simulate. The outcome is improved accuracy and efficiency in field development planning and reservoir management, even for the most complex fields. From black oil waterflood models, to thermal SAGD injection schemes, to efficient handling of unstructured grids, the INTERSECT simulator delivers a new approach to reservoir simulation for meeting your reservoir management challenges. The INTERSECT simulator reveals new insights through the efficient simulation of high-resolution models while employing robust physics to support better field development decisions. Detailed reservoir characterization, together with well and network coupling, can be honored with only minimal or no upscaling.

What's new in InterSect 2025.2:

Sector modeling workflow

Intersect now supports sector modeling, enabling simulations on smaller sections of a field using boundary conditions derived from a full-field simulation.

During the full-field run, molar or pressure boundaries of the sector model area are recorded in a flux file at specified intervals. This flux file is utilized in sector model simulations, allowing for focused studies on the smaller area to reduce simulation and workflow time. Wells outside the boundaries are tracked and managed to honor the constraints of groups that include wells both inside and outside the sector model.

Sector modeling supports a variety of simulation types and features, including black oil, compositional, thermal, various enhanced oil recovery methods, aquifers, DPDK, and local grid refinements. It accommodates multiple grid types, such as pillar grids and depogrids, and supports restarting from a sector model and time extrapolation for simulations extending beyond the full-field model duration. Parallel, GPU, and multiscale can be used for enhanced performance.

Local grid refinement support for Depogrids

Intersect now supports the use of local grid refinements (LGR) for Depogrid models. This enhancement enables you to achieve higher resolution and accuracy in specific areas of the reservoir model by locally refining the grid within the Depogrid framework. This is particularly beneficial for capturing fine-scale geological features or flow behavior around wells. You can define LGRs in the Petrel environment, and Intersect will consume these definitions during the simulation setup.

Thermal models with a single hydrocarbon component

Prior to this release, Intersect required at least two hydrocarbon components in thermal fluid models with the only exception being a single dead oil component. For geothermal and carbon storage projects involving an aqueous phase, it was required to supply a pseudo component with the necessary information. In this release, this requirement has been removed and the single hydrocarbon component can be present in any phase (oil, gas, and aqueous) based on the provided equilibrium ratios. For legacy workflows, the ThermalDeadOil field is available under the FluidMgr node to model dead components with minimal inputs required.

Viscosity mixing rules for isothermal compositional simulations

The viscosity mixing rule option previously available for thermal simulations has been extended to support isothermal compositional simulations. This option is combined with component viscosity tables defined as a function of pressure.

A new node, ViscosityPressureTable, has been introduced to enable the specification of pressure-dependent viscosity for each pure component in the fluid description. This node is used in conjunction with the ViscosityMixingRule node to model the viscosities of both liquid and vapor phases. The following mixing rules are supported:

• Linear

• Logarithmic

• Power-law

• Phase mole fraction weighting, or Component volume fractions weighting (evaluated at standard condition using the SurfaceMassDensities field)

• Logarithmic function

• Double-logarithmic function

• Component-weighted

These new capabilities significantly enhance the flexibility and accuracy of fluid modeling in Intersect, particularly in complex scenarios where conventional viscosity models might not adequately match laboratory data.

Support for standard gravity drainage model in Multiscale sequential fully implicit

The standard gravity drainage model is now supported in the Multiscale sequential fully implicit (SFI) formulation. You can activate it using the GravityDrainage field under the DualPorosity node. This model accounts for the recovery mechanism in which fluid flow originates from gravity forces caused by height differences in connected fluid volumes, such as a matrix surrounded by fractures.

Output Intersect simulation results for OFM import

The new OutputOFM field has been added to the XYPlotSummaryReport node. When enabled, OFM input files are generated based on the well and completion properties specified in the XYPlotSummaryReport node. The generated files include a definition file (.DEF), a key data file (.XY), and production data files (.PRD) for well and completion production data. You can import these files into SENSIA's OFM Well and Reservoir Analysis Software for further analysis.

Eclipse keyword WECON migrated using templates

The Eclipse keyword WECON is now migrated to Intersect in terms of the EconomicLogicTemplate and ModificationLogicTemplate nodes resulting in a more compact and expressive ixf language.

Maximum/minimum transmissibility controls

The CellActivity node now includes four new fields:

• MinHorizontalTrans

• MaxHorizontalTrans

• MinVerticalTrans

• MaxVerticalTrans

These fields enable you to set upper and lower limits for transmissibility between adjacent cells. You can use this feature in combination with the MinNNCTrans and MaxNNCTrans fields to establish physical limits for transmissibility values across all grid cells.

Adjusting these values helps address issues related to the ill-posedness of the linear system caused by unphysical transmissibility values, thereby improving overall performance.

Support for Red Hat Enterprise Linux 9

Support has been added for the Red Hat Enterprise Linux 9 (RHEL9) distribution. Refer to the Intersect installation and deployment guide for more information.

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