UPSTREAM Modeling

RN-SIMTEP is a software package for modeling technological processes in transportation, treatment and primary processing of well products. It is designed to solve problems at the stage of oil fields design and operation.

RN-SIMTEP -

What's new

New versions of RN-SIMTEP are released monthly.

08.31.21 Version

08.31.21 Version

New improvements:

  • the adaptation module is enhanced: now it is possible to select variable and target parameters of process layouts located on different Systems (Gathering/Processing/RPM Systems);
  • search for components is added when creating a set of fluid components;
  • the required property search is added into the Properties Table displayed on the layout for the selected object;
  • percent UOMs are updated for water cut and separator carryover;
  • the process layout calculation is fixed in case of excess pressure setting.
07.30.21 Version

07.30.21 Version

New improvements:

  • calculating length and frequency of gas-liquid slugs is implemented;
  • now it is possible to vary the fluid model parameters during adaptation;
  • the adaptation module based on user feedback is improved (setting the change step for each variable parameter; quick inclusion/exclusion of variable parameters during adaptation);
  • calculation of gas temperature at the three-phase separator outlet is fixed when setting carryover values.
06.30.21 Version

06.30.21 Version

New improvements:

  • a module for adapting the parameters of process layout objects to target values is implemented;
  • the process of opening saved projects is optimized;
  • displaying calculation results at the end of layouts calculation is optimized;
  • heat transfer calculation is corrected when ground temperature changes;
  • the rules for connecting objects when creating layouts are corrected.
05.31.21 Version

05.31.21 Version

New improvements:

  • calculation of organochlorine compounds in oil was implemented in technological modeling;
  • the interface for specifying the compositional fluid model is modified;
  • scaling of graphs along the Y axis is adjusted;
  • in the object browser (wells and sources) it is now possible to set fluid models.
04.30.21 Version

04.30.21 Version

New improvements:

  • simulation of oil treatment facilities using black oil model is implemented;
  • import of models from RN-KIN is adjusted (connection of gathering and RPM systems diagrams, methods for calculating emulsion viscosity, parameters of RPM system objects);
  • the component database is updated with the data from commercial software.
03.31.21 Version

03.31.21 Version

New improvements:

  • models of oil gathering and RPM pipeline networks can now be imported from RN-KIN;
  • database of components is extended for creating compositional fluid models;
  • the method for calculating multiphase flow can be adjusted depending on the pipe inclination angle;
  • enthalpy calculation correlations are added into creating Black Oil models;
  • the list of parameter restrictions is extended in project settings.
26.02.21 Version

26.02.21 Version

New improvements:

  • date/time dependent layout calculation is implemented (as a sequence of steady states);
  • now it is possible to set the flow type in equilibrium calculation of the pipeline network in black oil mode;
  • setting the way of displaying the objects connecting on the process layout is added;
  • import of models from commercial software is implemented.
01.29.21 Version

01.29.21 Version

New improvements:

  • water is added into the database of components;
  • the calculation of three-phase "oil-gas-water" equilibrium is implemented;
  • flow summarizing valve simulation is adjusted in black oil mode;
  • wells are added into the equipment library during oil treatment facility simulation;
  • project reporting is fixed.

Physical and Mathematical Model

Phase equilibrium models

Phase equilibrium models

  • Compositional model of three-phase equilibrium "vapor-liquid-liquid" uses cubic equations of state and Huron-Vidal mixing rules. It takes into account the liquid non-hydrocarbon phase and allows calculating phase equilibrium in the presence of polar components such as water, methanol, glycols etc.
  • Compositional model of equilibrium "vapor-liquid" uses cubic equations of state and classical mixing rules. It has an expanded library of components and allows calculating phase equilibrium in a wide range of temperature and pressure conditions.
  • Three-component Black Oil model, which allows calculating the PVT properties of oil, gas and water according to the selected correlations with minimal laboratory fluid information.
Pipeline network modeling

Pipeline network modeling

  • empirical and mechanistic models for determining the pressure gradient in vertical, horizontal and inclined pipes during the movement of multiphase flows, taking into account the route profile: Beggs-Brill, Ansari, Azis, Xiao
  • analytical and numerical models for determining heat loss taking into account changes in the flow phase state and heat transfer in buried and partially buried pipes
  • determination of PVT parameters at each pipeline section depending on changes in temperature and pressure conditions and phase state
  • modeling of branched pipelines, taking into account crossflows, loopings and loop sections
  • predicting the risks of complications (high viscosity emulsions, corrosion, ARPD, hydrating, scale, organochlorine compounds)
Modeling of oil treatment facilities

Modeling of oil treatment facilities

  • modeling of separation/heat transfer/transport equipment
  • using the laws of mass and heat balance at each facility, taking into account phase flow state changing
  • simulation of process equipment using compositional and Black Oil fluid models
  • simulating various processes of: flash and stage separation, compression, condensation, throttling, flow heat exchange, flow heating/cooling, flow mixing, taking into account phase carryover during separation, equipment power consumption, complications at surface facilities
  • predicting the risks of complications (high viscosity emulsions, corrosion, ARPD, hydrating, scale, organochlorine compounds)

Benefits

Multifunctional PVT-module

RN-SIMTEP contains an extended database of components, including reference data and parameters from the commercial software.

PVT-module allows:

  • calculating flow PVT properties based on the compositional and Black Oil models in a wide range of temperature and pressure conditions
  • adjusting fluid models according to laboratory data
  • taking into account the solubility of hydrocarbon components in water
  • calculating the content of water vapor and dropping water in the gas phase, taking into account changes in temperature and pressure conditions
Equipment modeling taking into account physical processes

Calculation of process layouts in RN-SIMTEP takes into accont the following effects:

  • vaporization and condensation in changing temperature and pressure conditions
  • separation accounting for phase carryover
  • compression
  • throttling
  • different types of heat exchange
  • recalculation of the phase state with mixing flows
  • equipment power consumption
  • complications at surface facilities
Joint simulation of gathering, processing and RPM systems

RN-SIMTEP makes it possible to simulate gathering, processing and RPM systems in a single project. This allows implementing an integrated approach to modeling of surface facilities. Joint simulation provides an optimal operating mode and management selection for the whole Gathering/Processing/RPM process chain.

Cost-benefit analysis

RN-SIMTEP makes it possible to conduct an economic evaluation of the field development project. The module for calculating economic indicators is aimed at assessing the cost of development and construction and determining investment efficiency. It is possible to quickly solve the tasks of a pre-design feasibility study based on the surface facilities already modeled in RN-SIMTEP, compare them, and analyze the sensitivity of investment projects.

Analysis of complication risks

It is possible to predict complications (corrosion, ARPD, hydrating, scale) for any surface facility. Based on modeling under various conditions, the optimal management solution is selected to minimize the risks of complications.

Intuitive interface and multiple functionalities

RN-SIMTEP has an intuitive and easily customizable interface, it was developed taking into account the requests of specialists involved in modeling technological processes. Models from commercial software can be imported. New functionality monthly.

RN-SIMTEP Main Modules

PVT Module

PVT Module

Pipeline Network Simulation Module

Pipeline Network Simulation Module

Surface Facilities Simulation Module

Surface Facilities Simulation Module

Complications Simulation Module

Complications Simulation Module

Standard creating and analyzing process models at surface facilities

Prepairing PVT-models

Prepairing PVT-models

RN-SIMTEP makes it possible to work with compositional and Black Oil fluid models.

Black Oil model creating includes the following operations:

  • input of parameters for fluid characterization
  • selection and adjustment of correlations for calculating phase PVT-properties

Compositional model creating includes the following operations:

  • forming a set of components
  • setting compositional model parameters
Creating process layout

Creating process layout

RN-SIMTEP contains three sections for modeling gathering, processing and RPM systems. Gathering and RPM systems include the subsystems for direct (sequential) calculation and equilibrium calculation (with equilibrium determination at the nodes by the method of contour flow rates). The treatment system section includes various facilities for the treatment of oil, water and gas. Process layout creating is the same for all subsystems and includes the following operations:

  • to add Sources, Gutters and other layout objects
  • to connect the objects
  • to set pressure and temperature conditions and flow rates at Sources
  • to set parameters of objects
  • to start simulation
Analysis of results

Analysis of results

RN-SIMTEP contains a number of tools for analyzing simulation results:

  • property editor, which displays the values of PVT-properties, flow rates and phase compositions, parameters for complication risks
  • graphs for viewing pressure and temperature profiles, PVT-properties and individual phases along the pipeline section
  • object explorer to quickly adjust the input data for groups of objects
  • all types of reports

2021-2022 Plans

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  • Parametric calculations and optimization of equipment operating modes

  • Using ML and AI, for the process managing as well

  • Developing pipeline network functionality to simulate slugs and multiphase flows taking into account complications

  • Functionality enhancement to solve the following tasks: simulating flare systems, amine treatment of gas, absorption/adsorption gas dehydration, water treatment, inhibiting complications