NeqSim Field Development Strategy

Executive Summary

This document outlines a comprehensive plan to transform NeqSim into a premier tool for field development screening, production scheduling, tie-back analysis, and new development planning. The strategy builds on existing NeqSim strengths (thermodynamics, process simulation) while adding high-level orchestration capabilities.

Book-Focused Roadmap Update (May 2026)

The TPG4230 field-development book now has direct NeqSim API support for the core examples it discusses: tieback screening, greenfield option comparison, host capacity checks, forecast uncertainty, and concept economics. The first implementation step focused on making existing NeqSim functionality easier to compose instead of adding a parallel study framework.

Implemented Support

Book workflow NeqSim API support Status
Tieback hydraulics and flow assurance TiebackAnalyzer now configures MultiphaseFlowIntegrator and FlowAssuranceScreener, storing arrival pressure, arrival temperature, flow regime, hydrate formation temperature, hydrate margin, and shutdown cooldown risk on TiebackOption. Implemented
Host capacity for brownfield tiebacks HostFacility.assessCapacity(...) returns a HostCapacityReport covering gas, oil, water, liquid spare capacity and optional ProcessSystem bottleneck screening through BottleneckAnalyzer. Implemented
Production forecasts for concept KPIs ConceptEvaluator now derives field life and recovery from ProductionProfileGenerator and ReservoirInput resource/recovery assumptions instead of fixed placeholders. Implemented
Sensitivity and Monte Carlo economics CashFlowEngine.copy() preserves production profiles, CAPEX timing, tariffs, prices, OPEX, and tax configuration; SensitivityAnalyzer uses that copy for tornado, scenario, and Monte Carlo cases. Implemented
Greenfield and tieback templates GreenfieldConceptFactory creates comparable DevelopmentCaseTemplate objects for subsea tieback, standalone FPSO, fixed platform, subsea-to-shore, onshore terminal, and phased brownfield expansion. Implemented
Book-ready examples docs/fielddevelopment/README.md uses current APIs and includes a template comparison example verified by DocExamplesCompilationTest. Implemented
Multi-segment route networks TiebackRouteNetwork represents flowlines, branches, risers, shared corridors, and host hubs. TiebackAnalyzer accepts route networks and stores installed length, shared corridor length, branch/riser counts, and route summaries on TiebackOption. Implemented
Probabilistic template assumptions DevelopmentCaseTemplate now carries DevelopmentCaseUncertainty with P10/P50/P90 resource, CAPEX, schedule, price, and production-factor ranges. ReservoirInput supports resource uncertainty directly. Implemented
Lifecycle emissions EmissionsTracker.estimateLifecycle(...) generates year-by-year emissions tied to production decline, compression load, power source, flaring, fugitives, and vented CO2; templates carry a LifecycleEmissionsProfile. Implemented
Reservoir/profile coupling ProductionProfileGenerator now creates resource-capped profiles from ReservoirInput and SimpleReservoir, fits exponential decline from production history, and exports VFP-ready annual rate tables. Implemented
Book/report tables FieldDevelopmentReportExporter generates standard markdown comparison tables and figure-ready NPV data from tieback reports, templates, tornado results, and concept KPIs. Implemented

Teaching Workflow Status

The TPG4230 book improvement has packaged NeqSim as three executable teaching workflows:

Workflow What the notebook should demonstrate Primary APIs
Tieback Screening Notebook Define a satellite discovery, candidate hosts, route length/depth, representative fluid, hydraulics, flow assurance, host capacity, NPV, and feasibility ranking. TiebackAnalyzer, TiebackReport, HostFacility, MultiphaseFlowIntegrator, FlowAssuranceScreener
Tieback vs Standalone Notebook Compare host tieback, standalone FPSO, and fixed-platform alternatives using one production profile, CAPEX class, power/emissions basis, and tax model. GreenfieldConceptFactory, DevelopmentCaseTemplate, EconomicsEstimator, EmissionsTracker, CashFlowEngine
Probabilistic Concept Selection Notebook Run P10/P50/P90 NPV, tornado sensitivity, breakeven price, and a compact risk register for selected alternatives. SensitivityAnalyzer, ProductionProfileGenerator, CashFlowEngine, ConceptEvaluator

These notebooks should live in the TPG4230 book Chapter 24 notebook folder and feed results back into Chapters 11, 13, 17, 18, and 28. Each notebook should have a plan.json, results.json, and claims_manifest.json entry so the PaperLab replication gate can rebuild the calculations from a clean checkout.

The next book-facing work is to use the decision-engine objects in Chapter 24 and the related field-development chapters: replace notebook-local tables with FieldDevelopmentReportExporter, add one route-network example with shared corridor economics, and include lifecycle-emissions plots beside the existing NPV and sensitivity figures.

Current State Analysis

Existing Building Blocks ✅

NeqSim already has substantial infrastructure for field development:

Package Class Purpose Maturity
process.equipment.reservoir SimpleReservoir Tank-type material balance model ✅ Stable
process.equipment.reservoir WellFlow IPR (inflow performance) modeling ✅ Stable
process.equipment.reservoir WellSystem Combined IPR + VLP (tubing) model ✅ Stable
process.equipment.reservoir TubingPerformance Vertical lift performance ✅ Stable
process.fielddevelopment.concept FieldConcept High-level concept definition ✅ New
process.fielddevelopment.concept ReservoirInput Reservoir characterization ✅ New
process.fielddevelopment.concept WellsInput Well configuration ✅ New
process.fielddevelopment.concept InfrastructureInput Infrastructure definition ✅ New
process.fielddevelopment.screening FlowAssuranceScreener Hydrate/wax/corrosion screening ✅ New
process.fielddevelopment.screening EconomicsEstimator CAPEX/OPEX estimation ✅ New
process.fielddevelopment.screening SafetyScreener Safety screening ✅ New
process.fielddevelopment.screening EmissionsTracker CO2 emissions estimation ✅ New
process.fielddevelopment.evaluation ConceptEvaluator Concept orchestration ✅ New
process.fielddevelopment.evaluation BatchConceptRunner Multi-concept comparison ✅ New
process.fielddevelopment.facility FacilityBuilder Modular facility configuration ✅ New
process.util.fielddevelopment ProductionProfile Decline curve modeling ✅ Stable
process.util.fielddevelopment WellScheduler Well intervention scheduling ✅ Stable
process.util.fielddevelopment FacilityCapacity Bottleneck analysis ✅ Stable
process.util.fielddevelopment SensitivityAnalysis Monte Carlo analysis ✅ Stable
process.util.fielddevelopment FieldProductionScheduler Production scheduling 🔄 New (basic)
process.util.optimization ProductionOptimizer Production optimization ✅ Stable

Gap Closure Status

The original gap list has now moved from architecture planning into implemented API coverage:

Original gap Current NeqSim support Verification
Tie-back analysis engine TiebackAnalyzer, TiebackOption, TiebackReport, HostFacility, and TiebackRouteNetwork screen hosts, route networks, hydraulics, flow assurance, capacity, CAPEX, and NPV. TiebackTest
Multi-field portfolio PortfolioOptimizer ranks field, tieback, IOR, exploration, and infrastructure projects under total and annual capital constraints. PortfolioOptimizerTest
Norwegian petroleum economics NorwegianTaxModel, TaxModelRegistry, FiscalParameters, and CashFlowEngine cover the 22% corporate plus 56% petroleum-tax model and generic fiscal alternatives. EconomicsTest, TaxModelTest, FieldDevelopmentNPVTest
Facilities integration ConceptToProcessLinker generates screening-to-concept process systems from FieldConcept definitions and exposes utility summaries from the generated ProcessSystem. FieldDevelopmentIntegrationUtilitiesTest
Time-series export ReservoirCouplingExporter generates VFP production/injection tables, schedule keywords, group/well controls, separator efficiency tables, and CSV production forecasts for reservoir coupling. FieldDevelopmentIntegrationUtilitiesTest
Decision support DevelopmentOptionRanker, ConceptEvaluator, and BatchConceptRunner provide multi-criteria ranking, concept KPI scoring, and batch comparison. DevelopmentOptionRankerTest, FieldDevelopmentEngineTest
Pipeline hydraulics integration MultiphaseFlowIntegrator, TiebackRouteNetwork, NetworkSolver, and NetworkResult connect tieback screening to multiphase pipeline and gathering-network calculations. TiebackTest, FieldDevelopmentIntegrationUtilitiesTest

Strategic Architecture

Implemented Module Structure

The field-development engine now uses an implemented package layout rather than a proposed one:

Package Implemented role
concept/ Field concepts, reservoir/well/infrastructure inputs, standardized templates, and P10/P50/P90 uncertainty bundles.
evaluation/ Concept KPI evaluation, batch comparisons, Monte Carlo support, and multi-criteria option ranking.
screening/ Flow assurance, safety, emissions, lifecycle emissions, artificial lift, and cost screening.
facility/ Facility block configuration and ConceptToProcessLinker for generating ProcessSystem models from concepts.
tieback/ Host-facility modelling, tieback option analysis, feasibility reports, and route-aware ranking.
network/ Route-network metadata, multiphase pipeline screening, gathering-network solving, and network result reporting.
economics/ Cash-flow engine, Norwegian and generic fiscal models, sensitivity/Monte Carlo economics, production profiles, and portfolio optimization.
reservoir/ Transient well models, injection strategy support, and ECLIPSE/E300 coupling exports.
reporting/ Book/report-ready markdown tables and figure data for comparisons, KPIs, sensitivities, and tieback cases.
workflow/ Unified workflow orchestration across screening, conceptual, and detailed study phases.

Integration Shape

The decision engine is intentionally layered:

  1. FieldConcept captures the field-development assumptions.
  2. Screening classes calculate flow-assurance, emissions, safety, and economic indicators.
  3. TiebackAnalyzer, GreenfieldConceptFactory, PortfolioOptimizer, and DevelopmentOptionRanker compare alternatives.
  4. ConceptToProcessLinker, NetworkSolver, and ReservoirCouplingExporter bridge the screening models to detailed process, network, and reservoir workflows.
  5. FieldDevelopmentReportExporter packages outputs for notebooks, reports, and the TPG4230 book.

Implementation Status and Remaining Maturation

Capability Status Next maturation step
Core economics and Norwegian tax Implemented in CashFlowEngine, NorwegianTaxModel, and TaxModelRegistry. Calibrate fiscal examples against public NCS case studies and add a concise tutorial.
Tieback screening Implemented in TiebackAnalyzer with host capacity, hydraulics, flow assurance, economics, and route-network metadata. Add more public benchmark cases for long, cold, and shared-corridor tiebacks.
Production forecasting Implemented through ProductionProfileGenerator and ReservoirInput resource/recovery assumptions. Connect additional history-matching examples to public production data.
Portfolio optimization Implemented in PortfolioOptimizer. Add efficient-frontier plotting helpers and infrastructure-synergy examples.
Pipeline and gathering networks Implemented in TiebackRouteNetwork, MultiphaseFlowIntegrator, NetworkSolver, and NetworkResult. Replace selected screening correlations with higher-fidelity PipeBeggsAndBrills cases where runtime allows.
Reservoir coupling export Implemented in ReservoirCouplingExporter and VFP-ready profile export helpers. Add round-trip examples that feed generated schedule/VFP snippets into reservoir-simulator workflows.
Decision support and reporting Implemented in DevelopmentOptionRanker, BatchConceptRunner, ConceptEvaluator, and FieldDevelopmentReportExporter. Use the exporter consistently in Chapter 24 notebooks and field-development documentation.

Use Case Workflows

The implemented APIs now support three reusable workflow families for teaching, screening, and early concept selection.

Use case Workflow Primary outputs
Gas tieback screening Define a discovery, candidate hosts, optional route networks, representative fluid, and host constraints; run TiebackAnalyzer. Feasible hosts, hydraulic margins, flow-assurance risks, host-capacity bottlenecks, CAPEX, NPV, and route summaries.
Field development with NPV Build DevelopmentCaseTemplate objects or FieldConcept inputs; evaluate production, emissions, and fiscal economics using GreenfieldConceptFactory, ConceptEvaluator, and CashFlowEngine. Production profile, lifecycle emissions, after-tax cash flow, NPV, breakeven price, and uncertainty ranges.
Portfolio investment planning Add candidate projects to PortfolioOptimizer, set total or annual budget constraints, then compare optimization strategies. Selected/deferred projects, budget use by year, portfolio NPV, EMV, and capital efficiency.
Reservoir/process coupling Generate process systems with ConceptToProcessLinker and export VFP/schedule data with ReservoirCouplingExporter. Process utility summaries, VFPPROD/VFPINJ tables, group/well controls, and production-forecast CSV data.
Decision support Score alternatives with DevelopmentOptionRanker and publish tables with FieldDevelopmentReportExporter. Ranked concept list, weighted MCDA scores, tornado tables, KPI comparison tables, and figure-ready data.

Integration Points

With Existing NeqSim

Component Integration
SystemInterface Fluid PVT for reservoir, process, and flow-assurance calculations.
SimpleReservoir Material-balance depletion and resource-capped production profiles.
WellFlow / WellSystem IPR/VLP well models feeding network and reservoir-coupling workflows.
ProcessSystem Generated facility models and optional host-facility bottleneck screening.
PipeBeggsAndBrills and pipeline equipment Higher-fidelity hydraulic checks behind screening-level route and network abstractions.
CashFlowEngine and tax models Country-specific after-tax economics and copy-safe scenario/sensitivity analysis.

With External Tools

Tool Integration Method
ECLIPSE/E300 VFP tables and SCHEDULE keyword snippets from ReservoirCouplingExporter.
Excel / CSV tools Production forecast, portfolio, and comparison table exports.
Python/Jupyter neqsim-python bindings plus book notebooks using the workspace Java classes.
Power BI / Spotfire CSV/JSON-ready outputs from report and export helpers.

Testing Strategy

Implemented coverage now includes:

Test area Current tests
Tieback, host capacity, hydraulics, route networks TiebackTest
Field concepts, templates, lifecycle emissions, report exporter FieldDevelopmentEngineTest
Norwegian tax, cash flow, sensitivity, production profiles EconomicsTest, TaxModelTest, FieldDevelopmentNPVTest
Portfolio optimization PortfolioOptimizerTest
Decision ranking DevelopmentOptionRankerTest
Process linking, reservoir export, network solver FieldDevelopmentIntegrationUtilitiesTest

Remaining test growth should focus on public benchmark studies, round-trip reservoir coupling, and higher-fidelity multiphase hydraulics comparisons.

Success Metrics

  1. Screening speed: Evaluate a tieback option in less than 5 seconds for teaching-scale cases.
  2. Accuracy: Keep screening NPV within about 20% of detailed engineering once public calibration cases are available.
  3. Usability: Maintain simple APIs for common workflows while preserving detailed NeqSim escape hatches.
  4. Integration: Keep direct paths from concept screening to process, network, reservoir, economics, and reporting tools.
  5. Documentation: Keep the strategy, README examples, tests, and TPG4230 notebooks synchronized with current APIs.

Next Steps

  1. Move Chapter 24 notebooks fully onto FieldDevelopmentReportExporter outputs.
  2. Add one route-network teaching example with branches, a riser, and shared-corridor economics.
  3. Add lifecycle-emissions plots next to existing NPV and sensitivity figures.
  4. Add public benchmark/calibration cases for Norwegian fiscal economics, tieback hydraulics, and reservoir coupling exports.
  5. Mature portfolio optimization with infrastructure synergy and efficient-frontier visualizations.

Appendix: Norwegian Petroleum Economics Reference

Tax Rates (2024)

Deductions

Tariffs (Typical)

Price Assumptions (Planning)