SIMEO™ Stor: Quantitative Well Integrity Assessment and Management Tool
Developed since 2005, SIMEO™ Stor embeds our expertise in well integrity, asset and ageing management and risk management.
The ultimate goal of SIMEO™ Stor is to support decision making with respect to various well operations issues: availability, safety, environment and cost.
The solution SIMEO™ Stor provides a quantitative estimation of the risks at different stages of the well lifecycle to support definition of recommendations and action plans to mitigate critical risks.
Workflow of Oxand’s Well Integrity Risk Management approach
Key benefits for our clients
- Formalize the risk management process for better pro-active well management
- Decrease the subjectivity with structured and robust methodologies and quantitative analysis (when relevant data is available)
- Assess risks associated with status of existing wells and predict evolution of well integrity risks
- Anticipate or analyze well integrity failure scenarios
- Rank well integrity risks in order to define specific prioritized mitigation plans
- Provide objective elements for demonstration to authorities and partners that wells are safe and that a rigorous risk management process is carried out
Key features of SIMEO™ Stor
Key features of SIMEO™ Stor
- All structural well components are modeled: casings, liners, cement annulus, cement plugs (when relevant) from downhole to wellhead
- Near-wellbore geological formations interacting with the well are incorporated in the model: reservoir(s), caprock(s), aquifer(s), etc
- A fluid flow model enables simulating fluid exchanges between geological layers (reservoirs, caprocks, aquifers) and the wellbore through different leakage paths
- Ageing processes due to interactions with fluids are modeled
- Casing string corrosion: uniform corrosion and/or pitting corrosion
- Cement annulus: cement leaching, carbonation in the presence of CO2
- Thermo-mechanical impacts due to well operations and/or geological stresses are modeled: debonding, cement cracking and casing deformation
- Uncertainties can be analyzed by scenarios and probabilistic approaches
- Fluids migration over time is quantified
- A risk model allows estimation of risks according to well integrity modeling results
- Mitigation options can be simulated to support cost/benefits analysis
Modeling of hydrocarbons migration along wellbore over time with SIMEO™ Stor
Fiche SIMEO™ Stor
Download Oxand’s Flyer – Well Integrity Management – Oil Sands
Download Oxand’s Flyer – Well Integrity Management – Offshore
Download Oxand’s Flyer – Well Integrity Management – Sour Gas
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MODELING OF CEMENT ANNULUS BEHAVIOUR USING FE METHODS
In order to better understand cement annulus behavior over the well lifespan, Oxand uses 3D FEM (Finite Element Modeling) methods to simulate the thermo-mechanical behavior of the system.
This modeling approach can be applied to any well type, but is particularly relevant for wells such as HP/HT wells, thermal wells, injection wells, SAGD wells, wells with a complex geometry, wells exposed to geological stresses, wells with regular production or injection stops and wells suffering from annuli pressure.
Key benefits for our clients
- Predict behavior of cement annuli:
- Understand characteristics of failures: location and type of failure (debonding, cracking, deformation)
- Identify parameters leading to well integrity failures (material properties, defects, loads, cycle, operations, etc.) and assess sensitivity of the system
- Analyze well integrity failure and occurrence of annuli pressure
- Better understand phenomenologies involved in annuli behavior
- Decrease the subjectivity with quantitative data rather than qualitative analysis
- Support to modeling of well integrity performance and safety case modeling (gas migration, annuli pressure and surface casing vent flow)
- Support quantitative risk-based well integrity analysis
Key features of thermo-mechanical finite element modeling
- Geology, cement (annuli), and casing are modeled
- External (from geology) and internal (from well operations) thermal and mechanical stresses are applied to well components
- Linear and non-linear laws are used to described material intrinsic properties
- Ageing processes are considered through alteration of material geometry and/or properties
- Predict stress and strain evolution in well components
- Management of uncertainty using scenarios approach and sensitivity analysis