Flash Geomodelling
A Base Case static model + a Full Volumetrics Uncertainty analysis can be performed in 14 days.
Enable sound decision making and avoid:
- Taking decisions too quickly with too little information at hand and higher chance of overlooking critical aspects of your reservoir, ultimately eroding the success factor of the project.
- Diving too deep into details too early to discover after several months of resource mobilization the challenge has not, and will not be addressed this way.
Our workflow is:
Based on years of practice
The Flash Geomodelling service is a well oiled workflow, born after years and years of practice. It is based on the Right Modelling concept (Lazar, R., 2016) which consists in inputting the right level of complexity in the model to propose a balanced technical solution to ultimately address the business decision.
Used successfully on several reservoirs
The Flash Geomodelling workflow has been successfully performed on several reservoirs from carbonates to clastics , from new discovery to ultra mature field.
Used on most common Gemodelling platforms
The Flash Geomodelling workflow can be run on the most common Geomodelling platforms (Petrel, JewelSuite/PetroSigns, Decision Space Geomodelling).
Geomodelling Services
The concept of “right modelling” consists in building the reservoir model with the adequate level of complexity (Lazar, R., 2016) in order to provide a technical solution for supporting a business decision (the purpose of the model).
The concept of right modelling is based on the Accuracy versus Precision paradigm applied to the subsurface: A reservoir model will always be a simplification “more or less” complex of the actual subsurface.
The right modelling methodology lies on keeping the reservoir model as simple as possible while addressing the key technical aspects: Complexities are introduced when required and well understood.
By referring to the right modelling staircase, the geomodeller can tailor the modelling effort depending on the amount of data, the level of understanding and the purpose of the model to achieve higher efficiency.
Carbonate reservoirs contain over 60% of the world’s remaining conventional oil reserves and account for over 30% of the world’s daily oil production.
Building accurate and predictive reservoirs models for carbonates reservoir is a well acknowledged challenge to our industry.
The actual reservoir properties are the result of complex interplays between primary depositional settings and secondary processes altering the initial reservoir properties inherited at deposition.
GeomodL best practice for carbonates modelling is to integrate “all data available” from the micro to the macro scale. Lateral reservoir property variations are captured from direct observations (seismic) and calibrated by a priori knowledge (recent / ancient analogues).
Because of the nature of the subsurface and the scarcity of available data, uncertainties are inherent in reservoir modelling.
As comprehensive and robust a geomodel could be, it is always one single realization among a range of probable realizations.
Understanding, framing and capturing subsurface uncertainties is of paramount importance for successful development of hydrocarbons.
GeomodL unique uncertainty analysis workflow enables the generation of comprehensive and meaningful range of static realizations based on the principal static reservoir uncertainty parameters.
Reservoir Model Audit – Geom-audit
The Challenge
You are starting a geomodelling project. There is a legacy static model built by the previous Geomodeller, what do you do?
- Build up from the existing static model, or
- Scrap off and start it all over again
Build up from existing static model may save time while starting all over again may be more beneficial if the previous model concepts are not outdated and follows best practices
The answer comes for an assessment of the existing static model:
- Do we have new data that can easily be “plugged” into the existing static model
- Are the geological concepts still valid and not outdated?
- Is the static model still accessible?
- Does the existing static model ADDRESS the reservoir modelling objectives?
- Can I base the business decisions on the existing static model
Solution
A Geom-audit is a systematic, structured and independent examination of a geomodel. The principal control points are:
- Verification of geological concepts underlying the architecture of the reservoir (how the model should look like)
- Assessment of the methodology chosen to translate the geological concepts into the geomodel (how the model actually looks like)
- Check if all the steps taken to build the geomodel are following common best practices and avoid known pitfalls
GeomodL can perform Geom-audits on the geomodels for your operated assets (internal) or non-operated settings (external review) as a starting point before potential remediation
The Geom-audit report, in an Excel and / or readable format, is easy to go through, serves as an audit trail for future reference but most importantly, is the starting point for planning additional work.
Geom-audit architecture
1) Static Model integrity test
a) Check the Petrel file(s)
b) Check the various objects in the Petrel project (seismic objects, well data, input surface, well logs, etc…)
2) Data extraction
a) Input wells + well tops + well logs
b) Velocity model (if any)
c) Horizon / Surface inputs
d) Seismic data
e) Model construction history
f) Automated workflow (if any)
g) 3D grid(s)
3) Static model assessment
a) Structural modelling overview
b) Property modelling inventory
c) Property modelling assessment
d) Volumetrics assessment
e) Uncertainty analysis review
4) Recommendation
a) Summary report addressing the strengths and weaknesses of the static model
b) Recommendation for further work to upgrade the static model and address the reservoir model objective(s)
The Geom-audit can be performed on static model build in Petrel, JewelSuite and DecisionSpace Geosciences.
The Geom-audit is scalable:
- 3 days work for fast and first pass assessment
- Longer times for in depth assessment
Reservoir Model Audit – Dyna-audit
A Dyna-audit is a systematic and independent examination of a Dynamic model. The principal control points are:
- Verification of transfer of reservoir concepts between the geological model and the dynamic model
- Evaluation of the history match and assessment of the observables
- Check if all the steps taken to build the Dynamic model are following common best practices and avoid known pitfalls
- QC of production forecasts assumptions and results
GeomodL can perform Dyna-audit on the dynamic models for your operated assets (internal) or non-operated settings (external review) as a starting point before potential remediation
The Dyna-audit report, in Excel format, is easy to go through and serves as an audit trail for future reference
Integrated Well Delivery
GeomodL International can:
- Oversee, assess and provide the required expertise in drilling and well engineering;
- Undertake detailed analysis and application of critical well engineering design, planning and operational needs to ensure projects have fully considered all offset well engineering knowledge / learnings and are safe, cost-effective and achievable
GeomodL can design your well / drilling campaign to meet the objectives in a safe and budget controlled fashion.
Today, well planning, design and delivery require a higher degree of integration between the engineering team designing the well and the subsurface team counting on the well to deliver the required hydrocarbon rate to the surface. To be on the winning side, the planned well(s) must be set against the subsurface uncertainty envelope around the reservoir to ensure that under-delivery risk is well framed, communicated to the management and the best concept is further matured.
GeomodL can design your well / drilling campaign to meet the objectives in a safe and budget controlled fashion.