Geology for energy resources
Study-unit Code
In all curricula
Cristiano Tarchiani
  • Cristiano Tarchiani
  • 42 ore - Cristiano Tarchiani
Course Regulation
Coorte 2023
Learning activities
Attività formative affini o integrative
Academic discipline
Type of study-unit
Opzionale (Optional)
Type of learning activities
Attività formativa monodisciplinare
Language of instruction
The course target is to provide participants with a basic understanding of the nature and main characteristics of a hydrocarbon reservoir and its related study and development techniques.
Reference texts
Advances in Reservoir Geology : Author: Ashton, (Geological Society Special Publication, 69)
Petroleum Geoscience: Authors: Gluyas J. & Swarbrick R. (2004)
Publisher: Blackwell Publishing, 359 p.
Educational objectives
This course aims to develop a fundamental knowledge of the main concepts of reservoir geology, reservoir characterization, and reservoir modelling, and to apply this knowledge to the understanding of 3D representations of subsurface and to reservoir studies.
To understand and know how to apply the techniques described while teaching, it is very important for the student to know the basic concepts of sedimentology, structural geology, and geophysics (specifically, logs evaluation and seismic interpretation).
Teaching methods
The course is organized in frontal lessons and in practical lessons on Petrel software
The course is organized in two sessions, one theoretical and the second practical. First section can be subdivided into four modules.
Module 1: Introduction to reservoir and field development
Module 2: Data and their integration
Module 3: Modelling, objectives, and workflow
Module 4: calculation of volumes of hydrocarbons in place, fractured reservoir, and transfer of the model to the flow simulator
Second section students attend consists of a practical modelling exercise on a synthetic dataset using Petrel suite, with the support of colleagues who are experts in modelling.
Other information
For meeting and request use the following email
Learning verification modality
End-of-course exams are written and are organized as a test schedule. The test lasts no longer than 120 minutes and is intended to verify the ability to correctly apply the theoretical knowledge and the ability to understand the proposed problems.
Extended program
Theoretical section

Module 1: Introduction to reservoir and field development
• Introduction to reservoir geology: reservoir definitions, traps, geomodelling workflows, types, fluids, depletion mechanism,
• The phases of life of a field: activity, duration, economic impact
• The development of a reservoir
• Managing field production
• Field studies at different stages of an asset life
Module 2: Data and their integration
• Different source of data (static and dynamic), characteristics, advantages, and limitations of data integration when from different sources, scale, and domains
• pills of seismic interpretation: seismic data (faults, horizons, picking, well to seismic tie), surface calibration, correspondence of seismic and geological structures)
• logs, logs interpretation, core, and analysis
• production test
• other types of data
Module 3: Modelling, objectives, and workflow
· Construction of the 3D reservoir geometric model: Type of grids/ approaches, depo-space, pillar, grid-less. Fault modelling, pillar gridding. Surface modelling in a stratigraphic framework. Zone modelling with isochore, fine layering.
· Distribution in the 3D model of facies and petrophysical parameters: hierarchical modelling approach with facies and property by facies. Facies by cut off, by clustering of logs and of petro-elastic curves. Rock types and facies. Petro-elastic facies and seismic characterization. Recap of continuous properties: porosity, permeability, saturation(s), capillary pressure and saturation height modelling. Scale up of logs/curves. Geostatistical techniques for continuous (phie, net to gross, phie net, permeability, saturation (seq. gauss. simulation) and discrete properties -facies- (sequential indicator, TGS, PGS, MPS, with seismic conditioning). Scenario, realizations, pill of uncertainty. Case history: integration of seismic with training image for MPS reservoir modelling, using scenario for risk analysis.
Module 4: calculation of volumes of hydrocarbons in place, fractured reservoir, and transfer of the model to the flow simulator
· Basic concepts of "fractured reservoir (joint, fault, ..., stress fields, .. ), fracture detection on core, logs, seismic. Fractured field modelling, effective medium, DFN.
· Pills of reservoir engineering (Dynamic model and production history match).

Practical section
• Introduction to the Case Study.
• Analysis of available data.
• Correlation between wells and definition of geological layering and fluid contacts (make horizon & zones. Fine layering).
• Modelling the structure and internal geometry of the field: pillar gridding. RFT, Contacts & compartments identification.
• Distribution of Properties: scale up (porosity, NTG, .). Facies and property modelling.
• Calculate the volumes of hydrocarbons in place: volumetric with uncertainty on contact.
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