Kamel Eddine CHIKHIAssociations DirectorSONATRACH
Moscow Meeting25-27 September 2006
Study Group Topics Difficult reservoirs and unconventional resources
1. Difficult reservoirs and technologies for their
exploration and production (sour gas, HT/HP, Deep Gas
(>4,500m, basin center), shallow (<500 m) gas, tight
reservoirs)
2. Unconventional resources and technologies for their
exploration and production (coalbed methane, gas
hydrates, aquifer gas).
Unconventional Reservoirs – A permanent Challenge
Difficult reservoirs – Areas of Concern Study Goals
Definitions Definition of difficult reservoirs Sedimentology & Petrology : Depositional environments reconstitution Subsidence & its consequences Diagenesis & diagenetic sequences Natural fracturation : origin & effects on reservoirs qualities Porosity characterization & classification Geomechanics fundamentals Reservoirs Stimulation
Exploration technologies Anisotropy assessment : spacial development geometry and distribution of and
k Natural fractures characterization & modeling Microfacies standardisation Seismic attributes as a tool to characterize and predict reservoirs properties Formation evaluation dedicated techniques Flow units characterisation & Multilayers modelling Resources & reserves assessment - Uncertainties quantification Drilling fluids design & wellbore stability HTHP & complex reservoirs testing techniques
Production technologies Drainage models & Wells spacing optimization Hydraulic fracturation optimization Reservoir performance modelling Completion of poorly consolidated formation Advanced wells construction : Deviated and horizontal drilling applications Production monitoring & control
Expected results Identification of key technology needs for
understanding Difficult Reservoirs
Address areas of technology improvements needed to face technical gaps in exploration & production
Lower cost of difficult reservoirs development in particular for Play Resources assessment, Subsurface Imaging, Drilling, Well Completion, and Stimulation.
Difficult reservoirs
Unconventional Natural Gas Resources Study Goals
Definitions & Standardization attempt Definition of unconventional gas resources Standardization of the different categories :
Deep & basin centered natural gas, Tight natural gas sands, Shale gas, Coalbed methane, Geopressurized zones, Methane hydrates …
Assessment & Outlook Exploration efficiency Assessment of unconventional Gas Reserves & Resources Technically & Economically recoverable UNGR Role of unconventional gas in world supply for mid & long terms
Exploration & Production technologies Data (seismic & wells) integrated expert systems Basin scale petroleum systems Sourcing modeling Fracturation assessment & modeling Plays / Reservoirs characterization & modeling Well-log interpretation/petrophysical models for detection of
marginal pay Dedicated drilling techniques Wells completion & stimulation : hydraulic, acid … Nanotechnology in reservoirs Monitoring Production Prediction & Optimization Lessons learned for UNGR development & Best practices inventory Cases studies
Unconventional Natural Gas ResourcesExpected results
Review of Definition of what is exactly unconventional gas & propose a classification that, if accepted, can be used in different world regions
Update of the Global trends & the role of unconventional Gas Reserves & Resources in world supply
Fine tuning Exploration techniques & democratization of dedicated technologies for assessing UNGR
Deliver a comprehensive overview of production techniques and best practices overview
Meetings 3 meetings / year : February, June, October Identify locations for forthcoming meetings – Proposals
Themes Questionnaire concerning items to be studied Finalize, prior to next meeting, the list of themes
Contribution Build a data base of external experts to be invited to
contribute to the study Finalize list of members of the group Technical Secretary of SG 1.2
Study Group 1.2
Unconventional Reservoirs
Bureau.scf