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SG 1.2. Difficult reservoirs and unconventional natural gas resources

WOC 1: Exploration & Production of Natural Gas. SG 1.2. Difficult reservoirs and unconventional natural gas resources. Kamel Eddine CHIKHI Associations Director SONATRACH. Moscow Meeting 25-27 September 2006. Study Group Topics. Difficult reservoirs and unconventional resources

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SG 1.2. Difficult reservoirs and unconventional natural gas resources

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  1. WOC 1: Exploration & Production of Natural Gas SG 1.2. Difficult reservoirs and unconventional natural gas resources Kamel Eddine CHIKHI Associations Director SONATRACH Moscow Meeting 25-27 September 2006

  2. 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).

  3. Unconventional Reservoirs – A permanent Challenge

  4. 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

  5. Difficult reservoirs • 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.

  6. 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

  7. Unconventional Natural Gas Resources • Expected 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

  8. Study Group 1.2 • 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

  9. Unconventional Reservoirs

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