Subsurface Facies Analysis - Defining Reservoir Geometry & Production Fairways | RILS

Acquisition & processing, and structural analysis

· Image & Dip Acquisition & Processing

    - Measurement principles and wellsite acquisition

    - Value of high resolution image data

    - Image processing & display

    - Dip computation and trouble shooting

· Exercise with some real data

    - Image & dip processing and LQC

    - Image description & interpretation steps

    - Comparison with core photos and description

· Guide to Image Quality

    - Exercises in bad borehole and tool responses

· Structural analysis using image & dip data

    - Structural dip trends and structural dip removal

    - Unconformities

    - Normal and growth faults

    - Reverse and thrust faults

    - Are faults sealing?

Sedimentology & continental settings

· Stratigraphic analysis using image & dip data, 60 slides

    - Depositional environments & facies analysis

    - Lithofacies from log & image data

    - Lithology, grain size variation, need to integrate

    - Geometry

    - Sedimentary structures

    - Paleocurrent directions

    - Integration & modelling at the field level

· Eolian (wind-blown) sediments

    - Sedimentary structures & dune forms

    - Complexities in deposition setting & stratigraphic section

    - Building reservoir model & populating with data

    - Outcrop studies as input to reservoir simulation

· Fluvial (river) sediments

    - Fluvial settings (various models)

    - Braided system lithotypes & sedimentary features

    - Meandering system lithotypes & sedimentary features

    - Point bar development (predictions)

    - Channel models as developed by geostatistics

    - Channel models constrained by outcrop analogues

    - Correlation and sequence stratigraphic considerations

    - Case study from Kalimantan; integrating high resolution seismic attributes with petrophysical data to fine tune a depositional model and site new wells; radically increasing oil recovery in the field.

Deltaic, coastal and shelf settings

· Deltaic sediments

    - Delta classifications and models

    - Associated sand geometries

    - Image & dip character in distributary fronts & channels

    - Case study from South Sumatra basin; developing a play concept to identify most prospective area within structural closure

· Coastal & shelf sediments

    - Interrelation of coastal & shelf depositional settings

    - Facies variation in prograding coastal sequences

    - Idealized dip and grain motifs in bar/barrier sands

    - Image & dip examples in shelf bar and barrier island sands

    - Channel sands in a tidal setting

    - Chasing channels by integrating image and seismic data

    - Case study: distinguishing channel from bar sands in tidal settings, and its importance on reservoir characteristics

    - Use of Nuclear Magnetic Resonance to distinguish sand units

    - Using high resolution images to interpret thinly bedded reservoirs

· Correlation Exercise

    - Environments make a difference

Carbonate shelf & Deepwater

· Sequence Stratigraphy

    - Parasequences & basin margin architecture

    - Aid to correlation & modelling

· Carbonate shelf sediments

    - Carbonate models and facies in coastal and shelf settings

    - Carbonate reefs, and orienting reefal trends

    - Porosity enhancement and reduction

    - Sequence stratigraphy in carbonate sequences

    - Generating reservoir model from outcrop data and 3D seismic

Case study: Kazakhstan Tengiz-Kashagan Trend

Case study: Carbonate rock typing; Corelab approach

· Deepwater sediments

    - Deepwater sediment depositional models

    - Image & dip character in proximal & distal settings

    - Orienting channel sands using image & dip data

    - Using outcrop work for forward modelling to better interpret seismic, and understand reservoir production behavior

Case study: Improving log interpretation by modelling thin bed effects

Fractured reservoirs

· Fracture systems

    - Fracture types; open, healed, vuggy, syneresis

    - Natural or induced; borehole breakout & tensile fractures

    - Impacts on planning fracture jobs for stimulation

    - Fracture orientation

· Fractured Reservoir case studies

    - Case study: Identifying & evaluating producing horizons in fractured basement offshore Vietnam

    - Case study: Simulation of a producing fracture system in a Mid-East Giant

· Geothermal systems in volcanic rocks (optional)

    - Lithofacies in volcanic settings

    - Case study: Using images to resolve reservoir delineation and development issues.