Global Agency of Geosciences Experts

06-02c Well seismic tie

Objectives

This course teaches about acquisition of well data in all siliclastics and carbonate environments, and fractured reservoirs.

Who should attend

Profesionnals with a Scientific background.

Prerequisites

Background in Geosciences, petroleum geology or basic Petroleum Engineer knowledge

Duration

5 Session

Languages
Geoid Logo Geoid Training available
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1
Session

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?

2
Session

Sedimentology & continental settings

 

  • Stratigraphic analysis using image & dip data,

– 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.

3
Session

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

4
Session

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

5
Session

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.

LECTURERS

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