Geological Expression A New Approach to Volume Interpretation. Gaynor Paton, ffa

Transcription

1 Geological Expression A New Approach to Volume Interpretation Gaynor Paton, ffa

2 The Value of Data Frontier exploration High exploration costs Uncertain returns $$$ Mature basins Marginal Returns Geological subtleties Play uncertainties Compartmentalisation Traps Migration pathways Understanding Seals Delineation Better Information Improved Understanding More informed decisions ~$8000M global annual spend on seismic acquisition and processing. 11,500,000 sq km of licensed offshore acreage most covered by seismic 2

3 The Value of Data The Value of Data comes from the Information it contains... Conventional horizon and fault interpretation captures only a small fraction of the information contained in seismic data. The majority of information is only accessed by analysing the seismic character Attribute Analysis More processing can lead to information overload rather than better understanding. the Value of Information is in the Understanding it confers. Geological Expression : Data Driven - Interpreter Guided method for highlighting and extracting geological features 3

4 Geological Expression Workflow Attribute Analysis 4

5 Geological Expression Workflow Geological Expression 5

6 Geological Expression Workflow Data Driven Interpreter Guided Horizon Interpretation 3D Geological Modelling & Well Planning Data Reconnaissance Geobody Delineation Data Conditioning Fault Imaging Fault Interpretation & Analysis 6

7 Geological Expression Workflow Interpreter Guided Manual Horizon Interpretation Interpretation Data Driven Interpretation 3D Geological Modelling & Well Planning Data Reconnaissance Geobody Delineation Data Conditioning Fault Imaging Fault Interpretation & Analysis 7

8 Geological Expression Workflow Data Driven Manual Horizon Interpretation Interpretation Data Driven Interpretation 3D Geological Modelling & Well Planning Data Reconnaissance Geobody Delineation Data Conditioning Fault Imaging Fault Interpretation & Analysis 8

9 Geological Expression Workflow Data Driven Interpreter Guided Manual Horizon Interpretation Interpretation Analogues Data Driven Interpretation High Resolution 3D Geological Modelling & Well Planning Data Reconnaissance Experience Geological context Objective Geobody Delineation Fast Data Conditioning Fault Imaging Fault Interpretation & Analysis 9

10 Geological Expression Workflow To be successful, Geological Expression workflows must encompass: On-demand extraction of geological features Interactive fault delineation Interactive geobody delineation Interactive seismic facies classification Speed of Analysis = Speed of Interpretation 10

11 Compute power at your desktop Why is compute power important? Volume Attribute Computation Times (200 sq km) Different interpretation scenarios Combine objective seismic analysis with expert assessment of the geological meaning Results instantly available to keep up with the train of thought Minimise data overload. Time (minutes) 1 wk Single core Multi - core 100 s GPU Computing technology has not reached a steady state. Costs ( /Gflop) will continue to fall: Architectures will continue to change. 11

12 Geological Expression Challenges & Solutions Software design - More than just number crunching Must accommodate large geological variations and large data variations Must provide new information Must recognise that seismic doesn t give the whole answer Mustn t exacerbate the problem of data overload Must facilitate a smooth flow of information Understanding Knowledge Experience Information 12

13 GeoTeric Geological Expression software 13

14 GeoTeric 14

15 Geology Directed Workflow Structure Clastics Carbonates Shales Salt / Sub-Salt 15

16 Geology Directed Workflow Structure Clastics Carbonates Shales Salt / Sub-Salt etc Injected Sands Sheet Sands Strat.Traps Channel Sands 16

17 Colour Visualisation and Analysis Improved Attribute Algorithms Colour Blending N Ductile 2km Semblance Displacement Lithology / Fluid change Discontinuity Tensor 17

18 New Seismic Analysis Workflows Seismic Fault Damage Zone Analysis. 1km Providing access to more and previously inaccessible information. 18

19 Colour Visualisation and Analysis Colour Image Processing 19 Conventional Amplitude Map Image courtesy of Statoil

20 Data Driven Interpreter Guided workflows? 20

21 Data Driven Driven Interpreter Interpreter Guided Workflows Guided workflows 21

22 Data Driven Interpreter Guided workflows Adaptive Geobodies Channels Karsts Can now extract any stratigraphic feature that is visible in the data Salt Horizons 22

23 Geological Expression workflow Integration of Well Information Horizon Interpretation Well Planning Data Reconnaissance Fault Interpretation & Analysis Data Conditioning Fault Imaging Geobody Delineation 23

24 Combined Well & Seismic Data Workflows Well driven segmentation Real time hierarchical seismic facies definition controlled by well data Developed in Collaboration with Statoil 24

25 High Definition Frequency Decomposition Input data Standard Frequency Decomposition HD Frequency Decomposition 25

26 Summary Geological Expression The Future of Seismic Interpretation Interactive Data Driven Interpreter Guided approach Large productivity gains Geological Expression workflows will give us the power to make the most informed seismically driven decisions. 26

27 Summary Geological Expression: A more efficient path from seismic to drilling....delivering more accurate results with greater certainty. 27

28 Thank You Put new levels of seismic interpretation at your fingertips