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DATA FLOW

ISSUES RELATED TO LOG DATA MAMANGEMENT IN ONGC POSC REGIONAL SIG SEMINAR 14 TH JAN. 2005, NEW DELHI. DATA FLOW. FIELD ACQUISITION. LOGGING SERVICES. Metadata. LIS/ DLIS. LogDB Web. ORIGINAL LOG MANAGEMENT LogDB. COMPOSITE LOG GENERATION GeoFrame. LIS / DLIS. PROCESSING CENTRE

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DATA FLOW

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  1. ISSUES RELATED TO LOG DATA MAMANGEMENTIN ONGC POSC REGIONAL SIG SEMINAR 14TH JAN. 2005, NEW DELHI

  2. DATA FLOW FIELD ACQUISITION LOGGING SERVICES Metadata LIS/ DLIS LogDB Web ORIGINAL LOG MANAGEMENT LogDB COMPOSITE LOG GENERATION GeoFrame LIS / DLIS PROCESSING CENTRE ASSETS/BASINS Processed data COMPOSITE LOG MANAGEMENT Finder END USERS INTERPRETATION WORKSTATIONS

  3. ONGC SCENARIO • EQUIPMENT SUPPLIERS/ SERVICE PROVIDERS • RUSSIAN EQUIPMENTS • SCHLUMBERGER • GEARHART OIL INDUSTRIES • WELEX • HALLIBURTON • SPERRY SUN

  4. ONGC SCENARIO • PROCESSING SOFTWARE • LOGPROC (ONGC DEVELOPED) • GEOFRAME • PETROWORKS • GEOLOG • INTERACTIVE PETROPHYSICS

  5. STANDARDISATION ISSUES RELEVANT TO ONGC • RUSSIAN LOGS • STANDARDIZATION OF LWD TOOLS, SERVICES AND CURVES. • VARIATION IN IMPLEMENTATION OF LIS FORMAT • (SOME COMPANIES ARE PROVIDING DATA IN LIS FORMAT. BECAUSE OF VARIATION IN IMPLEMENTATION OF LIS IT IS NOT POSSIBLE TO EXTRACT SOME ATTRIBUTE INFORMATION)

  6. STANDARDISATION ISSUES RELEVANT TO ONGC • CONTROL PARAMETERS FOR PROCESSING • THOUGH WE ARE PLANNING TO MANAGE PROCESSED DATA, WE DO NOT HAVE ANY SYSTEM TO MANAGE CONTROL PARAMETERS • WHEN DATA RECORDED BY ONE SERVICE COMPANY IS PROCESSED BY SOFTWARE OF ANOTHER SERVICE COMPANY • EXAMPLE OF DIPMETER DATA • ENVIRONMENTAL CORRECTIONS PARTICULARLY CORRECTIONS OF NEUTRON LOG • PROCESSED OUTPUT CURVES

  7. STANDARDISATION ISSUES RELEVANT TO ONGC • DATA MODEL FOR WELL LOGS • SOMETIMES DATA MODEL IS DIFFERENT IN THE DIFFERENT SOFTWARE OF SAME VENDOR • MNEMONICS FOR SPLICED CURVES WHEN TWO DIFFERENT CURVES OF SAME CURVE TYPE ARE SPLICED. FOR EXAMPLE • DT WITH DTL • LLD WITH HLLD

  8. Thank You

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