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MAPPING AND VISUALIZING “DOLOMITE CHIMNEYS”

MAPPING AND VISUALIZING “DOLOMITE CHIMNEYS”. J. R. WOOD MICHIGAN TECHNOLOGICAL UNIVERSITY. ORDOVICIAN PRODUCTION IN MICHIGAN. CHARACTERIZED BY ELONGATE, LINEAR FIELDS TRENDING NW-SE PRIMARY PRODUCTION FROM TRENTON-BLACK RIVER FMS.

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MAPPING AND VISUALIZING “DOLOMITE CHIMNEYS”

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  1. MAPPING AND VISUALIZING “DOLOMITE CHIMNEYS” J. R. WOOD MICHIGAN TECHNOLOGICAL UNIVERSITY

  2. ORDOVICIAN PRODUCTION IN MICHIGAN • CHARACTERIZED BY ELONGATE, LINEAR FIELDS TRENDING NW-SE • PRIMARY PRODUCTION FROM TRENTON-BLACK RIVER FMS. • FRACTURING AND SUBSEQUENT SECONDARY DOLOMITIZATION HAVEDEVELOPED IRREGULAR POROSITY ZONES • MOST FRACTURE ZONES OCCUR ON FLANKS OF MAJOR STRUCTURES TRENDING NORTH OR NORTHWEST • AVERAGE PAY APPROX. 60 FT. • FIELDS USUALLY HAVE GAS CAP & SOLUTION GAS DRIVE SOURCE: OIL & GAS FIELDS SYMPOSIUM, MICHIGAN BASIN GEOLOGICAL SOCIETY

  3. REED CITY & DETROIT RIVER PRODUCTION DEEP RIVER FIELD • DEEP RIVER FIELD • MIDDLE DEVONIAN DOLOMITESPRODUCES FROM “ANOMALOUS”SECONDARY DOLOMITE • 5.5 MI. LINEAR TREND - STRIKES • N 60 W, 1/2 MI. WIDE • ZONE CUTS ACROSS DEEP RIVER DOME SOURCE: OIL & GAS FIELDS SYMPOSIUM, MICHIGAN BASIN GEOLOGICAL SOCIETY

  4. DOE PROGRAM: • FUNDAMENTAL GEOSCIENCE FOR RESERVOIR CHARACERIZATION • PROJECT TITLE: • “ADVANCED CHARACTERIZATION OF FRACTURED RESERVOIRS IN CARBONATE ROCKS: THE MICHIGAN BASIN” • PRINCIPAL INVESTIGATORS: • JAMES R. WOOD, MICHIGAN TECHNOLOGICAL UNIVERSITY, HOUGHTON, MI • WILLIAM B. HARRISON, WESTERN MICHIGAN UNIVERSITY, KALAMAZOO, MI. • DOE PROJECT MANAGER: PURNA HALDER • DOE AWARD NUMBER:DE-AC26-98BC15100 • NAME AND ADDRESS OF SUBMITTING ORGANIZATION: MICHIGAN TECHNOLOGICAL UNIVERSITY, 1400 TOWNSEND DRIVE, HOUGHTON, MI.

  5. POSSIBLE MODEL FOR MICHIGAN “CHIMNEYS”

  6. POSSIBLE MODEL FOR MICHIGAN KARSTIFICATION

  7. CONCLUSIONS • KARSTIFICATION & DOLOMITIZATION ARE PRIMARY PROCESSES IN MICHIGAN RESERVOIRS • RESERVOIR-SCALE FRACTURES CAN BE RELIABLY MAPPED USING CONVENTIONAL DRILLER’S REPORTS • GIS SOFTWARE (e.g. ArcView) FACILITATES RE-MAPPING

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