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Mapping and Visualizing Dolomite Chimneys: Insights from the Michigan Technological University Project

This research focuses on the analysis and visualization of dolomite chimneys in Michigan's Ordovician production areas. Characterized by elongate, linear fields trending NW-SE, these structures show significant gas production from the Trenton-Black River formations. The study highlights the role of fracturing and secondary dolomitization in creating irregular porosity zones, predominantly found on the flanks of major structures. Utilizing GIS software for mapping, this project offers valuable insights into reservoir characterization and karstification processes essential for Michigan's oil and gas production.

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Mapping and Visualizing Dolomite Chimneys: Insights from the Michigan Technological University Project

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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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