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Definition of carbonate reservoirs. |
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Finding and developing carbonate reservoirs. |
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Sources of data on reservoirs. |
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Unique attributes of carbonates. |
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Suggestions for further reading. |
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2. Rock properties of carbonate reservoirs. |
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Fundamental Rock Properties. |
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Texture, fabric, composition, and sedimentary structures. |
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Classification of Carbonate rocks. |
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Classification of detrital carbonates. |
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Classification of reef rocks. |
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Wright’s genetic classification. |
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Dependent or Derived Rock Properties. |
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Porosity classifications; Archie, Choquette and Pray, Lucia, and Ahr (a new genetic classification). |
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Tertiary Rock Properties . |
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Borehole logs and carbonate reservoirs. |
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Tertiary rock properties and the seismograph. |
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Suggestions for Further Reading. |
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3. Petrophysical Properties of Carbonate Reservoirs. |
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Saturation, Wettability, Capillarity. |
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Capillary Pressure and Reservoir Performance. |
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Capillary pressure, pores, and pore-throats. |
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Converting mercury-air capillary pressure data to oil-water equivalents. |
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Height of oil column above free-water level. |
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Evaluating seal capacity. |
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Fluid Withdrawal Efficiency. |
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Suggestions for Further Reading. |
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4. Stratigraphic Principles. |
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Carbonate Depositional Platforms. |
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Homoclinal and distally-steepened ramps. |
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Rock, Time, and Time-Rock Units. |
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Anatomy of Depositional Units. |
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Facies, successions, and sequences. |
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Environmental subdivisions and standard depositional successions. |
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Definitions and scales of observation. |
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Sequence stratigraphy in carbonate reservoirs. |
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Sequence stratigraphy in exploration and development. |
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Suggestions for Further Reading. |
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5. Depositional Carbonate Reservoirs. |
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Depositional Environments and Processes. |
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The beach-dune environment. |
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Depositional rock properties in beach-dune successions. |
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Tidal flat and lagoon environments. |
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Depositional rock properties in tidal flat-lagoon successions. |
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The shallow subtidal (neritic) environment. |
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Depositional rock properties in shallow subtidal successions. |
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The slope-break environment. |
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Depositional rock properties in slope-break successions. |
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Depositional rock properties in slope successions. |
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Depositional rock properties in basinal environments. |
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Ideal depositional successions illustrated. |
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Paleotopography and Depositional Facies. |
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Diagnosis and Mapping of Depositional Reservoirs. |
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Suggestions for Further Reading. |
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6. Diagenetic Carbonate Reservoirs. |
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Diagenesis and Diagenetic Processes. |
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Definition of diagenesis. |
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Diagenetic Environments and Facies. |
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Diagenetically-Enhanced Porosity. |
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Enhancement by recrystallization. |
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Enhancement by dissolution enlargment. |
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Large-scale dissolution-related porosity. |
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Porosity enhancement by replacement. |
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Recognizing enhanced porosity in reservoirs. |
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Porosity Reduction by Diagenesis. |
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Pore reduction by compaction. |
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Pore reduction by recrystallization. |
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Pore reduction by replacement. |
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Pore reduction by cementation. |
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Recognizing diagenetically-reduced porosity. |
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Diagnosing and Mapping Diagenetic Reservoirs. |
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Suggestions for Further Reading. |
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Fractures and Fractured Reservoirs. |
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Genetic classification of fractures . |
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Where do fractures occur? |
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Fracture Permeability, Porosity, and Sw. |
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Sw in fractured reservoirs. |
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Classification of Fractured Reservoirs. |
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Detecting Fractured Reservoirs. |
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Direct observation of fractures in the borehole. |
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Indirect methods to detect fractures in the borehole. |
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Predicting Reservoir Fracture Spacing and Intensity. |
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Factors that influence spacing and intensity. |
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Identifying and Developing Fractured Reservoirs. |
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Suggestions for Further Reading. |
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8. Summary - Geology of Carbonate Reservoirs. |
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Rock Properties and Diagnostic Methods. |
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Fundamental rock properties and depositional reservoirs. |
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Derived Properties - Porosity and Permeability. |
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Tertiary Properties and Petrophysical Characteristics. |
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Regional scale investigations. |
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Quality ranking of flow units. |
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Finding and interpreting depositional reservoirs. |
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Selected examples of depositional reservoirs. |
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Location, setting, reservoir characteristics, and geological concept. |
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Location, setting, depositional succession, reservoir characteristics, and geological concept. |
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Finding and interpreting diagenetic reservoirs. |
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Field examples of diagenetic reservoirs. |
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Location and background, setting, depositional and diagenetic characteristics, reservoir characteristics, and geological concept. |
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Location, setting, depositional and diagenetic characteristics, reservoir characteristics, and geological concept. |
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Finding and interpreting fractured reservoirs. |
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Field examples of fractured reservoirs. |
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Location, setting, depositional and diagenetic characteristics, and geological concept. |
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Dickinson field area, North Dakota. |
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Location, setting, depositional and diagenetic characteristics, and geological concept. |
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