USC_Sec_4_Logging_Environ_doc

USC_Sec_4_Logging_Environ_doc - University of Southern...

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University of Southern California Department of Petroleum Engineering Fall, 2007 PTE-461 Formation Evaluation Section 4: Logging Environment Donald G. Hill, Ph.D. California Registered Geophysicist 170 California Registered Geologist 6043 Kentucky Registered Professional Geologist 1624 Texas Licensed Professional Geophysicist 6289 Consulting Petrophysicist: Petrophysics, Shallow Geophysics, Borehole Geophysics, and Subsurface Geology Planning, Oversight, and Interpretation 1012 Hillendale Ct +(925) 437-5748 Cell Walnut Creek, CA +(309) 420-7354 FAX USA 94596 +(925) 947-1541 Home http://www.hillpetro.com [email protected]
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USC PTE-461, Formation Evaluation - Fall, 2007 Section 4: Logging Environment Donald G. Hill, Ph.D., R.Gp, R.G., R.P.G., L.P.Gp. Page: 4-2 [email protected] Table of Contents Subject Page Wellsite 4-4 Logging Unit 4-4 Logging Operations 4-6 Well Logs 4-10 Log Header 4-10 Log Suites vs. Log Runs 4-12 Tool Stack Information 4-12 Calibration Records 4-13 Measurement Tracks 4-14 Depth Measures and Scales 4-14 Borehole Model 4-15 Borehole Diameter 4-15 Borehole Fluids 4-16 Mud Column 4-20 Mud Cake 4-22 Flushed Zone 4-22 Invaded Zone 4-22 Uninvaded Zone 4-24 Subsurface Temperatures 4-24 Geothermal Model 4-24 Thermal Disturbances Due to Drilling 4-26 References 4-30 Useful Websites 4-32 Tables Table 4.1: Wireline Logging Job Operations 4-5 Table 4.2: Logging Run Parameters 4-7 Table 4.3: Tool String Table 4-7 Table 4.4: Shop Calibration Summary 4-9 Table 4.5: Pre-Log Calibration Summary 4-10 Table 4.6: Post-Log Calibration Check Summary 4-11 Table 4.7: Typical Bit and Casing Program 4-15 Table 4.8: Open-Hole borehole Fluids 4-16 Figures Figure 4.1: Wireline Data Collection, Recording, and Analysis Montage 4-4 Figure 4.2: Cut-Away Depiction of a Wireline Logging Unit 4-5 Figure 4.3: Example of a Well Log Header 4-6 Figure 4.4: Logging Tool String Sketch 4-8 Figure 4.5: Common Well Log Scales 4-12
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USC PTE-461, Formation Evaluation - Fall, 2007 Section 4: Logging Environment Donald G. Hill, Ph.D., R.Gp, R.G., R.P.G., L.P.Gp. Page: 4-3 [email protected] Figure 4-6: Borehole Model for Petrophysics 4-13 Figure 4.7 Gamma Ray Departure Curves for Borehole Size and Mud Weight 4-17 Figure 4.8: Preferred Resistivity/Porosity Ranges for Induction and Laterolog Resistivity Tools 4-18 Figure 4.9: Dual Laterolog (DLL) Borehole Correction Departure Curves 4-19 Figure 4.10: Micro-Spherically Focused Log (MSFL) Mud Cake Corrections 4-20 Figure 4.11: Dual Laterolog (DLL) Tornado Chart 4-21 Figure 4.12: NaCl Resistivity Variation with Temperature and Salinity 4-22 Figure 4.13 International Temperature Gradients 4-23 Figure 4.14 Temperature and Thermal Gradient profiles in a Geothermal Well, which Intersects an Open Fault with Hot Water Circulation, Western US 4-24 Figure 4.15 Composite Field Temperature-Depth Model showing Low Temperature Excursions from Trend, Suggesting High Volume Inflow of Low Temperature Surface Waters, Oceana 4-25 Figure 4.16 Mud (in and out) Temperatures, Measured, Extrapolated, and
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USC_Sec_4_Logging_Environ_doc - University of Southern...

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