3.1.4 Legacy Gravity Data 34 3.1.5 Legacy Well Data 34 3.1.6 Legacy MT and TDEM Data Analysis 35 3.2 New MT and TDEM Data Acquisition 39 3.2.1 Survey Location, Permitting and Design 39 3.2.2 MT and TDEM Field Survey 40 3.3 MT and TDEM Interpretation Data Processing 42 3.3.1 Initial Processing 43 3.3.2 TDEM Inversion and MT Static Correction 44 3.3.3 MT Dimensional Assessment and Inversion 46 CHAPTER 4: Developments in 3D MT Resistivity Imaging 51 4.1 Interpretation Approach 51 4.1.1 3D Forward Modeling 52 4.1.2 3D Inversion 52 4.1.3 Advances in 3D MT Inversion during this Project 53 4.1.4 3D MT Inversion Resolution and Uncertainty 55 CHAPTER 5: Resistivity Interpretation of the Geothermal Resource 56 5.1 Confirmation of Clay-Oriented Resistivity Interpretation 56 5.1.1 Well 88A-28 56 5.1.2 Well 17A-6 60 5.2 MT Maps Illustrating Overall Clay Cap Geometry 61 5.2.1 Map of 3D MT Conductance to 600 m (1969 ft) Depth 62 5.2.2 Maps of Elevation of the Base of the Clay Cap 63 5.3 MT Resistivity Cross-Sections 66 5.3.1 MT Resistivity Cross-Sections Correlated with Wells 67 5.3.2 MT Resistivity Cross-Sections and Reservoir Geometry 71 5.4 MT Resistivity Maps 74 5.4.1 Interpreting Resistivity Maps at Different Elevations 74
3.1.4 Legacy Gravity Data 34 3.1.5 Legacy Well Data 34 3.1.6 Legacy MT and TDEM Data Analysis 35 3.2 New MT and TDEM Data Acquisition 39 3.2.1 Survey Location, Permitting and Design 39 3.2.2 MT and TDEM Field Survey 40 3.3 MT and TDEM Interpretation Data Processing 42 3.3.1 Initial Processing 43 3.3.2 TDEM Inversion and MT Static Correction 44 3.3.3 MT Dimensional Assessment and Inversion 46 CHAPTER 4: Developments in 3D MT Resistivity Imaging 51 4.1 Interpretation Approach 51 4.1.1 3D Forward Modeling 52 4.1.2 3D Inversion 52 4.1.3 Advances in 3D MT Inversion during this Project 53 4.1.4 3D MT Inversion Resolution and Uncertainty 55 CHAPTER 5: Resistivity Interpretation of the Geothermal Resource 56 5.1 Confirmation of Clay-Oriented Resistivity Interpretation 56 5.1.1 Well 88A-28 56 5.1.2 Well 17A-6 60 5.2 MT Maps Illustrating Overall Clay Cap Geometry 61 5.2.1 Map of 3D MT Conductance to 600 m (1969 ft) Depth 62 5.2.2 Maps of Elevation of the Base of the Clay Cap 63 5.3 MT Resistivity Cross-Sections 66 5.3.1 MT Resistivity Cross-Sections Correlated with Wells 67 5.3.2 MT Resistivity Cross-Sections and Reservoir Geometry 71 5.4 MT Resistivity Maps 74 5.4.1 Interpreting Resistivity Maps at Different Elevations 74
CEC-500-2013-063.docx