high-resolution seismic reflection surveys for fault

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HighResolution Seismic Reflection Surveys Offer Best Geophysical Procedure for Fault Investigations Typical Survey Objectives Realized: Delineation of Fault PlanesFault Plane Subsurface Orientation and Trend Across Site Evaluation of “Possible” Holocene DeformationProject Fault Planes Upward Near Surface h f l b db l where Recency of Faulting can be Investigatedby Direct Geologic Data Determine Best Locations for Trenching or Positioning Exploratory Borings and CPTs Finalize Fault Investigation with Reviewing AgencyIntegrate Subsurface Geologic Data into Seismic Profile Interpretation for More Complete Evaluation of Subsurface Faulting Seismic Profile Interpretation for More Complete Evaluation of Subsurface Faulting Requirements for HigherResolution Reflection Surveys: Use Survey Lines Set up with Single Geophones10 to 40Hertz CutOff Frequency Phones Securely Mounted to the Ground Surface Use MultiChannel 24+ db Seismic Acquisition System to Record 60+ Channel Field Records from CloselySpaced Geophone Positions U Hi h F Si iE S ( h Sl d H Si Use HigherFrequency Seismic Energy Sources (such as Sledge Hammers, Seisgun, or Accelerated Weight Drops) with Triggering for Very Precise Positioning of Time=0 on Field Records Conduct Specialized “NearSurface” Seismic Reflection Data Processing with Knowledge of L lG l i C diti D ’t S dD t t H t D f Oil dG E l ti www.AdvancedGeoscience.com LocalGeologic ConditionsDon’t SendData to Houston or Denver f or Oil andGas Exploration Scale Processing

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Page 1: High-Resolution Seismic Reflection Surveys for Fault

High‐Resolution Seismic Reflection Surveys Offer Best Geophysical Procedure for Fault Investigations

Typical Survey Objectives Realized:

• Delineation of Fault Planes‐ Fault Plane Subsurface Orientation and Trend Across Site

• Evaluation of “Possible” Holocene Deformation‐Project Fault Planes Upward Near Surface h f l b d b lwhere Recency of Faulting can be Investigated by Direct Geologic Data

• Determine Best Locations for Trenching or Positioning Exploratory Borings and CPTs

• Finalize Fault Investigation with Reviewing Agency‐ Integrate Subsurface Geologic Data into Seismic Profile Interpretation for More Complete Evaluation of Subsurface FaultingSeismic Profile Interpretation for More Complete Evaluation of Subsurface Faulting  

Requirements for Higher‐Resolution Reflection Surveys:

• Use Survey Lines Set up with Single Geophones‐ 10 to 40‐Hertz Cut‐Off Frequency Phones y p g p q ySecurely Mounted to the Ground Surface

• Use Multi‐Channel 24+ db Seismic  Acquisition System to Record 60+ Channel Field Records from Closely‐Spaced Geophone Positions

U Hi h F S i i E S ( h Sl d H S i• Use Higher‐Frequency Seismic Energy Sources (such as Sledge Hammers, Seisgun, or Accelerated Weight Drops) with Triggering for Very Precise Positioning of Time=0 on Field Records

• Conduct Specialized “Near‐Surface” Seismic Reflection Data Processing with Knowledge of L l G l i C diti D ’t S d D t t H t D f Oil d G E l ti

www.AdvancedGeoscience.com

Local Geologic Conditions‐ Don’t Send Data to Houston or Denver for Oil and Gas Exploration Scale Processing   

Page 2: High-Resolution Seismic Reflection Surveys for Fault
Page 3: High-Resolution Seismic Reflection Surveys for Fault