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Table of Contents <br />P~ <br />Section 1.0 Introduction .................................................................................................. l <br />Section 2.0 Survey Procedure .........................................................................................2 <br />Section 3.0 Data Analysis ...............................................................................................3 <br />3.1 Preparation of Seismic Data Files for Analysis ..................................................... 3 <br />3.1.1 Measuring the Source Time ............................................................................. 3 <br />3.1.2 Defining Velocity Model .................................................................................4 <br />3.2 Data Processing ......................................................................................................4 <br />Section 4.0 Data Interpretation ....................................................................................... 4 <br />Section 5.0 Conclusions ..................................................................................................4 <br />Appendix A. Seismic Velocity Tomographic Images .................................................... 6 <br />Appendix B. Technical Specifications for Hydrophones ............................................... 7 <br />Appendix C. NSA Record Triggering Device ................................................................ 8 <br />Appendix D. Assessing Actual Source Time (Time Break) ........................................... 9 <br />Appendix E. Outline for Recommended Full-Scale Monitoring System .....................10 <br />Figures <br />A1. Geological profile and steel pipes in We1128-21 at the survey site. <br />A2. Temperature plot in production pipe of We1128-21. <br />A3. First configuration of hydrophones and seismic sources. <br />A4. Second configuration of hydrophones and seismic sources. <br />A5. Third configuration of hydrophones and seismic sources. <br />A6. Time-versus-distance plots for two typical seismic waves. <br />A7. Typical record of seismic waves generated by firing a shot 2,160 feet below the <br />surface. <br />A8. Cross-section through the well alignment and contour anomalies showing location <br />and extent of detected caverns associated with solution mining and some anomalies <br />above the mining zone. <br />A9. Contour anomalies showing location and average extent of detected caverns <br />associated with solution mining, and some anomalies above the mining zone. <br />Cl . Block schematic of NSA nonintrusive, intrinsically safe triggering device. <br />D 1. Impulse generated by actual blase -break time. <br />D2 Waves traveling along steel pipe from a hammer strike on surface to hydrophones at <br />depths between 1, 537 and 1,717 feet. <br />