Active Geophysical Monitoring

CHAPTER 21

EFFECT OF SPATIAL SAMPLING ONTIME-LAPSE SEISMIC MONITORING INRANDOM HETEROGENEOUS MEDIA

Jun Matsushima^a and Osamu Nishizawa^b

Contents

1. Introduction

2. Proper Spatial Sampling Interval in Seismic Reflection

3. Numerical Simulations

3.1. Random heterogeneous model

3.2. Wave field calculation

4. Results

4.1. Stacked and migrated sections

4.2. Difference sections

5. Discussion

5.1. Independent time series noise and induced scattered wave noise

5.2. Spatial sampling interval and the truncation artifact

6. Conclusions

References

1. INTRODUCTION

Time-lapse seismic monitoring using active sources is a promising technology to monitor changes in dynamic physical properties as a function of time by analyzing differences between seismic data ...