Active Geophysical Monitoring

Section 1: General Concepts and Historical Review

1. General Concept of Active Geophysical Monitoring

1.1 - Large-scale geophysical surveys of the Earth’s crust using high-power electromagnetic pulses

1.2 - Development of Marine Seismic Vibrator and Experimental Results

1.3 - Seismic active monitoring system concept–Advantages of Using the Complex Envelope

1.4 - Elements of active geophysical monitoring theory

1.5 - Active vibromonitoring: experimental systems and fieldwork results


2. Active monitoring targets

2.1 - Active geophysical monitoring of hydrocarbon reservoirs using electromagnetic methods

2.2 - Joint iterative migration of surface and borehole gravity gradiometry data

2.3 - Feasibility study of gravity gradiometry monitoring of CO2 sequestration in deep reservoirs using surface and borehole data

2.4 - Feasibility study of reservoir monitoring using the induced polarization effect associated with nanoparticles

Section 2: Theory and Technology of Active Monitoring

3. Technology of Active Monitoring

3.1 - Nonlinear processes in Seismic Active Monitoring

3.2 - Optical principles of distributed sensing

3.3 Geophysical exploration at Ohnuma geothermal area using optical fiber system

3.4 DAS-VSP at Sumikawa geothermal field

3.5 - Passive monitoring of subsurface active fluid flow

3.6 - Development of large load capacity externally pressurized gas journal bearings for rotary-type vibration exciters with large static imbalance

3.7 - Electromagnetic—accurately controlled routinely operated signal system and corresponding tensor transfer functions in diffusion field region

3.8 - Active monitoring technology in studying the interaction of geophysical fields


4. Theory of Data Analysis and Interpretation

4.1 - Maxwell’s equations and numerical electromagnetic modeling in the context of the theory of differential forms

4.2 - 3D electromagnetic holographic imaging in active monitoring of sea-bottom geoelectrical structures

4.3 - Foundations of the method of EM field separation into upgoing and downgoing parts and its application to MCSEM data

4.4 - Geothermal resource exploration using 3D joint Gramian inversion of airborne gravity gradiometry and magnetotelluric data


5. Signal Processing in Active Monitoring and case histories

5.1 - Effect of spatial sampling on time-lapse seismic monitoring in random inhomogeneous media

5.2 - Characteristics of ACROSS signals from transmitting stations in the Tokai area and observed by Hi-net

5.3 - Stacking Strategy for Acquisition of an ACROSS Transfer Function

5.4 - Time-lapse detecting possible pre-slip preceding the future Nankai Trough mega-earthquake using the seismic reflection change at the subducting Philippine Sea Plate

5.5 - Active and passive monitoring towards geophysical understanding of interplate seismogenesis in the offshore

5.6 -ACROSS time lapse for the field study in the desert area of Saudi Arabia

5.7 - Seimic time lapse imaging of air injection using single ultra-stable ACROSS seismic source and the reverse time imaging method

5.8 – Decomposition and utilization of source and receiver ghosts in marine seismic reflection survey data

Section 3: Case Histories

6. Regional Active Monitoring Experiments

6.1 - Active surface and borehole seismic monitoring of a small supercritical CO2 injection into the subsurface: experience from the CO2CRC Otway Project

6.2 - Geophysical monitoring at the Nagaoka pilot-scale CO2 injection site in Japan

6.3 - Comprehensive seismic monitoring of an onshore carbonate reservoir: a case study from a desert environment