Optimization of Geophone Array for Monitoring Geologic Carbon Sequestration Using Double-Difference Tomography

Abstract

Synthetic data were analyzed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Double-difference tomographic inversion was peiformed on 125 synthetic data sets: five stages of COJ plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model was compared quantitatively to its respective synthetic velocity model to determine accuracy. The results were examined to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-differencetomography. The geophone arrays with widely varying geophone locations, both laterally and vertically, peiformed best.

Research on Geophone Array Method and Forward and Inversion Algorithm in Micro-seismic Positioning and Monitoring System

“…The best motion track for the seismic wave when it travels in the medium can be found out by Ray Tracing Theory [6]. The theory shows the field energy distribution of the seismic wave, and helps in calculating the coefficient of reflection and projection, simulating the phase and amplitude of many kinds of wave fields.…”

“…Hence it can reflect the effect of seismic events in stratum and some activities in the underground. One of the main tasks of the seismic positioning and monitoring system is to locate where the shock is [4][5][6]. Especially, the geophone array plays a key role in the system as it determines whether the system could work effectively.…”

A seismometer phase-sensitive detection circuit design

“…With the development of society, the prediction and the early warning of the earthquake are attracting more and more attention, the requirement of the precise seismic geophone is also increased [1][2][3][4][5][6][7][8] . Seismic geophones are the instruments used to convert the signals of the earth shake into computer-readable digital images/signals for analysis.…”