Resumo

VANZELER, Francisco  e  PRIIMENKO, Viatcheslav. Modelagem numérica do efeito sismoelétrico em meios 2D. Rev. Bras. Geof. [online]. 2009, vol.27, n.1, pp. 63-80. ISSN 0102-261X.  http://dx.doi.org/10.1590/S0102-261X2009000100006.

This work uses the equations of the coupled poroelastic-electromagnetic phenomena to simulate by finite-difference methods the seismoelectric responses of 2D saturated porous models. The seismic source was of explosive type with frequencies in a seismic range up to 100 Hz. The receivers were arranged in horizontal and vertical positions. Several heterogeneous porous models were simulated to define the interface type enabling the generation of seismoelectric signals, the minimum dimension of heterogeneity that is possible to detect and the maximum investigation range of seismoelectric tools. The seismoelectric response was observed at interface of porosity, salinity, lithology and oil-water contact. These results provided a quantitative base for planning of seismoelectric acquisition jointly with surface seismic, well and interwell seismic tools for targets inside of the investigation range.

Palavras-chave : electrical and seismic fields; electrokinetic coupling; porous saturated media; numerical modeling; finite differences.