Numerical evidence of gas hydrate detection by means of electroseismics

FABIO IVÁN ZYSERMAN; PATRICIA MERCEDES GAUZELLINO; JUAN E. SANTOS

JOURNAL OF APPLIED GEOPHYSICS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2012 vol. 86 p. 98 - 108

0926-9851

This work presents numerical evidence that methane hydrate-bearing sediments located below permafrostcan be detected using electroseismics as a prospecting tool. The numerically solved equations are the onesdeveloped by Pride; we modified them by using an extended Biot formulation to appropriately deal with acomposite (rock-ice/rock-methane hydrate) solid matrix. We modeled the subsurface as a two dimensionalmedium, and we used electromagnetic sources to give rise to the so called SHTE and PSVTM modes. Theobtained results show that the seismic response is sensitive to the methane hydrate concentration.