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Geospectra Infrasonic Passive Spectroscopy (IPDS®): A Proven Revolutionary Technology for Direct Discovering Hydrocarbon Structural and Non-Structural Traps and for Reservoir Monitoring

Monzer Makhous and Ernst-D. Rode
Business Development, GeoDynamics International, Abu Dhabi, United Arab Emirates

The anomalous absorption/emission of micro-seismic noise is used for direct detection of oil/gas accumulation (OGA) trapped in a porous matrix/reservoir without need of any external source. However, applying an external actuator agent produces a much more distinct effect and OGA housed in a porous matrix passes into a state of an attractor, where its micro-seismicity “noise” drastically increases. Measuring the characteristic spectral amplitude of this generated and amplified natural micro-seismic noise defines the presence or the absence of OGA. The spectral amplitude of background micro-seismic emission above the OGA exceeds considerably that of outside the OGA in the frequency range 0.1-10 Hz.

The OGA is excited/activated by external artificial or natural field of elastic vibration in frequency range of effective interaction of this field with the hydrocarbons enclosed in porous reservoir matrix. In these conditions, the OGA passes in generation of its proper infra-acoustic waves. The mechanical energy of hydrodynamic nature is simply transforming in acoustic energy generating the IPDS waves/signals. This model assumes a capillary-bubble environment and links the described phenomena to evaporation and condensation of fluids in presence of electrical charges.

Passive Seismic-IPDS® is a technology for direct Reservoir Hydrocarbon detection independently of the reservoir type: structural or not. This technique is based on the principles that the hydrocarbon reservoir as a multi-fluids system in porous medium has an unconventional (non linear) transfer characteristic for acoustic waves. Hydrocarbon fluid in porous system of reservoir rocks can be detected as a characteristic deformation of the natural earth noise spectra in the acoustic low frequency range between 0.1 and 10 Hz.

Presentation GEO India Expo XXI, Noida, New Delhi, India 2008©AAPG Search and Discovery