Method for estimating subsurface porosity

Details Method for estimating subsurface porosity Method for estimating subsurface porosity

1987-10-02

1989-03-28

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

364421, 367 57, G01V 100, G01V 130

Patent

active

048170623

ABSTRACT:
The instant invention is a method for accurately estimating the subsurface porosity and porosity-thickness of an interval of interest. A seismic acoustic model is constructed from data collected in a seismic survey. The acoustic model provides information from which predicted porosity values may be calculated. The predicted porosity valves are then cross-plotted with actual porosity valves obtained from well information, providing an accurate estimate of porosity away from the well locations. Porosity thickness is determined using the thickness information provided by the well data.

REFERENCES:
patent: 3883841 (1975-05-01), Norel et al.
patent: 4679174 (1987-07-01), Gelfand
"Resevoir Delineation and Porosity Evaluation from VSP," SPE Unconsolidated Pap #SPE-16462 (May '87).
"Predicting Pore Pressure and Porosity from VSP Data," Annu AAPG-SEPM-EMD-DPA Conv. (San Antonio, 5/84).

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