Method to characterize microfractured hydrocarbon reservoirs...

Details Method to characterize microfractured hydrocarbon reservoirs... Method to characterize microfractured hydrocarbon reservoirs...

2006-10-24

2006-10-24

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Of subsurface core sample

For magnetic properties

Reexamination Certificate

active

07126340

ABSTRACT:
Subterranean hydrocarbon reservoirs are analyzed by characterizing the relative presence and character of microfractures in rock samples from the reservoirs. Core samples are saturated with a suspension of magnetite particles of known concentration. The samples are then subjected to an applied magnetic field of known strength. The anisotropy of magnetic susceptibility, or AMS, of the samples is then observed, providing a measure of grain orientation in the samples. The characteristics of the microfractures in the samples are thus available to characterize the reservoirs, and in particular the contribution of the microfractures to the porosity and permeability of formations in the reservoirs.

REFERENCES:
patent: 5012674 (1991-05-01), Millheim et al.
patent: 5323855 (1994-06-01), Evans

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