Earth formation porosity estimation method

Details Earth formation porosity estimation method Earth formation porosity estimation method

1992-12-14

1997-09-02

McMahon, Timothy

Chemistry: analytical and immunological testing

Geochemical, geological, or geothermal exploration

In situ testing

73 38, 7315205, 7315214, 324333, E21B 4900, G01N 1508

Patent

active

056630735

ABSTRACT:
A method for determined porosity of an earth formation surrounding a borehole without prior knowledge of formation lithology. Neutron logging tools are used to measure thermal neutron porosity, epithermal neutron porosity and formation absorption cross section. Two calculating methods are used for a series of assumed porosity values to calculate matrix diffusion length. Matrix diffusion lengths calculated by the two methods are compared to find the highest assumed porosity for which the calculated diffusion lengths are substantially the same. This highest porosity value is the actual formation porosity.

REFERENCES:
patent: 2528882 (1950-11-01), Hayward
patent: 2648056 (1953-08-01), Jakosky
patent: 3802259 (1974-04-01), Eckels
patent: 4543821 (1985-10-01), Davis
patent: 4644283 (1987-02-01), Vinegar
patent: 4716973 (1988-01-01), Cobern
patent: 4981036 (1991-01-01), Curry
patent: 5095745 (1992-03-01), Desbrandes

Affiliated with

Also associated with

Rating

Earth formation porosity estimation method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Earth formation porosity estimation method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth formation porosity estimation method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-307537