William Brian Medlin

US Patent:

43786987, Apr 5, 1983

Filed:

May 1, 1981

Appl. No.:

6/259770

Inventors:

Lucien Masse - Dallas TX
William L. Medlin - Dallas TX
James H. Sexton - Duncanville TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01N 2900

US Classification:

73579

Abstract:

A harmonic oscillator and motion detection system for use in measuring dynamic elastic constants of rock material samples includes a pair of masses vertically suspended from a support position by a pair of wires. At least one mass is driven by a permanent magnet with the driving coil positioned in the air gap to the magnet. The rock sample is horizontally positioned between the pair of masses such that the rock sample acts as a spring element connecting the masses, thereby forming the simple harmonic oscillator. The motion detection system includes a pair of coil-magnets mounted to each mass for use in determining the amplitude and phase of the motion of the pair of masses.

US Patent:

49072048, Mar 6, 1990

Filed:

Mar 31, 1989

Appl. No.:

7/331153

Inventors:

William L. Medlin - Dallas TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01V 140

US Classification:

367 35

Abstract:

An acoustic borehole logging tool traverses a fluid-filled cased well with an acoustic energy transmitter. Pressure waves created in the well fluid by the transmitter generate tube waves in the well casing. A closely spaced receiver detects tube waves that have traveled along the cased wellbore and been reflected by fracture interfaces. These reflected tube waves are recorded and used to identify the top and bottom of any fracture interval in the formation behind the well casing.

US Patent:

39659828, Jun 29, 1976

Filed:

Mar 31, 1975

Appl. No.:

5/563886

Inventors:

William L. Medlin - Dallas TX

Assignee:

Mobil Oil Corporation - New York City NY

International Classification:

E21B 4326

US Classification:

166249

Abstract:

This specification discloses a method of creating a horizontally disposed fracture in a subterranean formation that is penetrated by a wellbore. Two packers are set in the wellbore against the formation to be fractured to define with the wellbore and intermediate the packers a fracture treatment zone. Hydraulic pressure is applied to the fracture treatment zone in an amount slightly less than that required to create a vertical fracture in the formation. Acoustical energy is applied in the fracture treatment zone to form a resonant condition therein and to provide rigid coupling of acoustic stress pulses between the packer and the formation and form a horizontal fracture in the formation. The horizontal fracture is propagated into the formation by the continued application of the hydraulic pressure to the fracture treatment zone.

US Patent:

44098375, Oct 18, 1983

Filed:

Dec 30, 1980

Appl. No.:

6/221479

Inventors:

William L. Medlin - Dallas TX
Lucien Masse - Dallas TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01N 2900

US Classification:

73579

Abstract:

A simple harmonic oscillator for use in measuring dynamic elastic constants of rock material samples includes a pair of masses vertically suspended from a support position by a pair of wires. At least one mass is driven by a permanent magnet with the driving coil positioned in the air gap to the magnet. The rock sample is horizontally positioned between the pair of masses such that the rock sample acts as a spring element connecting the masses, thereby forming the simple harmonic oscillator. Resonance measurements are determined for various pore fluid contents by introducing various ratios of gas/water/oil into the rock sample.

US Patent:

44176210, Nov 29, 1983

Filed:

Oct 28, 1981

Appl. No.:

6/315781

Inventors:

William L. Medlin - Dallas TX
Gary L. Zumwalt - Dallas TX

International Classification:

E21B 4316

US Classification:

166249

Abstract:

The present invention relates to a method for recovering oil from a subterranean, viscous oil-containing formation by injecting a gaseous driving fluid such as carbon dioxide into the formation and recovering oil therefrom while simultaneously transmitting vibrations in the seismic frequency range having an amplitude not exceeding 100 Angstrom units through the formation which enhances the flow of the carbon dioxide and thereby increases the efficiency of recovering the oil. The frequency of the vibrations is within the range of 0. 1 the 500 Hz and preferably 1 to 100 Hz.

US Patent:

44150350, Nov 15, 1983

Filed:

Mar 18, 1982

Appl. No.:

6/359398

Inventors:

William L. Medlin - Dallas TX
Malcolm K. Strubhar - Irving TX
John L. Fitch - Dallas TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

E21B 4326

US Classification:

166308

Abstract:

A well casing penetrating a plurality of subterranean hydro carbon-bearing formations is perforated adjacent select ones of such hydrocarbon-bearing formations that are expected to exhibit at least a minimum pressure increase during fracturing operations. A fracturing fluid is pumped down the well through the perforations, and into the formations so as to fracture each of the select formations during a single fracturing operation.

US Patent:

43855202, May 31, 1983

Filed:

May 1, 1981

Appl. No.:

6/259774

Inventors:

Lucien Masse - Dallas TX
William L. Medlin - Dallas TX
James H. Sexton - Duncanville TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01N 2900

US Classification:

73579

Abstract:

Circumferential and longitudinal strain measurements are carried out on a rock material under oscillatory loading conditions at seismic frequencies. The phase angle between each of these strains and the oscillatory driving force is determined by synchronous and quadrature detection.

US Patent:

47424958, May 3, 1988

Filed:

Jan 27, 1986

Appl. No.:

6/822506

Inventors:

William L. Medlin - Dallas TX
Vasel R. Slover - Irving TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01V 140
G01V 114

US Classification:

367 31

Abstract:

An acoustic transmitter for borehole logging includes a flexure disc acoustic source affixed to one end of an open-ended pipe. A rubber boot surrounds the pipe and flexure disc source and fluidly isolates them from the surrounding borehole fluid. Oil fills the rubber boot and pipe, such that the borehole fluid pressure is transmitted through the rubber boot to the oil. The flexure disc source is electrically excited to cause the transmitter to generate acoustic energy tube waves at one of the resonances of the flexure disc source within the seismic frequency range.