1
Julius Podhrasky, Eve S Sprunt: System for transmitting ultrasonic energy through core samples. Mobil Oil Corporation, Charles A Huggett, Michael G Gilman, George W Hager, April 26, 1983: US04380930 (201 worldwide citation)

A system for measuring ultrasonic (50 Khz-10 Mhz) velocity and attenuation in core samples employs transmitting and receiving transducers for generating and receiving ultrasonic energy in a core sample. The transducer and core sample are contained in a high pressure cell. The transducers are isolate ...


2
Alfred R Jennings Jr, Eve S Sprunt: Unique method of hydraulic fracturing. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, Charles A Malone, April 4, 1995: US05402846 (188 worldwide citation)

An improved method for hydraulically fracturing a formation or reservoir where a thermo-setting gellable mixture is utilized. This thermo-setting mixture is foamed either at the surface or in situ under fracturing pressures and conditions. The mixture and carrier fluid is of a composition such that ...


3
Eve S Sprunt, Alfred R Jennings, Robert S Timmer: Formation fracturing. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, November 1, 1994: US05360068 (121 worldwide citation)

An oxygenated foam is injected into a hydrocarbon-bearing reservoir within a diatomite-containing subsurface formation to hydraulically form a fracture within the reservoir. Combustion is initiated between the oxygenated foam and hydrocarbons within the reservoir to burn the formation and alter diat ...


4
Eve S Sprunt, Samuel H Collins: Method for measuring wettability of porous rock. Mobil Oil Corporation, Alexander J McKillop, Charles J Speciale, George W Hager Jr, December 3, 1991: US05069065 (95 worldwide citation)

A core sample of a porous rock having a wettability representative of a subterranean formation is saturated with a first medium. This first medium is then displaced with an immiscible second medium. Capillary pressure versus wetting phase saturation is measured during the displacement of the first m ...


5
Ali H Dogru, Eve S Sprunt: Method for determining relative permeability of a subterranean reservoir. Mobil Oil Corporation, Alexander J McKillop, Charles J Speciale, George W Hager Jr, September 19, 1989: US04868751 (56 worldwide citation)

A core sample from a subterranean reservoir is placed in a pressure cell holder and the core pressure is measured at a plurality of pressure points along the core before and during fluid flooding. A computed tomography (CT) scanning system provides images of the density distribution within the core ...


6
Eve S Sprunt, Nizar F Djabbarah: Method including electrical self potential measurements for detecting multiphase flow in a cased hole. Mobil Oil Corporation, A J McKillop, G W Hager, C A Malone, May 25, 1993: US05214384 (34 worldwide citation)

A method for time lapse electric logging in a cased hole in which electrodes are implanted in the casing or the hole is completed with a gravel packed non conductive, perforated liner that allows an open hole logging tool to be used for time-lapse logging. Thereafter, the implemented electrodes or a ...


7
Eve S Sprunt, David P Yale: Method for determining reservoir characteristics of a porous material. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, George W Hager Jr, January 24, 1989: US04799382 (31 worldwide citation)

Measurements of reservoir characteristics of a core sample of a subsurface formation are carried out with the core sample being subjected to pressure cycling. Pore volume changes during such pressure cycling are measured. Pore compressibility is determined from a plot of the measured pore volume cha ...


8
Eve S Sprunt, Neil V Humphreys, Ernest L Muegge, James R Dixon Jr: Method for determining lithological characteristics of a porous material. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, George W Hager Jr, August 18, 1987: US04688238 (29 worldwide citation)

A substantially cylindrical sample of a porous material is surrounded by an elastic jacket and placed in a confining pressure cell. Pressure is supplied to the cell to press the jacket into contact with the surface of the sample. The pressure is varied over a plurality of pressure points and is scan ...


9
Ernest L Muegge, Jorge J Faz, Eve S Sprunt: Method for identifying porosity and drilling mud invasion of a core sample from a subterranean formation. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, George W Hager Jr, January 26, 1988: US04722095 (25 worldwide citation)

A core sample invaded by drilling mud is scanned with X-rays and computed tomographic images are produced. The images are calibrated to a density scale based on the barite content of the drilling mud. The mud solid volume in the pores of the core sample are determined from the density contrast creat ...


10
Samuel H Collins, Eve S Sprunt: Method for desaturating a porous rock for electrical resistivity measurements. Mobil Oil Corporation, Alexander J McKillop, George W Hager Jr, May 11, 1993: US05209104 (22 worldwide citation)

A porous rock is saturated with a first fluid and electrical resistivity is measured along its length. A second fluid, immiscible with the first fluid, is injected into the porous rock at a first flow rate. This injection continues until displacement of the first fluid from the porous rock ceases an ...