Terizhandur S Ramakrishnan, R K Michael Thambynayagam: Real time monitoring and control of downhole reservoirs. Schlumberger Technology Corporation, David P Gordon, William B Batzer, November 30, 1999: US05992519 (206 worldwide citation)

The method for the active or automated control of the reservoir uses a reservoir model with available data such as seismic, log, and core data as inputs, and uses the reservoir model in conjunction with a reservoir simulation tool in order to determine a production strategy which will maximize certa ...

Tsutomu Yamate, Oliver C Mullins: Permanent optical sensor downhole fluid analysis systems. Schlumberger Technology Corporation, William B Batzer, David P Gordon, August 20, 2002: US06437326 (129 worldwide citation)

Systems for measuring the gas-oil ratio of fluid being produced in a wellbore are provided and generally include an uphole light source which produces a high amplitude near infrared signal at selected wavelengths, an uphole spectrometer, a processor coupled to the spectrometer for making GOR determi ...

Alberto Malinverno, Michael Prange: Uncertainty constrained subsurface modeling. Schlumberger Technology Corporation, William B Batzer, John J Ryberg, April 15, 2003: US06549854 (119 worldwide citation)

A method, apparatus, and article of manufacture are provided that use measurement data to create a model of a subsurface area. The method includes creating an initial parameterized model having an initial estimate of model parameter uncertainties; considering measurement data from the subsurface are ...

Bruce W Boyle, Raghu Madhavan, Jacques Jundt: Low-loss inductive couplers for use in wired pipe strings. Schlumberger Technology Corporation, John L Lee, William B Batzer, Dale Gaudier, March 15, 2005: US06866306 (95 worldwide citation)

A first flux-loop inductive coupler element electrically couples with a second flux-loop inductive coupler element. The first flux-loop inductive coupler element comprises a first ring-like core having high magnetic permeability and a conical-section annular first face transverse to the plane of the ...

Michael P Barrett, Stuart I Jardine, Michael C Sheppard: Downhole tool and method. Schlumberger Technology Corporation, William L Wang, William B Batzer, June 18, 2002: US06405798 (94 worldwide citation)

A downhole tool and apparatus is described for logging and/or remedial operations in a wellbore in a hydrocarbon reservoir. The tool comprises an autonomous unit (

Robert L Kleinberg: Magnetic resonance method for characterizing fluid samples withdrawn from subsurface formations. Schlumberger Technology Corporation, Eric W Kuo, William B Batzer, Mark Levy, February 12, 2002: US06346813 (82 worldwide citation)

Magnetic resonance techniques, e.g., nuclear magnetic resonance (NMR) and electron spin resonance (ESR), are used in a fluid sampling tool that extracts a fluid from subsurface earth formations into a flow channel within the tool. The magnetic resonance techniques involve applying a static magnetic ...

Min Yi Chen: Methods and apparatus for imaging earth formation with a current source, a current drain, and a matrix of voltage electrodes therebetween. Schlumberger Technology Corporation, William B Batzer, David P Gordon, February 20, 2001: US06191588 (78 worldwide citation)

The borehole imaging apparatus of the present invention includes a tool having an array of voltage electrode buttons mounted on a non-conductive pad. A current source and a current return are preferably located on the non-conductive pads at opposite ends thereof. The locations of the current source ...

Kenneth E Stephenson: Downhole power generation. Schlumberger Technology Corporation, William L Wang, William B Batzer, July 3, 2001: US06253847 (77 worldwide citation)

There is provided downhole power generation apparatus with a first electrode, a second electrode and an electrolyte, wherein the first electrode comprises a casing within a borehole. The first electrode and the second electrode are formed from dissimilar metals and by appropriate selection of the tw ...

William F Murphy, Andrew J Reischer, John J Orrange, Ian D Bryant, Allison M Fazio: Apparatus for creating, testing, and modifying geological subsurface models. Schlumberger Technology Corporation, William B Batzer, David Garrod, May 30, 2000: US06070125 (74 worldwide citation)

A computer-based apparatus for creating subsurface models having a graphical display device, a user input device, means for selecting a region of the world to be modeled; means for providing geophysical and geographical data corresponding to the selected region of the world; means for providing an a ...

Rogerio Tadeu Ramos, Bernard Elie Theron, Andrew J Reischer, William F Murphy, Ian David Bryant, David J Wilkinson: Separation of oil-well fluid mixtures. Schlumberger Technology Corporation, William L Wang, William B Batzer, John J Ryberg, April 13, 2004: US06719048 (72 worldwide citation)

A method and apparatus for the separation of the water from the oil/gas in the well itself, down-hole, in which gravity is allowed to work on the mixture in a non-vertical section of the well, and then, using separated flow paths, the gravity-separated components pumped to the surface or into a subt ...