Ohm, Inc.

Other

Balboa Instruments, Inc.

Rock Solid Images, Inc.

Bilboa Instruments, Inc.

Siege Industries, Inc.

Michael E Tompkins

Michael J Green

Lucy MacGregor

David Andreis

Lucy M Macgregor

A method of analyzing electromagnetic survey data from an area of seafloor () that is thought or known to contain a conductive or resistive body, such as a subterranean hydrocarbon reservoir (), is described. The method includes providing electric field data and magnetic field data, for example magnetic flux density, obtained by at least one receiver () from a horizontal electric dipole (HED) transmitter () and determining a vertical gradient in the electric field data. The vertical gradient in the electric field data and the magnetic field data are then combined to generate combined response data. The combined response data is compared with background data specific to the area being surveyed to obtain difference data sensitive to the presence of a subterranean hydrocarbon reservoir. Because the combined response data are relatively insensitive to the transverse electric (TE) mode component of the transmitted signal, the method allows hydrocarbon reservoirs to be detected in shallow water where the TE mode component interacting with the air would otherwise dominate. Furthermore, because there is no mixing between the TE and transverse magnetic (TM) modes in the combined response data, data from all possible transmitter and receiver orientations may be used. The background data may be provided by magneto-telluric surveying, controlled source electromagnetic surveying or from direct geophysical measurement.

Electromagnetic surveying for resistive or conductive bodies

A method of analyzing results from an underwater controlled source electromagnetic (CSEM) survey of an area that is thought or known to contain a subterranean hydrocarbon reservoir is described. The method is based on a wavefield extrapolation of narrow-band electromagnetic field data obtained from pairs of source and receiver locations. The data comprise a plurality of discrete frequencies between 0.01 Hz and 60 Hz. The wavefield extrapolation is performed for each of these discrete frequencies to provide distributions of electromagnetic scattering coefficient as a function of position and depth beneath the survey area. These distributions may then be combined to provide a displayable image of electromagnetic scattering coefficient. The method is able to quickly provide a displayable image that is readily interpretable.

Electromagnetic surveying for hydrocarbon reservoirs

An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, and the heating element of the spa system can be activated at the proper time to raise the temperature of the water to a selected temperature by a desired time. The spa system also monitors information which might show errors in the operation of the spa system such as a blockage in the flow of water over the heating element in the spa system.

Spa control system

An improved spa control system is disclosed. The improvements may be made individually or in conjunction with any combination of all of the other improvements of the present invention. The invention describes a spa control system which calculates the rate of heating of the heater of the water in the spa to control the operation of the heating element. The system uses a interconnection panel to link a control panel to the power supply and to the operative components of the system. The unique connection of the control panel to the interconnection panel permits the control panel to be located adjacent to the spa.

Microcomputer SPA control system

A spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, and the heating element of the spa system can be activated at the proper time to raise the temperature of the water to a selected temperature by a desired time. The spa system also monitors information which might show errors in the operation of the spa system such as a blockage in the flow of water over the heating element in the spa system.

Growing community of inventors

Houston, TX, United States of America

Michael E Tompkins