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WO/2000/038956A1 |
An electric field sensor comprises (100) at least one electrode (103) mountable in a vehicle seat (3) and a sensing circuit (106) operatively coupled to the electrode (103), wherein the at least one electrode (103) at least partially bou...
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WO/2000/039612A1 |
The total porosity the formation, (13), including a fractional volume of the shale (13), and a resistivity of the shale are determined (22), in a laminated reservoir including sands that may have dispersed shales therein. A tensor petrop...
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WO/2000/038959A1 |
An occupant detection system (10) comprises an electric field sensor (100) in the seat bottom (42) of a vehicle seat (3) for discriminating objects on the seat (3), and a seat weight sensor (200) for sensing the force upon the seat (3). ...
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WO/2000/033108A1 |
A system and method for safely and economically providing up to 1800 watts to downhole equipment is shown in the figure. In one embodiment, the system uses a standard multiconductor logging cable (20) which supports orthogonal signal tra...
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WO/2000/030013A1 |
A method for correcting data measured by a well logging instrument (3) for effects of cable (2) yo-yo. The data are first preprocessed to reduce magnitude of spatial frequency components in the data occurring within a bandwidth of axial ...
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WO1999062204A9 |
The invention is an acoustic transmitter (301, 401) that imparts vibratory stresses onto a signal propagation medium such as oil well tubing when actuated by an electric driver. In one embodiment, the acoustic transmitter (301, 401) util...
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WO/2000/022456A1 |
The invention concerns a method for detecting fractures in logging signals made up of logs of different types (1 to 6) which consists in: selecting a portion of each of said logs (1 to 6) such that all the selected portions have one sing...
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WO/2000/003270A1 |
A borehole seismic shuttle tool includes a tool body (200) having a cavity (234) with an opening in the wall of the tool body and anchoring arm (220) attached to the tool body and operable to anchor the tool body to the borehole wall (25...
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WO1999052048B1 |
A simulation system is responsive to a plurality of sets of input data (95, 97) for simulating an earth formation located in the vicinity of an oilfield reservoir, generating a set of simulation results (48) in response to the simulation...
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WO/1999/056152A1 |
The present invention relates to geophysical prospecting methods and may be used in conventional programs of geological prospecting operations for searching, prospecting and studying oil and gas fields, mainly in areas where the structur...
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WO/1999/056153A1 |
An improved method for eliminating reflections from artificial model boundaries encountered in finite-difference (20) acoustic wave propagation computations is based on applying two different boundary conditions at the artificial boundar...
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WO/1999/053342A1 |
A method, computer system and computer program for analyzing geological data sampled from a subsurface region stored in a geoscience model on a computer-readable media including enforcing consistency within the geoscience model. A method...
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WO/1999/046615A1 |
A clamped receiver array (100) using coiled tubing conveyed packer elements is disclosed and described. The receiver array (100) is adapted to be received within a borehole (4) and is therefore particularly useful for borehole seismology...
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WO/1999/040532A1 |
A process is disclosed for predicting a characteristic of a fluid-containing physical system such as a reservoir. The physical system is discretized to a plurality of gridcells. For each gridcell, nonlinear governing equations are constr...
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WO/1999/038032A1 |
A system and method for signal processing are disclosed. One problem in measurement-while-drilling systems including a downhole acoustic transmitter (140) is the presence of uphole generated noise and reflected signals (180, 190). By pro...
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WO/1999/036802A1 |
A communication system between remote locations connected by a common wire conductor where AC power (40) is supplied from one location to one or more remote locations (32, 34). At the remote locations, inductor coil components (28, 32 an...
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WO/1999/037009A1 |
A system for providing large quantities of power at a selected voltage to a downhole well tool. A conductor (14) extends between a surface regulator (16) and the well tool (10). The voltage is continuously measured downhole at the well t...
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WO/1999/028767A1 |
The present invention relates to method(s)/apparatus for creating, testing, and modifying computerized models of the earth's subsurface by, for example, providing computer-implemented tools which allow user(s) to selectively access and d...
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WO/1999/023355A1 |
Lenghts of coiled tubing (10) have sensor carrier elements (12) mounted therebetween, such a plurality of sensor carrier elements (12) are positioned along a length of coiled tubing (10). Each sensor carrier element (12) carries a sensor...
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WO/1999/021148A1 |
An integrated walk-through system (10) for detecting concealed or suspicious objects includes a portal (12) in which a person (8) may walk through without interruption; a device (15) responsive to a person's entry into the portal for gen...
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WO/1999/002819A1 |
Methods and apparatus are disclosed for controlling and monitoring injection zone and production zone parameters in order to control the injected fluid front to avoid breakthrough of the injected fluid to the production zone and thus opt...
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WO/1998/057030A1 |
A control and monitoring system for chemical system for chemical treatment of an oilfield well is presented. In accordance with the present invention, a chemical injection monitoring and control system includes the placement of one or mo...
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WO/1998/057198A1 |
The invention concerns a method for characterising the coherence of an environment characteristic measurements, consisting in: taking N types of reference measurements in each observation (X�i?) of a reference set; constituting at leas...
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WO/1998/054600A1 |
Sounds are generated in a pipe (20) using an audio speaker (3) connected to a standpipe (7) connected to the underground pipe (20) or in some other way. Those sounds propagate down the pipe and are detected remotely from the audio speake...
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WO/1998/053173A2 |
A logging system in which information relating to physical attributes of underground strata is recorded using pictorial representations. A library of representations (35) to which further representations may be added in the field is incl...
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WO/1998/050681A1 |
This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensor is deployed downhole to provide information about downhole conditions. Parameters related to t...
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WO/1998/050680A2 |
The present invention provides systems utilizing fiber optics for monitoring downhole parameters and the operation and conditions of downhole tools. In one system fiber optics sensors are placed in the wellbore to make distributed measur...
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WO/1998/049581A1 |
An improved technique to more accurately calculate pore pressure of sedimentary rock due to subsurface fluid expansion. The technique is built upon a combinations of known force balanced $i(in situ) loading limb mineralogical stress/stra...
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WO/1998/041885A1 |
On the transmitting side, a piezoelectric device (34) is so provided that the transmission direction is vertical to the wall of an exploration well (12). An anvil (42) provided on the exploration hole wall side of the piezoelectric devic...
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WO/1998/034190A1 |
A method and apparatus for predicting distribution of reservoir permeability or porosity and pseudo relative permeability using well data (80) and 3-D seismic data (80) are disclosed, where a preferred first step (82) in the method model...
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WO/1998/028638A1 |
The present invention relates to a method for detecting the migration paths of petroleum products in the ground. This method may also be used to perform electrical prospection in the lower layers of the ground and, when determining struc...
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WO/1998/027444A2 |
A method, computer system, and computer program for analyzing geological data sampled from a subsurface region and an analysis of the geological data stored in a geoscience model on a magnetic media, including building a simulation input...
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WO/1997/034169A1 |
A method of locating a mineral deposit, the method comprising the steps of: (i) obtaining a plurality of data sets of indicators of physical or chemical conditions at a plurality of sites in an area known to contain the mineral, at least...
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WO/1997/028466A1 |
For various reasons it may be desirable to change the way a sonde is programmed to behave and respond to the data it receives and operates on, and at present each time this must be done it has been necessary to lift the sonde out of the ...
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WO/1997/026562A1 |
A system and method for evaluating a geological formation is described which compares actual wireline log measurements from a number of wireline logging tools to predicted tool response logs. The system and method uses a forward model of...
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WO/1996/025021A1 |
An occupancy sensor that provides improved performance by the inclusion of a microprocessor that controls the sensing transducers and processes the received signal to optimize desired detection performance. The occupancy sensor includes ...
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WO/1996/021165A1 |
To provide long-term regular monitoring of an underground area, a stationary seismic transceiver device is positioned at the production site so that stable operating conditions are maintained at all times, i.e. constant transmission/rece...
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WO/1996/001408A1 |
Seismic anchor (10) of plastic material, comprising a shaft (1) which is provided at the lower end (3) with an attaching means for an explosive charge (16) with detonator (15), wherein a plurality of arms (5) are integrally formed with t...
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WO/1995/028659A1 |
A method and equipment for detecting liquids such as hydrocarbons and water underground and which can detect the water table, in which a seismic shock is initiated on the surface and electrodes, placed on either side and close to the poi...
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WO/1995/006886A1 |
A method for translating seismic time data via seismic depth data to seismic depth/lithology data, enabling advantageous reduced-risk location of hydrocarbons. Reducing dry hole risk is accomplished by introducing a new work domain which...
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WO/1995/004290A1 |
An apparatus (2) and method is provided whereby a small diameter, single conductor wire-line (22) is combined with standard slick-line equipment to obtain "real-time" surface display of borehole logging data from well-logging tools attac...
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WO/1994/009384A1 |
A method of monitoring short-term and long-term deformation changes in a geological space and predicting geodynamic events, such as earthquakes, landslides, dilatations and subsidence events, in a region, said method comprising the steps...
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WO/1993/012443A1 |
The monitoring of an underground effluent deposit (2) and its exploration are conducted by installing different user modules or apparatuses: reception assemblies (Ri, Rj, Rk) such as geophones or hydrophones, state sensors (C1, C2), tool...
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WO/1993/005600A1 |
The present invention relates to a communications protocol for a digital telemetry system which enables more efficient digital data transmission between a plurality of digital communications nodes. The protocol is implemented using uplin...
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WO/1992/016859A1 |
The invention describes new methods of operation of an apparatus having at least two pairs (pair C-D and pair D-E) of voltage measurement electrodes vertically disposed in a cased well (6) to measure the resistivity of adjacent geologica...
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WO/1991/002269A1 |
The invention relates to the principle of a probe to improve the quality of imaging logs in excavations providing especially a good coverage of the wall (2) of the excavation by the beam of detectors (4) or electrodes. The basic componen...
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WO/1988/005108A1 |
Probe and its anchoring device in a well, said probe having an axis which has to be parallel to the well axis and comprising a probe body supporting said device, which device is provided with anchoring arms. Substantially at a same level...
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WO/1988/003657A1 |
An apparatus and method for measuring electrochemical phenomena of formations adjacent a cased well borehole. An alternating current is introduced into the casing (4) in the proximity of the formations to be tested. A portion of the curr...
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WO/1987/005707A1 |
A downhole seismic source (20) capable of generating seismic forces in excess of 1000 newtons. The source produces seismic waves for seismic applications, particularly cross borehole measurements and vertical seismic profiling. Coupled w...
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WO/1987/005708A1 |
A nondestructive downhole seismic source (10) capable of generating SV-waves, SH-waves, and P-waves alone or in combination to determine information about a surrounding geologic formation. The invention also includes processes of perform...
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