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| Number | Title | Issue Date |
| 7255166 | Imbibition well stimulation via neural network design A method for stimulation of hydrocarbon production via imbibition by utilization of surfactants. The method includes use of fuzzy logic and neural network architecture constructs to determine surfactant use. ... | 08/14/2007 |
| 6789620 | Downhole sensing and flow control utilizing neural networks Methods are provided for downhole sensing and flow control utilizing neural networks. In a described embodiment, a temporary sensor is positioned downhole with a permanent sensor. Outputs of the temporary and permanent sensors are recorded as training data sets. A n... | 09/14/2004 |
| 6629086 | Method for interpreting petroleum characteristics of geological sediments The invention relates to a method for automatic interpretation of geochemical measurements obtained by pyrolysis of a rock sample in order to obtain information pertaining to the organic matter contained in the sample. In this method, rock samples having ... | 09/30/2003 |
| 6246974 | Method of determining characteristics of a rotary drag-type drill bit A method of determining characteristics of a rotary drag-type drill bit comprises the steps of: creating a computerized representation of the cutters on the drill bit, and then, with each cutter in turn, projecting the shape of the cutter onto a fixed pla... | 06/12/2001 |
| 6236942 | System and method for delineating spatially dependent objects, such as hydrocarbon accumulations from seismic data A neural network based system, method, and process for the automated delineation of spatially dependent objects is disclosed. The method is applicable to objects such as hydrocarbon accumulations, aeromagnetic profiles, astronomical clusters, weather clus... | 05/22/2001 |
| 6226601 | Seismic survey system A wireless seismic survey system is structured as a hierarchy of cell network layers, each higher level cell network layer covering a bigger area than a lower level cell network layer and receiving data from the lower level cell network layer. This hierar... | 05/01/2001 |
| 6044325 | Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrument A method for generating an improved estimate of horizontal conductivity, dip angle, azimuth and anisotropy parameter of an earth formation penetrated by a wellbore from dual-frequency transverse electromagnetic induction measurements, comprising generatin... | 03/28/2000 |
| 6002985 | Method of controlling development of an oil or gas reservoir A method controlling development of an oil or gas reservoir uses a neural network and genetic algorithm program to define a neural network topology and the optimal inputs for that topology. The topology is defined from identified and selected (1) paramete... | 12/14/1999 |
| 5940777 | Automatic seismic pattern recognition method An automatic seismic pattern recognition method includes the steps of: determining a given number of seismic patterns to be recognized; providing a set of seismic trace portions for the region; defining a pattern recognition parameter common to all the tr... | 08/17/1999 |
| 5828981 | Generating pore types and synthetic capillary pressure curves from wireline logs using neural networks Methods of directly analyzing wireline well logging data to derive pore types, pore volumes and capillary pressure curves from the wireline logs are disclosed. A trained and validated neural network is applied to wireline log data on porosity, bulk densit... | 10/27/1998 |
| 5745384 | System and method for detecting a signal in a noisy environment A system and method are disclosed for detecting an event-related signal among noise, where the system includes memory for storing measurement values and may include a processor for generating residual values associated with the measurement values, and for... | 04/28/1998 |
| 5617513 | Method for analyzing activity in a signal A method for analyzing a signal. The signal is passed through a noise filter to generate a filtered signal. The filtered signal is passed through an adaptive pattern recognition unit. At the adaptive pattern recognition unit, a pattern that is a function ... | 04/01/1997 |
| 5536938 | Pulsed neutron decay logging A borehole logging tool having a pair of spaced-apart detectors records intensity signals representing the die-away of nuclear radiation in a subsurface formation. Weighted moments of the intensity signals as well as of a model are produced. Corresponding... | 07/16/1996 |
| 5490062 | Real-time neural network earthquake profile predictor A neural network has been developed that uses first-arrival energy to predict the characteristics of impending earthquake seismograph signals. The propagation of ground motion energy through the earth is a highly nonlinear function. This is due to differe... | 02/06/1996 |
| 5424959 | Interpretation of fluorescence fingerprints of crude oils and other hydrocarbon mixtures using neural networks An artificial intelligence system is used with a conglomeration of fluorescence data to provide a method of improving recognition of an unknown from its spectral pattern. Customized neural network systems allow the ultimate organization and resourceful us... | 06/13/1995 |
| 5345077 | Method and apparatus for producing a porosity log of a subsurface formation corrected for detector standoff A borehole logging tool is lowered into a borehole traversing a subsurface formation and a neutron detector measures the die-away of nuclear radiation in the formation. A model of the die-away of nuclear radiation is produced using exponential terms varyi... | 09/06/1994 |
| 5300770 | Apparatus for producing a porosity log of a subsurface formation corrected for detector standoff A borehole logging tool is lowered into a borehole traversing a subsurface formation and a neutron detector measures the die-away of nuclear radiation in the formation. Intensity signals are produced representing the die-away of nuclear radiation as the l... | 04/05/1994 |
| 5181171 | Adaptive network for automated first break picking of seismic refraction events and method of operating the same An adaptive, or neural, network and a method of operating the same is disclosed which is particularly adapted for performing first break analysis for seismic shot records. The adaptive network is first trained according to the generalized delta rule. The ... | 01/19/1993 |
| 4939648 | Apparatus and method for monitoring well logging information A method and apparatus monitors well logging information obtained from a logging apparatus moveable in an earth borehole. In a disclosed embodiment, observers are established for determining the presence of specified characteristics of the logging informa... | 07/03/1990 |
| 4791618 | Well logging method and system for detecting structural and stratigraphic geological make-up of subsurface formations Disclosed are a well logging process and a well logging system using dipmeter and other logs to find subsurface faults and unconformities and automatically produce therefrom, and with user interaction, a subsurface map of the structural and depositional e... | 12/13/1988 |
| 4713775 | Intelligent assistant for using and operating computer system capabilities to solve problems To help a user program a computer target system to solve problems, the computer system is provided with predefined capabilities and the user is provided with a knowledge system that includes knowledge about applying the capabilities to effectively and eff... | 12/15/1987 |
| 4646240 | Method and apparatus for determining geological facies In a method and apparatus for obtaining a recording of facies of geological formations, logging instruments are moved in a borehole to produce log measurements at successive levels of the borehole. With each level is associated a reference sample whose co... | 02/24/1987 |