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7328610 |
Method for measuring formation properties with a formation tester
A method is disclosed for estimating a formation pressure using a formation tester disposed in a wellbore penetrating a formation, said method comprising: (a) establishing fluid communication...
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7303009 |
Method to detect low salinity injection water encroachment into oil formations
This invention relates to the field of water flood monitoring in low saline water environment in a subterranean formation. In particular, the method of the invention relates to detecting the...
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7301852 |
Methods of generating directional low frequency acoustic signals and reflected signal detection enhancements for seismic while drilling applications
The present invention provides a method and apparatus for using an acoustic logging tool conveyed in a borehole in an earth formation for determining a characteristic of the formation. The method...
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7263880 |
Method for measuring formation properties with a time-limited formation test
An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a pretest piston positionable in fluid communication with the formation, and a...
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7187784 |
Borescope for drilled shaft inspection
Visual inspection of an interior surface of a borehole. A housing adapted to be lowered in the borehole supports a portable camera for generating images of a portion of the interior surface of the...
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7168310 |
Accuracy of shaly sand formation evaluation
A novel process and methodology in deterministic formation evaluation is provided. The formation evaluation results can accurately quantify formation attributes, such as clay-volume,...
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7117734 |
Method for measuring formation properties with a time-limited formation test
An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a probe and a pretest piston positionable in fluid communication with the...
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7117733 |
Dynamic logging speed
Data from a string of multiple formation evaluation data sensor are evaluated. Based on the analysis, the logging speed is increased if all the sensors justify it, and is reduced if any of the...
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7059180 |
Water cut rate of change analytic method
A method of measuring a water effect on an underground non-water well includes the steps of assembling a history of water cut (WC) measurements for the well over an extended period of time,...
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6879947 |
Method for optimizing the bit design for a well bore
A drill bit is designed to achieve optimum performance in a specified drilling application defined by the drilling system, the formation to be drilled and the configuration of the bore hole. A...
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6860147 |
Process for predicting porosity and permeability of a coal bed
A method for predicting the secondary porosity system (SPS) porosity, and thereby permeability, of a coal bed involves determining an initial condition in the coal bed, including an initial SPS...
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6843316 |
Method for improving well quality
A method of improving the quality of liquid coming from a well that has a pump and pipe assembly. The method includes identifying a region of the well that is low in contamination and a region of...
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6843119 |
Apparatus for measuring and recording data from boreholes
For collecting data from a water well, down-hole sensors are housed in modules. The modules are arranged to be screwed together in-line to form a vertical string. Mechanically, the modules are...
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6842400 |
Acoustic logging apparatus and method
The specification discloses a system and related method for determining characteristics of earth formations traversed by a borehole. An acoustic transmitter mounted on a tool, whether that tool is...
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6793025 |
Double emulsion based drilling fluids
A method of electrically logging subterranean wells using a conductive double emulsion fluid includes a miscible combination of an oleaginous fluid, an emulsifier capable of forming a...
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6651739 |
Medium frequency pseudo noise geological radar
System and methods are disclosed for transmitting and receiving electromagnetic pulses through a geological formation. A preferably programmable transmitter having an all-digital portion in a...
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6625566 |
Pressure drop calculation method and system taking account of thermal effects
The present invention relates to a method of calculating the pressure drops created by a given fluid in a circuit having a determined thermal profile. The method includes making up a database (BD)...
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6618675 |
Speed correction using cable tension
A well logging system is disclosed having an improved speed correction apparatus and method. One embodiment comprises a logging sonde, a wireline cable, a distance sensor, a tension sensor, and a...
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6584837 |
Method and apparatus for determining oriented density measurements including stand-off corrections
A logging-while-drilling density sensor includes a gamma ray source and at least two NaI detectors spaced apart from the source for determining measurements indicative of the formation density. A...
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6543280 |
Remote sensing and measurement of distances along a borehole
A borehole probe and related method and apparatus that enables information related to the depth of the probe to be determined and utilized by the probe to perform tasks. The probe, comparing its...
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6405809 |
Conductive medium for openhold logging and logging while drilling
A method of electrically logging subterranean wells using a conductive fluid includes a miscible combination of an oleaginous fluid, a polar organic solvent, an electrolytic salt, and a carbon...
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6351987 |
Fiber optic pressure sensor for DC pressure and temperature
A DC pressure and temperature sensor system for sensing and measuring the DC pressure and temperature of a production fluid (such as oil, gas and water mixtures) in tubing, such as tubing used to...
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6349595 |
Method for optimizing drill bit design parameters
A method for selecting a drilling parameter is disclosed. The method includes determining a loading displacement relationship for samples of earth formations. The loading displacement measurements...
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6308561 |
Well logging apparatus
A well logging device of compact reduced diameter compared to the prior art, such well logging device having both short spaced and long spaced types of gamma ray crystal detectors installed in a...
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6295867 |
Geological sample sub
A sturdy tubular "sub" apparatus for collecting geological samples (Geological Sample-Sub or GSS) that may be entrained within a conventional drill string apparatus for conducting a...
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6263730 |
Downhole pump strainer data recording device and method
A device for sensing and recording downhole data relating to an ambient environment in a production well and a method for obtaining such downhole data utilizing the device. Further, the device is...
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6250138 |
Determining fluid bubble point pressure using an adjustable choke
A method of determining the real time bubble point pressure of a fluid originating from a subsurface earth formation using an adjustable choke positioned downhole adjacent to the formation. The...
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6164126 |
Earth formation pressure measurement with penetrating probe
The present invention relates to an apparatus and method for measuring a property of a subsurface formation intersected by a wellbore, which contemplate the use of a tool body adapted for movement...
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6011557 |
Method for obtaining a representation of a geological structure
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5959203 |
Method for automatic identification of the nature of a hydrocarbon production well
The present invention proposes a method for automatic identification of the nature of a hydrocarbon production well, the nature of the associated reservoir and possible limits of this reservoir. It...
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5900545 |
Strain monitoring system
A apparatus is provided for detecting deformation in solids in deep holes having a resilient vessel pre-stressed into a rock formation. The vessel is filled with fluid and is sealed except for an...
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5899958 |
Logging while drilling borehole imaging and dipmeter device
A LWD tool is disclosed for providing an image of the borehole during drilling or during removal of the tool from the borehole. The tool includes imaging transducers which are fired based upon...
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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...
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5784004 |
Apparatuses and systems for reducing power consumption in remote sensing applications
The system of the subject invention includes an antenna system, a surface apparatus and a battery-powered remote apparatus useful for applications such as well bore telemetry. In well bore...
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5753813 |
Apparatus and method for monitoring formation compaction with improved accuracy
Method and an apparatus for determining a vertical distance between a first marker and a second marker embedded in a formation traversed by a borehole so as to quantify the occurrence of earth...
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5731550 |
Acoustic dipole well logging instrument
A dipole acoustic well logging instrument including an acoustic transmitter. Receiver sections are disposed at axially spaced apart locations from the acoustic transmitter. Each receiver section...
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5699246 |
Method to estimate a corrected response of a measurement apparatus relative to a set of known responses and observed measurements
The present invention provides a new method to determine corrected characteristics of materials using the measured quantities obtained by a measurement and an extensive set of database points...
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5689068 |
Determination of the porosity and permeability of a geological formation from an electrofiltering phenomenon
The porosity and permeability of a geological formation (2) are determined on the basis of an electrofiltering phenomenon by exploiting the existence of non-linear electrofiltering phenomena. One...
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5675088 |
Method and apparatus for automatic monitoring of tectonic stresses and quantitative forecast of shallow earthquakes
An apparatus for measuring in situ stresses surrounding an active earthquake fault and forecasting shallow earthquakes includes a network of monitoring stations, each operating a respective...
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5659135 |
Method for modeling a stratified and fractured geologic environment
An improved method for modeling a stratified and fractured geological environment is disclosed. The method produces a geometric model of a multi-layered fractured sedimentary medium by performing...
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5648603 |
Method and apparatus for stabilizing a quantitative measurement gas trap used in a drilling operation
Methods and apparatus for improving the quantitative measurement and detection of gas entrapped in drilling fluid during a drilling operation are disclosed. A sealed gas sampler is provided for...
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5646342 |
Method of Locating Hydrocarbon reserves
A method of locating hydrocarbon reserves comprising: selecting on the basis of a hydrocarbon hypothesis from a region of interest below the surface of the earth patches having probabilities of...
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5579248 |
Method for removing borehole rugosity noise from well log data
A method for eliminating sinusoidal noise without affecting the response of the formation means that the actual formation responses of the logging tools are recovered, and the logs can be used...
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5574218 |
Determining the length and azimuth of fractures in earth formations
A method for determining the approximately length and the azimuth of a hydraulic fracture after it has been formed in a subterranean formation without requiring the use of dedicated monitor wells...
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5565624 |
Method of determining variations in the morphology of a borehole
Method of determining variations in the morphology of a borehole. It consists in measuring, as a function of the depth of the borehole, the dip and the azimuth (a 1 ) of the borehole, the inside...
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5563512 |
Well logging apparatus having a removable sleeve for sealing and protecting multiple antenna arrays
A well logging apparatus is disclosed having an elongate body supporting a plurality of antenna coils housed in recesses formed on the body. A sleeve covers the segment of the body containing the...
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5561245 |
Method for determining flow regime in multiphase fluid flow in a wellbore
The invention is a method of determining the flow regime of fluid having more than one phase flowing in a conduit. The method includes the step of positioning a sensor in the conduit, the sensor...
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5551287 |
Method of monitoring fluids entering a wellbore
In a borehole logging tool, a hot wire or hot film anemometer measures fluid flow entering or exiting the borehole at the wall of the borehole. The logging tool has open sensing pads mounted on the...
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5531112 |
Fluid holdup tool for deviated wells
A production logging tool is provided for use within a well to determine fluid holdup of a multiphase fluid flow within the well. The production logging tool includes a plurality of sensors secured...
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5528556 |
Combination well logging device
The invention concern a combination well logging device adapted to be moved inside a borehole to measure the properties of geological formations through which the borehole passes. The device...
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