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7581440 |
Apparatus and methods to perform downhole measurements associated with subterranean formation evaluation
A system for testing a subterranean formation penetrated by a well includes a downhole tool configured to be coupled to a work string that includes a tool body having a longitudinal bore for...
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7568521 |
Wellbore formation evaluation system and method
A formation evaluation tool positionable in a wellbore penetrating a subterranean formation is provided. The formation evaluation tool includes a cooling system adapted to pass a cooling fluid...
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7565835 |
Method and apparatus for balanced pressure sampling
A method of sampling fluid from a rock formation penetrated by a borehole includes positioning a downhole tool having a flow line in the borehole, establishing an inlet port through which fluid...
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7416023 |
Formation pressure testing apparatus with flexible member and method of formation pressure testing
An apparatus and method for use in determining pressure at a formation of interest in-situ. A carrier carrying a tool is conveyed in a borehole. The tool includes a sealing member and a port...
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7395703 |
Formation testing apparatus and method for smooth draw down
A method and apparatus for of determining a formation parameter of interest. The method includes placing a tool into communication with the formation to test the formation and drawing down a test...
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7380599 |
Apparatus and method for characterizing a reservoir
An apparatus and method for characterizing a subsurface formation is provided. The apparatus includes a tool body, a probe assembly carried by the tool body for sealing off a region of the borehole...
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7363972 |
Method and apparatus for well testing
A method for testing petroleum or water wells. A tool is secured to a tubing and run into the well and to the reservoir zone to be explored. An upper and a lower seal isolate the reservoir zone. A...
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7317989 |
Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data
The present invention provides a chemometric equation to estimate fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can...
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7260985 |
Formation tester tool assembly and methods of use
A downhole, extendable testing apparatus and methods of use are described and claimed herein. In one embodiment, an extendable sample device is connected to a draw down piston assembly. A position...
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7243536 |
Formation fluid sampling apparatus and method
A sample module is provided for use in a downhole tool to obtain fluid from a subsurface formation penetrated by a wellbore. The sample module includes a sample chamber carried by the module for...
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7222524 |
Method and apparatus for determining an optimal pumping rate based on a downhole dew point pressure determination
The present invention provides a down hole spectrometer for determination of dew point pressure to determine an associated optimal pumping rate during sampling to avoid precipitation of asphaltenes...
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7222671 |
Apparatus and method for formation evaluation
A viscometer for a down hole tool positionable in a well bore penetrating a subterranean formation is described. The formation contains at least one fluid therein. The down hole tool is adapted to...
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7194902 |
Apparatus and method for formation evaluation
A viscometer-densimeter for a down hole tool positionable in a well bore penetrating a subterranean formation is described. The formation contains at least one fluid therein. The down hole tool is...
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7195063 |
Downhole sampling apparatus and method for using same
A method and apparatus for sampling formation fluid includes drawing formation fluid from the subterranean formation into the downhole tool and collecting the formation fluid in a sample chamber....
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7162918 |
Method and apparatus for downhole fluid characterization using flexural mechanical resonators
The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the...
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7155967 |
Formation testing apparatus and method
A method and apparatus for testing formations surrounding an earth borehole. The method includes the following steps: providing a tool movable through the borehole; providing a flow line in the...
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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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7090012 |
Method and apparatus for subsurface fluid sampling
The apparatuses and methods herein relate to techniques for extracting fluid from a subsurface formation. A downhole sampling tool is provided with a probe having an internal wall capable of...
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7037724 |
Method for storing and transporting crude oil
Disclosed is a method for transporting blended crude oils comprising the steps of; (a) admixing a first crude oil with a second, different crude oil to form a crude oil admixture; (b) determining a...
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6966234 |
Real-time monitoring and control of reservoir fluid sample capture
A method of sampling reservoir fluid includes establishing communication between a reservoir and an entry port of a flow line disposed in a borehole penetrating the reservoir. The method includes...
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6941804 |
Determining the PVT properties of a hydrocarbon reservoir fluid
A method of determining an in situ PVT property of a hydrocarbon reservoir fluid that is present in a hydrocarbon-bearing formation layer traversed by a borehole, which method involves the steps...
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6837314 |
Sub apparatus with exchangeable modules and associated method
The present invention is an apparatus and method for use in a well borehole drilled into a formation. The apparatus comprises a work string disposed in the borehole. The work string includes at...
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6786086 |
Determining the in situ effective mobility and the effective permeabilty of a formation
A method for determining the in-situ effective mobility of hydrocarbons in a formation layer, in which a formation test tool, having a fluid analyzer, induces sample fluid to flow from the...
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6758090 |
Method and apparatus for the detection of bubble point pressure
The present invention discloses a method and apparatus to detect bubbles in a fluid sample to determine if gases are present, wherein an ultrasonic source is used and its properties monitored....
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6745835 |
Method and apparatus for pressure controlled downhole sampling
A method for sampling a subsurface formation includes positioning a formation testing tool in a borehole having borehole fluid with a pressure less than formation pressure such that a pressure...
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6672386 |
Method for in-situ analysis of formation parameters
A method of performing a formation rate analysis from pressure and formation flow rate data. Pressure and flow rate data are measured as fluid is withdrawn from a formation. Variable system volume...
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6467340 |
Asphaltenes monitoring and control system
The present invention provides a system that monitors and controls the precipitation of asphaltenes in a formation fluid recovered from a subsurface formation or reservoir by using a sensor to make...
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6343507 |
Method to improve the quality of a formation fluid sample
The present invention provides a method for improving the quality of a formation fluid sample by taking the sample at a time when the formation fluid composition contains the most favorable portion...
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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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6058773 |
Apparatus and method for sampling formation fluids above the bubble point in a low permeability, high pressure formation
A flow-control apparatus enables the taking of representative formation samples at sampling rates less than 10 cc/sec in typical high pressure wells, e.g., to 20,000 psi. Throttle valves are used...
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6058772 |
Sampling device
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5803186 |
Formation isolation and testing apparatus and method
An apparatus and method are disclosed for obtaining samples of pristine formation fluid, using a work string designed for performing other downhole work such as drilling, workover operations, or...
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5775424 |
Depth-discrete sampling port
A sampling port is provided which has threaded ends for incorporating the port into a length of subsurface pipe. The port defines an internal receptacle which is in communication with subsurface...
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5703286 |
Method of formation testing
A new technique for interpreting pressure data measured during a formation test. The new technique uses an exact spherical flow model that considers the effects of flow line storage and that can be...
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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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5663499 |
Method for estimating permeability from multi-array induction logs
An improved method of estimating formation permeability is provided. Essentially, the improved method of the present invention combines a mud cake build-up/invasion model and a fully implicit...
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5587525 |
Formation fluid flow rate determination method and apparatus for electric wireline formation testing tools
A method of determining the volume of a fluid sample withdrawn from an earth formation penetrated by a wellbore is disclosed. The method includes the step of positioning a formation testing tool...
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5497658 |
Method for fracturing a formation to control sand production
A method for determining the minimum length for a fracture in a fluid-producing formation to control the production of sand therefrom wherein a plurality of critical drawdown pressures are...
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5416024 |
Obtaining collective fluid inclusion volatiles for inclusion composition mapping of earth's subsurface
A collective fluid inclusions volatiles sample is released from each of a plurality of sedimentary rock samples and analyzed as it is being released to determine composition thereof. Compositions...
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5361631 |
Apparatus and methods for determining the shear stress required for removing drilling fluid deposits
Improved apparatus and methods for determining the shear stress required for removing drilling fluid deposits formed on the walls of a well bore are provided. The methods basically comprise...
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5341100 |
Electromagnetic wave method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing
There is disclosed in the present specification a method and apparatus for use of a downhole formation multi-tester instrument in the characterization of formation fluids, including measurement of...
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5138877 |
Method and apparatus for intersecting a blowout well from a relief well
A method and apparatus for determining the horizontal pressure gradient of n earth formation penetrated by a borehole. This is done by: (a) establishing, through the wall of the borehole and...
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5095745 |
Method and apparatus for testing subsurface formations
A method and apparatus for testing subsurface formations, particularly a formation having a permeability less than about 10 millidarcies is disclosed. The test is made by use of a down hole test...
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5079948 |
Method for conducting capillary pressure drainage and imbibition on a core sample of a porous rock
A water-saturated core sample of a porous rock is placed in a sleeve which a hydrophobic membrane in one end and a hydrophilic membrane in a second end. A pressurized hydrocarbon is injected into...
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5065619 |
Method for testing a cased hole formation
A method for fluid pressure testing of a formation behind casing is set forth. A formation testing tool is lowered into the well to a specified depth opposite a formation of interest behind a...
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4941350 |
Method and apparatus for formation testing
Apparatus and method are disclosed for testing and sampling fluid in an oblong borehole of fracture zones in the area maximum permeability for more efficient recovery and testing in a given...
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4893505 |
Subsurface formation testing apparatus
Apparatus for collecting a plurality of samples of fluids in earth formations traversed by a wellbore includes a pressure sensor for deriving a pressure measurement and a temperature sensor for...
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4884439 |
Hydraulic circuit use in wireline formation tester
A formation tester is set forth. It incorporates a probe having a surrounding elastomeric seal and snorkel for extension into formations. The probe connects with a sample line into the formation...
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4843878 |
Method and apparatus for instantaneously indicating permeability and horner plot slope relating to formation testing
For use in a formation testing tool adapted to be lowered into a borehole on a logging cable, apparatus is set forth which conducts formation measurements including extension of a snorkel into a...
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4739654 |
Method and apparatus for downhole chromatography
Method and apparatus for downhole chromatography. A tool housing includes a chromatograph and a formation tester for extracting a fluid sample from a formation adjacent the wall of an uncased well...
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