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7347260 |
Method for determining tracer concentration in oil and gas production fluids
A method for determining the extent of recovery of materials injected or otherwise introduced into oil wells or subsurface formations is practiced using a portable device. The portable device can...
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7178590 |
Well fluids and methods of use in subterranean formations
Improved well fluids that include hollow particles, and methods of using such improved well fluids in subterranean cementing operations are provided. Also provided are methods of cementing, methods...
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7137446 |
Fluids comprising reflective particles and methods of using the same to determine the size of a wellbore annulus
In embodiments, methods of determining a size of an annulus in a wellbore include: (a) displacing a fluid comprising reflective particles downhole and up through the annulus, wherein the reflective...
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7096944 |
Well fluids and methods of use in subterranean formations
The present invention relates to improved well fluids that include hollow particles, and to methods of using such improved well fluids in subterranean cementing operations. The present invention...
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7077198 |
In situ recovery from a hydrocarbon containing formation using barriers
A method is described for inhibiting migration of fluids into and/or out of a treatment area undergoing an in situ conversion process. Barriers in the formation proximate a treatment area may be...
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7073581 |
Electroconductive proppant compositions and related methods
Some embodiments provide methods of obtaining data from a portion of a subterranean formation comprising providing proppant particulates wherein at least a portion of the proppant particulates are...
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7066256 |
Apparatus and method of detecting interfaces between well fluids
An apparatus for use in circulating cement in a casing in a wellbore is described having a first component such as a sensor disposed on the casing and a second component such as a detectable device...
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7032662 |
Method for determining the extent of recovery of materials injected into oil wells or subsurface formations during oil and gas exploration and production
Disclosed is a method of determining the extent of recovery of materials injected into oil wells or subsurface formations. The method includes injection of one or more tracers into an oil well or...
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7032660 |
In situ thermal processing and inhibiting migration of fluids into or out of an in situ oil shale formation
An oil shale formation may be treated using an in situ thermal process. Fluid migration into and/or out of a treatment area in the formation may be inhibited. In some embodiments, a barrier may be...
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7028773 |
Assessing downhole WBM-contaminated connate water
Water-based mud filtrate concentration in a downhole fluid sample drawn from the borehole of an oil well is assessed. To measure water-based mud filtrate concentration, a water-based mud having a...
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6915848 |
Universal downhole tool control apparatus and methods
A method and apparatus for internal data conveyance within a well from the surface to a downhole tool or apparatus and for returning downhole tool data to the surface, without necessitating the...
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6877559 |
Retrieving a sample of formation fluid in as cased hole
A method for retrieving a formation fluid sample through a cased borehole utilizing a sampling tool. Sampling tool straddle packers are set about a first set of perforations and annular fluid is...
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6840316 |
Tracker injection in a production well
A petroleum well having a well casing, a production tubing, a source of time-varying current, a downhole tracer injection device, and a downhole induction choke. The casing extends within a...
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6802373 |
Apparatus and method of detecting interfaces between well fluids
An apparatus for use in circulating cement in a casing in a wellbore is described having a first component such as a sensor disposed on the casing and a second component such as a detectable device...
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6799634 |
Tracer release method for monitoring fluid flow in a well
A tracer release method for monitoring fluid flow in a well utilizes a deformable container having a liquid tracer material which container has an outlet which debouches into the neck portion of a...
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6691780 |
Tracking of particulate flowback in subterranean wells
Compositions and methods for tracking the transport of particulate solids during the production of hydrocarbons from a subterranean formation.
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6655457 |
Method for use in sampling and/or measuring in reservoir fluid
The invention relates to a method for use in sampling, flow measuring, quantity gauging, or possibly other analysis performed in reservoir fluid found in a ground formation. An object of the...
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6645769 |
Reservoir monitoring
A method for monitoring hydrocarbon and water production from different production zones/sections in a hydrocarbon reservoir and/or injection wells and detection of different phenomena such as e.g....
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6581686 |
Method of and device for tracing hydraulic fractures, stimulations, cement jobs, etc. in oil and gas wells
Tracing hydraulic fractures, stimulations, selective cement jobs, etc. in oil and gas wells includes introducing into a well in a zone of interest a plurality of radio frequency transmitting...
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6439310 |
Real-time reservoir fracturing process
Methods are disclosed for hydraulic fracturing of subterranean reservoir formations using various combinations of gelled fluid, nitrogen, and carbon dioxide base components, in association with...
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6302205 |
Method for locating a drill bit when drilling out cementing equipment from a wellbore
A method for locating a drill bit when drilling out cementing equipment from a casing of a wellbore. A first step involves placing in the casing of the wellbore at the time of placing cementing...
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6125934 |
Downhole tool and method for tracer injection
An injection apparatus and use thereof that comprises a plurality of spaced ejection ports from which the tracer composition can be ejected so as to be injected directly into a chosen layer of a...
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6125786 |
Underground warning system for underground conduits or pipes
The invention provides a warning to the excavation above a pipe, conduit or cable laid underground by a service utility by the directional drilling method by providing a coloured area of drilling...
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5595245 |
Systems of injecting phenolic resin activator during subsurface fracture stimulation for enhanced oil recovery
In connection with downhole placement of proppant materials for the purpose of enhancing oil recovery through a subsurface fracture-stimulation treatment, phenolic resin activator is injected after...
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5246861 |
Use of nonradioactive complex metal anion as tracer in subterranean reservoirs
Complex metal anions such as cobaltic hexacyanide are utilized as nonradioactive tracers in reservoir studies. Sensitive analytical procedures enable detection and measurement of very low tracer...
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5212093 |
Method to determine drift and residual oil saturation
Drift or residual oil saturation within a reservoir around a wellbore is determined by injection of a water-soluble tracer and then producing from the well. This injection is performed twice. The...
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5072387 |
Method for determining a transit time for a radioactive tracer
An improved method for deteriming the transit time of a radioactive tracer for steam injection profiles in steam injection wells is disclosed. Radiation decay data is collected at two detectors at...
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4788848 |
Chemical tracer determination of steam quality
A method and means for determining the quality of steam in a flowing steam line is disclosed. A tracer solution is injected into a steam flow line. The tracer solution contains a liquid tracer that...
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4722394 |
Determining residual oil saturation by radioactively analyzing injected CO.sub.2 and base-generating tracer-providing solution
Residual oil saturation is determined by injecting water containing CO 2 , a base-generating material and at least one radioactively labeled material which is or becomes a selectively water-soluble...
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4501324 |
Method for identifying the source of an oil
A method for tagging an oil so that subsequently it may be identified as to source by incorporating into the oil as a tracer material a minor amount of certain halohydrocarbons or halocarbons,...
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4223725 |
Method for reservoir fluid drift rate determination
The magnitude of fluid drift rate at a well in a reservoir is determined by first injecting a known volume of a fluid containing a tracer, then shutting in the well for a period of time to allow...
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4058366 |
Determination of flow characteristics of petroliferous formations
A method for determining the flow characteristics of subterranean petroliferous formations by injecting a tracer and a polysaccharide polymer having glucose moieties into said formation, recovering...
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3799261 |
TECHNIQUE FOR MEASURING FLUID DRIFT
Disclosed herein is a method for determining the presence and magnitude of fluid drift within a subterranean formation. A volume of a tracer chemical is injected into the formation by means of a...
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3385358 |
Corrosion protection for wells
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3372746 |
Method of determining the extent of return to the surface of an oil well treatment fluid
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3345868 |
Productivity logging apparatus
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3175614 |
Underground gas storage process
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