Patent application number | Description | Published |
20090296086 | TERAHERTZ ANALYSIS OF A FLUID FROM AN EARTH FORMATION USING A DOWNHOLE TOOL - Method and apparatus of analyzing a fluid from an earth formation using a downhole tool. In the method, the downhole tool is conveyed down a borehole in the earth formation, and a fluid drawn into a measurement portion of the downhole tool, where a spectroscopic measurement of the fluid is made in a terahertz radiation domain. The method may be part of a method of producing a mineral hydrocarbon material from an earth formation. | 12-03-2009 |
20100200743 | WELL COLLISION AVOIDANCE USING DISTRIBUTED ACOUSTIC SENSING - A method for obtaining location information about a well as it is being drilled through a subsurface, comprises: providing at least one fiber optic cable deployed in a borehole within acoustic range of the well, the proximal end of the cable being coupled to a light source and a photodetector, the fiber optic cable being acoustically coupled to the subsurface formation so as to allow acoustic signals in the subsurface to affect the physical status of the cable, providing an acoustic source in the well, transmitting at least one light pulse into the cable, receiving at the photodetector a first light signal indicative of the physical status of at least one first section of the cable. The first section is selected so that the first light signal provides information about the position of the acoustic source, and outputting at least the information to a display. | 08-12-2010 |
20100200744 | DISTRIBUTED ACOUSTIC SENSING WITH FIBER BRAGG GRATINGS - A method for obtaining information about a subsurface formation from acoustic signals that contain information about to the subsurface formation, comprises: providing a fiber optic having a proximal end and a remote end, with the proximal end being coupled to a light source and a proximal photodetector, wherein said fiber optic cable includes randomly spaced impurities and selectively placed Bragg gratings and wherein the fiber optic cable is acoustically coupled to the subsurface formation so as to allow the acoustic signals to affect the physical status of at least one grating: transmitting at least one light pulse into the cable; receiving at the photodetector a first light signal indicative of the physical status of at least one first section of the cable, and outputting at least one item of information to a display. | 08-12-2010 |
20120132007 | USE OF FIBER OPTICS TO MONITOR CEMENT QUALITY | 05-31-2012 |
20120132417 | SYSTEMS AND METHODS FOR MONITORING A WELL - A method for identifying fluid migration or inflow associated with a wellbore tubular, comprises measuring strain of the wellbore tubular with a system comprising at least one string of interconnected sensors that is arranged such that the sensors are distributed along a length and the circumference of the wellbore tubular; establishing a baseline that is a function of steady state strain measurements within a first time period; and identifying fluid migration or inflow where strain measurements substantially deviate from the baseline within a second time period. | 05-31-2012 |
20120136577 | SYSTEMS AND METHODS FOR MONITORING CORROSION IN A WELL | 05-31-2012 |
20120155508 | SYSTEMS AND METHODS FOR MONITORING A WELL - A method for analyzing fluid proximate an injection well, comprises turning an injector of fluid into the well on or off; determining temperature along a casing of the well during a first time period; and associating a rate of temperature change during the first time period with a fluid. | 06-21-2012 |