Patent application number | Description | Published |
20110108325 | Integrating Multiple Data Sources for Drilling Applications - A drilling system makes measurements of at least one drilling parameter such as downhole weight on bit, bit torque, bit revolutions, rate of penetration and bit axial acceleration, and at least one measurement responsive to formation properties. One or more processors use the measurements of drilling parameters and formation properties to adjust drilling parameters. | 05-12-2011 |
20120097450 | SYSTEM AND METHOD FOR AUTOMATIC DETECTION AND ANALYSIS OF BOREHOLE BREAKOUTS FROM IMAGES AND THE AUTOMATIC GENERATION OF ALERTS - Disclosed is a method for detecting a pair of opposing breakouts in a borehole penetrating an earth formation. The method includes: conveying a downhole tool configured to perform measurements of a property of the earth formation; producing an image of the earth formation from the measurements, the image comprising a plurality of sectors; dividing the sectors into radial segments, each segment corresponding to an opposite segment; rotating the segments at least one sector at a time until a specified angle is achieved; calculating an average value for the measurements associated with each segment for each rotation of the segments; stacking the average values for opposing segments to produce stack values; determining a maximum or minimum stack value; determining if the maximum or minimum stack value exceeds a threshold value; and detecting the first breakout and the second breakout if the maximum or minimum stack value exceeds the threshold value. | 04-26-2012 |
20120188090 | SYSTEM AND METHOD FOR GENERATION OF ALERTS AND ADVICE FROM AUTOMATICALLY DETECTED BOREHOLE BREAKOUTS - A method for generating an alert or advice for drilling a borehole penetrating an earth formation includes: receiving with a processor a borehole image from a downhole tool disposed at a drill tubular drilling the borehole; detecting a first breakout and a second breakout shifted approximately 180° apart from the first breakout if breakouts are in the image using a method for detecting breakouts implemented by the processor; and generating an alert or advice with the processor if the first and second breakouts are detected. | 07-26-2012 |
20120199397 | System and Method for Determining Pressure Transition Zones - A method and apparatus for estimating a pressure transition zone in a borehole is disclosed. A parameter indicative of formation fluid pressure at a plurality of borehole depths is measured. A global trend of the parameter is determined over a first depth interval and a local trend of the parameter is determined over a second depth interval. A relation is determined between the global trend and the local trend, and the pressure transition zone is determined from the determined relation between the determined global trend and the determined local trend. | 08-09-2012 |
20130066558 | METHOD TO ESTIMATE PORE PRESSURE UNCERTAINTY FORM TRENDLINE VARIATIONS - Disclosed is a method for estimating a pore pressure of an earth formation penetrated by a borehole and an associated uncertainty. The method includes: conveying a carrier through the borehole; performing formation measurements relating to porosity at a plurality of depths in the borehole using a downhole tool coupled to the carrier; defining a first depth interval and a second depth interval deeper than the first depth interval, the first depth interval comprising a first set of formation measurement points and the second depth interval comprising a second set of formation measurement points; establishing a plurality of trendlines of depth versus porosity-related measurements using a processor with each trendline in the plurality of trendlines extending from a point in the first depth interval through a point in the second depth interval; and calculating a pore pressure line and associated uncertainty using the plurality of trendlines. | 03-14-2013 |
20140076632 | METHOD TO PREDICT OVERPRESSURE UNCERTAINTY FROM NORMAL COMPACTION TRENDLINE UNCERTAINTY - A method for predicting a pressure window for drilling a borehole in a formation includes: obtaining a pore pressure related data value of the formation using a data acquisition tool; predicting pore pressure uncertainty from the pore pressure related data value of the formation using a processor; estimating uncertainty of a pressure window for drilling fluid using the predicted pore pressure uncertainty using a processor; and applying the estimated uncertainty to the pressure window to provide a modified pressure window using a processor. | 03-20-2014 |
20140121972 | SYSTEM AND METHOD FOR WELL DATA ANALYSIS - A method of processing data generated from an energy industry or oilfield operation includes: receiving a data set representing parameter values generated during at least a portion of the operation, the parameter values including values of a plurality of parameters relating to the operation; dividing the data set into a plurality of data subsets, each data subset including values for multiple parameters; determining a measure of similarity between data in each subset relative to data in one or more other subsets; displaying a map of the data set in at least two dimensions, the map including a visual representation of each subset positioned relative to a visual representation of the one or more other subsets based on the measure of similarity; and analyzing the map to estimate a condition associated with the operation. | 05-01-2014 |
20140214325 | SYSTEM AND METHOD FOR CHARACTERIZATION OF DOWNHOLE MEASUREMENT DATA FOR BOREHOLE STABILITY PREDICTION - A method for estimating a time at which a pressure window relevant observation occurred relating to an event that occurred in an open borehole penetrating an earth formation includes: receiving with a processor a pressure window relevant observation that provides input to adjusting a pressure window for drilling fluid for drilling the borehole; and estimating with the processor a time window in which a physical parameter, a chemical parameter, or a process that caused the pressure window relevant observation to occur, the time window having a start time and an end time. | 07-31-2014 |
20140330521 | METHOD TO ESTIMATE PORE PRESSURE UNCERTAINTY FROM TRENDLINE VARIATIONS - Disclosed is a method for estimating a pore pressure of an earth formation penetrated by a borehole and an associated uncertainty. The method includes: conveying a carrier through the borehole; performing formation measurements at a plurality of depths in the borehole using a downhole tool coupled to the carrier; defining a first depth interval and a second depth interval deeper than the first depth interval, the first depth interval including a first set of formation measurement points and the second depth interval including a second set of formation measurement points; establishing a plurality of trendlines of depth versus formation measurements using a processor with each trendline in the plurality of trendlines extending from a point in the first depth interval through a point in the second depth interval; and calculating a pore pressure line and associated uncertainty using the plurality of trendlines. | 11-06-2014 |