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1.发明公开
公开(公告)号：EP3194717A4
公开(公告)日：2018-06-06
申请号：EP14904724
申请日：2014-10-31
CPC分类号： E21B47/0005 , G01N29/11 , G01V1/375 , G01V1/50 , G01V3/38
摘要： A method for generating a cement bond log, in some embodiments, comprises transmitting sonic or ultra-sonic waves in multiple directions from a logging tool disposed in a wellbore, receiving reflected waves at the logging tool and recording waveforms based on the received waves, processing the waveforms to determine numerical values that indicate a degree of bonding associated with multiple portions of a cement sheath disposed in the wellbore, aggregation the numericakl value, and generating a composite image based on the aggregated numerical values.
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2.发明公开
公开(公告)号：EP3204604A4
公开(公告)日：2018-05-23
申请号：EP14905204
申请日：2014-10-31
CPC分类号： E21B47/0005 , G01V1/50
摘要： A method for evaluating a cement sheath in a wellbore, in some embodiments, comprises transmitting sonic or ultrasonic waves from a logging tool disposed in a wellbore, receiving reflected waves at the logging tool and recording waveforms based on the received waves, processing the waveforms to determine average absolute value amplitude data for each of a plurality of zones, and determining a number using average absolute value amplitude data for a first of the plurality of zones and average absolute value amplitude data for a second of the plurality of zones.
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3.发明公开
公开(公告)号：EP3152386A4
公开(公告)日：2018-03-07
申请号：EP15834580
申请日：2015-08-10
摘要： Casing removal operations may utilize an analytical model to the estimate the total force to (1) break bonding between a cut casing and the annular materials contained between the cut casing and the surrounding borehole and (2) pull the cut casing upward through the borehole while taking into account frictional forces inside and outside the cut casing, shear forces, and the like. Such models may further predict the casing overpull and total tension needed to extract the cut casing from the borehole. Using these models in conjunction with the specifications of the casing retrieval equipment may allow for determining the cutting depth for producing the cut casing with higher accuracy than previously available.
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4.发明公开
公开(公告)号：EP3167155A4
公开(公告)日：2018-02-28
申请号：EP15840473
申请日：2015-09-02
CPC分类号： G01V11/002 , E21B47/00 , E21B47/0005 , G01V5/14 , G01V11/00
摘要： A method includes introducing a tool string into a wellbore having annular material disposed in an annulus defined between casing and the wellbore. Obtaining acoustic refracted waveform measurements of the annular material from a cement bond logging tool, obtaining ultrasonic measurements of the annular material from a circumferential acoustic scanning tool, obtaining gamma radiation measurements scattered from the annular material from a spectral density logging tool, and obtaining thermal neutron radiation measurements scattered from the annular material from a dual spaced neutron logging tool. Obtained measurements may then be collected and computed with a computer and a deliverable is generated that includes one or more cross plots providing a compositional equivalent of the annular material.
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