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NMR LOGGING IN FORMATION WITH MICRO-POROSITY BY USING FIRST ECHOES FROM MULTIPLE MEASUREMENTS
NMR LOGGING IN FORMATION WITH MICRO-POROSITY BY USING FIRST ECHOES FROM MULTIPLE MEASUREMENTS
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机译:使用多次测量的第一回波,在具有微孔隙度的地层中进行NMR测井
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摘要
A method for estimating a property of a subsurface material includes: conveying a carrier through a borehole penetrating the subsurface material; performing at least two magnetic resonance (NMR) measurements in a volume of interest in the subsurface material using an NMR tool disposed on the carrier, wherein (i) a first NMR measurement has a first wait time and a first first-echo time and a second NMR measurement has a second wait time and a second first-echo time, (ii) the first wait time and the second wait time are less than or equal to 500 milliseconds, and (iii) the first first-echo time and the second first-echo time are different; receiving at least the first-echo of the first NMR measurement and receiving at least the first-echo of the second NMR measurement; and estimating the property of the subsurface material by using the at least two measured first-echoes simultaneously.
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