Method and apparatus for using measurements of the NMR NMR to gather information on the properties of the ground configuration earth formation pit well of wellbore

摘要

Abstract: the present invention relates to a method for compiling information on the pore pressure interstitial pressure in the earth formation earth formation surrounding a pit well of wellbore.The method comprises preliminary steps for choosing suitable feature and at least one (for example, porosity, composition of drilling fluid drilling fluid composition, environment etc.) drilling and drilling environment Which is determined by the well bore wellbore configuration surrounding Wbaramtr) nuclear magnetic resonance (NMR) and at least one (for example, the distribution of T2 in response to the measured NMR)).The method selects the appropriate attribute a property that can be linked to their values at the level of the range from the bottom of the well bore wellbore mutualism with distinctive properties, with the pressure behavior Alkhla I pore ground composition pressure earth formation. The method also includes, in addition to implement NMR measured at a bottom of the well bore wellbore, thus being generated in response to the measured... NMR) of a drill drilling environment.Then, a correlation of the measured values Lbaramtr (NMR) in response to the NMR with property values. Then, the appropriate property values are compared at a depth of, and a correlation for the commonality among the property values of the interstitial pressure pore pressure via the The depths.In this way, the characteristic properties of the interstitial pressure is set in the ground earth configuration formation across a range of depths of the crater of the well. Wellbore