Method and apparatus for a combined core magnet resonance - and formation testing for estimating the relative permeability by formation testing and core magnet resonance testing

摘要

Be it at the same time, the formation of testing and resistivity - as well as nmr - measurements is used, in order to determine a relative permeability for a surrounding the bore hole formation is representative. A method and apparatus for a precise determination of the relative permeability for a formation by measurement of saturation levels in a region of interest is provided, which consists of resistivity - or nmr - displays by way of the time during which / - pressure drop - testing. The method and device determining an effective permeability over the time for various chrome, in order to adjust the relative permeability for the formation to determine for each chrome, and it is also possible to determine the effectiveness of the use of a supplement to fluid in the formation to the increase in the formation level of productivity. The method and apparatus make possible a more accurate determination of the effective permeability of the irreducible saturation level. The method and device are also used for the determination of whether a buffer properly seals against the borehole wall, and in order to determine whether a probe is clogged.