Corrections for downhole NMR logging

NMR Logging to Estimate Hydraulic Conductivity in Unconsolidated Aquifers.

Nuclear magnetic resonance (NMR) logging provides a new means of estimating the hydraulic conductivity (K) of unconsolidated aquifers. The estimation of K from the measured NMR parameters can be performed using the Schlumberger-Doll Research (SDR) equation, which is based on the Kozeny-Carman equation and initially developed for obtaining permeability from NMR logging in petroleum reservoirs. T...

Development of Pdc Bits for Downhole Motors

Downhole Applications of Magnetic Sensors

In this paper we present a review of the application of two types of magnetic sensors-fluxgate magnetometers and nuclear magnetic resonance (NMR) sensors-in the oil/gas industry. These magnetic sensors play a critical role in drilling wells safely, accurately and efficiently into a target reservoir zone by providing directional data of the well and acquiring information about the surrounding ge...

Rock typing and reservoir zonation based on the NMR logging and geological attributes in the mixed carbonate-siliciclastic Asmari Reservoir

Rock typing is known as the best way in heterogeneous reservoirs characterization. The rock typing methods confine to various aspects of the rocks such as multi-scale and multi-modal pore types and size, rock texture, diagenetic modifications and integration of static/dynamic data. Integration of static and dynamic behavior of rocks and their sedimentary features are practiced in this study. Po...

Vibrational Corrections in NMR Spectra of Oriented Molecules

Nuclear magnetic resonance of oriented molecules provides a convenient and precise technique for determination of molecular geometry. The precision is often high enough for the effect of the vibrational motions to be felt. In this paper the vibrational corrections are discussed in detail, and a novel formulation is presented which, apart from its simplicity, provides distinct advantages in nume...