Open AccessFluid-Rock Characterization and Interactions in NMR Well Logging
Author(s) -
George J. Hirasaki
Publication year - 2001
Language(s) - English
Resource type - Reports
DOI - 10.2172/782900
Subject(s) - characterization (materials science) , wetting , monte carlo method , porous medium , petroleum engineering , oil field , porosity , formation evaluation , materials science , geology , geotechnical engineering , mathematics , composite material , statistics , nanotechnology
The objective of this project is to characterize the fluid properties and fluid-rock interactions that are needed for formation evaluation by NMR well logging. This is the first annual progress report submitted to the DOE. It reports on the work completed during the reporting period even if it may have started before this period. This project is a partnership between Professor George J. Hirasaki at Rice University and Professor Kishore Mohanty at University of Houston. In addition to the DOE, this project is supported by a consortium of oil companies and service companies. The fluid properties characterization has emphasized the departure of live oils from correlations based on dead oils. Also, asphaltic components can result in a difference between the T1 and T2 relaxation time distributions as well as reduce the hydrogen index. The fluid rock characterizations that are reported here are the effects of wettability and internal magnetic field gradients. A pore reconstruction method ha s been developed to recreate three-dimensional porous media from two-dimensional images that reproduce some of their key statistical properties. A Monte Carlo simulation technique has been developed to calculate the magnetization decay in fluid saturated porous media given their pore structure