X-ray CT and NMR imaging of rocks

Journal Article · Sat Mar 01 00:00:00 EST 1986 · J. Pet. Technol.; (United States)

DOI:https://doi.org/10.2118/15277-PA· OSTI ID:5702162

Vinegar, H J

In little more than a decade, X-ray computerized tomography (CT) and nuclear magnetic resonance (NMR) imaging have become the premier modalities of medical radiology. Both of these imaging techniques also promise to be useful tools in petrophysics and reservoir engineering, because CT and NMR can nondestructively image a host of physical and chemical properties of porous rocks and multiple fluid phases contained within their pores. The images are taken within seconds to minutes, at reservoir temperatures and pressures, with spatial resolution on the millimeter and submillimeter level. The physical properties imaged by the two techniques are complementary. CT images bulk density and effective atomic number. NMR images the nuclide concentration, M/sub 0/, of a variety of nuclei (/sup 1/H, /sup 19/F, /sup 23/Na, /sup 31/P, etc.), their longitudinal and transverse relaxation-time curves (t/sub 1/ and t/sub 2/), and their chemical shift spectra. In rocks, CT images both rock matrix and pore fluids, while NMR images only mobile fluids and the interactions of these mobile fluids with the confining surfaces of the pores.

• Research Organization: Shell Development Co.
• OSTI ID: 5702162
• Journal Information: J. Pet. Technol.; (United States), Vol. 38:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
PETROLEUM DEPOSITS
EXPLORATION
RESERVOIR ROCK
COMPUTERIZED TOMOGRAPHY
NMR SPECTRA
BULK DENSITY
IMAGE PROCESSING
IMAGES
NUCLEAR MAGNETIC RESONANCE
PETROGRAPHY
POROSITY
RESERVOIR ENGINEERING
RESERVOIR PRESSURE
RESERVOIR TEMPERATURE
SPATIAL RESOLUTION
X-RAY RADIOGRAPHY
X-RAY SOURCES
DENSITY
DIAGNOSTIC TECHNIQUES
ENGINEERING
EQUIPMENT
GEOLOGIC DEPOSITS
INDUSTRIAL RADIOGRAPHY
MAGNETIC RESONANCE
MINERAL RESOURCES
PHYSICAL PROPERTIES
PROCESSING
RADIATION SOURCES
RESOLUTION
RESONANCE
RESOURCES
SPECTRA
TOMOGRAPHY
X-RAY EQUIPMENT
020200* - Petroleum- Reserves
Geology
& Exploration