Dielectric log-A logging method for determining oil saturation

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · J. Pet. Technol.; (United States)

OSTI ID:5248809

Xiuwen, G; Da, L; Shufang, Z; Yinzu, Y

This paper presents the principles of dielectric logging by describing measurement of phase shift, laboratory experiments, theoretical calculations for determining the vertical resolution and depth of investigation, and results of application in field practice. The dielectric constant of water-bearing sandstone with higher porosity is four times as large as that of the rock matrix. Therefore, the measurement of the dielectric constant can be used to determine water saturation of sandstone. The dielectric-constant logging is suitable for locating watered-out zones in a freshwater oil field, since the salinity has little effect on dielectric constant. A theoretical analysis shows that dielectric logging by means of phase-shift measurement has good vertical resolution and a certain depth of investigation. In homogeneous reservoirs, dielectric logging can be used to distinguish watered-out zones and to quantitatively interpret water saturation of the formation in conjunction with other well-logging methods. The investigation depth of present dielectric logging tools is not very satisfactory, especially since the deeper invaded zone has a great effect on measurement.

• Research Organization: Daqiny Petroleum Administrative Bureau
• OSTI ID: 5248809
• Journal Information: J. Pet. Technol.; (United States), Journal Name: J. Pet. Technol.; (United States) Vol. 35:10; ISSN JPTJA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
& Exploration
440400* -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
DIELECTRIC MATERIALS
ELECTRIC LOGGING
EQUIPMENT
MATERIALS
MEASURING METHODS
OIL SATURATION
OIL WELLS
PHASE SHIFT
RESERVOIR ROCK
SATURATION
WATER SATURATION
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS