The deep propagation tool (A new electromagnetic logging tool)

Conference · Wed Sep 01 04:00:00 EDT 1982 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5328439

Huchital, G S; Clark, B; Hutin, R; Thoraval, Y

This paper discusses a new well logging tool, the Deep Propagation Tool. The device radiates electromagnetic energy into the formation surrounding the well bore. Measurements of the attenuation and velocity (wavelength) of this electromagnetic wave yield the resistivity and dielectric constant of the formation. Previous devices used to measure the dielectric constant of the formation have had relatively shallow depths of investigation. The Deep Propagation Tool uses a unique antenna array in order to return formation electrical parameters characteristic of the uninvaded formation. The device operates at a frequency in the tens of megahertz range and performs accurate measurements of signal level and relative phase at four receiver locations. These eight measurements can then be used to return a value for the formation resistivity and dielectric constant. The theoretical basis for the design of the tool is presented and applied to predict the environment effects on the response of the device. Attention is paid to the effect of the borehole on the measurement, the depth of investigation of the device, and its vertical resolution. Measurements have been made in wells in both Europe and South America. Results of these measurements show that the measurement of formation dielectric constant can be used to determine the presence of hydrocarbons in zones of variable connate water resistivities where traditional resistivity measurements are not easily applied.

• Research Organization: Etudes et Production Schlumberger
• OSTI ID: 5328439
• Report Number(s): CONF-820927-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE10988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BOREHOLES
CAVITIES
DEPTH
DESIGN
DIELECTRIC PROPERTIES
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRICAL SURVEYS
ELECTROMAGNETIC RADIATION
ELECTROMAGNETIC SURVEYS
EQUIPMENT
EUROPE
FREQUENCY RANGE
GEOPHYSICAL SURVEYS
LATIN AMERICA
MHZ RANGE
NATURAL GAS WELLS
OIL WELLS
PERFORMANCE
PHYSICAL PROPERTIES
RADIATIONS
RESERVOIR ROCK
SOUTH AMERICA
SURVEYS
WAVE PROPAGATION
WAVELENGTHS
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS