The Cased Hole Formation Resistivity Log - Does It
Have Applications In Kansas?
Recent progress in developing the cased hole formation resistivity (CHFR) log has been encouraging. Although most trials of the log have been conducted overseas and in the more prolific domestic reservoirs, evidence from these trials indicates the potential for use in the more common producing fields in this country.
Basically, the log is capable of determining relative water and hydrocarbon saturations in a well equipped with steel casing. Previously, only the Pulsed Neutron Capture (PNC) logs were able to provide an estimate of saturations. The CHFR, with its deeper radius of investigation, is able to investigate more of the reservoir than the PNC, and should provide more reliable data.
The primary application of the CHFR is reservoir monitoring. In addition to quantitative saturation determination, the log is capable of monitoring oil/water contacts, measure residual oil saturation during a waterflood, identify swept and bypassed zones, and allow for re-examination of wells with old resistivity logs.
PTTC will be presenting more information on the cased hole formation resistivity log at the Petroleum Technology Fair on March 27 in Wichita. You are encouraged to attend and learn more about this remarkable new tool.