Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1980-07-14
1982-09-14
Smith, Alfred E.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
G01V 500
Patent
active
043497373
ABSTRACT:
This invention relates to determining the movable oil saturation in underground rock reservoir by use of a log-inject-log technique. The formation rock adjacent to the wellbore is prepared such that the saturation conditions are representative of those in the interwell area. A pulsed neutron log is then run. A crude oil is injected into the formation. A second pulsed neutron log is then run. A chlorinated crude oil is injected into the formation to displace the previously injected crude oil. A third pulsed neutron log is then run. A salt water of known salinity is then injected into the well to displace a portion of the chlorinated crude oil and all of the formation water. A fourth pulsed neutron log is then run. Fresh water is then injected into the formation to displace the injected salt water. A fifth pulsed neutron time log is then run. These five logs are then used to determine the reservoir characteristics.
REFERENCES:
patent: 3282095 (1966-11-01), Owens
patent: 3748474 (1973-07-01), Murphy
patent: 3825752 (1974-07-01), Murphy et al.
Murphy, R. P., et al. "The Use of Special Coring and Logging Procedures for Defining Reservoir Residual Oil Saturations," JPT (Jul. 1973).
Murphy, R. P., et al. "Evaluation of Waterflood Residual Oil Saturations Using Log-Inject-Log Procedures," SPE Paper 5804, presented at SPE-AIME Symposium, Mar. 1976.
Murphy Robert P.
Smith Roger L.
Brown Scott H.
Hook Fred E.
Howell Janice A.
Smith Alfred E.
Standard Oil Company (Indiana)
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