Measuring and testing – Borehole or drilling – Downhole test
Patent
1982-01-18
1984-03-13
Birmiel, Howard A.
Measuring and testing
Borehole or drilling
Downhole test
364422, E21B 4900
Patent
active
044359772
ABSTRACT:
A method of identifying potential low water cut hydrocarbon producing zones in a sand or sandstone formation by logging the formation to determine its permeability and porosity values and generating from said two sets of values a log of specific surface areas of the formation. The aforesaid zones may be identified directly from the specific surface area log as being those regions in which the specific surface areas are about 500 m.sup.2 /cm.sup.3 bulk volume or more. Alternatively or additionally, the specific surface area log may be used to determine irreducible water saturation values of the formation which can then be compared with fractional water saturation values. The aforesaid zones are those in which the irreducible water saturation values approximate or exceed the fractional water saturation values.
REFERENCES:
patent: 4369497 (1983-01-01), Poupon et al.
Murphy and Owens "A New Approach for Low-Resistivity Sand Log Analysis", Journal of Petroleum Technology, pp. 1302-1306, Nov. 1972.
Log Interpretation, vol. I-Principles, Schlumberger Ltd., pp. 104 and 37-41 (1972 Edit.).
Vajnar et al. "Surprising Productivity from Low Resistivity Sands" 18th Annual Logging Symposium Transactions, Society of Professional Well Logging Analysts (SPWLA), Jun. 5-8, 1977.
Gauntt et al. "The Use of Core Analysis Data to Explain the Abnormally Low Resistivities of Some Hydrocarbon-Productive Simpson Series Sand in Central Oklahoma", 4th Annual Logging Symposium Transactions, SPWLA, May 23-24, 1963.
Timur "An Investigation of Permeability, Porosity & Residual Water Saturation Relationships for Sandstone Reservoirs", The Log Analyst, pp. 8-17, Jul.-Aug. 1968.
Birmiel Howard A.
Gilman M. G.
McKillop A. J.
Mobil Oil Corporation
Powers, Jr. J. F.
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