Measuring and testing – Borehole or drilling – Downhole test
Patent
1982-01-04
1983-11-08
Birmiel, Howard A.
Measuring and testing
Borehole or drilling
Downhole test
E21B 4900
Patent
active
044135122
ABSTRACT:
A method of identifying potential low water cut hydrocarbon producing zones of a formation having significant water saturation (i.e. about 50% or more of the available pore space). The formation is logged to determine its water saturation. The formation rock is sampled at a level at which the log-indicated water saturation is significant. Sample rock is cleaned of hydrocarbons and saturated with brine. The spin-lattice relaxation time of hydrogen nuclei of the water molecules of the wetted sample is determined using nuclear magnetic resonance techniques and is used to determine the surface area of the sampled rock. An irreducible water saturation of the sampled formation rock is determined from the measured surface area and is plotted with the log-indicated formation water saturation at or at and about the level from which the rock sample was obtained. Levels where the irreducible water saturation approximate or exceed the log-indicated formation water saturation are zones from which hydrocarbons potentially may be recovered without significant attendant water production.
REFERENCES:
patent: 3508438 (1970-04-01), Alger et al.
An Improved Nuclear Magnetism Logging System and Its Application to Formation Evaluation, Herrick et al., Sep. 1979.
A New Approach for Low-Resistivity Sand Log Analysis, Murphy et al., Nov. 1972, Journal of Petroleum Technology, pp. 1302-1306.
An Investigation of Permeability, Porosity & Residual Water Saturation Relationships for Sandstone Reservoirs, A. Timur, Jul.-Aug. 1968, The Log Analyst, pp. 8-17.
Smackover Reservoir: Interpretation Case Study of Water Saturation Versus Production, Guillotte, et al., Transactions-Gulf Coast Association of Geological Societies, vol. XXIX, 1979, pp. 121-126.
A Method of Determining Permeability by Means of a Pulsed NMR and an Application of the Method to the Study of a Gulf Coast Supernormally Pressured Well, Seevers, Society of Petroleum Engineers of Aime, 1972, Paper #SPE 3847.
Surprising Productivity from Low-Resistivity Sands, Vajnar et al., SPWLA Eighteenth Annual Logging Symposium, Jun. 5-8, 1977.
The Use of Core Analysis Data to Explain the Abnormally Low Resistivities of Some Hydrocarbon-Productive Simpson Series Sands in Central Oklahoma, Gauntt, et al., Core Laboratories, Inc. SPWLA 4th Annual Logging Symposium Transactions May 23-24, 1963.
Electric Log Detection of Diagenetically Altered Reservoirs and Diagenetic Traps, Almon, et al., Transactions-Gulf Coast Association of Geological Societies, vol. XXIX, 1979, pp. 1-10.
Birmiel Howard A.
Gilman M. G.
McKillop A. J.
Mobil Oil Corporation
Powers, Jr. J. F.
LandOfFree
Method of locating potential low water cut hydrocarbon reservoir does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of locating potential low water cut hydrocarbon reservoir, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of locating potential low water cut hydrocarbon reservoir will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2002426