Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1997-06-16
1999-03-23
Patidar, Jay M.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
324341, G01V 308, G01V 310
Patent
active
058865268
ABSTRACT:
A method is disclosed for determining the horizontal resistivity, vertical resistivity, and dip of formations surrounding a borehole, comprising the following steps: (a) suspending a logging device in the borehole; (b) transmitting electromagnetic energy from a transmitter location on the logging device, and receiving the transmitted electromagnetic energy at receiver locations on the logging device for a first transmitter-to-receivers spacing associated with the transmitter and receiver locations; (c) determining, from the received electromagnetic energy, measurement characteristics associated with the first transmitter-to-receivers spacing; (d) repeating steps (b) and (c) for a plurality of further transmitter-to-receivers spacings to obtain measurement characteristics for the plurality of further transmitter-to-receivers spacings; (e) generating a model of anisotropic formations that has horizontal resistivity Rh, vertical resistivity Rv, and a Dip angle with respect to a borehole reference; (f) selecting initial model values of Rh, Rv and Dip; (g) computing an error value from the differences, for each of a plurality of the transmitter-to-receivers spacings, between the measurement characteristics and model measurement characteristics obtained from the model using the model values of Rh, Rv, and Dip; (h) modifying the model values of Rh, Rv and Dip; (i) repeating steps (g) and (h) to minimize the error value; and (j) outputting the ultimately modified model values of Rh, Rv, and Dip.
REFERENCES:
patent: 3305771 (1967-02-01), Arps
patent: 3551797 (1970-12-01), Gouilloud et al.
patent: 3849721 (1974-11-01), Calvert
patent: 4107597 (1978-08-01), Meador et al.
patent: 4185238 (1980-01-01), Huchital et al.
patent: 4209747 (1980-06-01), Huchital
patent: 4278941 (1981-07-01), Freedman
patent: 4300098 (1981-11-01), Huchital et al.
patent: 4302722 (1981-11-01), Gianzero
patent: 4302723 (1981-11-01), Moran
patent: 4451789 (1984-05-01), Meador
patent: 4468623 (1984-08-01), Gianzero et al.
patent: 4511843 (1985-04-01), Thoraval
patent: 4538109 (1985-08-01), Clark
patent: 4553097 (1985-11-01), Clark
patent: 4567759 (1986-02-01), Ekstrom et al.
patent: 4622518 (1986-11-01), Cox et al.
patent: 4626785 (1986-12-01), Hagiwara
patent: 4692706 (1987-09-01), Mazzagatti et al.
patent: 4730161 (1988-03-01), Cox et al.
patent: 4766384 (1988-08-01), Kleinberg et al.
patent: 4785247 (1988-11-01), Meador et al.
patent: 4899112 (1990-02-01), Clark et al.
patent: 4980643 (1990-12-01), Gianzero et al.
patent: 5081419 (1992-01-01), Meador et al.
patent: 5210495 (1993-05-01), Hapashy et al.
patent: 5278507 (1994-01-01), Bartel et al.
patent: 5329448 (1994-07-01), Rosthal
patent: 5345179 (1994-09-01), Habashy et al.
patent: 5361239 (1994-11-01), Zoeller
patent: 5389881 (1995-02-01), Bittar et al.
patent: 5434507 (1995-07-01), Beren et al.
patent: 5594343 (1997-01-01), Clark et al.
Anderson, B. and Chew, W.C., "A New High Speed Technique For Calculating Synthetic Induction and DPT Logs," SPWLA 25th Annual Logging Symposium, Paper HH. Jun. 10-13, 1984.
Morse, P. and Feshbach, H., Methods of Theoretical Physics, McGraw-Hill, New York, 1953, pp. 896-997.
Kong, Jin Au, Electormagnetic Wave Theory, Wiley-Interscience, pp. 120-182. 1986.
Clark, B. et al., "A Dual Depth Resistivity Measurement for FEWD", SPWLA 29th Annual Logging Symposium, Paper A. Jun. 5-8, 1988.
Golub and Van Lan, Matrix Computations, Johns Hopkins University Press, (1985), pp. 16-20. No month.
Clark, B., "Electromagnetic Propagation Logging While Drilling: Theory and Experiment", SPE Paper 18117 presented at 63rd Annual Technical Conference and Exhibition, Houston, Texas, Oct. 2-5, 1998.
Bonner, S. et al., "New 2-MHZ Multiarray Borehole-Compensated Resistivity Tool Developed for MWD in Slim Holes," SPE Paper 30547, presented at SPE Annual Technical Conference & Exhibition in Dallas, Texas, 22-25 Oct., 1995.
Kunz, K. S. et al., "Some Effects of Formation Anisotropy on Resistivity Measurements in Boreholes", Geophysics, vol. 23, No. 4. Feb. 28, 1958.
Moran, J.H. et al. "Effects of Formation Anisotropy on Resistivity Logging Measurements", Geophysics, vol. 44, No. 7. Jul. 7, 1979.
Chemali, R. et al., "The Effect of Shale Anisotropy on Focused Resistivity Devices", SPWLA 28th Annual Logging Symposium, Jul. 21, 1987.
Press, W.H. et al.,Numerical Recipes in C (Second Edition), Cambridge University Press (1987), pp. 683-688. No month.
Luling, M. et al., "Processing and Modeling 2-MHZ Resistivity Tools in Dipping, Laminated, Anisotropic Formations", Paper QQ, SPWLA 35th Annual Logging Symposium, Jun. 19-22, 1994.
Hagiwara, T., "A New Method to Determine Horizontal-Resistivity in Anisotropic Formations without Prior Knowledge of Relative Dip", Paper Q, SPWLA 37th Annual Logging Symposium, Jun. 16-19, 1996.
Carnahan, B. et al., Applied Numerical Methods, John Wiley & Sons (1969), pp. 319-320. No month.
Press, W.H. et al., Numerical Recipes, Cambridge University Press (1987), pp. 289-293. No month.
Kanak Wayne I.
Novack Martin M.
Patidar Jay M.
Schlumberger Technology Corporation
LandOfFree
Apparatus and method for determining properties of anisotropic e does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for determining properties of anisotropic e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for determining properties of anisotropic e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2129976