Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Patent
1995-09-11
1999-05-04
Cosimano, Edward R.
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
7315202, 175 50, 702 11, E21B 4900
Patent
active
058999582
ABSTRACT:
A LWD tool is disclosed for providing an image of the borehole during drilling or during removal of the tool from the borehole. The tool includes imaging transducers which are fired based upon either time or direction. Borehole reflections are processed to determine time-of-flight to give an indication of standoff with respect to each transducer from which the borehole geometry can be obtained. The reflections also are analyzed for other information, such as the amplitude of the reflected signal. The time-of-flight and amplitude values are encoded and stored in memory for retrieval later. In addition to the imaging transducers, the imaging assembly also includes depth transducers to obtain a micro measurement of depth downhole. The micro-depth measurements are stored and/or transmitted to the surface. In addition, a directional sensor and clock are provided downhole to correlate the firing of the transducers and the receipt of reflections. The micro-depth measurements and directional measurements preferably are used with one more image signals to check for the presence of bed boundaries intersecting the borehole. If a boundary is present, the imaging assembly applies a best fit sine wave to the image signal, from which dip angle .alpha. and dip direction are obtained. In the preferred embodiment, acoustic transducers are used as the imaging transducers, although electromagnetic transducers or other suitable transducers may be used.
REFERENCES:
patent: Re35386 (1996-12-01), Wu et al.
patent: 2650067 (1953-08-01), Martin
patent: 2755431 (1956-07-01), Scherbatskoy
patent: 2755432 (1956-07-01), Arps et al.
patent: 2910133 (1959-10-01), Hudson et al.
patent: 2941784 (1960-06-01), Martin
patent: 3237153 (1966-02-01), Blizard
patent: 3312934 (1967-04-01), Stripling et al.
patent: 3593255 (1971-07-01), White
patent: 4297879 (1981-11-01), Howells et al.
patent: 4346593 (1982-08-01), Howells et al.
patent: 4581584 (1986-04-01), Baldwin
patent: 4649252 (1987-03-01), Obara
patent: 4718046 (1988-01-01), Medlin
patent: 4869349 (1989-09-01), Minear et al.
patent: 4930109 (1990-05-01), Kyle
patent: 4945761 (1990-08-01), Lessi et al.
patent: 4962490 (1990-10-01), Lyle et al.
patent: 5045795 (1991-09-01), Gianzero et al.
patent: 5064006 (1991-11-01), Waters et al.
patent: 5069308 (1991-12-01), Yin et al.
patent: 5107705 (1992-04-01), Wraight et al.
patent: 5146050 (1992-09-01), Strozeski et al.
patent: 5160925 (1992-11-01), Dailey et al.
patent: 5200705 (1993-04-01), Clark et al.
patent: 5230386 (1993-07-01), Wu et al.
patent: 5237539 (1993-08-01), Selman
patent: 5318137 (1994-06-01), Johnson et al.
patent: 5318138 (1994-06-01), Dewey et al.
patent: 5332048 (1994-07-01), Underwood et al.
patent: 5459697 (1995-10-01), Chin et al.
patent: 5511037 (1996-04-01), Randall et al.
patent: 5519668 (1996-05-01), Montaron
patent: 5586084 (1996-12-01), Barron et al.
J. Labo, A Practical Introduction to Borehole Geophysics (Society of Exploration Geophysicists 1986).
D.R. Skinner, Introduction to Petroleum Production, vol. 1, at 54-63 (Gulf Publishing Co. 1981).
Olsen, "Potential of MWD Tools," Euroil, Mar. 1993, pp. 17-18.
"Sonic While Drilling --Real-Time Data to Guide Real-Time Decisions," Schlumberger Oilfield Services catalogue.
J.R. Birchak, et al. "Standoff and Caliper Measurements While Drilling Using a New Formation-Evaluation Tool with Three Ultrasonic Transducers," Society of Petroleum Engineers (1995).
M. Greenspan, et al. "Tables of the Speed of Sound in Water," J. Acoust. Soc. Am., vol. 31, No. 1 (Jan. 1959).
C.C. Leroy, "Development of Simple Equations for Accurate and More Realistic Calculation of the Speed of Sound in Sea Water," J. Acoust. Soc. Am., vol. 46 (1969).
A.L. Podio, et al. "Ultrasonic Velocity and Attenuation Measurements in Water-Based Drilling Muds," ASME Drilling Technology Symposium, PD vol. 27 (Jan. 14-18, 1990).
Schlumberger Anadrill brochure: "Take your drilling in all directions with Anadrill," undated.
Schlumberger Anadrill brochure: "This is Anadrill's Drilling Image; So Is This (The Industry's Only Resistivity Imaging While Drilling)," undated.
Halliburton Logging Services, Inc. brochure: "CAST* Light On The Hole Picture," dated Aug. 1989.
Halliburton Logging Services, Inc. catalog: "Open Hole Services," dated Feb. 1992.
G.L. Moake, J.R. Birchak, R.G. Matthews and W.E. Schultz, Halliburton Energy Services, "Standoff and Caliper Measurements While Drilling Using a New Formation-Evaluation Tool with Three Ultrasonic Transducers," Society of Petroleum Engineers SPE 26494, copyright 1995.
David Patrick Murphy, Shell E&P Co., "Advances in MWD and formation evaluation for 1995," World Oil, Mar. 1995.
"Tool Images Formation While Drilling," Petroleum Engineer International, May 1995.
Introduction to Petroleum Production, pp. 8-36.
Dowell Iain Alexander
Seiler Douglas Donald
York Patrick Leon
Cosimano Edward R.
Halliburton Energy Service,s Inc.
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