Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1991-04-29
1992-01-14
Wieder, Kenneth A.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
343720, 343744, G01V 330
Patent
active
050814192
ABSTRACT:
A well logging apparatus and method for measuring the resistivity of the formation surrounding a borehole is disclosed. The invention provides two transmitting antennas arranged around a housing means or drill collar in spaced relation from one another. A transmitting circuit alternately supplies an oscillating drive signal to each transmitting antenna with a sufficiently high frequency such that one and then the other of the transmitting antennas radiates an electromagnetic wave signal which propagates through the formation. Two receiving antennas are located equally spaced between the transmitting antennas to produce pick-up signals from the electromagnetic wave propagating through the formation. Each receiving antenna includes a single turn coil connected in series with a capacitor to provide a reduced impedance circuit to resonate in the frequency region embracing the oscillating drive signal. Receive antenna circuitry responsive to induced alternating current in the coil produces a signal indicative of the formation parameter under study. The method of positioning two series resonant single turn receiving antennas tuned to the oscillating drive frequency and alternately coupling an electrical drive signal to a pair of transmitters spaced equally on each side of the receiving antennas allows receiving signals which are self-cancelling for system induced effects.
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: 4334227 (1982-06-01), Marks
patent: 4451789 (1984-05-01), Meador
patent: 4511842 (1985-04-01), Moran et al.
patent: 4511843 (1985-04-01), Thoraval
patent: 4536714 (1985-08-01), Clark
patent: 4538109 (1985-08-01), Clark
patent: 4553097 (1985-11-01), Clark
patent: 4570123 (1986-02-01), Grosso
patent: 4609873 (1986-09-01), Cox et al.
patent: 4622518 (1986-11-01), Cox et al.
patent: 4626785 (1986-12-01), Hagiwara
patent: 4651101 (1987-03-01), Barbar et al.
patent: 4692706 (1987-09-01), Mazzagatti et al.
patent: 4703278 (1987-10-01), Nussbaum et al.
patent: 4730161 (1988-03-01), Cox et al.
patent: 4761656 (1988-08-01), Cosman 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: 4968940 (1990-11-01), Clark et al.
Coope et al., "Formation Evaluation Using EWR Logs", SPE 14062, Mar. 1986.
Log Interpretation Principles/Applications, pp. 132, 133, 137, Oct. 1987.
Koopersmith et al., "Environmental Parameters Affecting Neutron Porosity, Gamma Ray, and Resistivity Measurements Made While Drilling", Society of Petroleum Engineers publication SPE 16758, Sep. 27-30, 1987.
Elliott et al., "Recording Downhole Formation Data While Drilling", Journal of Petroleum Technology, Jul. 1985.
"Drillcom", Literature: RLL Recorded Lithology Logging System, Measurements While Drilling Technical Specifications, 1985.
Coope et al., "Evaluation of Thin Beds and Low Resistivity Pays Using EWR Logs", Transactions of the Tenth European formation Evaluation Symposium, Aberdeen, Scotland, Apr. 22, 1986.
Chin et al., "Formation Evaluation Using Repeated Logging Symposium", Houston, Texas, Jun. 9-13, 1986.
Huchital et al., The Deep Propagation Tool, Society of Petroleum Engineers, SPE 10988, 1981.
Gianzero et al., "Determining the Invasion Near the bit with the M.W.D. Toroid Sonde", SPWLA Twenty-Seventh Annual Logging Symposium, Jun. 1986.
Gianzero et al., "A New Resistivity Tool for Measurement-While-Drilling", SPWLA Twenty-Sixth Annual Logging Symposium, Jun. 1985.
Grief et al., "Petrophysical Evaluation of Thinly Bedded Reservoirs in High Angle/Displacement Development Wells with the NL Recorded Lithology Logging System", The Log Analyst, Sep.-Oct. 1986.
Coope et al., "Formation Evaluation Using Measurements Recorded While Drilling", SPWLA Twenty-Fifth Annual Logging Symposium, Jun. 1984.
Holbrook, "The Effect of Mud Filtrate Invasion on the EWR Log A Case History", SPWLA Twenty-Sixth Annual Logging Symposium, Jun. 1985.
Hendricks et al., "MWD: Formation Evaluation Case Histories in The Gulf of Mexico", SPE 13187, Sep. 1984.
Rodney et al., "Electromagnetic Wave resistivity MWD Tool", SPE Drilling Engineering, Oct. 1986.
Franz, "Downhole Recording System for MWD", SPE 10054, Oct. 1981.
Blenkinsop et al., Deep Electromagnetic Propagation Tool Interpretation, SPWLA, Jun. 1986.
Besson et al., Environmental Effects on Deep Electromagnetic Logging Tools, SPWLA, Jun. 1986.
Rodney, P. F. et al., "The Electromagnetic Wave Resistivity MWD Tool", Society of Petroleum Engineers Conferenced paper, SPE 12167, presented 10/5/83, pp. 1-16.
Coope, D. et al., "The Theory of 2 MHz Resistivity Tool And Its Application To Measurement-While-Drilling", The Log Analyst, May/Jun. 1984, pp. 35-46.
Hall Ronald A.
Meador Richard A.
Meisner James E.
Mumby Edward S.
Thompson Larry W.
Baker Hughes Incorporated
Edmonds Warren S.
Hunn Melvin A.
Wieder Kenneth A.
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