Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate
2005-10-25
2005-10-25
Patidar, Jay (Department: 2862)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
C324S338000, C324S333000
Reexamination Certificate
active
06958610
ABSTRACT:
A logging tool is disclosed having transmitting and receiving antennas to measure formation anisotropy. The antennas may preferably be combinations of toroidal, horizontal electric dipole, and horizontal magnetic dipole antennas. In one embodiment, the tool: (a) induces a current flow in the tubing or drill string traversing the formation in a borehole; (b) measures a signal difference between two receiver antennas on the drill string; (c) determines an apparent conductivity of the formation from the resistive component of the signal difference; and (d) uses the apparent conductivity to calculate an anisotropy coefficient with a knowledge of the horizontal conductivity. The tool may further determine a second apparent conductivity of the formation from the reactive component of the signal difference, and use both apparent conductivities to calculate the anisotropy coefficient and the horizontal conductivity. The vertical conductivity can also be determined from these two calculated values in the usual manner.
REFERENCES:
patent: 4302722 (1981-11-01), Gianzero
patent: 4302723 (1981-11-01), Moran
patent: 4553097 (1985-12-01), Clark
patent: 5235285 (1993-08-01), Clark et al.
patent: 5966013 (1999-10-01), Hagiwara
patent: 0 527 089 (1993-02-01), None
patent: 0 869 376 (1998-07-01), None
patent: WO 00 50926 (2000-08-01), None
Moran, J. H. and Gianzero, S., 1979,Effects of formation anistrophy of resistivity-logging measurements: Geophysics, 44, pp. 1273.
Kuntz, K., and Moran, J. H., S., 1962,Basic theory of induction logging and application to study two-coil sondes: Geophysics, 27, pp. 829-858.
Kuntz, K., and Moran, J. H., S., 1958,Some effects of formation anisotropy on resistivity measurements in boreholes: Geophysics, 23, pp. 770-794.
Moran, J. H. and Gianzero, S., 1979,Effects of formation anisotropy of resistivity-logging measurements: Geophysics, 44, pp. 1276.
Chemali, R., Gianzero, S. and S.M. Su, 1987,The effect of shale anisotropy on focused resistivity devices: SPWLA 28th Ann. Logging Symp., paper H.
Anderson, B. et al., 1990,Response of 2-MHz LWD resistivity and wireline induction tools in dipping beds and laminated formations: SPWLA 31st Ann. Logging Symp., paper A.
Luling, M. et al., 1994,Processing and modeling 2-MHz resistivity tools in dipping, laminated, anisotropic formations: SPWLA 35th Ann. Logging Symp., paper QQ.
Hagiwara, T., 1995,Induction log analysis of thinly laminated sand/shale formation: SPE Formation Evaluation, Jun., pp. 86-90.
Hagiwara, T., 1996,EM log response to anisotropic resistivity in thinly laminated formations with emphasis on 2-MHz resistivity devices: SPE Formation Evaluation, Dec., pp. 211-217.
Tabarovsky, L., Epov, M., and Kagansky, A., 1977,Focusing systems of inductance logging in anisotropic media: Geol. i Geofiz, No. 9.
Xiao, J., Beard, D., and Zhou, Q., 1996,A practical dipping-effect correction for multiarray induction tools in deviated wells: SPWLA 37th Ann. Logging Symp., paper R.
Gianzero, S., 1999,The paradox of anisotropy revisited: The Log Analyst, vol. 40, No. 6, pp. 485-491.
Gianzero, S. et al., 1985,A new resistivity tool for measurement-while-drilling: SPWLA 26th Ann. Logging Symp., paper A.
Kriegshauser, B. et al., 2000,A new multicomponent induction logging tool to resolve anistropic formations: SPWLA 41st Ann Logging Symp., Paper D.
British Search Report dated Jan. 28, 2003, Application No. GB 0214674.4 (2 p.).
French Search Report dated Feb. 21, 2003, Application No. FA 620652 (2 p.).
Karinski, A. and Moustaov, A., “Vertical Resistivity Estimation With Toroidal Antennas in Transversely Isotropic Media,” SPWLA 42nd Annual Logging Symposium, Jun. 17-20, 2001, paper BB, 14 P.
Karinski, A. and Moustaov, A., “Feasibility of Vertical-Resistivity Determination By the LWD Sonde With Toroidal Antennas for Oil-Base Drilling Fluid, ” SPWLA 43nd Annual Logging Symposium, Jun. 2-50, 2002 paper Q, 13 p.
Conley & Rose, P.C.
Halliburton Energy Service,s Inc.
Patidar Jay
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