Method and apparatus for the use of multicomponent induction tool for geosteering and formation resistivity data interpretation in horizontal wells
AssigneeBaker Hughes Incorporated
InventorsGulamabbas A. Merchant, Otto N. Fanini, Berthold Kriegshauser, Liming Yu
Life of this patent
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Abstract
Measurements made with a multicomponent logging instrument when used in a substantially horizontal borehole in earth formations are diagnostic of the direction of beds relative to the position of the borehole. When the logging instrument is conveyed on a drilling assembly, the drilling trajectory may be maintained to follow a predetermined trajectory or to maintain a desired distance from a boundary such as an oil-water contact.
Claims37
A method of determining a parameter of interest of an earth formation having a plurality of layers, the method comprising:
- (a) conveying a logging tool into a borehole in a selected layer in said formation, said borehole having a first axial direction inclined at a angle to a normal to said layers;
- (b) obtaining, at a selected frequency, a plurality of multi-component resistivity measurements indicative of said parameter of interest;
- (c) obtaining a resistivity value for each of said plurality of layers;
- and
- (d) processing said plurality of multi-component measurements using said obtained resistivity for said plurality of layers and determining therefrom said parameter of interest.
A method of drilling a borehole in an earth formation, the method comprising:
- (a) conveying a logging tool on a bottom hole assembly (BHA) into said borehole in a selected layer in said formation, said borehole having a first axial direction inclined at a angle to a normal to said layers, said BHA including a device for drilling of the borehole;
- (b) using said logging tool to obtain a plurality of multi-component resistivity measurements indicative of resistivities of said earth formation in a vicinity of said borehole;
- (c) comparing said plurality of multi-component resistivity measurements with expected values of said measurements obtained from a model;
- and
- (d) controlling a direction of drilling of said drilling device on said BHA in response to said comparison.
Dependencies are inferred from the claim text.