Determination of formation dip/azimuth with multicomponent induction data
AssigneeHalliburton Energy Services, Inc.
InventorsJunsheng Hou, Dagang Wu, Burkay Donderici, Luis Emilio San Martin
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Abstract
The disclosure describes enhanced determination of dip and strike/azimuth for real-time MCI data processing in some difficult conditions such as low-dip and low-anisotropy formations using formation properties from surrounding layers. The method is effective for the enhanced determination of dip and azimuth to enhance the inversion accuracy of formation dip and azimuth if the formation anisotropic ratio is low and so reduce the uncertainty of the inverted dip and azimuth.
Claims20
A method for measuring formation properties, the method comprising:
- obtaining a set of multicomponent induction data representing layers of downhole formations;
- performing inversion processing on the set of multicomponent induction data to determine a set of formation parameters for each of the layers;
- and
- updating at least a portion of the set of formation parameters for each of the layers based on formation anisotropic ratios of neighboring layers.
A logging system, comprising:
- a logging tool having a longitudinal tool axis and a perpendicular tool axis, the tool having an antenna arrangement that provides, as a function of tool position in a borehole, a set of multicomponent induction data representing layers of downhole formations;
- and
- at least one processor;
- and
- a memory device containing instructions that when executed by the at least one processor perform operations including:
- performing inversion processing on the set of multicomponent induction data to determine a set of formation parameters for each of the layers;
- and
- updating at least a portion of the set of formation parameters for each of the layers based on formation anisotropic ratios of neighboring layers.
An apparatus for measuring formation properties, comprising:
- a computing device, including,
- a display and a user interface,
- one or more processors, the one or more processors coupled to the display, and
- one or more memory devices coupled to the processors;
- and
- one or more programs stored in one or more of the memory devices, the one or more programs comprising instructions to cause the one or more processors to,
- obtain a set of multicomponent induction data representing layers of downhole formations;
- perform inversion processing on the set of multicomponent induction data to determine a set of formation parameters for each of the layers;
- and
- update at least a portion of the set of formation parameters for each of the layers based on formation anisotropic ratios of neighboring layers.
Dependencies are inferred from the claim text.