Image Features in Nonconductive Mud as Small as 0.4 in
Image microresistivity in nonconductive mud systems
The OBMI oil-base microimager tool furthers microresistivity imaging in nonconductive invert-emulsion mud systems.
With conventional tools, even a thin film of nonconductive mud is essentially an opaque curtain. The mud prevents conventional microresistivity imagers from measuring the formation. The presence of nonconductive mudcake or mud filtrate further complicates the situation.
Visualize the reservoir
With OBMI images, you can see structural and stratigraphic features as small as 0.4 in [1 cm], giving you high-resolution, azimuthal information. This image capture and resolution are not possible with conventional logging techniques.
The resemblance of OBMI images to whole-round core lets you easily visualize the reservoir. This is a first for the nonconductive mud environment.
The OBMI tool has been validated in the field with more than 20 brands of diesel-, oil-, and synthetic-base muds.
Increase net pay count
A Gulf of Mexico deepwater operator ran the OBMI tool in a partially cored appraisal well. The image accurately reproduced the cored interval to successfully extend stratigraphic analysis beyond the cored interval. The OBMI Rxo data correlated well with grain-size information from sidewall cores. The operator increased the resulting net pay count by more than 50 ft from the conventional log analysis.
Maximize productivity
Structural dip—too subtle for a dipmeter—was revealed clearly in another OBMI image, confirming that the reservoir had been penetrated in the planned location. The image also confirmed fractures perpendicular to the planned lateral, a critical factor in maximizing productivity in a Canadian horizontal well.
Benefits
- Detect and measure features too small for conventional logs
- Detect anisotropic features
- Differentiate structural and stratigraphic features
- Retain flexibility in choosing mud systems
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