The Baker Hughes Well Geometry Instrument (WGI) measurement service acquires high-resolution data with openhole caliper measurements to provide early insight into the quality of the borehole for well completion decisions. Unlike previous caliper measurement services, the WGI service can obtain high-resolution measurements while running in or out of the borehole.
This service assesses the degree of hole enlargement and rugosity in order to select suitable intervals for the subsequent logging, sidewall coring, pressure testing, and fluid sampling services.
Borehole geometry is a key piece of information for both formation evaluation and well completion programs. The WGI service’s six independent radii measurements are used to generate an oriented 3D borehole profile, and they can also be used as input for more sophisticated borehole geometry analysis. This powerful profile enables the optimum design and effective installation of completion hardware such as screens, casing, and packers. In addition, drillers find this very useful for evaluating and improving drilling practices.
Ellipticity, commonly caused by borehole breakouts, is the most significant geometry information for geomechanical studies. The width and orientation of these breakouts provide direct measures of the in-situ stress field orientation.
Once the breakout studies are integrated with other openhole logs, such as density and acoustic slowness, the mechanical strength of the rock can be derived and used for future well path, mud program, and well completion designs.
The WGI service can be combined with other Baker Hughes wireline services to eliminate the need for an additional logging run, therefore reducing the cost of the operation.