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Fullbore Formation MicroImager

Borehole geology, geomechanics and 3D reservoir modeling

Determine net pay
The FMI Fullbore Formation MicroImager gives you microresistivity formation images in water-base mud. This is the preferred approach for determining net pay in laminated sediments of fluvial and turbidite depositional environments.

Visualize sedimentary features
These features define important reservoir geometries and petrophysical reservoir parameters. The interpretation of image-derived sedimentary dip data lets you understand sedimentary structures.

Interpret seismic sections
Well-to-well correlation is difficult in deviated wells with sections of steep and varying structural dip. Greatly improve structural interpretation of seismic sections with high-quality bedding dips to compute accurate logs of true stratigraphic thickness.

Get more data
Geological information from FMI borehole images helps with stochastic modeling of the sand-shale distribution. FMI images define channel heights superbly in amalgamated units. Other variables, such as the channel width and channel sinuosity, can be estimated using geological analogs, based on detailed sedimentological analysis of FMI image data.

Improve well construction plans
Borehole images improve your mechanical earth models which, in turn, help you optimize well plans. Better understanding of borehole stability can save you millions of dollars during field development.

Borehole geology, geomechanics and 3D reservoir modeling
Realtimenews@SPE: Imaging Aids Exploitation in Barnett Shale Gas Play
by Matt Varhaug
Fri, Sep 29, 2006 21:30 GMT

SAN ANTONIO, Texas - Formation imaging techniques are helping drillers and stimulation engineers exploit fractures and boost recoveries in the Barnett Shale of north-central Texas.

Schlumberger engineer George Waters described how imaging tools were used to detect natural, drilling-induced and offset-well hydraulic fractures in horizontal wellbores in a presentation to delegates earlier this week at the 2006 Society of Petroleum Engineers (SPE) Annual Technical Conference and Exhibition.

Electrical images from wireline tools, such as the FMI* Fullbore Formation MicroImager, or LWD tools, such as the GVR* geoVISION resistivity sub, respond to changes in resistivity caused by mineralogy, structure or induced features in the borehole.

Waters explained that features such as bedding planes, pyrite nodules, faults, natural fractures and drilling-induced fractures can be identified through imaging. "We have even identified hydraulic fracture sets from offset wells that intersected wells we were drilling," he said.

Effective formation stimulation is particularly vital to success in most gas-shale plays. Geoscientists are therefore particularly interested in the presence and orientation of drilling-induced fractures encountered along the lateral. Such fracture data provide valuable information regarding the orientation and magnitude of stresses in the formation. This information is key to planning stimulation treatments needed to make shale-gas wells commercially productive.

As more horizontal wells are drilled in low-permeability reservoirs, formation imaging is helping stimulation teams to characterize changes in reservoir quality along the length of the wellbore. This information is used to optimally place perforations, and to target areas where infill drilling would most effectively exploit the reservoir.

This technology is also being carried over to other shale developments such as the Woodford and Caney shales in Oklahoma, USA, and the Fayetteville shale in Arkansas, USA. As growth in horizontal gas-shale wells increases, opportunities to expand the application of this technology to optimize well completions in new basins will grow as well.


Waters G, Heinze J, Jackson R, Ketter A, Daniels J and Bentley D: "Use of Horizontal Well Image Tools to Optimize Barnett Shale Reservoir Exploitation," paper SPE 103202 presented at the 2006 SPE Annual Technical Conference and Exhibition, San Antonio, Texas, September 24?7, 2006.

*Mark of Schlumberger

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