Borehole testing of a micromachined silicon accelerometer

Albright, James N.; Gannon, Jeffery C.; Fairbanks, Thomas D.; Rutledge, James

doi:10.1190/1.1820987

Cited by 4 publications

(1 citation statement)

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“…The USDOE's Los Alamos National Laboratory has assembled an experimental drilling platform, conducted shallow microhole drilling tests, 18 and designed, fabricated, and evaluated the performance of microhole instrumentation packages 19,20 . The system is currently configured for straight, near-vertical microhole drilling in shallow-soft and medium-hard formations.…”

Section: Economicsmentioning

confidence: 99%

Selected U.S. Department of Energy’s EOR Technology Applications

Felber

2003

All Days

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TX 75083-3836 U.S.A., fax 01-972-952-9435. AbstractEnhanced oil recovery (EOR) innovations have paved the way for newer, more exciting technologies that provide improved EOR processes. Among the latest advancements are new methods for describing the reservoir, improved downhole instrumentation, and new chemicals engineered to improve recovery. These are just a few of the innovations available to geoscientists and engineers in their quest for better reservoir description and applications of improved EOR processes.The U. S. Department of Energy (USDOE) has sustained development of many of these technologies. This paper highlights some of the USDOE championed laboratory and field applications work in steamflooding, biotechnology, alkaline-surfactant-polymer (ASP) formulations and chemicals to increase carbon dioxide viscosity. Future challenges in applying EOR using microhole technology are also discussed.Advancements in steamflooding include mechanistic studies to better understand fluid and heat flow conditions. The biotechnology work discussed used resident microflora to selectively plug porous zones and increase oil recovery. The alkaline-surfactant-polymer work summarizes the laboratory and field work conducted in support of a shallow reservoir ASP application. The laboratory search for chemicals to increase the viscosity of carbon dioxide is also discussed.A new area of work is microhole technology-wellbores that are less than 2-¼ inches in diameter. Included in this discussion are the challenges of developing the tools, the market, and the expectation of delivery of improved oil recovery chemicals utilizing a microhole.

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Section: Economicsmentioning

confidence: 99%

Selected U.S. Department of Energy’s EOR Technology Applications

Felber

2003

All Days

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Development of fiber-optical microsensors for geophysical use

Asanuma

Hashimoto

Tano

et al. 2003

2003 International Conference Physics and Control. Proceedings (Cat. No.03EX708)

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Technologies related to the Micro ElectroMechanical Systems (MEMS) has been remarkably progressed in this decade, and various kinds of microsensors have been developed using the MEMS technologies. Microsensors have a potential to drastically improve the geophysical instrumentation, because they have advantages in size, weight, sensitivity, mobility, and cost to the conventional sensors. Researchers in Graduate School of Environmental Studies, Tohoku University, Sendai, Japan, have been developing microsensors for geophysical use under the Subsurface Microsensing Project since 1993. The microsensors can be employed in wide area including geophysical exploration, logging, seismic observation, prevention of disaster, and evaluation of structural integrity etc.In this poster presentation, the authors show principles behind a miniaturized fiber-optic hydrophone and an optical accelerometer. A Fabri-Perot interferometer, which consists of a half mirror at the edge of optical fiber and a full mirror on diaphragm, is fabricated using the MEMS technologies for the detection of dynamic pressure in water and acceleration in both sensors. The design concept, fabrication process, performance and future development plan will be shown.

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