A NEW MWD CONCEPT FOR GEOLOGICAL POSITIONING OF HORIZONTAL WELLS

Citation
Ei. Nakken et al., A NEW MWD CONCEPT FOR GEOLOGICAL POSITIONING OF HORIZONTAL WELLS, Journal of petroleum technology, 48(3), 1996, pp. 239-240
Citations number
NO
Categorie Soggetti
Energy & Fuels","Engineering, Chemical","Geosciences, Interdisciplinary","Engineering, Petroleum
ISSN journal
01492136
Volume
48
Issue
3
Year of publication
1996
Pages
239 - 240
Database
ISI
SICI code
0149-2136(1996)48:3<239:ANMCFG>2.0.ZU;2-7
Abstract
Precise well positioning is crucial to the success of drilling advance d horizontal and extended-reach wells. To overcome problems related to incorrect positioning of the well path because of uncertainties attac hed to directional surveys and seismic data, a new measurement-while-d rilling (MWD) concept fdr geological positioning has been developed. B y applying borehole acoustic reflection techniques, a direct measure o f the well position with respect to critical fluid contacts and strati graphic interfaces parallel to the well can be obtained. The radial de tection range has been extended from a few meters with current geostee ring tools to about 20 m. Theoretical analysis and tests with a full-s cale research prototype have demonstrated the feasibility of this tech nology.