METHOD FOR HORIZONTAL WELL BORE DRILLING ON THE BASE OF GEOLOGICAL INVESTIGATIONS Russian patent published in 2007 - IPC E21B47/22 G01C19/00 

FIELD: well drilling, particularly to provide designed well bore position on the base of geological investigations of drilled rock.

SUBSTANCE: method involves receiving information concerning drilling tool location from well bottom by means of land-based instruments; taking rock drilled out from well bottom after receiving of data by well operation investigations, directional survey and gamma-ray logging; performing geological-petrophysical and lithofacies drilled-out rock analysis; tabulating said analysis results to obtain lithologic-and-petrographic parameter and facies property table; plotting correlation scheme of lithologic-and-facies cut condition referenced to vertical depths with marking the most oil and gas advantageous intervals; controlling well bore path in productive bed to provide drilling tool movement through productive bed. Complex geological-petrophysical and lithofacies drilled out rock analysis includes macro description of rock under binocular, carbonate metering, luminescent-bituminological analysis, documentary photographing referred to vertical depths in white light and ultra-violet radiation; thermal vacuum degassing, petrophysical parameter, namely porosity, mineralogical and volumetric density investigation and determination of oil or gas content in drilled out rock with the use of liquid distillation apparatus.

EFFECT: increased reliability and minuteness of geological information obtained at horizontal well bore bottom and improved accuracy of well navigation by drilling tool directing relatively reservoir bottom and roof.

2 cl, 2 dwg, 1 ex