METHOD OF DEFINING PRESSURE IN INTERWELL SPACE Russian patent published in 2012 - IPC E21B47/06 G01V7/00 

FIELD: oil and gas production.

SUBSTANCE: proposed method comprises measuring gravitational field at well locations and bed pressure at well bottom, revealing dependence between said magnitudes, measuring gravitational field at earth surface in interwell space zone and defining bed pressure in said zone from derived dependencies. In the case of gas deposits, bed pressure at external boundary of reservoir in interwell space zone is defined by special equation. Note here that factors in said equation are defined from dependencies obtained experimentally for well locations between gravitational field variation during deposit development monitoring, bed pressure variation and difference between gravity difference between adjacent sets of measurements. In the case of oil deposits, bed pressure at external boundary of reservoir is defined from another special equation. Note here that factors in this equation are defined from dependencies obtained at well locations on total volume of hydrocarbons extracted from well for time t at total yield q.

EFFECT: higher accuracy and reliability.

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