WELL SURVEYING METHOD Russian patent published in 2014 - IPC E21B47/103 

FIELD: oil and gas industry.

SUBSTANCE: to the well a package is run in that is equipped bottom-up from a funnel, a packer placed in the interval between the productive strata, a string of pipe with low heat conductivity with self-contained well instruments placed at external surface, an ejector for wells surveys and a casing string; the packer is set, the process is withheld in order to recover temperature conditions, water is pumped along the casing string through the ejector for well surveys and annular space, bottomhole pressure is decreased under the packer, inflow is induced from the lower productive stratum, the packer is broken, the package is lifted and interpretation is made for readings of the self-contained well instruments, at change of less than 0.4 of degree recorded by the self-contained well instruments conclusion is made on non-availability of circulation behind the string, at change of more than 0.4 of degree conclusion is made on availability of circulation behind the string.

EFFECT: determination of the behind-the-casing flows at downward flow of fluid behind the well.

1 dwg, 1 ex