METHOD FOR HYDRODYNAMIC DIAGNOSTICS OF OPEN HOLE OF WELL UNDER CONSTRUCTION Russian patent published in 2023 - IPC E21B47/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the methods for hydrodynamic examination of a wellbore during the drilling process. A method for hydrodynamic diagnostics of an open wellbore under construction includes determining the injectivity coefficient of its walls by injecting flushing fluid into the well while controlling the pressure and fluid flow rate in the well-rock system. Determination and registration of the injectivity coefficient of the well walls is carried out during continuous mechanical drilling, without stopping to examine the well and without a packer, obtaining graphical and digital data of the injectivity coefficient of the well walls and the dependence of the flow rate of fluid pumped into the well from pressure in real time, by dividing the wellbore wells into micro-intervals, in which the flushing parameters and depth change slightly compared to the length of the well, and taking into account micro-changes in the injectivity coefficient when passing through the next such micro-interval. The microchange in the injectivity coefficient during the passage of the next such microinterval is calculated using certain dependencies. Complete and reliable data on absorbent formations and the hydrodynamic characteristics of the wellbore under construction are received, the success rate is increased and the time and money spent for these works are reduced.

EFFECT: improving the quality, reliability and durability of the well, therefore, an increase in its operational capabilities and an increase in production are expected.

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