METHOD FOR DETERMINING ANISOTROPY PERMEABILITY OF ROCKS Russian patent published in 2021 - IPC E21B47/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, namely to the information support of projects for the development of oil and gas deposits. Proposed is a method that includes conducting hydrodynamic studies of wells, determining vertical and horizontal permeability. According to the data of hydrodynamic studies of wells, two graphs of the dependence of the bottom-hole pressure on the logarithm of time in the coordinates “P_bh(t)-lg(t)” and “P_bh(t)-1/t^0.5” are constructed, rectilinear sections are allocated on the constructed graphs and the slope angles B and S are determined, and the final rectilinear section is allocated on the graph of the dependence “P_bh(t)-lg(t)”, a rectilinear section is allocated on the graph “P_bh(t)-1/t^0.5” in such a way that the time corresponding to its end was less than the time corresponding to the beginning of the rectilinear section in the coordinates “P_bh(t)-lg(t)”, further, the total thickness of the reservoir (h) is calculated from the known working thickness h_w, the values B and S, the time coordinates of the last point of the straight line (t), constructed in the coordinates “P_bh(t)-1/t^0.5”.

EFFECT: increasing reliability and integrity of determining the permeability anisotropy of the productive reservoir according to the hydrodynamic studies of wells.

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