METHOD OF ISOBARIC MAPPING OF ZONE-NONHOMOGENEOUS PRODUCTIVE FORMATION Russian patent published in 2011 - IPC E21B47/06 E21B49/00 

FIELD: mining.

SUBSTANCE: there determined is permeability of productive formation, its porosity, thickness, water content, viscosities of saturating fluid and displacement agent, as well as values of their phase permeabilities. Data on process operating modes of all wells during the whole operating period of minefield is gathered. Prior to pressure measurements there determined are productivity factors of all wells of general totality. Wells for carrying out pressure measurements are chosen on the basis of representation criterion, as well as on the basis of maximum uniformity of arrangement of wells of sampling along surface area of productive formation. At that, representation criterion is based on variation coefficient and distribution of productivity factor in wells of general totality, which characterise zone non-homogeneity of productive formation. Pressure measurements in wells of representative sampling are carried out at one and the same time and at least once a day. Filtration process of formation fluid is simulated, and isobaric map is built on the basis of data of mathematical simulation.

EFFECT: improving accuracy of isobaric mapping of productive formation in case of its zone non-homogeneity.

7 dwg