Methods and systems for reservoir characterization of the subterranean formation with the already existing cracks

摘要

FIELD: oil and gas production.;SUBSTANCE: layer of underground reservoir is isolated. Fluid is pumped into the underground reservoir at pressure exceeding pressure of reservoir fracturing. A borehole of the well is cut off during well shut-down. Data of pressure drop are measured from the side of the underground reservoir during time of pumping and during shut-down period in the well. Data on pressure drop are analysed by means of quantitative diagnostic model of a section where repeated reservoir fracture is possible; there is determined water permeability of an underground reservoir layer. There is also determined quantitative water permeability of field installations by a comparison point before closure of a fissure or by a comparison point by mathematic dependencies upon closure of a fissure. Also, pumped fluid is compressed, and the collector retains weakly compressed or compressed fluid.;EFFECT: upgraded accuracy in analysis of reservoir properties.;14 cl, 13 dwg