METHOD OF TESTING AND CONVERSION OF FLUID-SATURATED FRACTURE RESERVOIR BED (VARIANTS) Russian patent published in 2018 - IPC E21B43/25 E21B43/02 

FIELD: building; hydraulic engineering.

SUBSTANCE: group of inventions refers to the technology of deep hole construction and, in particular, to downhole methods of testing and/or conversion of productive fluid-developing fracture reservoir beds with reservoir pressure of the fluid system from anomalously low to anomalously high. By way of the well, characterized by the presence of a natural carbonate fluid-saturated fracture reservoir bed with natural cracks, the assembly with a hydromechanical packer is lowered. Perform an intake rate test of the fracture filtration system. Pressure of the opening of natural cracks is determined. Perform the procedure of fixing the filtering-permeable cracks in the bottom-hole zone of the fluid-saturated reservoir with slow injection of proppant. Injection is carried out at a rate of 5–10l/sec and with the use of stable proppant of three fractions: fine 0.21–0.42mm, average 0.42–0.85mm, coarse 0.85–1.7mm. Fractions are selected based on the results of the core analysis and with a pressure increase of 1.5–2.5MPa of reservoir pressure. Then, the bottomhole pressure is reduced to the reservoir pressure and proceeds to creating a depression on the formation and cleaning the well. After this, hydrodynamic studies of the fluid-saturated reservoir-collector in the open wellbore are carried out. Studies are carried out by the method of steady selection according to the standard nipple program with the creation of depressions from the value of the formation pressure on the fluid system in the prescribed modes. Choose the mode of subsequent exploitation – depression, and development of the well with the extraction of liquid and gaseous minerals.

EFFECT: technical result is an increase in the efficiency of processing the fluid-developing fracture reservoir bed.

3 cl