Stimulation of Formations with Jet Pumps


The technological process essence consists in lowering a well treatment device (jet pump) UOS-1 into a well tubing at the predetermined depth. A packer is installed under the device intended for exclusion of a working fluid column influence on a productive horizon at its operation. In pumping working fluids under calculated pressure through tubing and through the jet pump by a pumping assembly at the cost of ejection effect, the defined drop of hydrostatic pressure (depression) is created in the zone of productive horizon. After interruption of the working fluid feed, the disk valve comes into action and the bottom-hole pressure build-up curve (PBC) is registered. Further the cycle may be repeated for many times in creation of different depressions.

In the result of cycling influence on a bed at the depression-PBC mode, the borehole critical area cleaning is performed and step by step filling of a well by formation fluids is occurred.

An assembly with UOS-1 means the possibility of realization of inflow intensification (salt-acid or micellae treatment) prior to cycle influence on a bed ...