FIELD: testing wells; intensifying oil and gas inflows.
SUBSTANCE: method for testing wells and intensifying oil and gas inflows and a jet pump for its implementation. Packer with a jet pump is lowered into the well on a tubing string. The packer is activated above the top of the reservoir. An acid solution is fed into the productive formation through the passage channel and the sealing sleeve. A depression insert is lowered into the tubing string. Under pressure, the working fluid is fed into the tubing string. The working fluid is supplied through the annulus and the reaction products of the acid solution are taken from the formation. Pressure is equalized above and below the depression insert. The depression insert is removed. A geophysical instrument and a sealing unit are lowered through the tubing string on a cable. Background recording is conducted. Working fluid is supplied under pressure through the annulus. The inflow profile is recorded. The flow of working fluid into the annulus is stopped. The sealing assembly and the geophysical instrument are removed. The packer is deactivated, and the jet pump is removed.
EFFECT: creating a method for geophysical exploration of wells, which cleans the well environment and uses a jet pump, with a reduced accident rate when working in difficult conditions in a partially cased or contaminated well.
10 cl, 7 dwg
