SU935601A1 - Method for completing water well - Google Patents

Description

t

The invention relates to the mining industry and can be used for the development of wells for water.

A known method of developing a well for water by creating an airlift in the well P1. The disadvantage of this method is the low efficiency of cleaning the bottom-hole formation zone.

Closest to the present invention is a method for developing a well for water, including the simultaneous creation of airlift and hydraulic impulses in the filter zone of formation 2.

The disadvantage of this method is the low efficiency of well development at high dynamic level conditions in the well.

The purpose of the invention is to increase the efficiency of the development of a water well under the conditions of a high dynamic fluid level in a well.

This goal is achieved by the fact that in the method of developing a well for water,

including the simultaneous creation of an airlift in the well and hydraulic impulses in the near-filter zone of the formation, hydraulic impulses are created by continuously pumping fluid into the annular space of the well and periodically blocking the flow of this fluid to the bottom of the well.

FIG. 1 shows an apparatus for carrying out the method; in fig. 2 10 option to shut off the pumped-out flow from deep wells.

This device (FIG. 1) contains water lifting pipes 1, tubing pipes 2 (both

15 are included in the standard airlift kit and are used without modification), a sealer (packer, gland) 3. PRI me R. In the well mount airlift (pipes 1 and 2) for any

Claims (2)

20 pattern. Seal the space between the casing and water lifting pipes. Create airlift in the well and inject flushing fluid through the annulus i into the well. Then block the access of the liquid in the water-lifting pipes 1, installing them on the bottom, which creates a hydraulic shock. Immediately after the hydraulic impact, the fluid injected into the well, being in a closed volume, is injected into the reservoir. The injection of fluid into the reservoir (the duration of the injection pulse) occurs until the water-lifting pipes are not raised above the bottom. In the figure, the solid arrows show the direction of fluid movement in the filter zone during normal operation of the gun. Dotted lines indicate the direction of fluid movement when the airlift is overlapped. As a result of the water hammer and the injection pulse, the weakest bonds of the particles composing the filter zone are destroyed. Separated particles enter the well, and then (after lifting the lifting pipes 1) the flow of pumped liquid is carried to the surface. The flow shut-off cycle --Repeat until the content of mechanical impurities in the pumped liquid reaches 20-25. After that, pumping continues for some time in the usual way, i.e. without hydraulic impulses. As the impurity content in the pumped liquid decreases, it is restored to the initial one (20-25). This cycle is repeated until the maximum well flow rate is reached. In the case shown in FIG. 2, only pipes 2 are raised and lowered, since the length of the water-lifting pipes does not allow them to be placed on the bottom. The frequency of the generated hydropercussion pulses depends on the specific conditions (filter frame, composition of water-bearing rocks, thickness of the productive formation, etc.) and is approximately 5–20 per minute (less at the beginning, and more). Thus, the higher the dynamic level is raised (the higher the flow rate of fluid is injected), the more powerful the water hammer and the more efficient: a high discharge pulse. The application of the proposed method allows to reduce the time of development and significantly increase the flow rates of wells. The invention method of water well development, including the simultaneous creation of airlift in the well and hydraulic impulses in the filter area of the sheet, characterized in that, in order to increase the efficiency of well development in conditions of high dynamic fluid level in the well, hydraulic impulses are created by constant injection fluids into the annulus of the well and periodically shut off the flow of this fluid to the bottom of the well. Sources of information taken into account in the examination 1.Technika and technologists of exploration, production organization. VIEMS, M., 1976, p. 28 2. USSR author's certificate number 26201 2, cl. E 21 B, 1970.