Oil-water well original production string acidizing technology system

Abstract

The invention discloses an oil-water well original production string acidizing technology system. The oil-water well original production string acidizing technology system comprises a pumping device, an acidizing fluid storing device, an active water storing device, and a fluid swabbing device. In the acidizing field construction program, an acidizing fluid system is injected into an annular area between an oil pipe and a casing pipe. In the acidizing field construction program, the string does not need to be removed, under the condition that the original production string keeps stationary, and acidizing fluid is directly injected into the stratum through the annular area of between the oil pipe and the casing pipe. The oil-water well original production string acidizing technology system is characterized in that string removing, pump hanging and acidizing operation processes are saved, the operation cost is reduced, and the well occupation period of the oil well acidizing operation process is shortened. Furthermore, because the string is not moved, pollution brought by the workover operation to the reservoir is reduced to some extent.

Description

technical field [0001] The invention relates to the technical field of increasing production of oil-water wells in old oilfields, in particular to the technical field of acidification transformation of old oilfield reservoirs. Background technique [0002] Acidizing is a widely used oil and gas layer stimulation measure to relieve damage in the near-well zone of the oil well. The main principle is to inject an acid system into the formation of the perforated section through the downhole pipe string, and chemically react with the organic blockage in the formation and the perforated section. , thereby removing clogging, improving oil and gas seepage capacity, increasing production of oil wells, and increasing injection of water wells. The general acidizing method is active string acidizing, that is, after pulling out the original string in the well, and then lowering it into a special acidizing string to inject acid liquid; . [0003] With the continuous production of oil we...

AI Technical Summary

Problems solved by technology

This process not only greatly prolongs the acidizing construction period, but also increases the cost of construction operations. In addition, the moving string must be washed. Pollution

If the original construction process system is used and the acidizing string is directly entered into the construction process without replacing the acidizing string, it will cause different degrees of acid corrosion damage to the production string and affect the service life of the string equipment

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