Water-gathering co-well layering co-charging process tubular column

Abstract

The invention relates to a water-gathering co-well layering co-charging process tubular column, which mainly solves the problem that the oil field injection well exploitation way of the existing oil field process tubular column severely influences the yield of the oil field and is violently subjected to the influence of the thickness of an isolation layer. The water-gathering co-well layering co-charging process tubular column is characterized in that an annular space between a casing pipe (1) and an outer layer oil pipe (2) is divided by a plurality of washable well-passing cable packers (10) into different positions, an inner layer oil pipe (3) is arranged inside the outer layer oil pipe (2), the an insertion sealing device (5) is arranged between the bottom end of the inner layer oil pipe (3) and the outer layer oil pipe (2), an eccentric injector (4) is arranged in the position on the upper part of the insertion sealing device (5), and an eccentric water allocator (6) is arranged in the position on the lower part of the insertion sealing device (5). By adopting the water-gathering co-well layering co-charging process tubular column, the co-well subsequent water flooding and polymer flooding can be simultaneously carried out after the polymer flooding upward movement is realized, both the water flooding and the polymer flooding are respectively injected in a layering manner, the exploitation effect is improved, and the influence of the thickness of the isolation layer can be avoided.

Description

technical field [0001] The invention relates to the field of oil fields, in particular to a water accumulation and co-well delamination and co-injection process string. Background technique [0002] Due to the limitation of the structure of the oilfield process string, after the polymer injection in the oil layer that has been injected, the polymer injection well will return and seal the oil layer where the injection has been completed, and inject the upper undeveloped oil layer to continue the injection and production. . However, this development mode has a greater impact on the production of the oilfield, which will reduce the contribution of subsequent water flooding to the production of the oilfield, and this development mode is greatly affected by the thickness of the interlayer. Contents of the invention [0003] In order to overcome the disadvantages that the oilfield polymer injection well production method using the existing oilfield process string has a great i...

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Problems solved by technology

However, this development mode has a greater impact on the production of the oilfield, which will reduce the contribution of subsequent water flooding to the production of the oilfield, and this development mode is greatly affected by the thickness of the interlayer

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