Double water-storage-tank water injection system, water injection method and storage medium

Abstract

The invention discloses a double-water-storage-tank water injection system, a water injection method and a storage medium, and belongs to the technical field of oil field water injection. The double-water-storage-tank water injection system comprises a first water storage tank, a second water storage tank, a first plunger pump, a second plunger pump, a first water conveying pipeline, a second water conveying pipeline, a connecting pipeline, a first valve, a second valve, a third valve, a first flow meter and a second flow meter, and the connecting pipeline connects the first water conveying pipeline with the second water conveying pipeline. During normal water injection, the first water conveying pipeline and the second water conveying pipeline are opened, the connecting pipeline is closed, when the liquid level in the second water storage tank is too high, the connecting pipeline is opened, the first water conveying pipeline is closed, the second water conveying pipeline is kept opened, injected water in the second water storage tank enters the first plunger pump and the second plunger pump at the same time, and accordingly the liquid level height can be rapidly reduced. In addition, part of injected water is subjected to flow dividing through the first plunger pump, excessive injected water is prevented from being injected into an oil pool, and the effect of water injection development is improved.

Description

Technical field [0001] The invention relates to the technical field of oilfield water injection, in particular to a double water tank water injection system, a water injection method and a storage medium. Background technique [0002] For a block that includes both medium-porosity and medium-permeability reservoirs and low-porosity and low-permeability reservoirs, two independent-operating single-tank water injection systems are usually configured in the block. The medium permeability reservoir injects the oilfield sewage separated from the oilfield produced fluid, and the second set of single-tank water injection system injects unpolluted clean water into the low porosity and low permeability reservoir to match the injected water with the reservoir type and improve Water injection development effect. However, with the continuous development of water injection, the amount of oilfield sewage separated from the oilfield produced fluid has increased, and more oilfield sewage will e...

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Problems solved by technology

[0005] The embodiment of the present invention provides a water injection system with double water storage tanks, which can be used to solve the problem in the related art that when the liquid level of oilfield sewage in the water storage tank is too high and the liquid level is reduced by increasing the water injection volume, it may cause Accelerated formation of dominant seepage channels in the reservoir, which eventually leads to poor water injection development effect

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