Proportion regulating and injecting system

Abstract

The intention discloses a proportion regulating and injecting system which comprises a pressure pump, a plurality of pump heads are arranged on the pressure pump, each pump head corresponds to an injection well, is provided with a flux regulating mechanism which can control the flux of chemical agent solution, is independently communicated with a high-pressure valve group pipeline which can transport and monitor the state of the chemical agent solution, the output end of the high-pressure valve group pipeline is connected with a high-pressure water pipeline, and an output port of the high-pressure valve group pipeline is communicated with a static mixer; the chemical agent solution is diluted by water according to a set proportion; after diluent is further evenly mixed in the static mixer, the diluent is injected into an injection well. The invention directly completes the flow regulation of the chemical agent solution through the output of the pressure head, cancels a link that the chemical agent solution is regulated by valves to realize the flow distribution in the original one-pump multiple-well technology, simplifies the one-pump multiple-well technology, saves oil-field chemical area ground investment and reduces viscosity loose of the chemical agent solution of the injection link.

Description

technical field [0001] The invention relates to the field of chemical flooding in petroleum production, in particular to a proportional regulation injection system. Background technique [0002] In order to increase oil production in oilfields, chemical flooding technology has become a key technology in the process of oilfield exploitation. figure 1 Shown is the current mature chemical flooding injection system, which adopts the "one pump multi-well" injection process. The chemical agent solution injected into the ground is from the storage tank to the injection wellhead. All links in the process produce polyacrylamide contained in the chemical agent solution. A certain degree of degradation, the total viscosity loss is about 20%. In this system, the chemical agent solution containing polyacrylamide is boosted by the booster pump, discharged from a discharge port, and then passed through the manifold and each branch pipeline respectively. Guide each single well, because the...

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Problems solved by technology

[0002] In order to increase oil production in oilfields, chemical flooding technology has become a key technology in the process of oilfield exploitation. figure 1 Shown is the current mature chemical flooding injection system, which adopts the "one pump multi-well" injection process. The chemical agent solution injected into the ground is from the storage tank to the injection wellhead. All links in the process produce polyacrylamide contained in the chemical agent solution. A certain degree of degradation, the total viscosity loss is about 20%. In this system, the chemical agent solution containing polyacrylamide is boosted by the booster pump, discharged from a discharge port, and then passed through the manifold and each branch pipeline respectively. Guide each single well, because the actual injection pressure of each single well is different, so in order to meet the requirement that the chemical agent solution containing polyacrylamide can be effectively injected into each single well, the output pressure of the booster pump must not be less than the highest single well pressure, For a single well with a small well pressure, excessive pressure drop will cause the viscosity loss of the chemical agent solution containing polyacrylamide. The viscosity loss is the largest, and its viscosity loss can reach 10%-15%. For a single well with a large pressure difference, the viscosity loss of the chemical agent solution containing polyacrylamide even greatly exceeds the oilfield injection index, which has a great impact on the injection quality

This kind of injection system, due to the mutual interference between multiple wells, its process is complicated, the control system is complicated, the operation is inconvenient, the investment is large, and the adjustment of the chemical agent solution is complicated. During the working process, the chemical agent solution fluctuates greatly, which makes the system run unstable

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