Polymer-surfactant solution ground injection system applicable to mine field and its injection method

Abstract

The invention provides a polymer-surfactant solution ground injection system applicable to mine field and its injection method. The polymer-surfactant solution ground injection system comprises at least two mixing tanks, a curing tank, and a fluid storage tank; the inner cavities of the mixing tanks are divided into a mixing room and a junction room by a middle board, and the top parts of the mixing tanks are equipped with vacuumizing devices connected to the mixing rooms; a check valve is arranged at the through hole of the bottom part of the middle plate, and the top part of the mixing roomis provided with a first fluid inlet; the bottom part of the junction room is provided with a first fluid outlet and a first sampling opening; the inner cavity of the curing tank is separated into atleast two curing rooms along the circumference, a second fluid inlet is arranged on the side wall of the curing tank corresponding to every curing room, and the bottom part corresponding to every curing room is provided with a second sampling opening and a second fluid outlet; the inner cavity of the fluid storage tank is separated to be at least two fluid storage rooms along the circumferential direction, and a third fluid inlet is arranged on the side wall corresponding to every fluid storage room; the bottom part corresponding to every fluid storage room is provided with a third sampling opening and a third fluid outlet.

Description

technical field [0001] The invention belongs to the field of petroleum exploitation, and in particular relates to a surface-polymerizing agent solution ground injection system suitable for mines and an injection method thereof. Background technique [0002] As a new type of oil displacement agent, polymer surface agent has dual characteristics of polymer and surfactant, and has great potential for further enhancing oil recovery in high water-cut oilfields or low-permeability oilfields. At present, polymer preparation equipment is used for the injection of polysurfactants. The same concentration of polysurfactants has higher viscosity, more bubbles are generated during the preparation process, and it is not easy to defoam. If injected underground, it will have adverse effects. In addition, the curing time of surface-polymerizing agents is longer than that of polymers. Different surface-polymerizing agents require different curing times. How to realize the diversification of c...

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Problems solved by technology

However, these methods have certain limitations for the treatment of multi-bubbles, and are less involved in the defoaming field of the polymer surface agent solution, which cannot meet the diverse needs of the mine for the various polysurface agent curing times.

[0004] Aiming at the problem of curing time, the existing technology mainly saves curing time by optimizing the curing tank, but most of the existing structures are inconvenient to maintain, and are designed for a single polymer, which is not suitable for the defoaming of the polysurfactant solution and cannot meet the needs of the site. diverse requirements

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