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A kind of composite ionic water plugging and profile control agent for oilfield chemical oil recovery and preparation method thereof

A technology of chemical oil recovery and composite ions, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of short effective period and poor effect of production increase, and achieve strong shear resistance, simple preparation and good stability Effect

Active Publication Date: 2020-06-30
黑龙江益瑞化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In reservoirs with severe interlayer channeling, after profile control, subsequent injection fluid bypasses the plugging area and returns to the high-permeability layer, and the effective period of production stimulation is short and the effect is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The compound ionic water plugging and profile control agent for chemical oil recovery in oil field comprises the following raw materials in parts by weight: 4 parts of polymer, 1.2 parts of crosslinking agent, 0.15 part of stabilizer, 0.9 part of pH regulator and 950 parts of water.

[0054] The preparation monomer of the polymer is composed of acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, 1-vinyl-3-benzoyl-2-pyrrolidone, and the acrylamide, 2-propylene The molar ratio of amido-2-methylpropanesulfonic acid to 1-vinyl-3-benzoyl-2-pyrrolidone is 3:0.8:0.2.

[0055] The preparation method of described polymer is:

[0056] (1) Add 2-acrylamido-2-methylpropanesulfonic acid into a jar, dissolve it with an appropriate amount of deionized water, neutralize it with sodium hydroxide in an ice-water bath, adjust the pH value to 7.5, and stir slowly to make Dissolve it completely; accurately weigh acrylamide and dissolve it with an appropriate amount of deionized water; a...

Embodiment 2

[0064] The compound ionic water plugging and profile control agent for chemical oil recovery in oil field comprises the following raw materials in parts by weight: 4 parts of polymer, 1.2 parts of crosslinking agent, 0.15 part of stabilizer, 0.9 part of pH regulator and 950 parts of water.

[0065] The preparation monomer of the polymer is composed of acrylamide, sodium allyl sulfonate, 1-vinyl-3-benzoyl-2-pyrrolidone, and the acrylamide, sodium allyl sulfonate, 1-ethylene The molar ratio of base-3-benzoyl-2-pyrrolidone is 3:0.8:0.2.

[0066] The preparation method of described polymer is:

[0067] (1) Add allyl sodium sulfonate into a jar and dissolve it with an appropriate amount of deionized water; accurately weigh acrylamide and dissolve it with an appropriate amount of deionized water; dissolve 1-vinyl-3-benzoyl-2- Pyrrolidone was added to N,N-dimethylformamide to prepare a 20wt% solution; the above three solutions were mixed, and deionized water was added to make the to...

Embodiment 3

[0075] The composite ionic water plugging and profile control agent for chemical oil recovery in oilfields comprises the following raw materials in parts by weight: 4 parts of polymer, 1.2 parts of crosslinking agent, 0.15 part of stabilizer, 0.9 part of pH regulator and 950 parts of water.

[0076] The preparation monomer of the polymer is composed of acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, 1-vinyl-3-benzoyl-2-pyrrolidone, and the acrylamide, 2-propylene The molar ratio of amido-2-methylpropanesulfonic acid to 1-vinyl-3-benzoyl-2-pyrrolidone is 3:0.8:0.2.

[0077] The preparation method of described polymer is:

[0078](1) Add 2-acrylamido-2-methylpropanesulfonic acid into a jar, dissolve it with an appropriate amount of deionized water, neutralize it with sodium hydroxide in an ice-water bath, adjust the pH value to 7.5, and stir slowly to make Dissolve it completely; accurately weigh acrylamide and dissolve it with an appropriate amount of deionized water; a...

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PUM

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Abstract

The invention discloses a composite ion type water shutoff profile control agent for oilfield chemical oil recovery, and belongs to the technical field of profile control agents for oil recovery. Thecomposite ion type water shutoff profile control agent for oilfield chemical oil recovery comprises a polymer, a crosslinker, a coagulant, a stabilizer, a pH adjuster and water. The composite ion typewater shutoff profile control agent has the advantages of long gelling time, deep penetration into the deep part of the oil reservoir, high shutoff strength, high stability, good stability, strong shear resistance, long effective period, and slow movement to the deep part of the stratum, so the composite ion type water shutoff profile control agent can effectively plug macro-pores and cracks of the oil reservoir and produce dynamic sweeping effect in order to achieve the dual effects of profile control and oil displacement; a special chemical structure and a network structure in the polymer molecules make the polymer absorb water in a manner of combining physical absorption, chemical adsorption and network adsorption, so the composite ion type water shutoff profile control agent has verystrong water swelling ability; and the above characteristics are fully used and are combined with the change of the pressure field of the oil reservoir in deep profile control in order to achieve indepth drive fluid diversion and improve the sweep efficiency.

Description

technical field [0001] The invention belongs to the technical field of profile control agent for oil recovery, in particular, the invention relates to a compound ion water shutoff profile control agent for oil field chemical oil recovery and a preparation method thereof. Background technique [0002] Water flooding is a method of oilfield development commonly used in oilfields at home and abroad. In the process of water flooding, due to the heterogeneity of the oil layer and unfavorable mobility ratio and other factors, the swept volume of water and the oil washing efficiency are low, which ultimately leads to the low recovery degree of water flooding. When water is injected into formations with different permeability, its propulsion mode is also heterogeneous, which is mainly caused by the heterogeneity of formation permeability in the vertical direction, and the viscosity difference between oil and water will make this The phenomenon becomes more obvious. The final resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512C09K8/58
CPCC09K8/5083C09K8/512C09K8/58
Inventor 李瑞鹏李明星战薇伊
Owner 黑龙江益瑞化工有限公司