Temperature-resistant and salt-resistant jelly dispersion nitrogen foam composite control and flooding system and its preparation method

Abstract

The invention belongs to the field of oilfield chemistry, and particularly relates to a thermal-resistance and salt-tolerance dispersed gel nitrogen foam composite profile control system. The thermal-resistance and salt-tolerance dispersed gel nitrogen foam composite profile control system comprises a gas phase and a liquid phase, wherein the gas phase is nitrogen, and the liquid phase comprises a foaming agent, a foam stabilizer and a liquid dosing water and the balance of water; the mass fraction of the foaming agent in the total mass of the liquid phase is 0.1% to 0.4%, the mass fraction of the foam stabilizer in the total mass of the liquid phase is 0.05% to 0.15%, and the sum of the mass fractions of the components is 100%; and the gas-liquid ratio of the gas phase to the liquid phase is controlled to be 3-5: 1. An adopted nanoscale or micron-sized dispersed gel has good foaming and foam stabilizing synergistic effect with a betaine ampholytic surfactant, the swept volume and displacement efficiency of the foam composite profile control system are improved to the maximum extent, the system can be resistant to the temperature of 130 DEG C, the total salinity of 17*104 mg / L, the calcium ions of 1.0*104 mg / L and the magnesium ions of 1.0*104 mg / L, and the profile control effect of a high temperature and high salt oil deposit can be improved to the maximum extent.

Description

technical field

[0001] The invention belongs to the field of oil field chemistry, and in particular relates to a phenolic resin jelly dispersion nitrogen foam composite control and drive system for high-temperature and high-salt oil reservoir deep control and drive and a preparation method thereof. Background technique

[0002] With the further exploration and development of conventional oil reservoirs, the oil layers are getting deeper and deeper, and the reservoir temperature and salinity are getting higher and higher. High temperature (>80℃), high salinity (>2.0×10 4 mg / L) oil reservoirs in Huabei Oilfield, Dagang Oilfield, Zhongyuan Oilfield, Tarim Oilfield and other oilfields have relatively large reserves, but these oilfields have entered the "double high" stage of high water cut and high recovery degree, and water flooding is inefficient or Ineffective circulation, resulting in a large amount of remaining oil remaining in the formation cannot be produced. There...

Examples

Embodiment 1

[0026] The temperature-resistant and salt-resistant jelly dispersion nitrogen foam compound control and flooding system includes: gas phase and liquid phase, the gas phase is nitrogen, and the liquid phase is foaming agent, foam stabilizer and liquid mixing water, of which: the gas-liquid phase of the gas phase and the liquid phase The ratio is controlled at 3:1, and the gas-liquid ratio is the ratio of nitrogen volume to liquid phase volume.

[0027] The liquid phase comprises: the mass fraction of the betaine type amphoteric surfactant foaming agent in the total liquid phase is 0.3%; the mass fraction of the phenolic resin jelly dispersion foam stabilizer in the liquid phase total mass is 0.1%; The amount is that the mass fraction of dosing water in the total mass of the liquid phase is 99.6%, and the sum of the mass fractions of each component is 100%.

[0028] Preparation method of phenolic resin jelly dispersion: at room temperature (20±5°C), add 0.2g of polymer to 98.9g ...

Embodiment 2

[0032] The temperature-resistant and salt-resistant jelly dispersion nitrogen foam composite flood control system includes: gas phase and liquid phase, the gas phase is nitrogen, and the liquid phase is betaine-type amphoteric surfactant foaming agent, phenolic resin jelly dispersion foam stabilizer and Mix liquid water, wherein: the gas-liquid ratio of the gas phase and the liquid phase is controlled at 5:1, and the gas-liquid ratio is the ratio of the volume of nitrogen gas to the volume of the liquid phase.

[0033] The liquid phase comprises: the mass fraction of the betaine type amphoteric surfactant foaming agent in the total liquid phase is 0.2%; the mass fraction of the phenolic resin jelly dispersion foam stabilizer in the liquid phase total mass is 0.05%; The amount is that the mass fraction of the dosing water in the total mass of the liquid phase is 99.75%, and the sum of the mass fractions of each component is 100%.

[0034] Preparation method of phenolic resin je...

Embodiment 3

[0038] The temperature-resistant and salt-resistant jelly dispersion nitrogen foam composite flood control system includes: gas phase and liquid phase, the gas phase is nitrogen, and the liquid phase is betaine-type amphoteric surfactant foaming agent, phenolic resin jelly dispersion foam stabilizer and Mix liquid water, wherein: the gas-liquid ratio of the gas phase and the liquid phase is controlled at 4:1, and the gas-liquid ratio is the ratio of the volume of nitrogen gas to the volume of the liquid phase.

[0039] The liquid phase comprises: the mass fraction of the betaine type amphoteric surfactant foaming agent in the total liquid phase is 0.4%; the mass fraction of the phenolic resin jelly dispersion foam stabilizer in the liquid phase total mass is 0.15%; The amount is that the mass fraction of the dosing water in the total mass of the liquid phase is 99.45%, and the sum of the mass fractions of each component is 100%.

[0040] Preparation method of phenolic resin je...

technical field

[0001] The invention belongs to the field of oil field chemistry, and in particular relates to a phenolic resin jelly dispersion nitrogen foam composite control and drive system for high-temperature and high-salt oil reservoir deep control and drive and a preparation method thereof. Background technique

[0002] With the further exploration and development of conventional oil reservoirs, the oil layers are getting deeper and deeper, and the reservoir temperature and salinity are getting higher and higher. High temperature (>80℃), high salinity (>2.0×10 4 mg / L) oil reservoirs in Huabei Oilfield, Dagang Oilfield, Zhongyuan Oilfield, Tarim Oilfield and other oilfields have relatively large reserves, but these oilfields have entered the "double high" stage of high water cut and high recovery degree, and water flooding is inefficient or Ineffective circulation, resulting in a large amount of remaining oil remaining in the formation cannot be produced. There...

Examples

Embodiment 1

[0026] The temperature-resistant and salt-resistant jelly dispersion nitrogen foam compound control and flooding system includes: gas phase and liquid phase, the gas phase is nitrogen, and the liquid phase is foaming agent, foam stabilizer and liquid mixing water, of which: the gas-liquid phase of the gas phase and the liquid phase The ratio is controlled at 3:1, and the gas-liquid ratio is the ratio of nitrogen volume to liquid phase volume.

[0027] The liquid phase comprises: the mass fraction of the betaine type amphoteric surfactant foaming agent in the total liquid phase is 0.3%; the mass fraction of the phenolic resin jelly dispersion foam stabilizer in the liquid phase total mass is 0.1%; The amount is that the mass fraction of dosing water in the total mass of the liquid phase is 99.6%, and the sum of the mass fractions of each component is 100%.

[0028] Preparation method of phenolic resin jelly dispersion: at room temperature (20±5°C), add 0.2g of polymer to 98.9g ...

Embodiment 2

[0032] The temperature-resistant and salt-resistant jelly dispersion nitrogen foam composite flood control system includes: gas phase and liquid phase, the gas phase is nitrogen, and the liquid phase is betaine-type amphoteric surfactant foaming agent, phenolic resin jelly dispersion foam stabilizer and Mix liquid water, wherein: the gas-liquid ratio of the gas phase and the liquid phase is controlled at 5:1, and the gas-liquid ratio is the ratio of the volume of nitrogen gas to the volume of the liquid phase.

[0033] The liquid phase comprises: the mass fraction of the betaine type amphoteric surfactant foaming agent in the total liquid phase is 0.2%; the mass fraction of the phenolic resin jelly dispersion foam stabilizer in the liquid phase total mass is 0.05%; The amount is that the mass fraction of the dosing water in the total mass of the liquid phase is 99.75%, and the sum of the mass fractions of each component is 100%.

[0034] Preparation method of phenolic resin je...

Embodiment 3

[0038] The temperature-resistant and salt-resistant jelly dispersion nitrogen foam composite flood control system includes: gas phase and liquid phase, the gas phase is nitrogen, and the liquid phase is betaine-type amphoteric surfactant foaming agent, phenolic resin jelly dispersion foam stabilizer and Mix liquid water, wherein: the gas-liquid ratio of the gas phase and the liquid phase is controlled at 4:1, and the gas-liquid ratio is the ratio of the volume of nitrogen gas to the volume of the liquid phase.

[0039] The liquid phase comprises: the mass fraction of the betaine type amphoteric surfactant foaming agent in the total liquid phase is 0.4%; the mass fraction of the phenolic resin jelly dispersion foam stabilizer in the liquid phase total mass is 0.15%; The amount is that the mass fraction of the dosing water in the total mass of the liquid phase is 99.45%, and the sum of the mass fractions of each component is 100%.

[0040] Preparation method of phenolic resin je...

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