Block copolymer emulsification enhancement combination flooding composition and application thereof

A technology of block copolymer and compound flooding, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problem that crude oil cannot be extracted, and achieve the goal of increasing microscopic swept volume, improving oil displacement efficiency and low cost Effect

Inactive Publication Date: 2014-12-24
大连东方创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Taking Daqing Oilfield as an example, the recovery degree of water flooding is about 40%, and the recovery rate of ASP flooding is about 20%. In the oil reservoirs flooded by ASP flooding, about 40% of the crude oil remains in the reservoir For this part of the crude oil, the current technology cannot be extracted

Method used

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  • Block copolymer emulsification enhancement combination flooding composition and application thereof
  • Block copolymer emulsification enhancement combination flooding composition and application thereof
  • Block copolymer emulsification enhancement combination flooding composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Enhanced emulsified composite flooding composition:

[0037] (1) Polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer: ethylene oxide (122) propylene oxide (47) oxyethylene (122) block copolymer ( F98) (purchased by BASF Corporation).

[0038] (2) Nonionic surfactant: stearyl alcohol polyoxypropylene (5) polyoxyethylene (20) ether (provided by Tianjin University of Technology).

[0039] (3) Polymer: The water-soluble polymer is partially hydrolyzed polyacrylamide HPAM, produced by Daqing Refining and Chemical Company, with a molecular weight of 25 million.

[0040] (4) Sulfonate-type surfactant: Heavy alkylbenzene sulfonate is produced by Daqing Donghao Investment Co., Ltd.

[0041] Composition of enhanced emulsified composite flooding composition:

[0042]

[0043] The rest is water.

[0044] Enhanced emulsion composite flooding composition Bailey core flooding experiment:

[0045] The Bailey core flooding experiment was carried out in accordance w...

Embodiment 2

[0053] Composition of enhanced emulsified composite flooding composition:

[0054]

[0055]

[0056] The rest is water.

[0057] Enhanced emulsion composite flooding composition Bailey core flooding experiment:

[0058] The Bailey core flooding experiment was carried out in accordance with the Petroleum and Natural Gas Industry Standard SY / T6424-2000 of the People's Republic of China. The oil used in the experiment was simulated oil from Daqing No. 1 Plant, and the water used in the experiment was simulated water from Daqing No. 1 Plant. When the water flooding reaches 100% water cut, inject 0.7 times the pore volume (PV) of the enhanced emulsified composite flooding composition, and then carry out water flooding until the water cut reaches 100%.

[0059] The parameters of the Bailey core are shown in Table 3.

[0060] Table 3. Bailey core parameters for the composition experiment of Example 2

[0061]

[0062] The enhanced emulsified composite flooding compositio...

Embodiment 3

[0066] Composition of enhanced emulsified composite flooding composition:

[0067]

[0068] The rest is water.

[0069] Enhanced emulsion composite flooding composition Bailey core flooding experiment:

[0070] The Bailey core flooding experiment was carried out in accordance with the Petroleum and Natural Gas Industry Standard SY / T6424-2000 of the People's Republic of China. The oil used in the experiment was simulated oil from Daqing No. 1 Plant, and the water used in the experiment was simulated water from Daqing No. 1 Plant. When the water flooding reaches 100% water cut, inject 0.7 times the pore volume (PV) of the enhanced emulsified composite flooding composition, and then carry out water flooding until the water cut reaches 100%.

[0071] The parameters of the Bailey core are shown in Table 5.

[0072] Table 5. Bailey core parameters for the composition experiment of Example 3

[0073]

[0074] The enhanced emulsified composite flooding composition of Example...

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Abstract

The invention discloses a block copolymer emulsification enhancement combination flooding composition and an application thereof. The combination flooding composition comprises the following components in percentage by weight: 0.01%-0.5% of polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, 0.0%-0.5% of a nonionic surfactant, 0.05%-0.5% of polymer, 0.03%-0.5% of a sulfonate surfactant, 0.2%-1.5% of alkali and the balance of water. According to the combination flooding composition, the emulsification performance of polymer-surfactant-alkali three-compound combination flooding is enhanced, the purpose of relatively high oil recovery rate in comparison with that of three-compound combination flooding can be achieved, and an oil reservoir after polymer flooding also has a certain effect of increasing the oil recovery rate.

Description

technical field [0001] The invention relates to a block copolymer enhanced emulsification composite flooding composition and application thereof, belonging to the technical field of petroleum exploitation. Background technique [0002] Polymer-surfactant-alkali triple compound oil flooding technology, laboratory research and field tests have confirmed that it can increase oil recovery by more than 20%, and it has been industrialized in Canada, the United States, China's Daqing and Shengli oilfields. [0003] Taking Daqing Oilfield as an example, the recovery degree of water flooding is about 40%, and the recovery rate of ASP flooding is about 20%. In the oil reservoirs flooded by ASP flooding, about 40% of the crude oil remains in the reservoir Among them, the current technology for this part of crude oil cannot be extracted. [0004] In-depth research on polymer-surfactant-alkali ASP flooding theory and technology is the current research and development direction of combin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C09K8/584
CPCC09K8/584C09K8/588
Inventor 刘春德
Owner 大连东方创新科技有限公司
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