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Diversified carbon-dioxide flooding oil extraction method

A carbon dioxide, oil reservoir technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve problems such as corrosion and poor oil displacement

Inactive Publication Date: 2014-02-05
PANJIN DAOBOER PETROLEUM NEW TECH DEV
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Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention proposes a multivariate carbon dioxide flooding oil recovery method, utilizing the CO in the associated gas produced by the recovered steam flooding wells to 2 , which not only realizes the utilization of waste gas, but also solves the problems of poor oil displacement and corrosion in the single carbon dioxide flooding technology existing in the prior art

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Embodiment Construction

[0025] The present invention will be described in further detail in conjunction with accompanying drawing

[0026] Take Huan 50 as an example:

[0027] Due to the strong vertical heterogeneity of the oil layers in the Huan 50 block, and the thin interlayers, the mechanical injection process cannot be adopted, and the medium and low permeability oil layers cannot be effectively developed. Oil is less effective. It is the best choice to use foam to improve sweep coefficient and oil displacement efficiency.

[0028] Construction technology and parameters:

[0029] 1. Construction equipment

[0030] (1) Liquid CO 2 Injection equipment: 3RC-125A-5.4 / 31.5 special liquid CO 2 Three plunger injection pump, rated displacement 5.4m 3 / h, rated discharge pressure 31.5MPa.

[0031] (2) Pull and transport liquid CO 2 Tanker: use professional hauling liquid CO 2 Tank truck (temperature resistance ≥ -30°C, pressure resistance ≤ 2.4MPa).

[0032] 2. Ground process design

[0033] I...

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Abstract

The invention relates to the technical field of oil extraction of oil fields, in particular to a diversified carbon-dioxide flooding oil extraction method. By adjusting parameters including minimum mixed-phase pressure, injection ratio, injection pressure, injection speed and the like of liquid carbon dioxide and water and utilizing alternative injection and flooding of the carbon dioxide and the water to perform crude oil extraction, the oil extraction speed and the recovery efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oilfields, in particular to a multiple carbon dioxide flooding oil recovery method. Background technique [0002] Carbon dioxide flooding has a research history of more than 50 years. The United States, Canada and other countries have done a lot of various research work. At present, it has become an effective method of enhancing oil recovery and has been widely used. However, at present, my country's carbon dioxide flooding has the following technical problems: most oil fields do not have carbon dioxide gas reservoirs, and the carbon dioxide used in oil fields mainly comes from by-products of related factories. It is unstable and cannot guarantee continuous and long-term use; a single carbon dioxide flooding technology cannot completely solve various contradictions in the development of complex reservoirs. The complexity of reservoir conditions in my country is mainly reflected in the high ...

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Application Information

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IPC IPC(8): E21B43/22
Inventor 关大义吕洪延张兴中王福斌周闯谢永佳崔强
Owner PANJIN DAOBOER PETROLEUM NEW TECH DEV
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