Enhanced jelly dispersion deep control and displacement agent suitable for low-permeability, high-temperature and high-salt reservoirs

A jelly dispersion, high-temperature and high-salt technology, which is applied in drilling compositions, chemical instruments and methods, etc., to achieve good deep migration capability, enhanced oil recovery, increased strength, and temperature and salt tolerance. Effect
CN106047324BActive Publication Date: 2018-12-21CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2018-12-21

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Abstract

The invention belongs to the field of oilfield chemistry, and in particular relates to an enhanced jelly dispersion deep control and displacement agent suitable for low-permeability, high-temperature and high-salt oil reservoirs. The enhanced jelly dispersion deep control and displacement agent suitable for low-permeability, high-temperature and high-salt reservoirs is composed of functional polymers, cross-linking agents, inorganic reinforcing agents, and water in the following mass fractions: functional polymers, with a mass concentration of 0.4 to 0.6 %; cross-linking agent mass concentration 0.4-0.8%; inorganic reinforcing agent, mass concentration 0.2-0.3%; the balance is water. The average particle size of the enhanced jelly dispersion deep control and displacement agent of the present invention is distributed from nanometer to micron level, can be used for deep control and displacement of low permeability reservoirs, has good deep migration ability, good profile improvement effect, and enhanced recovery factor The effect is remarkable; the deep control and displacement agent can be used for deep control and displacement operations in high-temperature and high-salt oil reservoirs. Effectively improve the formation profile, significantly increase the follow-up water flooding sweep coefficient, and further increase the recovery factor.
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Description

technical field

[0001] The invention belongs to the field of oilfield chemistry, and in particular relates to an enhanced jelly dispersion deep control and displacement agent suitable for low-permeability, high-temperature and high-salt oil reservoirs. technical background

[0002] Low-permeability reservoirs are of great significance in the development of reservoirs in my country. Among the proven reserves, low-permeability reservoirs account for about 2 / 3 of all reserves, and the development potential is huge. During the development of low-permeability reservoirs, problems such as the decline of crude oil production and the rise of comprehensive water cut generally occur. Therefore, it is of great significance to carry out deep control and flooding in low-permeability reservoirs and further enhance the recovery factor.

[0003] In conventional oil reservoirs, the most widely used deep control and displacement agent is weak polymer jelly. For example, CN104342099A provide...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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