China University of Petroleum

China University of Geosciences (beijing)

Oil and Gas Technology Research Institute, Petrochina Changqing Oilfield Company

Jiaping Tao

Caili Dai

Guang Zhao

Qing You

Yifei Liu

Jiaming Li

Pan Wang

Jichao Fang

Yahui Lv

Chenglin Gu

Mingwei Gao

Ping Yi

Haien Yang

Yuyang Li

Xue Yao

The present disclosure relates to a method for oil displacement using a dispersed particle gel-strengthened polymer ternary composite displacement system.

Method for oil displacement using dispersed particle gel-strengthened polymer ternary composite displacement system

The flow modifier particle composition contain a viscoelastic base agent, a selective solubilizer, a density modifier, a sweller, and an optional plasticizer, wherein based on the total weight of the flow modifier particle composition, the content of the viscoelastic base agent is 30-90 wt %, the content of the selective solubilizer is 3-30 wt %, the content of the density modifier is 0.1-30 wt %, the content of the sweller is 1-30%, and the content of the plasticizer is 0-10 wt %. The present invention further discloses a flow modifier, which contains the flow modifier particle composition and a carrying fluid that contains water and a surfactant. The present invention further discloses a preparation method of the flow modifier, and a use of the flow modifier and the flow modifier particle composition in exploitation of fracture-cave reservoirs.

Flow modifier particles, flow modifier, and preparation method and use thereof

The invention provides a modified graphite particle system for strengthening a polymer/binary/ternary composite oil displacement system. The modified graphite particle system comprises the following components: 1-5 parts by mass fraction dispersed graphite particles, 0.2-0.6 parts by mass fraction dispersant, 0.1-0.5 parts by mass fraction wettability modifier, and deionized water that accounts for the remaining content, based on 100 parts by total mass fraction of the components. In addition, the present invention also provides a preparation and a use of the modified graphite particle system for strengthening the polymer/binary/ternary composite oil displacement system. The modified graphite particle system for strengthening the polymer/binary/ternary composite oil displacement system can be used to improve mobility regulation ability and oil displacement efficiency in an injection stage, enhance injection pressure in a follow-up water displacement stage, and increase the oil displacement effect of the composite oil displacement system to the greatest extent.

Modified graphite particle system for strengthening polymer/binary/ternary composite oil displacement system and preparation and application thereof

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Qingdao, China

Jiaping Tao