China Petroleum & Chemical Corporation

Petroleum Engineering Research Institute, Sinopec

Qichun Wang

Wei Liu

Fan Yang

Xu Wang

Hongwen Liang

Xuepeng Liu

Qian Tao

Xiaojun Mo

Shidong Ding

Junhua Zhang

Min Zeng

Gewei Peng

Hailiang Zhang

Shiming Zhou

Described are a self-healing composition, and a preparation method for and an application of the composition. The composition is of a core-shell structure; the core contains a hydrogenated styrenic thermoplastic elastomer polymer and an inorganic filler; the shell contains a hydrophilic polymer; the composition has a density of 1.2-2 g/cm, a water contact angle of no more than 90°, and a diesel oil and/or natural gas absorption expansion ratio of 5-15 times. By coating the hydrogenated styrenic thermoplastic elastomer and the inorganic filler with the hydrophilic (surface polarized) polymer, a core-shell structure is formed. When the composition is used for well cementing in an oil/gas field, the composition has a density and compatibility matching cement mortar and thus can form a uniform and stable cement slurry for well cementing in the oil/gas field, and has excellent oil/gas absorption expansion performance and thus can expand after absorbing oil/gas to perform self-healing.

Composition, preparation method for and application of composition, and self-healing method for well cementing in oil/gas field

A multiphase particle has a multiphase structure comprising a first phase and a second phase and has an average particle size of 0.1-100 mm. The multiphase particle has a high bulk strength and a good interface binding power with the hardened cement and is particularly suitable for the toughening application of the hardened cement.

Multiphase particle, manufacturing process and use thereof

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Beijing, China

Qichun Wang