Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Elastic cement paste and preparation method thereof
The invention relates to the technical field of oil well cement paste, in particular to elastic cement paste and a preparation method thereof. The elastic cement paste is prepared from oil well cement paste and elastic materials, wherein the mass of the elastic materials is 3-40% that of cement in the oil well cement paste. Compared with corresponding oil well cement paste, the Young modulus of the obtained elastic cement paste is greatly lowered, and the strength of extension of the obtained elastic cement paste is greatly improved. By adopting the elastic cement paste for carrying out well cementing operation, the problem that microcracks are produced inside set cement and/or micro annular clearances are produced on a cement-formation interface in the trial production processes such as oil gas well follow-up perforation and multi-stage large fracturing due to the inherent brittleness of the set cement is effectively solved. It is shown that the elastic materials can significantly improve the capacity of resisting of set cement for resisting external force deformation, the Young modulus of the set cement is lowered, the strength of extension of the set cement is improved, annulus breakthrough flow is reduced, and the requirement for perforation and multi-stage large-scale fracturing production can be met.
Elastic cement paste and preparation method thereof
The invention relates to the technical field of oil well cement paste, in particular to elastic cement paste and a preparation method thereof. The elastic cement paste is prepared from oil well cement paste and elastic materials, wherein the mass of the elastic materials is 3-40% that of cement in the oil well cement paste. Compared with corresponding oil well cement paste, the Young modulus of the obtained elastic cement paste is greatly lowered, and the strength of extension of the obtained elastic cement paste is greatly improved. By adopting the elastic cement paste for carrying out well cementing operation, the problem that microcracks are produced inside set cement and/or micro annular clearances are produced on a cement-formation interface in the trial production processes such as oil gas well follow-up perforation and multi-stage large fracturing due to the inherent brittleness of the set cement is effectively solved. It is shown that the elastic materials can significantly improve the capacity of resisting of set cement for resisting external force deformation, the Young modulus of the set cement is lowered, the strength of extension of the set cement is improved, annulus breakthrough flow is reduced, and the requirement for perforation and multi-stage large-scale fracturing production can be met.
Elastic cement paste and preparation method thereof
LI LIANGBING (Autor:in) / ZHENG YONGSHENG (Autor:in) / WANG YUN (Autor:in) / XU JIAYI (Autor:in) / LI BOYANG (Autor:in) / PEI XUEFENG (Autor:in)
20.01.2016
Patent
Elektronische Ressource
Englisch
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