Cnpc Engineering Technology R&d Company Limited

Petrochina Company Limited

China National Petroleum Corporation

Hongfei Ji

Ming Xu

Wei Liu

Chi Zhang

Yong Ma

Hua Zhang

Jianzhou Jin

Yongjin Yu

Youzhi Zheng

Hong Yue

Yuchao Guo

Zishuai Liu

Shuoqiong Liu

Fengzhong Qi

Congfeng Qu

Wei Li

Lili Chen

Jianhua Guo

Rui Zheng

Zhiwei Ding

Chongfeng Zhou

Yusi Feng

Zhaohui Wang

Jinping Yuan

Shunping Zhang

Bin Lyu

Xiaobing Zhang

Youcheng Zheng

Feng Zhou

Chengquan Li

Xiujian Xia

Jiyun Shen

Huiting Liu

Zhao Huang

Yong Li

Jiliang Liu

The present disclosure relates to the technical field of oil and gas field exploitation, in particular to an early strength material suitable for a cement slurry system, a cement slurry composition, a cement slurry system, a preparation method therefor and the use thereof. The early strength material contains an aluminum salt, a sodium salt, crystal whiskers, an inorganic mineral and dispersing agent I, wherein the weight ratio of the aluminum salt, the sodium salt, the crystal whiskers, the inorganic mineral and dispersing agent I is (1-3):(1-3):(1-4):(1-8):1. The early strength material provided by the present invention has both high-temperature retarding performance and low-temperature early strength performance; meanwhile, while satisfying well cementing, the cement slurry system prepared from the cement slurry composition containing the early strength material can prolong thickening time of cement slurry under a high-temperature condition, can prevent ultra-retarding of top cement slurry under a low-temperature condition and has increased early strength.

Cement slurry system, preparation method therefor and use thereof

A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.

Well cementing method for improving well cementing quality by controlling hydration heat of cement slurry

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Beijing, China

Hongfei Ji