China National Petroleum Corporation

Cnpc Engineering Technology R&d Company Limited

Beijing Huamei Inc Cnpc

Shunping Zhang

Lili Chen

Ming Xu

Wei Liu

Chi Zhang

Yong Ma

Hua Zhang

Yongjin Yu

Jianzhou Jin

Shuoqiong Liu

Zishuai Liu

Yuchao Guo

Youzhi Zheng

Fengzhong Qi

Congfeng Qu

Xiaobing Zhang

Wei Li

Jianhua Guo

Yao Wang

Rui Zheng

Zhiwei Ding

Chongfeng Zhou

Hong Yue

Qin Han

Zhaohui Wang

Bin Lyu

Hongfei Ji

Yusi Feng

Pu Xu

Fuchen Liu

Jiwei Jiang

Jiaying Zhang

Haizhi Zhang

Guifu Wang

Chenyang Zhou

Songbing Yan

Yiliu Sun

Youcheng Zheng

Chengquan Li

Feng Zhou

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

An ultra-high temperature resistant cement slurry system comprising cement, an ultra-high temperature strength stabilizer, an ultra-high temperature reinforcing material, a density regulator, an ultra-high temperature suspension stabilizer, a dispersant, a fluid loss additive, a retarder, a defoaming agent and water, wherein the ultra-high temperature suspension stabilizer comprises an ether-based starch, an aluminosilicate and a polyalcohol polymer. The method for preparing the cement slurry system includes dry mixing and wet mixing raw materials homogeneously, respectively, and then homogeneously mixing the dry mix and wet mix to obtain the cement slurry system. The cement slurry system can be used for cementing in deep wells and ultra-deep wells at high and ultra-high temperatures.

Ultra-high temperature resistant cement slurry system for cementing and preparation method and use thereof

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Beijing, China

Shunping Zhang