Cnpc Engineering Technology R&d Company Limited

China National Petroleum Corporation

Petrochina Company Limited

Beijing Huamei Inc Cnpc

Congfeng Qu

Ming Xu

Wei Liu

Chi Zhang

Yong Ma

Hua Zhang

Jianzhou Jin

Yongjin Yu

Youzhi Zheng

Yuchao Guo

Zishuai Liu

Shuoqiong Liu

Fengzhong Qi

Lili Chen

Zhiwei Ding

Hong Yue

Chongfeng Zhou

Yusi Feng

Xiaobing Zhang

Bin Lyu

Hongfei Ji

Shunping Zhang

Wei Li

Jianhua Guo

Yao Wang

Rui Zheng

Qin Han

Zhaohui Wang

Fuchen Liu

Pu Xu

Jinping Yuan

Yiliu Sun

Songbing Yan

Chenyang Zhou

Youcheng Zheng

Chengquan Li

Feng Zhou

Jiyun Shen

Haizhi Zhang

Jiaying Zhang

Xiujian Xia

Jiwei Jiang

Huiting Liu

Zhao Huang

Guifu Wang

Jiliang Liu

Yong Li

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

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

Congfeng Qu