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Chen G.,The First Cementing Branch of Bohai Drilling and Exploration Company | Lian J.,The First Cementing Branch of Bohai Drilling and Exploration Company | Yang Z.,The First Cementing Branch of Bohai Drilling and Exploration Company | Ren L.,The First Cementing Branch of Bohai Drilling and Exploration Company | And 2 more authors.
Drilling Fluid and Completion Fluid | Year: 2014

Salt formations greatly affect water loss, thickening time and compressive strength of cement slurry and set cement. When cementing gas storage wells in salt caverns, cement slurries are used in the salt surroundings. Salt causes cementing slurry to be greatly retarded and to have reduced strength, because of lack of accelerating agent that can be used in salt environment. Study on the effect of salt on the performance of cement slurry was performed, and ultra fine strengthening agent was used in combination with other solid materials to accelerate the cement slurry. Using this technology, a low salinity enhanced cement slurry and running technique were developed. This cement slurry has successfully been used to cement 10 shallow salt cavern gas storage wells, 80% of the cemented wells has excellent cementing job quality. This technology has been widely used in Yunying in Hubei, Pingdingshan in Henan and Hengyang in Hunan. Source

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