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- Title
盐穴储能库固井工艺.
- Authors
刘自茹; 肖尧; 陈旭; 郝华中; 凌勇; 敖明明
- Abstract
Compressed air energy storage (CAES) technology is a large-scale, flexible and low carbon energy storage technology that utilizes compressed air for energy storage. All injectors and producers in the Yunying energy storage are faced with well cementing difficulties such as low formation temperature, large hole diameter, potential losses of cement slurry during well cementing, frequent alternation between injection and production, as well as strict requirements for long-term isolation of the wellbore etc. To solve these difficulties, well cementing techniques suitable for the CASE wells drilled in Yingcheng, Hubei Province are studied. A low-temperature salt-resistant tough cement slurry suitable for cementing the injectors and the producers drilled for the salt cavern energy storage is developed based on the close packing design theory and the induction of crystal phase structure design method. A set of well cementing technique based on this new cement slurry is developed. The density of the cement slurry can be adjusted between 1.88 g/cm3 and 1.93 g/cm³ . The thickening time of the cement slurry is easy to be changed to meet the operation requirements. The cement slurry has no density difference between the top and the bottom, zero free water and API filter loss of less than or equal to 50 mL. Contamination by salt to semi-saturation is of no influence to the performance of the cement slurry. The 7 d elastic modulus is less than 6.13 GPa. At temperatures lower than 30 ℃, the strength of the cement slurry can develop in less than 10 h. The 24 h compressive strength of the set cement is greater than 14 MPa. This cement slurry and the well cementing techniques have been used in the cementing of the surface casing and the production casing of the injectors and the producers drilled for the CAES in the Yunying basin in Hubei. The cementing job is 100% qualified and 95% of which is excellent.
- Subjects
COMPRESSED air energy storage; CEMENT slurry; WATER filters; CASING drilling; ENERGY storage; SLURRY
- Publication
Drilling Fluid & Completion Fluid, 2024, Vol 41, Issue 3, p374
- ISSN
1001-5620
- Publication type
Article
- DOI
10.12358/j.issn.1001-5620.2024.03.013