Production Casing and Cementing

Well Completion Requirements

Cement slurry is a mixed liquid that is composed of cement, water, and various chemical additives and has a certain density. No matter which cementing method is used, cement slurry contacts certainly with the oil and gas reservoir. The cement slurry has a much larger filtration loss than drilling fluid and will unavoidably cause formation damage to various oil and gas reservoirs to a different degree, which includes mainly the mechanical plugging of cement slurry particles, the entering of cement slurry filtrate, the crystallization and precipitation of inorganic matter in cement slurry filtrate, and cement slurry leakage. If a shield-type temporary plugging drilling fluid is adopted during drilling-in, the aforementioned formation damage caused by cement slurry may be obviously reduced.

Cement additives

Cement slurries containing a latex emulsion may coagulate when contacted with a salt solution. In this way, a gelled mixture is formed that is no longer useful as a cement sealant composition. However, special formulations of cement slurries have been developed that are stable to salt water.

There, the latex must be premixed with a stabilizer until a homogenous solution is formed. Then the latex can be safely contacted with the salt water. Suitable latex stabilizers are ethoxylated nonyl phenol and oligo ethoxylated iso-dodecyl alcohol ether sulfate [61]. Actually, these compounds belong to the class of surfactants.

Amber Zhang Ms.

Foreign trade 

Zhejiang Ruico Advanced Materials Co., Ltd. (Stock No.873233)

Add: No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China 313018

Phone: +86 (572) 2903236

Fax: +86 (572) 2905222

Wechat: 15534631339

Website: www.ruicoglobal.com 

Email: [email protected]