Liquid additives control cement slurry properties

Segun Ogunsanya, Xiaodong Zhao, Lloyd R. Heinze, Doug W. Walser

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


While liquid additives are used in offshore & international cementing operations, land-based operations use a bulk-dry-batch-mixed process. Additives control cement volumetric yield, thickening time, compressive strength, free water, rheology, and fluid loss control. Computerized closed-loop control of liquid additives 1) allow unused, uncontaminated cement to be hauled off location after an operation, 2) promote environmental responsibility by reducing the volume of waste cement hauled to a landfill, and 3) provide better quality control of slurries pumped "on-the-fly" due to better distribution of additives in the slurry and tighter computerized tolerances. Surface slurries utilizing liquid sodium silicate in API Class C cement were designed to meet or exceed Texas Railroad Commission Rule 13 requirements for "zone of critical cement" "extended cement" systems. Slurries were tested for thickening time, free water, compressive strength, and rheology for various combinations of weight, water, yield, additive concentration, and adherence to TRRC (Texas Railroad Commission) Rule 13 specifications.

Original languageEnglish
Pages (from-to)373-379
Number of pages7
JournalProceedings of the Annual Southwestern Petroleum Short Course
StatePublished - 2003
EventProceedings of the Fiftieth Annual Southwestern Petroleum Short Course - Lubbock, TX, United States
Duration: Apr 16 2003Apr 17 2003


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