Author(s)
Muhammad Asim Saeed, Babar Shahzad
- Manuscript ID: 140844
- Volume: 2
- Issue: 7
- Pages: 636–646
Subject Area: Engineering
Abstract
The essential factor in cement setting is the transition of cement slurry to a solid phase and invasion of fluid during this time period intercepts in achieving a proper cement job. Shallow and highly pressurized water zones have been identified in the area of study. The water flows from these zones through the cement to the surface, thus addressing well control hazards and environmental issues. There are various characteristics that define a baseline for a cement to have, to prevent the water percolation through it while setting. The key role resides in thickening time and static gel strength development of the cement slurry.
The foamed cement, particle size distribution (PSD) cement and microsphere cements have been known to have successfully mitigated the water percolation problem. Each solution has its own merits and demerits thus cost is a crucial factor in selecting one of these solutions.
Two cement slurries were proposed named A-Slurry#1 and A-Slurry#2, these slurries have transition time 2 minutes and 1 minutes respectively as compared to the 13 minutes transition time of case study slurry. The short transition time of the proposed slurries and other characteristics establishes this slurry as a potential candidate to overcome the shallow water flow problems concurrent in the field.