Research and Practice on Cement Slurry of Oil and Gas Reservoir Protection

摘要

Based on the reservoir characteristics of Turpan-Hami (TH) oilfield and the damage mechanism of the cement slurry to reservoir, and in combination with the cementing features of different wells and their requirements on cement slurry performances, cement additives are optimized for reservoir protection. These are fluid-loss additives that contain macromolecule material, dispersant composed of polycondensated sulfides, gas channeling inhibitor of fine aluminum, fluid retardant, and so forth. Optimized cement slurry systems greatly improve the cementing quality, minimize the formation damage, and protect oil and gas reservoirs.